[13921] | 1 | MODULE icedyn_rhg_vp |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE icedyn_rhg_vp *** |
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| 4 | !! Sea-Ice dynamics : Viscous-plastic rheology with LSR technique |
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| 5 | !!====================================================================== |
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| 6 | !! |
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| 7 | !! History : - ! 1997-20 (J. Zhang, M. Losch) Original code, implementation into mitGCM |
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| 8 | !! 4.0 ! 2020-09 (M. Vancoppenolle) Adaptation to SI3 |
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| 9 | !! |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | #if defined key_si3 |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | !! 'key_si3' SI3 sea-ice model |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | !! ice_dyn_rhg_vp : computes ice velocities from VP rheolog with LSR solvery |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | USE phycst ! Physical constants |
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| 18 | USE dom_oce ! Ocean domain |
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| 19 | USE sbc_oce , ONLY : ln_ice_embd, nn_fsbc, ssh_m |
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| 20 | USE sbc_ice , ONLY : utau_ice, vtau_ice, snwice_mass, snwice_mass_b |
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| 21 | USE ice ! sea-ice: ice variables |
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| 22 | USE icevar ! ice_var_sshdyn |
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| 23 | USE icedyn_rdgrft ! sea-ice: ice strength |
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| 24 | USE bdy_oce , ONLY : ln_bdy |
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| 25 | USE bdyice |
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| 26 | #if defined key_agrif |
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| 27 | USE agrif_ice_interp |
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| 28 | #endif |
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| 29 | ! |
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| 30 | USE in_out_manager ! I/O manager |
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| 31 | USE iom ! I/O manager library |
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| 32 | USE lib_mpp ! MPP library |
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| 33 | USE lib_fortran ! fortran utilities (glob_sum + no signed zero) |
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| 34 | USE lbclnk ! lateral boundary conditions (or mpp links) |
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| 35 | USE prtctl ! Print control |
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| 36 | |
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| 37 | USE netcdf ! NetCDF library for convergence test |
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| 38 | IMPLICIT NONE |
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| 39 | PRIVATE |
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| 40 | |
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| 41 | PUBLIC ice_dyn_rhg_vp ! called by icedyn_rhg.F90 |
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| 42 | |
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[13965] | 43 | |
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| 44 | LOGICAL :: lp_zebra_vp =.TRUE. ! activate zebra (solve the linear system problem every odd j-band, then one every even one) |
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| 45 | REAL(wp) :: zrelaxu_vp=0.95 ! U-relaxation factor (MV: can probably be merged with V-factor once ok) |
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| 46 | REAL(wp) :: zrelaxv_vp=0.95 ! V-relaxation factor |
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| 47 | REAL(wp) :: zuerr_max_vp=0.80 ! maximum velocity error, above which a forcing error is considered and solver is stopped |
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| 48 | REAL(wp) :: zuerr_min_vp=1.e-04 ! minimum velocity error, beyond which convergence is assumed |
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| 49 | |
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[13921] | 50 | !! for convergence tests |
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| 51 | INTEGER :: ncvgid ! netcdf file id |
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| 52 | INTEGER :: nvarid_ures |
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| 53 | INTEGER :: nvarid_vres |
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| 54 | INTEGER :: nvarid_velres |
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| 55 | INTEGER :: nvarid_udif |
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| 56 | INTEGER :: nvarid_vdif |
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| 57 | INTEGER :: nvarid_veldif |
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| 58 | INTEGER :: nvarid_mke |
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| 59 | INTEGER :: nvarid_ures_xy, nvarid_vres_xy |
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| 60 | |
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| 61 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zmsk00, zmsk15 |
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| 62 | |
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| 63 | !!---------------------------------------------------------------------- |
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| 64 | !! NEMO/ICE 4.0 , NEMO Consortium (2018) |
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| 65 | !! $Id: icedyn_rhg_vp.F90 13279 2020-07-09 10:39:43Z clem $ |
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| 66 | !! Software governed by the CeCILL license (see ./LICENSE) |
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| 67 | !!---------------------------------------------------------------------- |
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| 68 | |
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| 69 | CONTAINS |
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| 70 | |
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| 71 | SUBROUTINE ice_dyn_rhg_vp( kt, pshear_i, pdivu_i, pdelta_i ) |
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| 72 | !!------------------------------------------------------------------- |
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| 73 | !! |
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| 74 | !! *** SUBROUTINE ice_dyn_rhg_vp *** |
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| 75 | !! VP-LSR-C-grid |
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| 76 | !! |
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| 77 | !! ** Purpose : determines sea ice drift from wind stress, ice-ocean |
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| 78 | !! stress and sea-surface slope. Internal forces assume viscous-plastic rheology (Hibler, 1979) |
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| 79 | !! |
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| 80 | !! ** Method |
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| 81 | !! |
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| 82 | !! The resolution algorithm follows from Zhang and Hibler (1997) and Losch (2010) |
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| 83 | !! with elements from Lemieux and Tremblay (2008) and Lemieux and Tremblay (2009) |
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| 84 | !! |
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| 85 | !! The components of the momentum equations are arranged following the ideas of Zhang and Hibler (1997) |
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| 86 | !! |
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| 87 | !! f1(u) = g1(v) |
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| 88 | !! f2(v) = g2(v) |
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| 89 | !! |
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| 90 | !! The right-hand side (RHS) is explicit |
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| 91 | !! The left-hand side (LHS) is implicit |
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| 92 | !! Coriolis is part of explicit terms, whereas ice-ocean drag is implicit |
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| 93 | !! |
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| 94 | !! Two iteration levels (outer and inner loops) are used to solve the equations |
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| 95 | !! |
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| 96 | !! The outer loop (OL, typically 10 iterations) is there to deal with the (strong) non-linearities in the equation |
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| 97 | !! |
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| 98 | !! The inner loop (IL, typically 1500 iterations) is there to solve the linear problem with a line-successive-relaxation algorithm |
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| 99 | !! |
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| 100 | !! The velocity used in the non-linear terms uses a "modified euler time step" (not sure its the correct term), |
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| 101 | !!! with uk = ( uk-1 + uk-2 ) / 2. |
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| 102 | !! |
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| 103 | !! * Spatial discretization |
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| 104 | !! |
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| 105 | !! Assumes a C-grid |
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| 106 | !! |
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| 107 | !! The points in the C-grid look like this, my darling |
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| 108 | !! |
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| 109 | !! (ji,jj) |
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| 110 | !! | |
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| 111 | !! | |
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| 112 | !! (ji-1,jj) | (ji,jj) |
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| 113 | !! --------- |
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| 114 | !! | | |
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| 115 | !! | (ji,jj) |------(ji,jj) |
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| 116 | !! | | |
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| 117 | !! --------- |
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| 118 | !! (ji-1,jj-1) (ji,jj-1) |
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| 119 | !! |
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| 120 | !! ** Inputs : - wind forcing (stress), oceanic currents |
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| 121 | !! ice total volume (vt_i) per unit area |
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| 122 | !! snow total volume (vt_s) per unit area |
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| 123 | !! |
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| 124 | !! ** Action : |
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| 125 | !! |
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| 126 | !! ** Steps : |
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| 127 | !! |
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| 128 | !! ** Notes : |
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| 129 | !! |
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| 130 | !! References : Zhang and Hibler, JGR 1997; Losch et al., OM 2010., Lemieux et al., 2008, 2009, ... |
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| 131 | !! |
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| 132 | !! |
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| 133 | !!------------------------------------------------------------------- |
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| 134 | !! |
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| 135 | INTEGER , INTENT(in ) :: kt ! time step |
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| 136 | REAL(wp), DIMENSION(:,:), INTENT( out) :: pshear_i , pdivu_i , pdelta_i ! |
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| 137 | !! |
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| 138 | LOGICAL :: ll_u_iterate, ll_v_iterate ! continue iteration or not |
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| 139 | ! |
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| 140 | INTEGER :: ji, ji2, jj, jj2, jn ! dummy loop indices |
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| 141 | INTEGER :: jter, i_out, i_inn ! |
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| 142 | INTEGER :: ji_min, jj_min ! |
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| 143 | INTEGER :: nn_zebra_vp ! number of zebra steps |
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| 144 | |
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| 145 | INTEGER :: nn_nvp ! total number of VP iterations (n_out_vp*n_inn_vp) |
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| 146 | ! |
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[13967] | 147 | REAL(wp) :: zrhoco ! rho0 * rn_cio |
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[13921] | 148 | REAL(wp) :: ecc2, z1_ecc2 ! square of yield ellipse eccenticity |
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| 149 | REAL(wp) :: zglob_area ! global ice area for diagnostics |
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| 150 | REAL(wp) :: zkt ! isotropic tensile strength for landfast ice |
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| 151 | REAL(wp) :: zm1, zm2, zm3, zmassU, zmassV ! ice/snow mass and volume |
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| 152 | REAL(wp) :: zdeltat, zds2, zdt, zdt2, zdiv, zdiv2 ! temporary scalars |
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| 153 | REAL(wp) :: zp_deltastar_f ! |
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| 154 | REAL(wp) :: zu_cV, zv_cU ! |
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| 155 | REAL(wp) :: zfac, zfac1, zfac2, zfac3 |
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| 156 | REAL(wp) :: zt12U, zt11U, zt22U, zt21U, zt122U, zt121U |
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| 157 | REAL(wp) :: zt12V, zt11V, zt22V, zt21V, zt122V, zt121V |
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| 158 | REAL(wp) :: zAA3, zw, ztau, zuerr_max, zverr_max |
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| 159 | ! |
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| 160 | REAL(wp), DIMENSION(jpi,jpj) :: zfmask ! mask at F points for the ice |
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| 161 | REAL(wp), DIMENSION(jpi,jpj) :: za_iU , za_iV ! ice fraction on U/V points |
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| 162 | REAL(wp), DIMENSION(jpi,jpj) :: zmU_t, zmV_t ! Acceleration term contribution to RHS |
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| 163 | REAL(wp), DIMENSION(jpi,jpj) :: zmassU_t, zmassV_t ! Mass per unit area divided by time step |
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| 164 | ! |
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| 165 | REAL(wp), DIMENSION(jpi,jpj) :: zdeltastar_t ! Delta* at T-points |
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| 166 | REAL(wp), DIMENSION(jpi,jpj) :: zten_i ! Tension |
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| 167 | REAL(wp), DIMENSION(jpi,jpj) :: zp_deltastar_t ! P/delta* at T points |
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| 168 | REAL(wp), DIMENSION(jpi,jpj) :: zzt, zet ! Viscosity pre-factors at T points |
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| 169 | REAL(wp), DIMENSION(jpi,jpj) :: zef ! Viscosity pre-factor at F point |
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| 170 | ! |
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| 171 | REAL(wp), DIMENSION(jpi,jpj) :: zmt ! Mass per unit area at t-point |
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| 172 | REAL(wp), DIMENSION(jpi,jpj) :: zmf ! Coriolis factor (m*f) at t-point |
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| 173 | REAL(wp), DIMENSION(jpi,jpj) :: v_oceU, u_oceV, v_iceU, u_iceV ! ocean/ice u/v component on V/U points |
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| 174 | REAL(wp), DIMENSION(jpi,jpj) :: zu_c, zv_c ! "current" ice velocity (m/s), average of previous two OL iterates |
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| 175 | REAL(wp), DIMENSION(jpi,jpj) :: zu_b, zv_b ! velocity at previous sub-iterate |
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| 176 | REAL(wp), DIMENSION(jpi,jpj) :: zuerr, zverr ! absolute U/Vvelocity difference between current and previous sub-iterates |
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| 177 | ! |
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| 178 | REAL(wp), DIMENSION(jpi,jpj) :: zds ! shear |
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| 179 | REAL(wp), DIMENSION(jpi,jpj) :: zsshdyn ! array used for the calculation of ice surface slope: |
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| 180 | ! ! ocean surface (ssh_m) if ice is not embedded |
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| 181 | ! ! ice bottom surface if ice is embedded |
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| 182 | REAL(wp), DIMENSION(jpi,jpj) :: zCwU, zCwV ! ice-ocean drag pre-factor (rho*c*module(u)) |
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| 183 | REAL(wp), DIMENSION(jpi,jpj) :: zspgU, zspgV ! surface pressure gradient at U/V points |
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| 184 | REAL(wp), DIMENSION(jpi,jpj) :: zCorU, zCorV ! Coriolis stress array |
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| 185 | REAL(wp), DIMENSION(jpi,jpj) :: ztaux_ai, ztauy_ai ! ice-atm. stress at U-V points |
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| 186 | REAL(wp), DIMENSION(jpi,jpj) :: ztaux_oi_rhsu, ztauy_oi_rhsv ! ice-ocean stress RHS contribution at U-V points |
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| 187 | REAL(wp), DIMENSION(jpi,jpj) :: zs1_rhsu, zs2_rhsu, zs12_rhsu ! internal stress contributions to RHSU |
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| 188 | REAL(wp), DIMENSION(jpi,jpj) :: zs1_rhsv, zs2_rhsv, zs12_rhsv ! internal stress contributions to RHSV |
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| 189 | REAL(wp), DIMENSION(jpi,jpj) :: zf_rhsu, zf_rhsv ! U- and V- components of internal force RHS contributions |
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| 190 | REAL(wp), DIMENSION(jpi,jpj) :: zrhsu, zrhsv ! U and V RHS |
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| 191 | REAL(wp), DIMENSION(jpi,jpj) :: zAU, zBU, zCU, zDU, zEU ! Linear system coefficients, U equation |
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| 192 | REAL(wp), DIMENSION(jpi,jpj) :: zAV, zBV, zCV, zDV, zEV ! Linear system coefficients, V equation |
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| 193 | REAL(wp), DIMENSION(jpi,jpj) :: zFU, zFU_prime, zBU_prime ! Rearranged linear system coefficients, U equation |
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| 194 | REAL(wp), DIMENSION(jpi,jpj) :: zFV, zFV_prime, zBV_prime ! Rearranged linear system coefficients, V equation |
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| 195 | REAL(wp), DIMENSION(jpi,jpj) :: zCU_prime, zCV_prime ! Rearranged linear system coefficients, V equation |
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| 196 | !!! REAL(wp), DIMENSION(jpi,jpj) :: ztaux_bi, ztauy_bi ! ice-OceanBottom stress at U-V points (landfast) |
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| 197 | !!! REAL(wp), DIMENSION(jpi,jpj) :: ztaux_base, ztauy_base ! ice-bottom stress at U-V points (landfast) |
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| 198 | ! |
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| 199 | REAL(wp), DIMENSION(jpi,jpj) :: zmsk01x, zmsk01y ! mask for lots of ice (1), little ice (0) |
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| 200 | REAL(wp), DIMENSION(jpi,jpj) :: zmsk00x, zmsk00y ! mask for ice presence (1), no ice (0) |
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| 201 | ! |
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| 202 | REAL(wp), PARAMETER :: zepsi = 1.0e-20_wp ! tolerance parameter |
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| 203 | REAL(wp), PARAMETER :: zmmin = 1._wp ! ice mass (kg/m2) below which ice velocity becomes very small |
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| 204 | REAL(wp), PARAMETER :: zamin = 0.001_wp ! ice concentration below which ice velocity becomes very small |
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| 205 | !! --- diags |
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| 206 | REAL(wp) :: zsig1, zsig2, zsig12, zdelta, z1_strength, zfac_x, zfac_y |
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| 207 | REAL(wp), DIMENSION(jpi,jpj) :: zs1, zs2, zs12, zs12f ! stress tensor components |
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| 208 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zsig_I, zsig_II, zsig1_p, zsig2_p |
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| 209 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: ztaux_oi, ztauy_oi |
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| 210 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_xmtrp_ice, zdiag_ymtrp_ice ! X/Y-component of ice mass transport (kg/s, SIMIP) |
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| 211 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_xmtrp_snw, zdiag_ymtrp_snw ! X/Y-component of snow mass transport (kg/s, SIMIP) |
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| 212 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_xatrp, zdiag_yatrp ! X/Y-component of area transport (m2/s, SIMIP) |
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[13965] | 213 | |
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| 214 | |
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| 215 | CALL ctl_stop( 'STOP', 'icedyn_rhg_vp: stop because vp rheology is an ongoing work and should not be used' ) |
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| 216 | |
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[13921] | 217 | !!---------------------------------------------------------------------------------------------------------------------- |
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| 218 | ! DEBUG put all forcing terms to zero |
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| 219 | ! air-ice drag |
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| 220 | utau_ice(:,:) = 0._wp |
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| 221 | vtau_ice(:,:) = 0._wp |
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| 222 | ! coriolis |
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| 223 | ff_t(:,:) = 0._wp |
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| 224 | ! ice-ocean drag |
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| 225 | rn_cio = 0._wp |
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| 226 | ! ssh |
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| 227 | ! done line 330 !!! dont forget to act there |
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| 228 | ! END DEBUG |
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| 229 | |
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| 230 | IF( kt == nit000 .AND. lwp ) WRITE(numout,*) '-- ice_dyn_rhg_vp: VP sea-ice rheology (LSR solver)' |
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| 231 | IF( lwp ) WRITE(numout,*) '-- ice_dyn_rhg_vp: VP sea-ice rheology (LSR solver)' |
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| 232 | |
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| 233 | !------------------------------------------------------------------------------! |
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| 234 | ! |
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| 235 | ! --- Initialization |
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| 236 | ! |
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| 237 | !------------------------------------------------------------------------------! |
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| 238 | |
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| 239 | ! for diagnostics and convergence tests |
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| 240 | ALLOCATE( zmsk00(jpi,jpj), zmsk15(jpi,jpj) ) |
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| 241 | DO jj = 1, jpj |
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| 242 | DO ji = 1, jpi |
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| 243 | zmsk00(ji,jj) = MAX( 0._wp , SIGN( 1._wp , at_i(ji,jj) - epsi06 ) ) ! 1 if ice , 0 if no ice |
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| 244 | zmsk15(ji,jj) = MAX( 0._wp , SIGN( 1._wp , at_i(ji,jj) - 0.15_wp ) ) ! 1 if 15% ice, 0 if less |
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| 245 | END DO |
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| 246 | END DO |
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| 247 | |
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[13965] | 248 | IF ( lp_zebra_vp ) THEN; nn_zebra_vp = 2 |
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[13921] | 249 | ELSE; nn_zebra_vp = 1; ENDIF |
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| 250 | |
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[13965] | 251 | nn_nvp = nn_vp_nout * nn_vp_ninn ! maximum number of iterations |
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[13921] | 252 | |
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[13965] | 253 | IF( lwp ) WRITE(numout,*) ' lp_zebra_vp : ', lp_zebra_vp |
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[13921] | 254 | IF( lwp ) WRITE(numout,*) ' nn_zebra_vp : ', nn_zebra_vp |
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| 255 | IF( lwp ) WRITE(numout,*) ' nn_nvp : ', nn_nvp |
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| 256 | |
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[13967] | 257 | zrhoco = rho0 * rn_cio |
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[13921] | 258 | |
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| 259 | ! ecc2: square of yield ellipse eccentricity |
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| 260 | ecc2 = rn_ecc * rn_ecc |
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| 261 | z1_ecc2 = 1._wp / ecc2 |
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| 262 | |
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| 263 | ! Initialise convergence checks |
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[13967] | 264 | IF( nn_rhg_chkcvg /= 0 ) THEN |
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[13921] | 265 | |
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| 266 | ! ice area for global mean kinetic energy |
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| 267 | zglob_area = glob_sum( 'ice_rhg_vp', at_i(:,:) * e1e2t(:,:) ) ! global ice area (km2) |
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| 268 | |
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| 269 | ENDIF |
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| 270 | |
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| 271 | ! Landfast param from Lemieux(2016): add isotropic tensile strength (following Konig Beatty and Holland, 2010) |
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| 272 | ! MV: Not working yet... |
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| 273 | IF( ln_landfast_L16 ) THEN ; zkt = rn_lf_tensile |
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| 274 | ELSE ; zkt = 0._wp |
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| 275 | ENDIF |
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| 276 | |
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| 277 | zs1_rhsu(:,:) = 0._wp; zs2_rhsu(:,:) = 0._wp; zs1_rhsv(:,:) = 0._wp; zs2_rhsv(:,:) = 0._wp |
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| 278 | zAU(:,:) = 0._wp; zBU(:,:) = 0._wp; zCU(:,:) = 0._wp; zDU(:,:) = 0._wp; zEU(:,:) = 0._wp; |
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| 279 | zAV(:,:) = 0._wp; zBV(:,:) = 0._wp; zCV(:,:) = 0._wp; zDV(:,:) = 0._wp; zEV(:,:) = 0._wp; |
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| 280 | zrhsu(:,:) = 0._wp; zrhsv(:,:) = 0._wp |
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| 281 | zf_rhsu(:,:) = 0._wp; zf_rhsv(:,:) = 0._wp |
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| 282 | |
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| 283 | !------------------------------------------------------------------------------! |
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| 284 | ! |
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| 285 | ! --- Time-independent quantities |
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| 286 | ! |
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| 287 | !------------------------------------------------------------------------------! |
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| 288 | |
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| 289 | CALL ice_strength ! strength at T points |
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| 290 | |
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| 291 | !------------------------------ |
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| 292 | ! -- F-mask (code from EVP) |
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| 293 | !------------------------------ |
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| 294 | ! MartinV: |
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| 295 | ! In EVP routine, zfmask is applied on shear at F-points, in order to enforce the lateral boundary condition (no-slip, ..., free-slip) |
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| 296 | ! I am not sure the same recipe applies here |
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| 297 | |
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| 298 | ! - ocean/land mask |
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| 299 | DO jj = 1, jpj - 1 |
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| 300 | DO ji = 1, jpi - 1 |
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| 301 | zfmask(ji,jj) = tmask(ji,jj,1) * tmask(ji+1,jj,1) * tmask(ji,jj+1,1) * tmask(ji+1,jj+1,1) |
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| 302 | END DO |
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| 303 | END DO |
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| 304 | |
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| 305 | ! Lateral boundary conditions on velocity (modify zfmask) |
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| 306 | ! Can be computed once for all, at first time step, for all rheologies |
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| 307 | DO jj = 2, jpj - 1 |
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| 308 | DO ji = 2, jpi - 1 ! vector opt. |
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| 309 | IF( zfmask(ji,jj) == 0._wp ) THEN |
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| 310 | zfmask(ji,jj) = rn_ishlat * MIN( 1._wp , MAX( umask(ji,jj,1), umask(ji,jj+1,1), & |
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| 311 | & vmask(ji,jj,1), vmask(ji+1,jj,1) ) ) |
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| 312 | ENDIF |
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| 313 | END DO |
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| 314 | END DO |
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| 315 | DO jj = 2, jpj - 1 |
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| 316 | IF( zfmask(1,jj) == 0._wp ) THEN |
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| 317 | zfmask(1 ,jj) = rn_ishlat * MIN( 1._wp , MAX( vmask(2,jj,1), umask(1,jj+1,1), umask(1,jj,1) ) ) |
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| 318 | ENDIF |
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| 319 | IF( zfmask(jpi,jj) == 0._wp ) THEN |
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| 320 | zfmask(jpi,jj) = rn_ishlat * MIN( 1._wp , MAX( umask(jpi,jj+1,1), vmask(jpi - 1,jj,1), umask(jpi,jj-1,1) ) ) |
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| 321 | ENDIF |
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| 322 | END DO |
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| 323 | DO ji = 2, jpi - 1 |
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| 324 | IF( zfmask(ji,1) == 0._wp ) THEN |
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| 325 | zfmask(ji, 1 ) = rn_ishlat * MIN( 1._wp , MAX( vmask(ji+1,1,1), umask(ji,2,1), vmask(ji,1,1) ) ) |
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| 326 | ENDIF |
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| 327 | IF( zfmask(ji,jpj) == 0._wp ) THEN |
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| 328 | zfmask(ji,jpj) = rn_ishlat * MIN( 1._wp , MAX( vmask(ji+1,jpj,1), vmask(ji-1,jpj,1), umask(ji,jpj - 1,1) ) ) |
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| 329 | ENDIF |
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| 330 | END DO |
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| 331 | |
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| 332 | CALL lbc_lnk( 'icedyn_rhg_vp', zfmask, 'F', 1._wp ) |
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| 333 | |
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| 334 | !---------------------------------------------------------------------------------------------------------- |
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| 335 | ! -- Time-independent pre-factors for acceleration, ocean drag, coriolis, atmospheric drag, surface tilt |
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| 336 | !---------------------------------------------------------------------------------------------------------- |
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| 337 | ! Compute all terms & factors independent of velocities, or only depending on velocities at previous time step |
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| 338 | |
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| 339 | ! sea surface height |
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| 340 | ! embedded sea ice: compute representative ice top surface |
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| 341 | ! non-embedded sea ice: use ocean surface for slope calculation |
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| 342 | zsshdyn(:,:) = ice_var_sshdyn( ssh_m, snwice_mass, snwice_mass_b) |
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| 343 | zsshdyn(:,:) = 0._wp ! DEBUG CAREFUL !!! |
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| 344 | |
---|
| 345 | zmt(:,:) = rhos * vt_s(:,:) + rhoi * vt_i(:,:) ! Snow and ice mass at T-point |
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| 346 | zmf(:,:) = zmt(:,:) * ff_t(:,:) ! Coriolis factor at T points (m*f) |
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| 347 | |
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| 348 | DO jj = 2, jpj - 1 |
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| 349 | DO ji = 2, jpi - 1 |
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| 350 | |
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| 351 | ! Ice fraction at U-V points |
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| 352 | za_iU(ji,jj) = 0.5_wp * ( at_i(ji,jj) * e1e2t(ji,jj) + at_i(ji+1,jj) * e1e2t(ji+1,jj) ) * r1_e1e2u(ji,jj) * umask(ji,jj,1) |
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| 353 | za_iV(ji,jj) = 0.5_wp * ( at_i(ji,jj) * e1e2t(ji,jj) + at_i(ji,jj+1) * e1e2t(ji,jj+1) ) * r1_e1e2v(ji,jj) * vmask(ji,jj,1) |
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| 354 | |
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| 355 | ! Snow and ice mass at U-V points |
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| 356 | zm1 = zmt(ji,jj) |
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| 357 | zm2 = zmt(ji+1,jj) |
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| 358 | zm3 = zmt(ji,jj+1) |
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| 359 | |
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| 360 | zmassU = 0.5_wp * ( zm1 * e1e2t(ji,jj) + zm2 * e1e2t(ji+1,jj) ) * r1_e1e2u(ji,jj) * umask(ji,jj,1) |
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| 361 | zmassV = 0.5_wp * ( zm1 * e1e2t(ji,jj) + zm3 * e1e2t(ji,jj+1) ) * r1_e1e2v(ji,jj) * vmask(ji,jj,1) |
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| 362 | |
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| 363 | ! Mass per unit area divided by time step |
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[13967] | 364 | zmassU_t(ji,jj) = zmassU * r1_Dt_ice |
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| 365 | zmassV_t(ji,jj) = zmassV * r1_Dt_ice |
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[13921] | 366 | |
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| 367 | ! Acceleration term contribution to RHS (depends on velocity at previous time step) |
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| 368 | zmU_t(ji,jj) = zmassU_t(ji,jj) * u_ice(ji,jj) |
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| 369 | zmV_t(ji,jj) = zmassV_t(ji,jj) * v_ice(ji,jj) |
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| 370 | |
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| 371 | ! Ocean currents at U-V points |
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| 372 | v_oceU(ji,jj) = 0.25_wp * ( v_oce(ji,jj) + v_oce(ji,jj-1) + v_oce(ji+1,jj) + v_oce(ji+1,jj-1) ) * umask(ji,jj,1) |
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| 373 | u_oceV(ji,jj) = 0.25_wp * ( u_oce(ji,jj) + u_oce(ji-1,jj) + u_oce(ji,jj+1) + u_oce(ji-1,jj+1) ) * vmask(ji,jj,1) |
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| 374 | |
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| 375 | ! Wind stress |
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| 376 | ztaux_ai(ji,jj) = za_iU(ji,jj) * utau_ice(ji,jj) |
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| 377 | ztauy_ai(ji,jj) = za_iV(ji,jj) * vtau_ice(ji,jj) |
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| 378 | |
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| 379 | ! Force due to sea surface tilt(- m*g*GRAD(ssh)) |
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| 380 | zspgU(ji,jj) = - zmassU * grav * ( zsshdyn(ji+1,jj) - zsshdyn(ji,jj) ) * r1_e1u(ji,jj) |
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| 381 | zspgV(ji,jj) = - zmassV * grav * ( zsshdyn(ji,jj+1) - zsshdyn(ji,jj) ) * r1_e2v(ji,jj) |
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| 382 | |
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| 383 | ! Mask for ice presence (1) or absence (0) |
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| 384 | zmsk00x(ji,jj) = 1._wp - MAX( 0._wp, SIGN( 1._wp, -zmassU ) ) ! 0 if no ice |
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| 385 | zmsk00y(ji,jj) = 1._wp - MAX( 0._wp, SIGN( 1._wp, -zmassV ) ) ! 0 if no ice |
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| 386 | |
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| 387 | ! Mask for lots of ice (1) or little ice (0) |
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| 388 | IF ( zmassU <= zmmin .AND. za_iU(ji,jj) <= zamin ) THEN ; zmsk01x(ji,jj) = 0._wp |
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| 389 | ELSE ; zmsk01x(ji,jj) = 1._wp ; ENDIF |
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| 390 | IF ( zmassV <= zmmin .AND. za_iV(ji,jj) <= zamin ) THEN ; zmsk01y(ji,jj) = 0._wp |
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| 391 | ELSE ; zmsk01y(ji,jj) = 1._wp ; ENDIF |
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| 392 | |
---|
| 393 | ! MV TEST DEBUG |
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| 394 | IF ( ( zmt(ji,jj) <= zmmin .OR. zmt(ji+1,jj) <= zmmin ) .AND. & |
---|
| 395 | & ( at_i(ji,jj) <= zamin .OR. at_i(ji+1,jj) <= zamin ) ) THEN ; zmsk01x(ji,jj) = 0._wp |
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| 396 | ELSE ; zmsk01x(ji,jj) = 1._wp ; ENDIF |
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| 397 | |
---|
| 398 | IF ( ( zmt(ji,jj) <= zmmin .OR. zmt(ji,jj+1) <= zmmin ) .AND. & |
---|
| 399 | & ( at_i(ji,jj) <= zamin .OR. at_i(ji,jj+1) <= zamin ) ) THEN ; zmsk01y(ji,jj) = 0._wp |
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| 400 | ELSE ; zmsk01y(ji,jj) = 1._wp ; ENDIF |
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| 401 | ! END MV TEST DEBUG |
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| 402 | |
---|
| 403 | END DO |
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| 404 | END DO |
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| 405 | |
---|
| 406 | CALL iom_put( 'zmsk00x' , zmsk00x ) ! MV DEBUG |
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| 407 | CALL iom_put( 'zmsk00y' , zmsk00y ) ! MV DEBUG |
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| 408 | CALL iom_put( 'zmsk01x' , zmsk01x ) ! MV DEBUG |
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| 409 | CALL iom_put( 'zmsk01y' , zmsk01y ) ! MV DEBUG |
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| 410 | CALL iom_put( 'ztaux_ai' , ztaux_ai ) ! MV DEBUG |
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| 411 | CALL iom_put( 'ztauy_ai' , ztauy_ai ) ! MV DEBUG |
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| 412 | CALL iom_put( 'zspgU' , zspgU ) ! MV DEBUG |
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| 413 | CALL iom_put( 'zspgV' , zspgV ) ! MV DEBUG |
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| 414 | |
---|
| 415 | !------------------------------------------------------------------------------! |
---|
| 416 | ! |
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| 417 | ! --- Start outer loop |
---|
| 418 | ! |
---|
| 419 | !------------------------------------------------------------------------------! |
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| 420 | |
---|
| 421 | zu_c(:,:) = u_ice(:,:) |
---|
| 422 | zv_c(:,:) = v_ice(:,:) |
---|
| 423 | |
---|
| 424 | jter = 0 |
---|
| 425 | |
---|
[13965] | 426 | DO i_out = 1, nn_vp_nout |
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[13921] | 427 | |
---|
| 428 | IF( lwp ) WRITE(numout,*) ' outer loop i_out : ', i_out |
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| 429 | |
---|
| 430 | ! Velocities used in the non linear terms are the average of the past two iterates |
---|
| 431 | ! u_it = 0.5 * ( u_{it-1} + u_{it-2}) |
---|
| 432 | ! Also used in Hibler and Ackley (1983); Zhang and Hibler (1997); Lemieux and Tremblay (2009) |
---|
| 433 | zu_c(:,:) = 0.5_wp * ( u_ice(:,:) + zu_c(:,:) ) |
---|
| 434 | zv_c(:,:) = 0.5_wp * ( v_ice(:,:) + zv_c(:,:) ) |
---|
| 435 | |
---|
| 436 | !------------------------------------------------------------------------------! |
---|
| 437 | ! |
---|
| 438 | ! --- Right-hand side (RHS) of the linear problem |
---|
| 439 | ! |
---|
| 440 | !------------------------------------------------------------------------------! |
---|
| 441 | ! In the outer loop, one needs to update all RHS terms |
---|
| 442 | ! with explicit velocity dependencies (viscosities, coriolis, ocean stress) |
---|
| 443 | ! as a function of uc |
---|
| 444 | ! |
---|
| 445 | |
---|
| 446 | !------------------------------------------ |
---|
| 447 | ! -- Strain rates, viscosities and P/Delta |
---|
| 448 | !------------------------------------------ |
---|
| 449 | |
---|
| 450 | ! --- divergence, tension & shear (Appendix B of Hunke & Dukowicz, 2002) --- ! |
---|
| 451 | DO jj = 1, jpj - 1 ! loops start at 1 since there is no boundary condition (lbc_lnk) at i=1 and j=1 for F points |
---|
| 452 | DO ji = 1, jpi - 1 |
---|
| 453 | |
---|
| 454 | ! shear at F points |
---|
| 455 | zds(ji,jj) = ( ( zu_c(ji,jj+1) * r1_e1u(ji,jj+1) - zu_c(ji,jj) * r1_e1u(ji,jj) ) * e1f(ji,jj) * e1f(ji,jj) & |
---|
| 456 | & + ( zv_c(ji+1,jj) * r1_e2v(ji+1,jj) - zv_c(ji,jj) * r1_e2v(ji,jj) ) * e2f(ji,jj) * e2f(ji,jj) & |
---|
| 457 | & ) * r1_e1e2f(ji,jj) * zfmask(ji,jj) |
---|
| 458 | |
---|
| 459 | END DO |
---|
| 460 | END DO |
---|
| 461 | |
---|
| 462 | CALL lbc_lnk( 'icedyn_rhg_vp', zds, 'F', 1. ) ! MV TEST could be un-necessary according to Gurvan |
---|
| 463 | CALL iom_put( 'zds' , zds ) ! MV DEBUG |
---|
| 464 | |
---|
| 465 | IF( lwp ) WRITE(numout,*) ' outer loop 1a i_out : ', i_out |
---|
| 466 | |
---|
| 467 | !DO jj = 2, jpj - 1 ! loop to jpi,jpj to avoid making a communication for zs1,zs2,zs12 |
---|
| 468 | ! DO ji = 2, jpi - 1 ! |
---|
| 469 | |
---|
| 470 | ! MV DEBUG |
---|
| 471 | DO jj = 2, jpj ! loop to jpi,jpj to avoid making a communication for zs1,zs2,zs12 |
---|
| 472 | DO ji = 2, jpi ! |
---|
| 473 | ! END MV DEBUG |
---|
| 474 | |
---|
| 475 | ! shear**2 at T points (doc eq. A16) |
---|
| 476 | zds2 = ( zds(ji,jj ) * zds(ji,jj ) * e1e2f(ji,jj ) + zds(ji-1,jj ) * zds(ji-1,jj ) * e1e2f(ji-1,jj ) & |
---|
| 477 | & + zds(ji,jj-1) * zds(ji,jj-1) * e1e2f(ji,jj-1) + zds(ji-1,jj-1) * zds(ji-1,jj-1) * e1e2f(ji-1,jj-1) & |
---|
| 478 | & ) * 0.25_wp * r1_e1e2t(ji,jj) |
---|
| 479 | |
---|
| 480 | ! divergence at T points |
---|
| 481 | zdiv = ( e2u(ji,jj) * zu_c(ji,jj) - e2u(ji-1,jj) * zu_c(ji-1,jj) & |
---|
| 482 | & + e1v(ji,jj) * zv_c(ji,jj) - e1v(ji,jj-1) * zv_c(ji,jj-1) & |
---|
| 483 | & ) * r1_e1e2t(ji,jj) |
---|
| 484 | zdiv2 = zdiv * zdiv |
---|
| 485 | |
---|
| 486 | ! tension at T points |
---|
| 487 | zdt = ( ( zu_c(ji,jj) * r1_e2u(ji,jj) - zu_c(ji-1,jj) * r1_e2u(ji-1,jj) ) * e2t(ji,jj) * e2t(ji,jj) & |
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| 488 | & - ( zv_c(ji,jj) * r1_e1v(ji,jj) - zv_c(ji,jj-1) * r1_e1v(ji,jj-1) ) * e1t(ji,jj) * e1t(ji,jj) & |
---|
| 489 | & ) * r1_e1e2t(ji,jj) |
---|
| 490 | zdt2 = zdt * zdt |
---|
| 491 | |
---|
| 492 | ! delta at T points |
---|
| 493 | zdeltat = SQRT( zdiv2 + ( zdt2 + zds2 ) * z1_ecc2 ) |
---|
| 494 | |
---|
| 495 | ! delta* at T points (following Lemieux and Dupont, GMD 2020) |
---|
| 496 | zdeltastar_t(ji,jj) = zdeltat + rn_creepl |
---|
| 497 | |
---|
| 498 | ! P/delta at T-points |
---|
| 499 | zp_deltastar_t(ji,jj) = strength(ji,jj) / zdeltastar_t(ji,jj) |
---|
| 500 | |
---|
| 501 | ! Temporary zzt and zet factors at T-points |
---|
| 502 | zzt(ji,jj) = zp_deltastar_t(ji,jj) * r1_e1e2t(ji,jj) |
---|
| 503 | zet(ji,jj) = zzt(ji,jj) * z1_ecc2 |
---|
| 504 | |
---|
| 505 | END DO |
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| 506 | END DO |
---|
| 507 | |
---|
| 508 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zp_deltastar_t , 'T', 1. , zzt , 'T', 1., zet, 'T', 1. ) |
---|
| 509 | |
---|
| 510 | CALL iom_put( 'zzt' , zzt ) ! MV DEBUG |
---|
| 511 | CALL iom_put( 'zet' , zet ) ! MV DEBUG |
---|
| 512 | CALL iom_put( 'zp_deltastar_t', zp_deltastar_t ) ! MV DEBUG |
---|
| 513 | |
---|
| 514 | IF( lwp ) WRITE(numout,*) ' outer loop 1b i_out : ', i_out |
---|
| 515 | |
---|
| 516 | DO jj = 1, jpj - 1 |
---|
| 517 | DO ji = 1, jpi - 1 |
---|
| 518 | |
---|
| 519 | ! P/delta* at F points |
---|
| 520 | zp_deltastar_f = 0.25_wp * ( zp_deltastar_t(ji,jj) + zp_deltastar_t(ji+1,jj) + zp_deltastar_t(ji,jj+1) + zp_deltastar_t(ji+1,jj+1) ) |
---|
| 521 | |
---|
| 522 | ! Temporary zef factor at F-point |
---|
| 523 | zef(ji,jj) = zp_deltastar_f * r1_e1e2f(ji,jj) * z1_ecc2 * zfmask(ji,jj) |
---|
| 524 | |
---|
| 525 | END DO |
---|
| 526 | END DO |
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| 527 | |
---|
| 528 | CALL lbc_lnk( 'icedyn_rhg_vp', zef, 'F', 1. ) |
---|
| 529 | CALL iom_put( 'zef' , zef ) ! MV DEBUG |
---|
| 530 | IF( lwp ) WRITE(numout,*) ' outer loop 1c i_out : ', i_out |
---|
| 531 | |
---|
| 532 | !--------------------------------------------------- |
---|
| 533 | ! -- Ocean-ice drag and Coriolis RHS contributions |
---|
| 534 | !--------------------------------------------------- |
---|
| 535 | |
---|
| 536 | DO jj = 2, jpj - 1 |
---|
| 537 | DO ji = 2, jpi - 1 |
---|
| 538 | |
---|
| 539 | !--- ice u-velocity @V points, v-velocity @U points (for non-linear drag computation) |
---|
| 540 | zu_cV = 0.25_wp * ( zu_c(ji,jj) + zu_c(ji-1,jj) + zu_c(ji,jj+1) + zu_c(ji-1,jj+1) ) * vmask(ji,jj,1) |
---|
| 541 | zv_cU = 0.25_wp * ( zv_c(ji,jj) + zv_c(ji,jj-1) + zv_c(ji+1,jj) + zv_c(ji+1,jj-1) ) * umask(ji,jj,1) |
---|
| 542 | |
---|
| 543 | !--- non-linear drag coefficients (need to be updated at each outer loop, see Lemieux and Tremblay JGR09, p.3, beginning of Section 3) |
---|
| 544 | zCwU(ji,jj) = za_iU(ji,jj) * zrhoco * SQRT( ( zu_c (ji,jj) - u_oce (ji,jj) ) * ( zu_c (ji,jj) - u_oce (ji,jj) ) & |
---|
| 545 | & + ( zv_cU - v_oceU(ji,jj) ) * ( zv_cU - v_oceU(ji,jj) ) ) |
---|
| 546 | zCwV(ji,jj) = za_iV(ji,jj) * zrhoco * SQRT( ( zv_c (ji,jj) - v_oce (ji,jj) ) * ( zv_c (ji,jj) - v_oce (ji,jj) ) & |
---|
| 547 | & + ( zu_cV - u_oceV(ji,jj) ) * ( zu_cV - u_oceV(ji,jj) ) ) |
---|
| 548 | |
---|
| 549 | !--- Ocean-ice drag contributions to RHS |
---|
| 550 | ztaux_oi_rhsu(ji,jj) = zCwU(ji,jj) * u_oce(ji,jj) |
---|
| 551 | ztauy_oi_rhsv(ji,jj) = zCwV(ji,jj) * v_oce(ji,jj) |
---|
| 552 | |
---|
| 553 | ! --- U-component of Coriolis Force (energy conserving formulation) |
---|
| 554 | ! Note Lemieux et al 2008 recommend to do that implicitly, but I don't really see how this could be done |
---|
| 555 | zCorU(ji,jj) = 0.25_wp * r1_e1u(ji,jj) * & |
---|
| 556 | & ( zmf(ji ,jj) * ( e1v(ji ,jj) * zv_c(ji ,jj) + e1v(ji ,jj-1) * zv_c(ji ,jj-1) ) & |
---|
| 557 | & + zmf(ji+1,jj) * ( e1v(ji+1,jj) * zv_c(ji+1,jj) + e1v(ji+1,jj-1) * zv_c(ji+1,jj-1) ) ) |
---|
| 558 | |
---|
| 559 | ! --- V-component of Coriolis Force (energy conserving formulation) |
---|
| 560 | zCorV(ji,jj) = - 0.25_wp * r1_e2v(ji,jj) * & |
---|
| 561 | & ( zmf(ji,jj ) * ( e2u(ji,jj ) * zu_c(ji,jj ) + e2u(ji-1,jj ) * zu_c(ji-1,jj ) ) & |
---|
| 562 | & + zmf(ji,jj+1) * ( e2u(ji,jj+1) * zu_c(ji,jj+1) + e2u(ji-1,jj+1) * zu_c(ji-1,jj+1) ) ) |
---|
| 563 | |
---|
| 564 | END DO |
---|
| 565 | END DO |
---|
| 566 | |
---|
| 567 | IF( lwp ) WRITE(numout,*) ' outer loop 1d i_out : ', i_out |
---|
| 568 | |
---|
| 569 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zCwU , 'U', -1., zCwV, 'V', -1. ) |
---|
| 570 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zCorU, 'U', -1., zCorV, 'V', -1. ) |
---|
| 571 | |
---|
| 572 | CALL iom_put( 'zCwU' , zCwU ) ! MV DEBUG |
---|
| 573 | CALL iom_put( 'zCwV' , zCwV ) ! MV DEBUG |
---|
| 574 | CALL iom_put( 'zCorU' , zCorU ) ! MV DEBUG |
---|
| 575 | CALL iom_put( 'zCorV' , zCorV ) ! MV DEBUG |
---|
| 576 | |
---|
| 577 | IF( lwp ) WRITE(numout,*) ' outer loop 1f i_out : ', i_out |
---|
| 578 | |
---|
| 579 | ! a priori, Coriolis and drag terms only affect diagonal or independent term of the linear system, |
---|
| 580 | ! so there is no need for lbclnk on drag and coriolis |
---|
| 581 | |
---|
| 582 | !------------------------------------- |
---|
| 583 | ! -- Internal stress RHS contribution |
---|
| 584 | !------------------------------------- |
---|
| 585 | |
---|
| 586 | ! --- Stress contributions at T-points |
---|
| 587 | DO jj = 2, jpj ! loop to jpi,jpj to avoid making a communication for zs1,zs2,zs12 |
---|
| 588 | DO ji = 2, jpi ! |
---|
| 589 | |
---|
| 590 | ! sig1 contribution to RHS of U-equation at T-points |
---|
| 591 | zs1_rhsu(ji,jj) = zzt(ji,jj) * ( e1v(ji,jj) * zv_c(ji,jj) - e1v(ji,jj-1) * zv_c(ji,jj-1) - 1.0_wp ) |
---|
| 592 | |
---|
| 593 | ! sig2 contribution to RHS of U-equation at T-points |
---|
| 594 | zs2_rhsu(ji,jj) = - zet(ji,jj) * ( r1_e1v(ji,jj) * zv_c(ji,jj) - r1_e1v(ji,jj-1) * zv_c(ji,jj-1) ) * e1t(ji,jj) * e1t(ji,jj) |
---|
| 595 | |
---|
| 596 | ! sig1 contribution to RHS of V-equation at T-points |
---|
| 597 | zs1_rhsv(ji,jj) = zzt(ji,jj) * ( e2u(ji,jj) * zu_c(ji,jj) - e2u(ji-1,jj) * zu_c(ji-1,jj) - 1.0_wp ) |
---|
| 598 | |
---|
| 599 | ! sig2 contribution to RHS of V-equation at T-points |
---|
| 600 | zs2_rhsv(ji,jj) = zet(ji,jj) * ( r1_e2u(ji,jj) * zu_c(ji,jj) - r1_e2u(ji-1,jj) * zu_c(ji-1,jj) ) * e2t(ji,jj) * e2t(ji,jj) |
---|
| 601 | |
---|
| 602 | END DO |
---|
| 603 | END DO |
---|
| 604 | |
---|
| 605 | CALL iom_put( 'zs1_rhsu' , zs1_rhsu ) ! MV DEBUG |
---|
| 606 | CALL iom_put( 'zs2_rhsu' , zs2_rhsu ) ! MV DEBUG |
---|
| 607 | CALL iom_put( 'zs1_rhsv' , zs1_rhsv ) ! MV DEBUG |
---|
| 608 | CALL iom_put( 'zs2_rhsv' , zs2_rhsv ) ! MV DEBUG |
---|
| 609 | |
---|
| 610 | ! a priori, no lbclnk, because rhsu is only used in the inner domain |
---|
| 611 | |
---|
| 612 | ! --- Stress contributions at f-points |
---|
| 613 | ! MV NOTE: I applied zfmask on zds, by mimetism on EVP, but without deep understanding of what I was doing |
---|
| 614 | ! My guess is that this is the way to enforce boundary conditions on strain rate tensor |
---|
| 615 | |
---|
| 616 | IF( lwp ) WRITE(numout,*) ' outer loop 2 i_out : ', i_out |
---|
| 617 | |
---|
| 618 | DO jj = 1, jpj - 1 |
---|
| 619 | DO ji = 1, jpi - 1 |
---|
| 620 | |
---|
| 621 | ! sig12 contribution to RHS of U equation at F-points |
---|
| 622 | zs12_rhsu(ji,jj) = - zef(ji,jj) * ( r1_e2v(ji+1,jj) * zv_c(ji+1,jj) - r1_e2v(ji,jj) * zv_c(ji,jj) ) * e2f(ji,jj) * e2f(ji,jj) * zfmask(ji,jj) |
---|
| 623 | |
---|
| 624 | ! sig12 contribution to RHS of V equation at F-points |
---|
| 625 | zs12_rhsv(ji,jj) = zef(ji,jj) * ( r1_e1u(ji,jj+1) * zu_c(ji,jj+1) - r1_e1u(ji,jj) * zu_c(ji,jj) ) * e1f(ji,jj) * e1f(ji,jj) * zfmask(ji,jj) |
---|
| 626 | |
---|
| 627 | END DO |
---|
| 628 | END DO |
---|
| 629 | |
---|
| 630 | CALL lbc_lnk( 'icedyn_rhg_vp', zs12_rhsu, 'F', 1. ) |
---|
| 631 | CALL lbc_lnk( 'icedyn_rhg_vp', zs12_rhsv, 'F', 1. ) |
---|
| 632 | |
---|
| 633 | CALL iom_put( 'zs12_rhsu' , zs12_rhsu ) ! MV DEBUG |
---|
| 634 | CALL iom_put( 'zs12_rhsv' , zs12_rhsv ) ! MV DEBUG |
---|
| 635 | |
---|
| 636 | ! a priori, no lbclnk, because rhsu are only used in the inner domain |
---|
| 637 | |
---|
| 638 | ! --- Internal force contributions to RHS, taken as divergence of stresses (Appendix C of Hunke and Dukowicz, 2002) |
---|
| 639 | ! OPT: merge with next loop and use intermediate scalars for zf_rhsu |
---|
| 640 | |
---|
| 641 | DO jj = 2, jpj - 1 |
---|
| 642 | DO ji = 2, jpi - 1 |
---|
| 643 | ! --- U component of internal force contribution to RHS at U points |
---|
| 644 | zf_rhsu(ji,jj) = 0.5_wp * r1_e1e2u(ji,jj) * & |
---|
| 645 | ( e2u(ji,jj) * ( zs1_rhsu(ji+1,jj) - zs1_rhsu(ji,jj) ) & |
---|
| 646 | & + r1_e2u(ji,jj) * ( e2t(ji+1,jj) * e2t(ji+1,jj) * zs2_rhsu(ji+1,jj) - e2t(ji,jj) * e2t(ji,jj) * zs2_rhsu(ji,jj) ) & |
---|
| 647 | & + 2._wp * r1_e1u(ji,jj) * ( e1f(ji,jj) * e1f(ji,jj) * zs12_rhsu(ji,jj) - e1f(ji,jj-1) * e1f(ji,jj-1) * zs12_rhsu(ji,jj-1) ) ) |
---|
| 648 | |
---|
| 649 | ! --- V component of internal force contribution to RHS at V points |
---|
| 650 | zf_rhsv(ji,jj) = 0.5_wp * r1_e1e2v(ji,jj) * & |
---|
| 651 | & ( e1v(ji,jj) * ( zs1_rhsv(ji,jj+1) - zs1_rhsv(ji,jj) ) & |
---|
| 652 | & + r1_e1v(ji,jj) * ( e1t(ji,jj+1) * e1t(ji,jj+1) * zs2_rhsv(ji,jj+1) - e1t(ji,jj) * e1t(ji,jj) * zs2_rhsv(ji,jj) ) & |
---|
| 653 | & + 2._wp * r1_e2v(ji,jj) * ( e2f(ji,jj) * e2f(ji,jj) * zs12_rhsv(ji,jj) - e2f(ji-1,jj) * e2f(ji-1,jj) * zs12_rhsv(ji-1,jj) ) ) |
---|
| 654 | |
---|
| 655 | END DO |
---|
| 656 | END DO |
---|
| 657 | |
---|
| 658 | CALL iom_put( 'zf_rhsu' , zf_rhsu ) ! MV DEBUG |
---|
| 659 | CALL iom_put( 'zf_rhsv' , zf_rhsv ) ! MV DEBUG |
---|
| 660 | |
---|
| 661 | !--------------------------- |
---|
| 662 | ! -- Sum RHS contributions |
---|
| 663 | !--------------------------- |
---|
| 664 | ! |
---|
| 665 | ! OPT: could use intermediate scalars to reduce memory access |
---|
| 666 | DO jj = 2, jpj - 1 |
---|
| 667 | DO ji = 2, jpi - 1 |
---|
| 668 | |
---|
| 669 | ! still miss ice ocean stress and acceleration contribution |
---|
| 670 | zrhsu(ji,jj) = zmU_t(ji,jj) + ztaux_ai(ji,jj) + ztaux_oi_rhsu(ji,jj) + zspgU(ji,jj) + zCorU(ji,jj) + zf_rhsu(ji,jj) |
---|
| 671 | zrhsv(ji,jj) = zmV_t(ji,jj) + ztauy_ai(ji,jj) + ztauy_oi_rhsv(ji,jj) + zspgV(ji,jj) + zCorV(ji,jj) + zf_rhsu(ji,jj) |
---|
| 672 | |
---|
| 673 | END DO |
---|
| 674 | END DO |
---|
| 675 | |
---|
| 676 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zrhsu, 'U', -1., zrhsv, 'V', -1.) |
---|
| 677 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zmU_t, 'U', -1., zmV_t, 'V', -1.) |
---|
| 678 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', ztaux_oi_rhsu, 'U', -1., ztauy_oi_rhsv, 'V', -1.) |
---|
| 679 | |
---|
| 680 | CALL iom_put( 'zmU_t' , zmU_t ) ! MV DEBUG |
---|
| 681 | CALL iom_put( 'zmV_t' , zmV_t ) ! MV DEBUG |
---|
| 682 | CALL iom_put( 'ztaux_oi_rhsu' , ztaux_oi_rhsu ) ! MV DEBUG |
---|
| 683 | CALL iom_put( 'ztauy_oi_rhsv' , ztauy_oi_rhsv ) ! MV DEBUG |
---|
| 684 | CALL iom_put( 'zrhsu' , zrhsu ) ! MV DEBUG |
---|
| 685 | CALL iom_put( 'zrhsv' , zrhsv ) ! MV DEBUG |
---|
| 686 | |
---|
| 687 | ! inner domain calculations -> no lbclnk |
---|
| 688 | |
---|
| 689 | IF( lwp ) WRITE(numout,*) ' outer loop 4 i_out : ', i_out |
---|
| 690 | |
---|
| 691 | !---------------------------------------------------------------------------------------! |
---|
| 692 | ! |
---|
| 693 | ! --- Linear system matrix |
---|
| 694 | ! |
---|
| 695 | !---------------------------------------------------------------------------------------! |
---|
| 696 | |
---|
| 697 | ! Linear system matrix contains all implicit contributions |
---|
| 698 | ! 1) internal forces, 2) acceleration, 3) ice-ocean drag |
---|
| 699 | |
---|
| 700 | ! The linear system equation is written as follows |
---|
| 701 | ! AU * u_{i-1,j} + BU * u_{i,j} + CU * u_{i+1,j} |
---|
| 702 | ! = DU * u_{i,j-1} + EU * u_{i,j+1} + RHS (! my convention, not the same as ZH97 ) |
---|
| 703 | |
---|
| 704 | ! MV Note 1: martin losch applies boundary condition to BU in mitGCM - check whether it is necessary here ? |
---|
| 705 | ! MV Note 2: "T" factor calculations can be optimized by putting things out of the loop |
---|
| 706 | ! only zzt and zet are iteration-dependent, other only depend on scale factors |
---|
| 707 | |
---|
| 708 | DO ji = 2, jpi - 1 ! internal domain do loop |
---|
| 709 | DO jj = 2, jpj - 1 |
---|
| 710 | |
---|
| 711 | !------------------------------------- |
---|
| 712 | ! -- Internal forces LHS contribution |
---|
| 713 | !------------------------------------- |
---|
| 714 | ! |
---|
| 715 | ! --- U-component |
---|
| 716 | ! |
---|
| 717 | ! "T" factors (intermediate results) |
---|
| 718 | ! |
---|
| 719 | zfac = 0.5_wp * r1_e1e2u(ji,jj) |
---|
| 720 | zfac1 = zfac * e2u(ji,jj) |
---|
| 721 | zfac2 = zfac * r1_e2u(ji,jj) |
---|
| 722 | zfac3 = 2._wp * zfac * r1_e1u(ji,jj) |
---|
| 723 | |
---|
| 724 | zt12U = - zfac1 * zzt(ji+1,jj) |
---|
| 725 | zt11U = zfac1 * zzt(ji,jj) |
---|
| 726 | |
---|
| 727 | zt22U = - zfac2 * zet(ji+1,jj) * e2t(ji+1,jj) * e2t(ji+1,jj) * e2t(ji+1,jj) * e2t(ji+1,jj) |
---|
| 728 | zt21U = zfac2 * zet(ji,jj) * e2t(ji,jj) * e2t(ji,jj) * e2t(ji,jj) * e2t(ji,jj) |
---|
| 729 | |
---|
| 730 | zt122U = - zfac3 * zef(ji,jj) * e1f(ji,jj) * e1f(ji,jj) * e1f(ji,jj) * e1f(ji,jj) |
---|
| 731 | zt121U = zfac3 * zef(ji,jj-1) * e1f(ji,jj-1) * e1f(ji,jj-1) * e1f(ji,jj-1) * e1f(ji,jj-1) |
---|
| 732 | |
---|
| 733 | ! |
---|
| 734 | ! Linear system coefficients |
---|
| 735 | ! |
---|
| 736 | zAU(ji,jj) = - zt11U * e2u(ji-1,jj) - zt21U * r1_e2u(ji-1,jj) |
---|
| 737 | zBU(ji,jj) = ( zt12U + zt11U ) * e2u(ji,jj) + ( zt22U + zt21U ) * r1_e2u(ji,jj) + ( zt122U + zt121U ) * r1_e1u(ji,jj) |
---|
| 738 | zCU(ji,jj) = - zt12U * e2u(ji+1,jj) - zt22U * r1_e2u(ji+1,jj) |
---|
| 739 | |
---|
| 740 | zDU(ji,jj) = zt121U * r1_e1u(ji,jj-1) |
---|
| 741 | zEU(ji,jj) = zt122U * r1_e1u(ji,jj+1) |
---|
| 742 | |
---|
| 743 | ! |
---|
| 744 | ! --- V-component |
---|
| 745 | ! |
---|
| 746 | ! "T" factors (intermediate results) |
---|
| 747 | ! |
---|
| 748 | zfac = 0.5_wp * r1_e1e2v(ji,jj) |
---|
| 749 | zfac1 = zfac * e2v(ji,jj) |
---|
| 750 | zfac2 = zfac * r1_e1v(ji,jj) |
---|
| 751 | zfac3 = 2._wp * zfac * r1_e2v(ji,jj) |
---|
| 752 | |
---|
| 753 | zt12V = - zfac1 * zzt(ji,jj+1) |
---|
| 754 | zt11V = zfac1 * zzt(ji,jj) |
---|
| 755 | |
---|
| 756 | zt22V = zfac2 * zet(ji,jj+1) * e1t(ji,jj+1) * e1t(ji,jj+1) * e1t(ji,jj+1) * e1t(ji,jj+1) |
---|
| 757 | zt21V = - zfac2 * zet(ji,jj) * e1t(ji,jj) * e1t(ji,jj) * e1t(ji,jj) * e1t(ji,jj) |
---|
| 758 | |
---|
| 759 | zt122V = zfac3 * zef(ji,jj) * e2f(ji,jj) * e2f(ji,jj) * e2f(ji,jj) * e2f(ji,jj) |
---|
| 760 | zt121V = - zfac3 * zef(ji-1,jj) * e2f(ji-1,jj) * e2f(ji-1,jj) * e2f(ji-1,jj) * e2f(ji-1,jj) |
---|
| 761 | |
---|
| 762 | ! |
---|
| 763 | ! Linear system coefficients |
---|
| 764 | ! |
---|
| 765 | zAV(ji,jj) = - zt11V * e1v(ji,jj-1) + zt21V * r1_e1v(ji,jj-1) |
---|
| 766 | zBV(ji,jj) = ( zt12V + zt11V ) * e1v(ji,jj) - ( zt22V + zt21V ) * r1_e1v(ji,jj) - ( zt122V + zt121V ) * r1_e2v(ji,jj) |
---|
| 767 | zCV(ji,jj) = - zt12V * e1v(ji,jj+1) + zt22V * r1_e1v(ji,jj+1) |
---|
| 768 | |
---|
| 769 | zDV(ji,jj) = - zt121V * r1_e2v(ji-1,jj) ! mistake is in the pdf notes not here |
---|
| 770 | zEV(ji,jj) = - zt122V * r1_e2v(ji+1,jj) |
---|
| 771 | |
---|
| 772 | !----------------------------------------------------- |
---|
| 773 | ! -- Ocean-ice drag and acceleration LHS contribution |
---|
| 774 | !----------------------------------------------------- |
---|
| 775 | zBU(ji,jj) = zBU(ji,jj) + zCwU(ji,jj) + zmassU_t(ji,jj) |
---|
| 776 | zBV(ji,jj) = ZBV(ji,jj) + zCwV(ji,jj) + zmassV_t(ji,jj) |
---|
| 777 | |
---|
| 778 | END DO |
---|
| 779 | END DO |
---|
| 780 | |
---|
| 781 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zAU , 'U', 1., zAV , 'V', 1. ) |
---|
| 782 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zBU , 'U', 1., zBV , 'V', 1. ) |
---|
| 783 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zCU , 'U', 1., zCV , 'V', 1. ) |
---|
| 784 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zDU , 'U', 1., zDV , 'V', 1. ) |
---|
| 785 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zEU , 'U', 1., zEV , 'V', 1. ) |
---|
| 786 | |
---|
| 787 | CALL iom_put( 'zAU' , zAU ) ! MV DEBUG |
---|
| 788 | CALL iom_put( 'zBU' , zBU ) ! MV DEBUG |
---|
| 789 | CALL iom_put( 'zCU' , zCU ) ! MV DEBUG |
---|
| 790 | CALL iom_put( 'zDU' , zDU ) ! MV DEBUG |
---|
| 791 | CALL iom_put( 'zEU' , zEU ) ! MV DEBUG |
---|
| 792 | CALL iom_put( 'zAV' , zAV ) ! MV DEBUG |
---|
| 793 | CALL iom_put( 'zBV' , zBV ) ! MV DEBUG |
---|
| 794 | CALL iom_put( 'zCV' , zCV ) ! MV DEBUG |
---|
| 795 | CALL iom_put( 'zDV' , zDV ) ! MV DEBUG |
---|
| 796 | CALL iom_put( 'zEV' , zEV ) ! MV DEBUG |
---|
| 797 | |
---|
| 798 | !------------------------------------------------------------------------------! |
---|
| 799 | ! |
---|
| 800 | ! --- Inner loop: solve linear system, check convergence |
---|
| 801 | ! |
---|
| 802 | !------------------------------------------------------------------------------! |
---|
| 803 | |
---|
| 804 | ! Inner loop solves the linear problem .. requires 1500 iterations |
---|
| 805 | ll_u_iterate = .TRUE. |
---|
| 806 | ll_v_iterate = .TRUE. |
---|
| 807 | |
---|
[13965] | 808 | DO i_inn = 1, nn_vp_ninn ! inner loop iterations |
---|
[13921] | 809 | |
---|
| 810 | IF( lwp ) WRITE(numout,*) ' inner loop 1 i_inn : ', i_inn |
---|
| 811 | |
---|
| 812 | !--- mitgcm computes initial value of residual here... |
---|
| 813 | |
---|
| 814 | jter = jter + 1 |
---|
| 815 | ! l_full_nf_update = jter == nn_nvp ! false: disable full North fold update (performances) for iter = 1 to nn_nevp-1 |
---|
| 816 | |
---|
| 817 | zu_b(:,:) = u_ice(:,:) ! velocity at previous sub-iterate |
---|
| 818 | zv_b(:,:) = v_ice(:,:) |
---|
| 819 | |
---|
| 820 | ! zAU(:,:) = 0._wp; zBU(:,:) = 0._wp; zCU(:,:) = 0._wp; zDU(:,:) = 0._wp; zEU(:,:) = 0._wp |
---|
| 821 | ! zAV(:,:) = 0._wp; zBV(:,:) = 0._wp; zCV(:,:) = 0._wp; zDV(:,:) = 0._wp; zEV(:,:) = 0._wp |
---|
| 822 | |
---|
| 823 | IF ( ll_u_iterate .OR. ll_v_iterate ) THEN |
---|
| 824 | |
---|
| 825 | ! ---------------------------- ! |
---|
| 826 | IF ( ll_u_iterate ) THEN ! --- Solve for u-velocity --- ! |
---|
| 827 | ! ---------------------------- ! |
---|
| 828 | |
---|
| 829 | ! What follows could be subroutinized... |
---|
| 830 | |
---|
| 831 | ! Thomas Algorithm for tridiagonal solver |
---|
| 832 | ! A*u(i-1,j)+B*u(i,j)+C*u(i+1,j) = F |
---|
| 833 | |
---|
| 834 | zFU(:,:) = 0._wp ; zFU_prime(:,:) = 0._wp ; zBU_prime(:,:) = 0._wp; zCU_prime(:,:) = 0._wp |
---|
| 835 | |
---|
| 836 | DO jn = 1, nn_zebra_vp ! "zebra" loop (! red-black-sor!!! ) |
---|
| 837 | |
---|
| 838 | ! OPT: could be even better optimized with a true red-black SOR |
---|
| 839 | |
---|
| 840 | IF ( jn == 1 ) THEN ; jj_min = 2 |
---|
| 841 | ELSE ; jj_min = 3 |
---|
| 842 | ENDIF |
---|
| 843 | |
---|
| 844 | IF ( lwp ) WRITE(numout,*) ' Into the U-zebra loop at step jn = ', jn, ', with jj_min = ', jj_min |
---|
| 845 | |
---|
| 846 | DO jj = jj_min, jpj - 1, nn_zebra_vp |
---|
| 847 | |
---|
| 848 | !------------------------ |
---|
| 849 | ! Independent term (zFU) |
---|
| 850 | !------------------------ |
---|
| 851 | DO ji = 2, jpi - 1 |
---|
| 852 | |
---|
| 853 | ! boundary condition substitution |
---|
| 854 | ! see Zhang and Hibler, 1997, Appendix B |
---|
| 855 | zAA3 = 0._wp |
---|
| 856 | IF ( ji == 2 ) zAA3 = zAA3 - zAU(ji,jj) * u_ice(ji-1,jj) |
---|
| 857 | IF ( ji == jpi - 1 ) zAA3 = zAA3 - zCU(ji,jj) * u_ice(ji+1,jj) |
---|
| 858 | |
---|
| 859 | ! right hand side |
---|
| 860 | zFU(ji,jj) = ( zrhsu(ji,jj) & ! right-hand side terms |
---|
| 861 | & + zAA3 & ! boundary condition translation |
---|
| 862 | & + zDU(ji,jj) * u_ice(ji,jj-1) & ! internal force, j-1 |
---|
| 863 | & + zEU(ji,jj) * u_ice(ji,jj+1) ) * umask(ji,jj,1) ! internal force, j+1 |
---|
| 864 | |
---|
| 865 | END DO |
---|
| 866 | |
---|
| 867 | END DO |
---|
| 868 | |
---|
| 869 | CALL lbc_lnk( 'icedyn_rhg_vp', zFU, 'U', 1. ) |
---|
| 870 | |
---|
| 871 | !--------------- |
---|
| 872 | ! Forward sweep |
---|
| 873 | !--------------- |
---|
| 874 | DO jj = jj_min, jpj - 1, nn_zebra_vp |
---|
| 875 | |
---|
| 876 | DO ji = 3, jpi - 1 |
---|
| 877 | |
---|
| 878 | zfac = SIGN( 1._wp , zBU(ji-1,jj) ) * MAX( 0._wp , SIGN( 1._wp , ABS( zBU(ji-1,jj) ) - epsi20 ) ) |
---|
| 879 | zw = zfac * zAU(ji,jj) / MAX ( ABS( zBU(ji-1,jj) ) , epsi20 ) |
---|
| 880 | zBU_prime(ji,jj) = zBU(ji,jj) - zw * zCU(ji-1,jj) |
---|
| 881 | zFU_prime(ji,jj) = zFU(ji,jj) - zw * zFU(ji-1,jj) |
---|
| 882 | |
---|
| 883 | END DO |
---|
| 884 | |
---|
| 885 | END DO |
---|
| 886 | |
---|
| 887 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zFU_prime, 'U', 1., zBU_prime, 'U', 1. ) |
---|
| 888 | |
---|
| 889 | !----------------------------- |
---|
| 890 | ! Backward sweep & relaxation |
---|
| 891 | !----------------------------- |
---|
| 892 | |
---|
| 893 | DO jj = jj_min, jpj - 1, nn_zebra_vp |
---|
| 894 | |
---|
| 895 | ! --- Backward sweep |
---|
| 896 | ! last row |
---|
| 897 | zfac = SIGN( 1._wp , zBU_prime(jpi-1,jj) ) * MAX( 0._wp , SIGN( 1._wp , ABS( zBU_prime(jpi-1,jj) ) - epsi20 ) ) |
---|
| 898 | u_ice(jpi-1,jj) = zfac * zFU_prime(jpi-1,jj) / MAX( ABS ( zBU_prime(jpi-1,jj) ) , epsi20 ) & |
---|
| 899 | & * umask(jpi-1,jj,1) |
---|
| 900 | DO ji = jpi-2 , 2, -1 ! all other rows ! ---> original backward loop |
---|
| 901 | zfac = SIGN( 1._wp , zBU_prime(ji,jj) ) * MAX( 0._wp , SIGN( 1._wp , ABS( zBU_prime(ji,jj) ) - epsi20 ) ) |
---|
| 902 | u_ice(ji,jj) = zfac * ( zFU_prime(ji,jj) - zCU(ji,jj) * u_ice(ji+1,jj) ) * umask(ji,jj,1) & |
---|
| 903 | & / MAX ( ABS ( zBU_prime(ji,jj) ) , epsi20 ) |
---|
| 904 | END DO |
---|
| 905 | |
---|
| 906 | !--- Relaxation |
---|
| 907 | ! and velocity masking for little-ice and no-ice cases |
---|
| 908 | DO ji = 2, jpi - 1 |
---|
| 909 | |
---|
[13965] | 910 | u_ice(ji,jj) = zu_b(ji,jj) + zrelaxu_vp * ( u_ice(ji,jj) - zu_b(ji,jj) ) ! relaxation |
---|
[13921] | 911 | |
---|
| 912 | u_ice(ji,jj) = zmsk00x(ji,jj) & ! masking |
---|
| 913 | & * ( zmsk01x(ji,jj) * u_ice(ji,jj) & |
---|
| 914 | & + ( 1._wp - zmsk01x(ji,jj) ) * u_oce(ji,jj) * 0.01_wp ) * umask(ji,jj,1) |
---|
| 915 | |
---|
| 916 | END DO |
---|
| 917 | |
---|
| 918 | END DO ! jj |
---|
| 919 | |
---|
| 920 | END DO ! zebra loop |
---|
| 921 | |
---|
| 922 | ENDIF ! ll_u_iterate |
---|
| 923 | |
---|
| 924 | ! ! ---------------------------- ! |
---|
| 925 | IF ( ll_v_iterate ) THEN ! --- Solve for V-velocity --- ! |
---|
| 926 | ! ! ---------------------------- ! |
---|
| 927 | |
---|
| 928 | ! MV OPT: what follows could be subroutinized... |
---|
| 929 | ! Thomas Algorithm for tridiagonal solver |
---|
| 930 | ! A*v(i,j-1)+B*v(i,j)+C*v(i,j+1) = F |
---|
| 931 | ! It is intentional to have a ji then jj loop for V-velocity |
---|
| 932 | !!! ZH97 explain it is critical for convergence speed |
---|
| 933 | |
---|
| 934 | zFV(:,:) = 0._wp ; zFV_prime(:,:) = 0._wp ; zBV_prime(:,:) = 0._wp; zCV_prime(:,:) = 0._wp |
---|
| 935 | |
---|
| 936 | DO jn = 1, nn_zebra_vp ! "zebra" loop |
---|
| 937 | |
---|
| 938 | IF ( jn == 1 ) THEN ; ji_min = 2 |
---|
| 939 | ELSE ; ji_min = 3 |
---|
| 940 | ENDIF |
---|
| 941 | |
---|
| 942 | IF ( lwp ) WRITE(numout,*) ' Into the V-zebra loop at step jn = ', jn, ', with ji_min = ', ji_min |
---|
| 943 | |
---|
| 944 | DO ji = ji_min, jpi - 1, nn_zebra_vp |
---|
| 945 | |
---|
| 946 | !------------------------ |
---|
| 947 | ! Independent term (zFV) |
---|
| 948 | !------------------------ |
---|
| 949 | DO jj = 2, jpj - 1 |
---|
| 950 | |
---|
| 951 | ! boundary condition substitution (check it is correctly applied !!!) |
---|
| 952 | ! see Zhang and Hibler, 1997, Appendix B |
---|
| 953 | zAA3 = 0._wp |
---|
| 954 | IF ( jj == 2 ) zAA3 = zAA3 - zAV(ji,jj) * v_ice(ji,jj-1) |
---|
| 955 | IF ( jj == jpj - 1 ) zAA3 = zAA3 - zCV(ji,jj) * v_ice(ji,jj+1) |
---|
| 956 | |
---|
| 957 | ! right hand side |
---|
| 958 | zFV(ji,jj) = ( zrhsv(ji,jj) & ! right-hand side terms |
---|
| 959 | & + zAA3 & ! boundary condition translation |
---|
| 960 | & + zDV(ji,jj) * v_ice(ji-1,jj) & ! internal force, j-1 |
---|
| 961 | & + zEV(ji,jj) * v_ice(ji+1,jj) ) * vmask(ji,jj,1) ! internal force, j+1 |
---|
| 962 | |
---|
| 963 | END DO |
---|
| 964 | |
---|
| 965 | END DO |
---|
| 966 | |
---|
| 967 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zFV, 'V', 1.) |
---|
| 968 | |
---|
| 969 | !--------------- |
---|
| 970 | ! Forward sweep |
---|
| 971 | !--------------- |
---|
| 972 | DO ji = ji_min, jpi - 1, nn_zebra_vp |
---|
| 973 | |
---|
| 974 | DO jj = 3, jpj - 1 |
---|
| 975 | |
---|
| 976 | zfac = SIGN( 1._wp , zBV(ji,jj-1) ) * MAX( 0._wp , SIGN( 1._wp , ABS( zBV(ji,jj-1) ) - epsi20 ) ) |
---|
| 977 | zw = zfac * zAV(ji,jj) / MAX ( ABS( zBV(ji,jj-1) ) , epsi20 ) |
---|
| 978 | zBV_prime(ji,jj) = zBV(ji,jj) - zw * zCV(ji,jj-1) |
---|
| 979 | zFV_prime(ji,jj) = zFV(ji,jj) - zw * zFV(ji,jj-1) |
---|
| 980 | |
---|
| 981 | END DO |
---|
| 982 | |
---|
| 983 | END DO |
---|
| 984 | |
---|
| 985 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zFV_prime, 'V', 1., zBV_prime, 'V', 1. ) |
---|
| 986 | |
---|
| 987 | !----------------------------- |
---|
| 988 | ! Backward sweep & relaxation |
---|
| 989 | !----------------------------- |
---|
| 990 | DO ji = ji_min, jpi - 1, nn_zebra_vp |
---|
| 991 | |
---|
| 992 | ! --- Backward sweep |
---|
| 993 | ! last row |
---|
| 994 | zfac = SIGN( 1._wp , zBV_prime(ji,jpj-1) ) * MAX( 0._wp , SIGN( 1._wp , ABS( zBV_prime(ji,jpj-1) ) - epsi20 ) ) |
---|
| 995 | v_ice(ji,jpj-1) = zfac * zFV_prime(ji,jpj-1) / MAX ( ABS(zBV_prime(ji,jpj-1) ) , epsi20 ) & |
---|
| 996 | & * vmask(ji,jpj-1,1) ! last row |
---|
| 997 | |
---|
| 998 | ! other rows |
---|
| 999 | DO jj = jpj-2, 2, -1 ! original back loop |
---|
| 1000 | zfac = SIGN( 1._wp , zBV_prime(ji,jj) ) * MAX( 0._wp , SIGN( 1._wp , ABS( zBV_prime(ji,jj) ) - epsi20 ) ) |
---|
| 1001 | v_ice(ji,jj) = zfac * ( zFV_prime(ji,jj) - zCV(ji,jj) * v_ice(ji,jj+1) ) * vmask(ji,jj,1) & |
---|
| 1002 | & / MAX ( ABS( zBV_prime(ji,jj) ) , epsi20 ) |
---|
| 1003 | END DO |
---|
| 1004 | |
---|
| 1005 | ! --- Relaxation & masking (should it be now or later) |
---|
| 1006 | DO jj = 2, jpj - 1 |
---|
| 1007 | |
---|
[13965] | 1008 | v_ice(ji,jj) = zv_b(ji,jj) + zrelaxv_vp * ( v_ice(ji,jj) - zv_b(ji,jj) ) ! relaxation |
---|
[13921] | 1009 | |
---|
| 1010 | v_ice(ji,jj) = zmsk00y(ji,jj) & ! masking |
---|
| 1011 | & * ( zmsk01y(ji,jj) * v_ice(ji,jj) & |
---|
| 1012 | & + ( 1._wp - zmsk01y(ji,jj) ) * v_oce(ji,jj) * 0.01_wp ) * vmask(ji,jj,1) |
---|
| 1013 | |
---|
| 1014 | END DO ! jj |
---|
| 1015 | |
---|
| 1016 | END DO ! ji |
---|
| 1017 | |
---|
| 1018 | END DO ! zebra loop |
---|
| 1019 | |
---|
| 1020 | ENDIF ! ll_v_iterate |
---|
| 1021 | |
---|
| 1022 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', u_ice, 'U', -1., v_ice, 'V', -1. ) |
---|
| 1023 | |
---|
| 1024 | !-------------------------------------------------------------------------------------- |
---|
| 1025 | ! -- Check convergence based on maximum velocity difference, continue or stop the loop |
---|
| 1026 | !-------------------------------------------------------------------------------------- |
---|
| 1027 | |
---|
| 1028 | !------ |
---|
| 1029 | ! on U |
---|
| 1030 | !------ |
---|
| 1031 | ! MV OPT: if the number of iterations to convergence is really variable, and keep the convergence check |
---|
| 1032 | ! then we must optimize the use of the mpp_max, which is prohibitive |
---|
| 1033 | zuerr_max = 0._wp |
---|
| 1034 | |
---|
[13969] | 1035 | IF ( ll_u_iterate .AND. MOD ( i_inn, nn_vp_chkcvg ) == 0 ) THEN |
---|
[13921] | 1036 | |
---|
| 1037 | ! - Maximum U-velocity difference |
---|
| 1038 | zuerr(:,:) = 0._wp |
---|
| 1039 | DO jj = 2, jpj - 1 |
---|
| 1040 | DO ji = 2, jpi - 1 |
---|
| 1041 | zuerr(ji,jj) = ABS ( ( u_ice(ji,jj) - zu_b(ji,jj) ) ) * umask(ji,jj,1) |
---|
| 1042 | END DO |
---|
| 1043 | END DO |
---|
| 1044 | zuerr_max = MAXVAL( zuerr ) |
---|
| 1045 | CALL mpp_max( 'icedyn_rhg_evp', zuerr_max ) ! max over the global domain - damned! |
---|
| 1046 | |
---|
| 1047 | ! - Stop if error is too large ("safeguard against bad forcing" of original Zhang routine) |
---|
[13965] | 1048 | IF ( i_inn > 1 .AND. zuerr_max > zuerr_max_vp ) THEN |
---|
[13921] | 1049 | IF ( lwp ) WRITE(numout,*) " VP rheology error was too large : ", zuerr_max, " in outer U-iteration ", i_out, " after ", i_inn, " iterations, we stopped " |
---|
| 1050 | ll_u_iterate = .FALSE. |
---|
| 1051 | ENDIF |
---|
| 1052 | |
---|
| 1053 | ! - Stop if error small enough |
---|
[13965] | 1054 | IF ( zuerr_max < zuerr_min_vp ) THEN |
---|
[13921] | 1055 | IF ( lwp ) WRITE(numout,*) " VP rheology nicely done in outer U-iteration ", i_out, " after ", i_inn, " iterations, finished! " |
---|
| 1056 | ll_u_iterate = .FALSE. |
---|
| 1057 | ENDIF |
---|
| 1058 | |
---|
| 1059 | ENDIF ! ll_u_iterate |
---|
| 1060 | |
---|
| 1061 | !------ |
---|
| 1062 | ! on V |
---|
| 1063 | !------ |
---|
| 1064 | zverr_max = 0._wp |
---|
| 1065 | |
---|
[13969] | 1066 | IF ( ll_v_iterate .AND. MOD ( i_inn, nn_vp_chkcvg ) == 0 ) THEN |
---|
[13921] | 1067 | |
---|
| 1068 | ! - Maximum V-velocity difference |
---|
| 1069 | zverr(:,:) = 0._wp |
---|
| 1070 | DO jj = 2, jpj - 1 |
---|
| 1071 | DO ji = 2, jpi - 1 |
---|
| 1072 | zverr(ji,jj) = ABS ( ( v_ice(ji,jj) - zv_b(ji,jj) ) ) * vmask(ji,jj,1) |
---|
| 1073 | END DO |
---|
| 1074 | END DO |
---|
| 1075 | |
---|
| 1076 | zverr_max = MAXVAL( zverr ) |
---|
| 1077 | CALL mpp_max( 'icedyn_rhg_evp', zverr_max ) ! max over the global domain - damned! |
---|
| 1078 | |
---|
| 1079 | ! - Stop if error is too large ("safeguard against bad forcing" of original Zhang routine) |
---|
[13965] | 1080 | IF ( i_inn > 1 .AND. zverr_max > zuerr_max_vp ) THEN |
---|
[13921] | 1081 | IF ( lwp ) WRITE(numout,*) " VP rheology error was too large : ", zverr_max, " in outer V-iteration ", i_out, " after ", i_inn, " iterations, we stopped " |
---|
| 1082 | ll_v_iterate = .FALSE. |
---|
| 1083 | ENDIF |
---|
| 1084 | |
---|
| 1085 | ! - Stop if error small enough |
---|
[13965] | 1086 | IF ( zverr_max < zuerr_min_vp ) THEN |
---|
[13921] | 1087 | IF ( lwp ) WRITE(numout,*) " VP rheology nicely done in outer V-iteration ", i_out, " after ", i_inn, " iterations, finished! " |
---|
| 1088 | ll_v_iterate = .FALSE. |
---|
| 1089 | ENDIF |
---|
| 1090 | |
---|
| 1091 | ENDIF ! ll_v_iterate |
---|
| 1092 | |
---|
| 1093 | ENDIF ! --- end ll_u_iterate or ll_v_iterate |
---|
| 1094 | |
---|
| 1095 | !--------------------------------------------------------------------------------------- |
---|
| 1096 | ! |
---|
| 1097 | ! --- Calculate extra convergence diagnostics and save them |
---|
| 1098 | ! |
---|
| 1099 | !--------------------------------------------------------------------------------------- |
---|
| 1100 | |
---|
[13969] | 1101 | IF( nn_rhg_chkcvg/=0 .AND. MOD ( i_inn - 1, nn_vp_chkcvg ) == 0 ) CALL rhg_cvg_vp( kt, jter, nn_nvp, u_ice, v_ice, zmt, zuerr_max, zverr_max, zglob_area, & |
---|
[13921] | 1102 | & zrhsu, zAU, zBU, zCU, zDU, zEU, zrhsv, zAV, zBV, zCV, zDV, zEV ) |
---|
| 1103 | |
---|
| 1104 | IF ( lwp ) WRITE(numout,*) ' Done convergence tests ' |
---|
| 1105 | |
---|
| 1106 | END DO ! i_inn, end of inner loop |
---|
| 1107 | |
---|
| 1108 | END DO ! End of outer loop (i_out) ============================================================================================= |
---|
| 1109 | |
---|
| 1110 | IF ( lwp ) WRITE(numout,*) ' We are out of outer loop ' |
---|
| 1111 | |
---|
| 1112 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zFU , 'U', 1., zFV , 'V', 1. ) |
---|
| 1113 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zBU_prime , 'U', 1., zBV_prime , 'V', 1. ) |
---|
| 1114 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zFU_prime , 'U', 1., zFV_prime , 'V', 1. ) |
---|
| 1115 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zCU_prime , 'U', 1., zCV_prime , 'V', 1. ) |
---|
| 1116 | |
---|
| 1117 | CALL iom_put( 'zFU' , zFU ) ! MV DEBUG |
---|
| 1118 | CALL iom_put( 'zBU_prime' , zBU_prime ) ! MV DEBUG |
---|
| 1119 | CALL iom_put( 'zCU_prime' , zCU_prime ) ! MV DEBUG |
---|
| 1120 | CALL iom_put( 'zFU_prime' , zFU_prime ) ! MV DEBUG |
---|
| 1121 | |
---|
| 1122 | CALL iom_put( 'zFV' , zFV ) ! MV DEBUG |
---|
| 1123 | CALL iom_put( 'zBV_prime' , zBV_prime ) ! MV DEBUG |
---|
| 1124 | CALL iom_put( 'zCV_prime' , zCV_prime ) ! MV DEBUG |
---|
| 1125 | CALL iom_put( 'zFV_prime' , zFV_prime ) ! MV DEBUG |
---|
| 1126 | |
---|
| 1127 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', u_ice, 'U', -1., v_ice, 'V', -1. ) |
---|
| 1128 | |
---|
| 1129 | IF ( lwp ) WRITE(numout,*) ' We are about to output uice_dbg ' |
---|
| 1130 | IF( iom_use('uice_dbg' ) ) CALL iom_put( 'uice_dbg' , u_ice ) ! ice velocity u after solver |
---|
| 1131 | IF( iom_use('vice_dbg' ) ) CALL iom_put( 'vice_dbg' , v_ice ) ! ice velocity v after solver |
---|
| 1132 | |
---|
| 1133 | !------------------------------------------------------------------------------! |
---|
| 1134 | ! |
---|
| 1135 | ! --- Convergence diagnostics |
---|
| 1136 | ! |
---|
| 1137 | !------------------------------------------------------------------------------! |
---|
| 1138 | |
---|
[13967] | 1139 | IF( nn_rhg_chkcvg /= 0 ) THEN |
---|
[13921] | 1140 | |
---|
| 1141 | IF( iom_use('uice_cvg') ) THEN |
---|
| 1142 | CALL iom_put( 'uice_cvg', MAX( ABS( u_ice(:,:) - zu_b(:,:) ) * umask(:,:,1) , & ! ice velocity difference at last iteration |
---|
| 1143 | & ABS( v_ice(:,:) - zv_b(:,:) ) * vmask(:,:,1) ) * zmsk15(:,:) ) |
---|
| 1144 | ENDIF |
---|
| 1145 | |
---|
[13967] | 1146 | ENDIF |
---|
[13921] | 1147 | |
---|
| 1148 | ! MV DEBUG test - replace ice velocity by ocean current to give the model the means to go ahead |
---|
| 1149 | DO jj = 2, jpj - 1 |
---|
| 1150 | DO ji = 2, jpi - 1 |
---|
| 1151 | |
---|
| 1152 | u_ice(ji,jj) = zmsk00x(ji,jj) & |
---|
| 1153 | & * ( zmsk01x(ji,jj) * u_oce(ji,jj) * 0.01_wp & |
---|
| 1154 | + ( 1._wp - zmsk01x(ji,jj) ) * u_oce(ji,jj) * 0.01_wp ) |
---|
| 1155 | |
---|
| 1156 | v_ice(ji,jj) = zmsk00y(ji,jj) & |
---|
| 1157 | & * ( zmsk01y(ji,jj) * v_oce(ji,jj) * 0.01_wp & |
---|
| 1158 | + ( 1._wp - zmsk01y(ji,jj) ) * v_oce(ji,jj) * 0.01_wp ) |
---|
| 1159 | |
---|
| 1160 | END DO |
---|
| 1161 | END DO |
---|
| 1162 | |
---|
| 1163 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', u_ice, 'U', -1., v_ice, 'V', -1. ) |
---|
| 1164 | |
---|
| 1165 | IF ( lwp ) WRITE(numout,*) ' Velocity replaced ' |
---|
| 1166 | |
---|
| 1167 | ! END DEBUG |
---|
| 1168 | |
---|
| 1169 | !------------------------------------------------------------------------------! |
---|
| 1170 | ! |
---|
| 1171 | ! --- Recompute delta, shear and div (inputs for mechanical redistribution) |
---|
| 1172 | ! |
---|
| 1173 | !------------------------------------------------------------------------------! |
---|
| 1174 | ! |
---|
| 1175 | ! MV OPT: subroutinize ? |
---|
| 1176 | |
---|
| 1177 | DO jj = 1, jpj - 1 |
---|
| 1178 | DO ji = 1, jpi - 1 |
---|
| 1179 | |
---|
| 1180 | ! shear at F points |
---|
| 1181 | zds(ji,jj) = ( ( u_ice(ji,jj+1) * r1_e1u(ji,jj+1) - u_ice(ji,jj) * r1_e1u(ji,jj) ) * e1f(ji,jj) * e1f(ji,jj) & |
---|
| 1182 | & + ( v_ice(ji+1,jj) * r1_e2v(ji+1,jj) - v_ice(ji,jj) * r1_e2v(ji,jj) ) * e2f(ji,jj) * e2f(ji,jj) & |
---|
| 1183 | & ) * r1_e1e2f(ji,jj) * zfmask(ji,jj) |
---|
| 1184 | |
---|
| 1185 | END DO |
---|
| 1186 | END DO |
---|
| 1187 | |
---|
| 1188 | DO jj = 2, jpj - 1 |
---|
| 1189 | DO ji = 2, jpi - 1 ! |
---|
| 1190 | |
---|
| 1191 | ! tension**2 at T points |
---|
| 1192 | zdt = ( ( u_ice(ji,jj) * r1_e2u(ji,jj) - u_ice(ji-1,jj) * r1_e2u(ji-1,jj) ) * e2t(ji,jj) * e2t(ji,jj) & |
---|
| 1193 | & - ( v_ice(ji,jj) * r1_e1v(ji,jj) - v_ice(ji,jj-1) * r1_e1v(ji,jj-1) ) * e1t(ji,jj) * e1t(ji,jj) & |
---|
| 1194 | & ) * r1_e1e2t(ji,jj) |
---|
| 1195 | zdt2 = zdt * zdt |
---|
| 1196 | |
---|
| 1197 | zten_i(ji,jj) = zdt |
---|
| 1198 | |
---|
| 1199 | ! shear**2 at T points (doc eq. A16) |
---|
| 1200 | zds2 = ( zds(ji,jj ) * zds(ji,jj ) * e1e2f(ji,jj ) + zds(ji-1,jj ) * zds(ji-1,jj ) * e1e2f(ji-1,jj ) & |
---|
| 1201 | & + zds(ji,jj-1) * zds(ji,jj-1) * e1e2f(ji,jj-1) + zds(ji-1,jj-1) * zds(ji-1,jj-1) * e1e2f(ji-1,jj-1) & |
---|
| 1202 | & ) * 0.25_wp * r1_e1e2t(ji,jj) |
---|
| 1203 | |
---|
| 1204 | ! shear at T points |
---|
| 1205 | pshear_i(ji,jj) = SQRT( zdt2 + zds2 ) |
---|
| 1206 | |
---|
| 1207 | ! divergence at T points |
---|
| 1208 | pdivu_i(ji,jj) = ( e2u(ji,jj) * u_ice(ji,jj) - e2u(ji-1,jj) * u_ice(ji-1,jj) & |
---|
| 1209 | & + e1v(ji,jj) * v_ice(ji,jj) - e1v(ji,jj-1) * v_ice(ji,jj-1) & |
---|
| 1210 | & ) * r1_e1e2t(ji,jj) |
---|
| 1211 | |
---|
| 1212 | ! delta at T points |
---|
| 1213 | zdelta = SQRT( pdivu_i(ji,jj) * pdivu_i(ji,jj) + ( zdt2 + zds2 ) * z1_ecc2 ) |
---|
| 1214 | rswitch = 1._wp - MAX( 0._wp, SIGN( 1._wp, -zdelta ) ) ! 0 if delta=0 |
---|
| 1215 | |
---|
| 1216 | !pdelta_i(ji,jj) = zdelta + rn_creepl * rswitch |
---|
| 1217 | pdelta_i(ji,jj) = zdelta + rn_creepl |
---|
| 1218 | |
---|
| 1219 | END DO |
---|
| 1220 | END DO |
---|
| 1221 | |
---|
| 1222 | IF ( lwp ) WRITE(numout,*) ' Deformation recalculated ' |
---|
| 1223 | |
---|
| 1224 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', pshear_i, 'T', 1., pdivu_i, 'T', 1., pdelta_i, 'T', 1. ) |
---|
| 1225 | |
---|
| 1226 | !------------------------------------------------------------------------------! |
---|
| 1227 | ! |
---|
| 1228 | ! --- Diagnostics |
---|
| 1229 | ! |
---|
| 1230 | !------------------------------------------------------------------------------! |
---|
| 1231 | ! |
---|
| 1232 | ! MV OPT: subroutinize ? |
---|
| 1233 | ! |
---|
| 1234 | !---------------------------------- |
---|
| 1235 | ! --- Recompute stresses if needed |
---|
| 1236 | !---------------------------------- |
---|
| 1237 | ! |
---|
| 1238 | ! ---- Sea ice stresses at T-points |
---|
| 1239 | IF ( iom_use('normstr') .OR. iom_use('sheastr') .OR. iom_use('intstrx') .OR. iom_use('intstry') ) THEN |
---|
| 1240 | |
---|
| 1241 | DO jj = 2, jpj - 1 |
---|
| 1242 | DO ji = 2, jpi - 1 |
---|
| 1243 | zp_deltastar_t(ji,jj) = strength(ji,jj) / pdelta_i(ji,jj) |
---|
| 1244 | zfac = zp_deltastar_t(ji,jj) |
---|
| 1245 | zs1(ji,jj) = zfac * ( pdivu_i(ji,jj) - pdelta_i(ji,jj) ) |
---|
| 1246 | zs2(ji,jj) = zfac * z1_ecc2 * zten_i(ji,jj) |
---|
| 1247 | zs12(ji,jj) = zfac * z1_ecc2 * pshear_i(ji,jj) |
---|
| 1248 | END DO |
---|
| 1249 | END DO |
---|
| 1250 | |
---|
| 1251 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zs1, 'T', 1., zs2, 'T', 1., zs12, 'T', 1. ) |
---|
| 1252 | |
---|
| 1253 | ENDIF |
---|
| 1254 | |
---|
| 1255 | ! ---- s12 at F-points |
---|
| 1256 | IF ( iom_use('intstrx') .OR. iom_use('intstry') ) THEN |
---|
| 1257 | |
---|
| 1258 | DO jj = 1, jpj - 1 |
---|
| 1259 | DO ji = 1, jpi - 1 |
---|
| 1260 | |
---|
| 1261 | ! P/delta* at F points |
---|
| 1262 | zp_deltastar_f = 0.25_wp * ( zp_deltastar_t(ji,jj) + zp_deltastar_t(ji+1,jj) + zp_deltastar_t(ji,jj+1) + zp_deltastar_t(ji+1,jj+1) ) |
---|
| 1263 | |
---|
| 1264 | ! s12 at F-points |
---|
| 1265 | zs12f(ji,jj) = zp_deltastar_f * z1_ecc2 * zds(ji,jj) |
---|
| 1266 | |
---|
| 1267 | END DO |
---|
| 1268 | END DO |
---|
| 1269 | |
---|
| 1270 | CALL lbc_lnk( 'icedyn_rhg_vp', zs12f, 'F', 1. ) |
---|
| 1271 | |
---|
| 1272 | ENDIF |
---|
| 1273 | |
---|
| 1274 | IF ( lwp ) WRITE(numout,*) ' zs12f recalculated ' |
---|
| 1275 | |
---|
| 1276 | ! |
---|
| 1277 | !----------------------- |
---|
| 1278 | ! --- Store diagnostics |
---|
| 1279 | !----------------------- |
---|
| 1280 | ! |
---|
| 1281 | ! --- Ice-ocean, ice-atm. & ice-ocean bottom (landfast) stresses --- ! |
---|
| 1282 | IF( iom_use('utau_oi') .OR. iom_use('vtau_oi') .OR. iom_use('utau_ai') .OR. iom_use('vtau_ai') .OR. & |
---|
| 1283 | & iom_use('utau_bi') .OR. iom_use('vtau_bi') ) THEN |
---|
| 1284 | |
---|
| 1285 | ALLOCATE( ztaux_oi(jpi,jpj) , ztauy_oi(jpi,jpj) ) |
---|
| 1286 | |
---|
| 1287 | !--- Recalculate oceanic stress at last inner iteration |
---|
| 1288 | DO jj = 2, jpj - 1 |
---|
| 1289 | DO ji = 2, jpi - 1 |
---|
| 1290 | |
---|
| 1291 | !--- ice u-velocity @V points, v-velocity @U points (for non-linear drag computation) |
---|
| 1292 | zu_cV = 0.25_wp * ( u_ice(ji,jj) + u_ice(ji-1,jj) + u_ice(ji,jj+1) + u_ice(ji-1,jj+1) ) * vmask(ji,jj,1) |
---|
| 1293 | zv_cU = 0.25_wp * ( v_ice(ji,jj) + v_ice(ji,jj-1) + v_ice(ji+1,jj) + v_ice(ji+1,jj-1) ) * umask(ji,jj,1) |
---|
| 1294 | |
---|
| 1295 | !--- non-linear drag coefficients (need to be updated at each outer loop, see Lemieux and Tremblay JGR09, p.3, beginning of Section 3) |
---|
| 1296 | zCwU(ji,jj) = za_iU(ji,jj) * zrhoco * SQRT( ( u_ice(ji,jj) - u_oce (ji,jj) ) * ( u_ice(ji,jj) - u_oce (ji,jj) ) & |
---|
| 1297 | & + ( zv_cU - v_oceU(ji,jj) ) * ( zv_cU - v_oceU(ji,jj) ) ) |
---|
| 1298 | zCwV(ji,jj) = za_iV(ji,jj) * zrhoco * SQRT( ( v_ice(ji,jj) - v_oce (ji,jj) ) * ( v_ice(ji,jj) - v_oce (ji,jj) ) & |
---|
| 1299 | & + ( zu_cV - u_oceV(ji,jj) ) * ( zu_cV - u_oceV(ji,jj) ) ) |
---|
| 1300 | |
---|
| 1301 | !--- Ocean-ice stress |
---|
| 1302 | ztaux_oi(ji,jj) = zCwU(ji,jj) * ( u_oce(ji,jj) - u_ice(ji,jj) ) |
---|
| 1303 | ztauy_oi(ji,jj) = zCwV(ji,jj) * ( v_oce(ji,jj) - v_ice(ji,jj) ) |
---|
| 1304 | |
---|
| 1305 | END DO |
---|
| 1306 | END DO |
---|
| 1307 | |
---|
| 1308 | ! |
---|
| 1309 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', ztaux_oi, 'U', -1., ztauy_oi, 'V', -1., ztaux_ai, 'U', -1., ztauy_ai, 'V', -1. ) !, & |
---|
| 1310 | ! & ztaux_bi, 'U', -1., ztauy_bi, 'V', -1. ) |
---|
| 1311 | ! |
---|
| 1312 | CALL iom_put( 'utau_oi' , ztaux_oi * zmsk00 ) |
---|
| 1313 | CALL iom_put( 'vtau_oi' , ztauy_oi * zmsk00 ) |
---|
| 1314 | CALL iom_put( 'utau_ai' , ztaux_ai * zmsk00 ) |
---|
| 1315 | CALL iom_put( 'vtau_ai' , ztauy_ai * zmsk00 ) |
---|
| 1316 | ! CALL iom_put( 'utau_bi' , ztaux_bi * zmsk00 ) |
---|
| 1317 | ! CALL iom_put( 'vtau_bi' , ztauy_bi * zmsk00 ) |
---|
| 1318 | |
---|
| 1319 | DEALLOCATE( ztaux_oi , ztauy_oi ) |
---|
| 1320 | |
---|
| 1321 | ENDIF |
---|
| 1322 | |
---|
| 1323 | ! --- Divergence, shear and strength --- ! |
---|
| 1324 | IF( iom_use('icediv') ) CALL iom_put( 'icediv' , pdivu_i * zmsk00 ) ! divergence |
---|
| 1325 | IF( iom_use('iceshe') ) CALL iom_put( 'iceshe' , pshear_i * zmsk00 ) ! shear |
---|
| 1326 | IF( iom_use('icedlt') ) CALL iom_put( 'icedlt' , pdelta_i * zmsk00 ) ! delta |
---|
| 1327 | IF( iom_use('icestr') ) CALL iom_put( 'icestr' , strength * zmsk00 ) ! strength |
---|
| 1328 | |
---|
| 1329 | IF ( lwp ) WRITE(numout,*) 'Some terms recalculated ' |
---|
| 1330 | |
---|
| 1331 | ! --- Stress tensor invariants (SIMIP diags) --- ! |
---|
| 1332 | IF( iom_use('normstr') .OR. iom_use('sheastr') ) THEN |
---|
| 1333 | ! |
---|
| 1334 | ! Stress tensor invariants (normal and shear stress N/m) - SIMIP diags. |
---|
| 1335 | ! Definitions following Coon (1974) and Feltham (2008) |
---|
| 1336 | ! |
---|
| 1337 | ! sigma1, sigma2, sigma12 are useful (Hunke and Dukowicz MWR 2002, Bouillon et al., OM2013) |
---|
| 1338 | ! however these are NOT stress tensor components, neither stress invariants, nor stress principal components |
---|
| 1339 | ! |
---|
| 1340 | ALLOCATE( zsig_I(jpi,jpj) , zsig_II(jpi,jpj) ) |
---|
| 1341 | ! |
---|
| 1342 | DO jj = 2, jpj - 1 |
---|
| 1343 | DO ji = 2, jpi - 1 |
---|
| 1344 | ! Stress invariants |
---|
| 1345 | zsig_I(ji,jj) = zs1(ji,jj) * 0.5_wp ! 1st invariant, aka average normal stress aka negative pressure |
---|
| 1346 | zsig_II(ji,jj) = SQRT ( zs2(ji,jj) * zs2(ji,jj) * 0.25_wp + zs12(ji,jj) ) ! 2nd invariant, aka maximum shear stress |
---|
| 1347 | END DO |
---|
| 1348 | END DO |
---|
| 1349 | |
---|
| 1350 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zsig_I, 'T', 1., zsig_II, 'T', 1.) |
---|
| 1351 | |
---|
| 1352 | IF( iom_use('normstr') ) CALL iom_put( 'normstr' , zsig_I(:,:) * zmsk00(:,:) ) ! Normal stress |
---|
| 1353 | IF( iom_use('sheastr') ) CALL iom_put( 'sheastr' , zsig_II(:,:) * zmsk00(:,:) ) ! Maximum shear stress |
---|
| 1354 | |
---|
| 1355 | DEALLOCATE ( zsig_I, zsig_II ) |
---|
| 1356 | |
---|
| 1357 | ENDIF |
---|
| 1358 | |
---|
| 1359 | IF ( lwp ) WRITE(numout,*) 'SIMIP work done' |
---|
| 1360 | |
---|
| 1361 | ! --- Normalized stress tensor principal components --- ! |
---|
| 1362 | ! These are used to plot the normalized yield curve (Lemieux & Dupont, GMD 2020) |
---|
| 1363 | ! To plot the yield curve and evaluate physical convergence, they have two recommendations |
---|
| 1364 | ! Recommendation 1 : Use ice strength, not replacement pressure |
---|
| 1365 | ! Recommendation 2 : Need to use deformations at PREVIOUS iterate for viscosities (see p. 1765) |
---|
| 1366 | ! R2 means we need to recompute stresses |
---|
| 1367 | |
---|
| 1368 | IF( iom_use('sig1_pnorm') .OR. iom_use('sig2_pnorm') ) THEN |
---|
| 1369 | ! |
---|
| 1370 | ALLOCATE( zsig1_p(jpi,jpj) , zsig2_p(jpi,jpj) , zsig_I(jpi,jpj) , zsig_II(jpi,jpj) ) |
---|
| 1371 | ! |
---|
| 1372 | DO jj = 2, jpj - 1 |
---|
| 1373 | DO ji = 2, jpi - 1 |
---|
| 1374 | ! Ice stresses computed with **viscosities** (delta, p/delta) at **previous** iterates |
---|
| 1375 | ! and **deformations** at current iterates |
---|
| 1376 | ! following Lemieux & Dupont (2020) |
---|
| 1377 | zfac = zp_deltastar_t(ji,jj) |
---|
| 1378 | zsig1 = zfac * ( pdivu_i(ji,jj) - zdeltastar_t(ji,jj) ) |
---|
| 1379 | zsig1 = 0._wp !!! FUCKING DEBUG TEST !!! |
---|
| 1380 | zsig2 = zfac * z1_ecc2 * zten_i(ji,jj) |
---|
| 1381 | zsig12 = zfac * z1_ecc2 * pshear_i(ji,jj) |
---|
| 1382 | |
---|
| 1383 | ! Stress invariants (sigma_I, sigma_II, Coon 1974, Feltham 2008), T-point |
---|
| 1384 | zsig_I(ji,jj) = zsig1 * 0.5_wp ! 1st invariant |
---|
| 1385 | zsig_II(ji,jj) = SQRT ( zsig2 * zsig2 * 0.25_wp + zsig12 ) ! 2nd invariant |
---|
| 1386 | |
---|
| 1387 | ! Normalized principal stresses (used to display the ellipse) |
---|
| 1388 | z1_strength = 1._wp / MAX ( 1._wp , strength(ji,jj) ) |
---|
| 1389 | zsig1_p(ji,jj) = ( zsig_I(ji,jj) + zsig_II(ji,jj) ) * z1_strength |
---|
| 1390 | zsig2_p(ji,jj) = ( zsig_I(ji,jj) - zsig_II(ji,jj) ) * z1_strength |
---|
| 1391 | END DO |
---|
| 1392 | END DO |
---|
| 1393 | IF ( lwp ) WRITE(numout,*) 'Some shitty stress work done' |
---|
| 1394 | ! |
---|
| 1395 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zsig1_p, 'T', 1., zsig2_p, 'T', 1.) |
---|
| 1396 | ! |
---|
| 1397 | IF ( lwp ) WRITE(numout,*) ' Beauaaaarflblbllll ' |
---|
| 1398 | ! |
---|
| 1399 | CALL iom_put( 'sig1_pnorm' , zsig1_p ) |
---|
| 1400 | CALL iom_put( 'sig2_pnorm' , zsig2_p ) |
---|
| 1401 | |
---|
| 1402 | DEALLOCATE( zsig1_p , zsig2_p , zsig_I , zsig_II ) |
---|
| 1403 | |
---|
| 1404 | IF ( lwp ) WRITE(numout,*) ' So what ??? ' |
---|
| 1405 | |
---|
| 1406 | ENDIF |
---|
| 1407 | |
---|
| 1408 | ! --- SIMIP, terms of tendency for momentum equation --- ! |
---|
| 1409 | IF( iom_use('dssh_dx') .OR. iom_use('dssh_dy') .OR. & |
---|
| 1410 | & iom_use('corstrx') .OR. iom_use('corstry') ) THEN |
---|
| 1411 | |
---|
| 1412 | ! --- Recalculate Coriolis stress at last inner iteration |
---|
| 1413 | DO jj = 2, jpj - 1 |
---|
| 1414 | DO ji = 2, jpi - 1 |
---|
| 1415 | ! --- U-component |
---|
| 1416 | zCorU(ji,jj) = 0.25_wp * r1_e1u(ji,jj) * & |
---|
| 1417 | & ( zmf(ji ,jj) * ( e1v(ji ,jj) * v_ice(ji ,jj) + e1v(ji ,jj-1) * v_ice(ji ,jj-1) ) & |
---|
| 1418 | & + zmf(ji+1,jj) * ( e1v(ji+1,jj) * v_ice(ji+1,jj) + e1v(ji+1,jj-1) * v_ice(ji+1,jj-1) ) ) |
---|
| 1419 | zCorV(ji,jj) = - 0.25_wp * r1_e2v(ji,jj) * & |
---|
| 1420 | & ( zmf(ji,jj ) * ( e2u(ji,jj ) * u_ice(ji,jj ) + e2u(ji-1,jj ) * u_ice(ji-1,jj ) ) & |
---|
| 1421 | & + zmf(ji,jj+1) * ( e2u(ji,jj+1) * u_ice(ji,jj+1) + e2u(ji-1,jj+1) * u_ice(ji-1,jj+1) ) ) |
---|
| 1422 | END DO |
---|
| 1423 | END DO |
---|
| 1424 | ! |
---|
| 1425 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zspgU, 'U', -1., zspgV, 'V', -1., & |
---|
| 1426 | & zCorU, 'U', -1., zCorV, 'V', -1. ) |
---|
| 1427 | ! |
---|
| 1428 | CALL iom_put( 'dssh_dx' , zspgU * zmsk00 ) ! Sea-surface tilt term in force balance (x) |
---|
| 1429 | CALL iom_put( 'dssh_dy' , zspgV * zmsk00 ) ! Sea-surface tilt term in force balance (y) |
---|
| 1430 | CALL iom_put( 'corstrx' , zCorU * zmsk00 ) ! Coriolis force term in force balance (x) |
---|
| 1431 | CALL iom_put( 'corstry' , zCorV * zmsk00 ) ! Coriolis force term in force balance (y) |
---|
| 1432 | |
---|
| 1433 | ENDIF |
---|
| 1434 | |
---|
| 1435 | IF ( iom_use('intstrx') .OR. iom_use('intstry') ) THEN |
---|
| 1436 | |
---|
| 1437 | ! Recalculate internal forces (divergence of stress tensor) at last inner iteration |
---|
| 1438 | DO jj = 2, jpj - 1 |
---|
| 1439 | DO ji = 2, jpi - 1 |
---|
| 1440 | zfU(ji,jj) = 0.5_wp * ( ( zs1(ji+1,jj) - zs1(ji,jj) ) * e2u(ji,jj) & |
---|
| 1441 | & + ( zs2(ji+1,jj) * e2t(ji+1,jj) * e2t(ji+1,jj) - zs2(ji,jj) * e2t(ji,jj) * e2t(ji,jj) & |
---|
| 1442 | & ) * r1_e2u(ji,jj) & |
---|
| 1443 | & + ( zs12f(ji,jj) * e1f(ji,jj) * e1f(ji,jj) - zs12f(ji,jj-1) * e1f(ji,jj-1) * e1f(ji,jj-1) & |
---|
| 1444 | & ) * 2._wp * r1_e1u(ji,jj) & |
---|
| 1445 | & ) * r1_e1e2u(ji,jj) |
---|
| 1446 | zfV(ji,jj) = 0.5_wp * ( ( zs1(ji,jj+1) - zs1(ji,jj) ) * e1v(ji,jj) & |
---|
| 1447 | & - ( zs2(ji,jj+1) * e1t(ji,jj+1) * e1t(ji,jj+1) - zs2(ji,jj) * e1t(ji,jj) * e1t(ji,jj) & |
---|
| 1448 | & ) * r1_e1v(ji,jj) & |
---|
| 1449 | & + ( zs12f(ji,jj) * e2f(ji,jj) * e2f(ji,jj) - zs12f(ji-1,jj) * e2f(ji-1,jj) * e2f(ji-1,jj) & |
---|
| 1450 | & ) * 2._wp * r1_e2v(ji,jj) & |
---|
| 1451 | & ) * r1_e1e2v(ji,jj) |
---|
| 1452 | END DO |
---|
| 1453 | END DO |
---|
| 1454 | |
---|
| 1455 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zfU, 'U', -1., zfV, 'V', -1. ) |
---|
| 1456 | |
---|
| 1457 | CALL iom_put( 'intstrx' , zfU * zmsk00 ) ! Internal force term in force balance (x) |
---|
| 1458 | CALL iom_put( 'intstry' , zfV * zmsk00 ) ! Internal force term in force balance (y) |
---|
| 1459 | |
---|
| 1460 | ENDIF |
---|
| 1461 | |
---|
| 1462 | ! --- Ice & snow mass and ice area transports |
---|
| 1463 | IF( iom_use('xmtrpice') .OR. iom_use('ymtrpice') .OR. & |
---|
| 1464 | & iom_use('xmtrpsnw') .OR. iom_use('ymtrpsnw') .OR. iom_use('xatrp') .OR. iom_use('yatrp') ) THEN |
---|
| 1465 | ! |
---|
| 1466 | ALLOCATE( zdiag_xmtrp_ice(jpi,jpj) , zdiag_ymtrp_ice(jpi,jpj) , & |
---|
| 1467 | & zdiag_xmtrp_snw(jpi,jpj) , zdiag_ymtrp_snw(jpi,jpj) , zdiag_xatrp(jpi,jpj) , zdiag_yatrp(jpi,jpj) ) |
---|
| 1468 | ! |
---|
| 1469 | DO jj = 2, jpj - 1 |
---|
| 1470 | DO ji = 2, jpi - 1 |
---|
| 1471 | ! 2D ice mass, snow mass, area transport arrays (X, Y) |
---|
| 1472 | zfac_x = 0.5 * u_ice(ji,jj) * e2u(ji,jj) * zmsk00(ji,jj) |
---|
| 1473 | zfac_y = 0.5 * v_ice(ji,jj) * e1v(ji,jj) * zmsk00(ji,jj) |
---|
| 1474 | |
---|
| 1475 | zdiag_xmtrp_ice(ji,jj) = rhoi * zfac_x * ( vt_i(ji+1,jj) + vt_i(ji,jj) ) ! ice mass transport, X-component |
---|
| 1476 | zdiag_ymtrp_ice(ji,jj) = rhoi * zfac_y * ( vt_i(ji,jj+1) + vt_i(ji,jj) ) ! '' Y- '' |
---|
| 1477 | |
---|
| 1478 | zdiag_xmtrp_snw(ji,jj) = rhos * zfac_x * ( vt_s(ji+1,jj) + vt_s(ji,jj) ) ! snow mass transport, X-component |
---|
| 1479 | zdiag_ymtrp_snw(ji,jj) = rhos * zfac_y * ( vt_s(ji,jj+1) + vt_s(ji,jj) ) ! '' Y- '' |
---|
| 1480 | |
---|
| 1481 | zdiag_xatrp(ji,jj) = zfac_x * ( at_i(ji+1,jj) + at_i(ji,jj) ) ! area transport, X-component |
---|
| 1482 | zdiag_yatrp(ji,jj) = zfac_y * ( at_i(ji,jj+1) + at_i(ji,jj) ) ! '' Y- '' |
---|
| 1483 | |
---|
| 1484 | END DO |
---|
| 1485 | END DO |
---|
| 1486 | |
---|
| 1487 | CALL lbc_lnk_multi( 'icedyn_rhg_vp', zdiag_xmtrp_ice, 'U', -1., zdiag_ymtrp_ice, 'V', -1., & |
---|
| 1488 | & zdiag_xmtrp_snw, 'U', -1., zdiag_ymtrp_snw, 'V', -1., & |
---|
| 1489 | & zdiag_xatrp , 'U', -1., zdiag_yatrp , 'V', -1. ) |
---|
| 1490 | |
---|
| 1491 | CALL iom_put( 'xmtrpice' , zdiag_xmtrp_ice ) ! X-component of sea-ice mass transport (kg/s) |
---|
| 1492 | CALL iom_put( 'ymtrpice' , zdiag_ymtrp_ice ) ! Y-component of sea-ice mass transport |
---|
| 1493 | CALL iom_put( 'xmtrpsnw' , zdiag_xmtrp_snw ) ! X-component of snow mass transport (kg/s) |
---|
| 1494 | CALL iom_put( 'ymtrpsnw' , zdiag_ymtrp_snw ) ! Y-component of snow mass transport |
---|
| 1495 | CALL iom_put( 'xatrp' , zdiag_xatrp ) ! X-component of ice area transport |
---|
| 1496 | CALL iom_put( 'yatrp' , zdiag_yatrp ) ! Y-component of ice area transport |
---|
| 1497 | |
---|
| 1498 | DEALLOCATE( zdiag_xmtrp_ice , zdiag_ymtrp_ice , & |
---|
| 1499 | & zdiag_xmtrp_snw , zdiag_ymtrp_snw , zdiag_xatrp , zdiag_yatrp ) |
---|
| 1500 | |
---|
| 1501 | ENDIF |
---|
| 1502 | |
---|
| 1503 | DEALLOCATE( zmsk00, zmsk15 ) |
---|
| 1504 | |
---|
| 1505 | END SUBROUTINE ice_dyn_rhg_vp |
---|
| 1506 | |
---|
| 1507 | |
---|
| 1508 | |
---|
| 1509 | SUBROUTINE rhg_cvg_vp( kt, kiter, kitermax, pu, pv, pmt, puerr_max, pverr_max, pglob_area, & |
---|
| 1510 | & prhsu, pAU, pBU, pCU, pDU, pEU, prhsv, pAV, pBV, pCV, pDV, pEV ) |
---|
| 1511 | |
---|
| 1512 | !!---------------------------------------------------------------------- |
---|
| 1513 | !! *** ROUTINE rhg_cvg_vp *** |
---|
| 1514 | !! |
---|
| 1515 | !! ** Purpose : check convergence of VP ice rheology |
---|
| 1516 | !! |
---|
| 1517 | !! ** Method : create a file ice_cvg.nc containing a few convergence diagnostics |
---|
| 1518 | !! This routine is called every sub-iteration, so it is cpu expensive |
---|
| 1519 | !! |
---|
| 1520 | !! Calculates / stores |
---|
| 1521 | !! - maximum absolute U-V difference (uice_cvg, u_dif, v_dif, m/s) |
---|
| 1522 | !! - residuals in U, V and UV-mean taken as square-root of area-weighted mean square residual (u_res, v_res, vel_res, N/m2) |
---|
| 1523 | !! - mean kinetic energy (mke_ice, J/m2) |
---|
| 1524 | !! |
---|
| 1525 | !! ** Note : for the first sub-iteration, uice_cvg is set to 0 (too large otherwise) |
---|
| 1526 | !!---------------------------------------------------------------------- |
---|
| 1527 | INTEGER , INTENT(in) :: kt, kiter, kitermax ! ocean time-step index |
---|
| 1528 | REAL(wp), DIMENSION(:,:), INTENT(in) :: pu, pv, pmt ! now velocity and mass per unit area |
---|
| 1529 | REAL(wp), INTENT(in) :: puerr_max, pverr_max ! absolute mean velocity difference |
---|
| 1530 | REAL(wp), INTENT(in) :: pglob_area ! global ice area |
---|
| 1531 | REAL(wp), DIMENSION(:,:), INTENT(in) :: prhsu, pAU, pBU, pCU, pDU, pEU ! linear system coefficients |
---|
| 1532 | REAL(wp), DIMENSION(:,:), INTENT(in) :: prhsv, pAV, pBV, pCV, pDV, pEV |
---|
| 1533 | !! |
---|
| 1534 | INTEGER :: it, idtime, istatus, ix_dim, iy_dim |
---|
| 1535 | INTEGER :: ji, jj ! dummy loop indices |
---|
| 1536 | REAL(wp) :: zveldif, zu_res_mean, zv_res_mean, zvelres, zmke, zu, zv ! local scalars |
---|
| 1537 | REAL(wp) :: z1_pglob_area |
---|
| 1538 | REAL(wp), DIMENSION(jpi,jpj) :: zu_res, zv_res, zvel2 ! local arrays |
---|
| 1539 | |
---|
| 1540 | CHARACTER(len=20) :: clname |
---|
| 1541 | !!---------------------------------------------------------------------- |
---|
| 1542 | |
---|
| 1543 | IF( lwp ) THEN |
---|
| 1544 | WRITE(numout,*) |
---|
| 1545 | WRITE(numout,*) 'rhg_cvg_vp : ice rheology convergence control' |
---|
| 1546 | WRITE(numout,*) '~~~~~~~~~~~' |
---|
| 1547 | WRITE(numout,*) ' kiter = : ', kiter |
---|
| 1548 | WRITE(numout,*) ' kitermax = : ', kitermax |
---|
| 1549 | ENDIF |
---|
| 1550 | |
---|
| 1551 | ! create file |
---|
| 1552 | IF( kt == nit000 .AND. kiter == 1 ) THEN |
---|
| 1553 | ! |
---|
| 1554 | IF( lwm ) THEN |
---|
| 1555 | |
---|
| 1556 | clname = 'ice_cvg.nc' |
---|
| 1557 | IF( .NOT. Agrif_Root() ) clname = TRIM(Agrif_CFixed())//"_"//TRIM(clname) |
---|
| 1558 | istatus = NF90_CREATE( TRIM(clname), NF90_CLOBBER, ncvgid ) |
---|
| 1559 | |
---|
| 1560 | istatus = NF90_DEF_DIM( ncvgid, 'time' , NF90_UNLIMITED, idtime ) |
---|
| 1561 | istatus = NF90_DEF_DIM( ncvgid, 'x' , jpi, ix_dim ) |
---|
| 1562 | istatus = NF90_DEF_DIM( ncvgid, 'y' , jpj, iy_dim ) |
---|
| 1563 | |
---|
| 1564 | ! i suggest vel_dif instead |
---|
| 1565 | istatus = NF90_DEF_VAR( ncvgid, 'u_res' , NF90_DOUBLE , (/ idtime /), nvarid_ures ) |
---|
| 1566 | istatus = NF90_DEF_VAR( ncvgid, 'v_res' , NF90_DOUBLE , (/ idtime /), nvarid_vres ) |
---|
| 1567 | istatus = NF90_DEF_VAR( ncvgid, 'vel_res', NF90_DOUBLE , (/ idtime /), nvarid_velres ) |
---|
| 1568 | istatus = NF90_DEF_VAR( ncvgid, 'u_dif' , NF90_DOUBLE , (/ idtime /), nvarid_udif ) |
---|
| 1569 | istatus = NF90_DEF_VAR( ncvgid, 'v_dif' , NF90_DOUBLE , (/ idtime /), nvarid_vdif ) |
---|
| 1570 | istatus = NF90_DEF_VAR( ncvgid, 'vel_dif', NF90_DOUBLE , (/ idtime /), nvarid_veldif ) |
---|
| 1571 | istatus = NF90_DEF_VAR( ncvgid, 'mke_ice', NF90_DOUBLE , (/ idtime /), nvarid_mke ) |
---|
| 1572 | |
---|
| 1573 | istatus = NF90_DEF_VAR( ncvgid, 'u_res_xy', NF90_DOUBLE, (/ ix_dim, iy_dim /), nvarid_ures_xy) |
---|
| 1574 | istatus = NF90_DEF_VAR( ncvgid, 'v_res_xy', NF90_DOUBLE, (/ ix_dim, iy_dim /), nvarid_vres_xy) |
---|
| 1575 | |
---|
| 1576 | istatus = NF90_ENDDEF(ncvgid) |
---|
| 1577 | |
---|
| 1578 | ENDIF |
---|
| 1579 | ! |
---|
| 1580 | ENDIF |
---|
| 1581 | |
---|
| 1582 | IF ( lwp ) WRITE(numout,*) ' File created ' |
---|
| 1583 | |
---|
| 1584 | ! --- Max absolute velocity difference with previous iterate (zveldif) |
---|
| 1585 | zveldif = MAX( puerr_max, pverr_max ) ! velocity difference with previous iterate, should nearly be equivalent to evp code |
---|
| 1586 | ! if puerrmask and pverrmax are masked at 15% (TEST) |
---|
| 1587 | |
---|
| 1588 | ! --- Mean residual and kinetic energy |
---|
| 1589 | IF ( kiter == 1 ) THEN |
---|
| 1590 | |
---|
| 1591 | zu_res_mean = 0._wp |
---|
| 1592 | zv_res_mean = 0._wp |
---|
| 1593 | zvelres = 0._wp |
---|
| 1594 | zmke = 0._wp |
---|
| 1595 | |
---|
| 1596 | ELSE |
---|
| 1597 | |
---|
| 1598 | ! -- Mean residual (N/m^2), zu_res_mean |
---|
| 1599 | ! Here we take the residual of the linear system (N/m^2), |
---|
| 1600 | ! We define it as in mitgcm: square-root of area-weighted mean square residual |
---|
| 1601 | ! Local residual r = Ax - B expresses to which extent the momentum balance is verified |
---|
| 1602 | ! i.e., how close we are to a solution |
---|
| 1603 | |
---|
| 1604 | IF ( lwp ) WRITE(numout,*) ' TEST 1 ' |
---|
| 1605 | |
---|
| 1606 | z1_pglob_area = 1._wp / pglob_area |
---|
| 1607 | |
---|
| 1608 | zu_res(:,:) = 0._wp; zv_res(:,:) = 0._wp |
---|
| 1609 | |
---|
| 1610 | DO jj = 2, jpj - 1 |
---|
| 1611 | DO ji = 2, jpi - 1 |
---|
| 1612 | zu_res(ji,jj) = ( prhsu(ji,jj) + pDU(ji,jj) * pu(ji,jj-1) + pEU(ji,jj) * pu(ji,jj+1) & |
---|
| 1613 | & - pAU(ji,jj) * pu(ji-1,jj) - pBU(ji,jj) * pu(ji,jj) - pCU(ji,jj) * pu(ji+1,jj) ) |
---|
| 1614 | |
---|
| 1615 | zv_res(ji,jj) = ( prhsv(ji,jj) + pDV(ji,jj) * pv(ji-1,jj) + pEV(ji,jj) * pv(ji+1,jj) & |
---|
| 1616 | & - pAV(ji,jj) * pv(ji,jj-1) - pBV(ji,jj) * pv(ji,jj) - pCV(ji,jj) * pv(ji,jj+1) ) |
---|
| 1617 | |
---|
| 1618 | zu_res(ji,jj) = SQRT( zu_res(ji,jj) * zu_res(ji,jj) ) * umask(ji,jj,1) * e1e2u(ji,jj) * z1_pglob_area |
---|
| 1619 | zv_res(ji,jj) = SQRT( zv_res(ji,jj) * zv_res(ji,jj) ) * vmask(ji,jj,1) * e1e2v(ji,jj) * z1_pglob_area |
---|
| 1620 | |
---|
| 1621 | END DO |
---|
| 1622 | END DO |
---|
| 1623 | |
---|
| 1624 | IF ( lwp ) WRITE(numout,*) ' TEST 2 ' |
---|
| 1625 | zu_res_mean = glob_sum( 'ice_rhg_vp', zu_res(:,:) ) |
---|
| 1626 | zv_res_mean = glob_sum( 'ice_rhg_vp', zv_res(:,:) ) |
---|
| 1627 | IF ( lwp ) WRITE(numout,*) ' TEST 3 ' |
---|
| 1628 | zvelres = 0.5_wp * ( zu_res_mean + zv_res_mean ) |
---|
| 1629 | |
---|
| 1630 | IF ( lwp ) WRITE(numout,*) ' TEST 4 ' |
---|
| 1631 | |
---|
| 1632 | ! -- Global mean kinetic energy per unit area (J/m2) |
---|
| 1633 | zvel2(:,:) = 0._wp |
---|
| 1634 | DO jj = 2, jpj - 1 |
---|
| 1635 | DO ji = 2, jpi - 1 |
---|
| 1636 | zu = 0.5_wp * ( pu(ji-1,jj) + pu(ji,jj) ) ! u-vel at T-point |
---|
| 1637 | zv = 0.5_wp * ( pv(ji,jj-1) + pv(ji,jj) ) |
---|
| 1638 | zvel2(ji,jj) = zu*zu + zv*zv ! square of ice velocity at T-point |
---|
| 1639 | END DO |
---|
| 1640 | END DO |
---|
| 1641 | |
---|
| 1642 | IF ( lwp ) WRITE(numout,*) ' TEST 5 ' |
---|
| 1643 | |
---|
| 1644 | zmke = 0.5_wp * glob_sum( 'ice_rhg_vp', pmt(:,:) * e1e2t(:,:) * zvel2(:,:) ) / pglob_area |
---|
| 1645 | |
---|
| 1646 | IF ( lwp ) WRITE(numout,*) ' TEST 6 ' |
---|
| 1647 | |
---|
| 1648 | ENDIF ! kiter |
---|
| 1649 | |
---|
| 1650 | ! ! ==================== ! |
---|
| 1651 | |
---|
| 1652 | ! time |
---|
| 1653 | it = ( kt - 1 ) * kitermax + kiter |
---|
| 1654 | |
---|
| 1655 | |
---|
| 1656 | IF( lwm ) THEN |
---|
| 1657 | ! write variables |
---|
| 1658 | istatus = NF90_PUT_VAR( ncvgid, nvarid_ures, (/zu_res_mean/), (/it/), (/1/) ) ! U-residual of the linear system |
---|
| 1659 | istatus = NF90_PUT_VAR( ncvgid, nvarid_vres, (/zv_res_mean/), (/it/), (/1/) ) ! V-residual of the linear system |
---|
| 1660 | istatus = NF90_PUT_VAR( ncvgid, nvarid_velres, (/zvelres/), (/it/), (/1/) ) ! average of u- and v- residuals |
---|
| 1661 | istatus = NF90_PUT_VAR( ncvgid, nvarid_udif, (/puerr_max/), (/it/), (/1/) ) ! max U velocity difference, inner iterations |
---|
| 1662 | istatus = NF90_PUT_VAR( ncvgid, nvarid_vdif, (/pverr_max/), (/it/), (/1/) ) ! max V velocity difference, inner iterations |
---|
| 1663 | istatus = NF90_PUT_VAR( ncvgid, nvarid_veldif, (/zveldif/), (/it/), (/1/) ) ! max U or V velocity diff between subiterations |
---|
| 1664 | istatus = NF90_PUT_VAR( ncvgid, nvarid_mke, (/zmke/), (/it/), (/1/) ) ! mean kinetic energy |
---|
| 1665 | |
---|
| 1666 | ! |
---|
| 1667 | IF ( kiter == kitermax ) THEN |
---|
| 1668 | WRITE(numout,*) ' Should plot the spatially dependent residual ' |
---|
| 1669 | istatus = NF90_PUT_VAR( ncvgid, nvarid_ures_xy, (/zu_res/) ) ! U-residual, spatially dependent |
---|
| 1670 | istatus = NF90_PUT_VAR( ncvgid, nvarid_vres_xy, (/zv_res/) ) ! V-residual, spatially dependent |
---|
| 1671 | ENDIF |
---|
| 1672 | |
---|
| 1673 | ! close file |
---|
| 1674 | IF( kt == nitend ) istatus = NF90_CLOSE( ncvgid ) |
---|
| 1675 | ENDIF |
---|
| 1676 | |
---|
| 1677 | END SUBROUTINE rhg_cvg_vp |
---|
| 1678 | |
---|
| 1679 | |
---|
| 1680 | |
---|
| 1681 | #else |
---|
| 1682 | !!---------------------------------------------------------------------- |
---|
| 1683 | !! Default option Empty module NO SI3 sea-ice model |
---|
| 1684 | !!---------------------------------------------------------------------- |
---|
| 1685 | #endif |
---|
| 1686 | |
---|
| 1687 | !!============================================================================== |
---|
| 1688 | END MODULE icedyn_rhg_vp |
---|
| 1689 | |
---|