| [8407] | 1 | MODULE icerhg_evp |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE icerhg_evp *** |
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| 4 | !! Ice rheology : sea ice rheology |
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| 5 | !!====================================================================== |
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| 6 | !! History : - ! 2007-03 (M.A. Morales Maqueda, S. Bouillon) Original code |
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| 7 | !! 3.0 ! 2008-03 (M. Vancoppenolle) LIM3 |
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| 8 | !! - ! 2008-11 (M. Vancoppenolle, S. Bouillon, Y. Aksenov) add surface tilt in ice rheolohy |
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| 9 | !! 3.3 ! 2009-05 (G.Garric) addition of the evp cas |
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| 10 | !! 3.4 ! 2011-01 (A. Porter) dynamical allocation |
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| 11 | !! 3.5 ! 2012-08 (R. Benshila) AGRIF |
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| 12 | !! 3.6 ! 2016-06 (C. Rousset) Rewriting + landfast ice + possibility to use mEVP (Bouillon 2013) |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | #if defined key_lim3 |
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| 15 | !!---------------------------------------------------------------------- |
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| 16 | !! 'key_lim3' LIM-3 sea-ice model |
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| 17 | !!---------------------------------------------------------------------- |
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| 18 | !! ice_rhg_evp : computes ice velocities |
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| 19 | !!---------------------------------------------------------------------- |
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| 20 | USE phycst ! Physical constant |
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| 21 | USE par_oce ! Ocean parameters |
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| 22 | USE dom_oce ! Ocean domain |
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| 23 | USE sbc_oce , ONLY : ln_ice_embd, nn_fsbc, ssh_m |
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| 24 | USE sbc_ice , ONLY : utau_ice, vtau_ice, snwice_mass, snwice_mass_b |
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| 25 | USE ice ! ice variables |
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| [8409] | 26 | USE icerdgrft ! ice strength |
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| [8407] | 27 | ! |
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| 28 | USE lbclnk ! Lateral Boundary Condition / MPP link |
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| 29 | USE lib_mpp ! MPP library |
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| 30 | USE in_out_manager ! I/O manager |
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| 31 | USE prtctl ! Print control |
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| 32 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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| [8498] | 33 | USE iom ! |
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| [8407] | 34 | #if defined key_agrif |
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| 35 | USE agrif_lim3_interp |
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| 36 | #endif |
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| 37 | USE bdy_oce , ONLY: ln_bdy |
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| 38 | USE bdyice |
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| 39 | |
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| 40 | IMPLICIT NONE |
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| 41 | PRIVATE |
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| 42 | |
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| 43 | PUBLIC ice_rhg_evp ! routine called by icerhg.F90 |
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| 44 | |
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| 45 | !! * Substitutions |
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| 46 | # include "vectopt_loop_substitute.h90" |
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| 47 | !!---------------------------------------------------------------------- |
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| [8486] | 48 | !! NEMO/ICE 4.0 , NEMO Consortium (2017) |
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| [8407] | 49 | !! $Id: icerhg_evp.F90 8378 2017-07-26 13:55:59Z clem $ |
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| 50 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 51 | !!---------------------------------------------------------------------- |
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| 52 | CONTAINS |
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| 53 | |
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| 54 | SUBROUTINE ice_rhg_evp( stress1_i, stress2_i, stress12_i, u_ice, v_ice, shear_i, divu_i, delta_i ) |
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| 55 | !!------------------------------------------------------------------- |
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| 56 | !! *** SUBROUTINE ice_rhg_evp *** |
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| 57 | !! EVP-C-grid |
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| 58 | !! |
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| 59 | !! ** purpose : determines sea ice drift from wind stress, ice-ocean |
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| 60 | !! stress and sea-surface slope. Ice-ice interaction is described by |
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| 61 | !! a non-linear elasto-viscous-plastic (EVP) law including shear |
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| 62 | !! strength and a bulk rheology (Hunke and Dukowicz, 2002). |
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| 63 | !! |
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| 64 | !! The points in the C-grid look like this, dear reader |
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| 65 | !! |
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| 66 | !! (ji,jj) |
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| 67 | !! | |
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| 68 | !! | |
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| 69 | !! (ji-1,jj) | (ji,jj) |
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| 70 | !! --------- |
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| 71 | !! | | |
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| 72 | !! | (ji,jj) |------(ji,jj) |
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| 73 | !! | | |
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| 74 | !! --------- |
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| 75 | !! (ji-1,jj-1) (ji,jj-1) |
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| 76 | !! |
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| 77 | !! ** Inputs : - wind forcing (stress), oceanic currents |
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| 78 | !! ice total volume (vt_i) per unit area |
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| 79 | !! snow total volume (vt_s) per unit area |
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| 80 | !! |
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| 81 | !! ** Action : - compute u_ice, v_ice : the components of the |
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| 82 | !! sea-ice velocity vector |
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| 83 | !! - compute delta_i, shear_i, divu_i, which are inputs |
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| 84 | !! of the ice thickness distribution |
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| 85 | !! |
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| 86 | !! ** Steps : 1) Compute ice snow mass, ice strength |
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| 87 | !! 2) Compute wind, oceanic stresses, mass terms and |
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| 88 | !! coriolis terms of the momentum equation |
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| 89 | !! 3) Solve the momentum equation (iterative procedure) |
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| 90 | !! 4) Prevent high velocities if the ice is thin |
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| 91 | !! 5) Recompute invariants of the strain rate tensor |
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| 92 | !! which are inputs of the ITD, store stress |
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| 93 | !! for the next time step |
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| 94 | !! 6) Control prints of residual (convergence) |
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| 95 | !! and charge ellipse. |
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| 96 | !! The user should make sure that the parameters |
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| 97 | !! nn_nevp, elastic time scale and rn_creepl maintain stress state |
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| 98 | !! on the charge ellipse for plastic flow |
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| 99 | !! e.g. in the Canadian Archipelago |
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| 100 | !! |
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| 101 | !! ** Notes : There is the possibility to use mEVP from Bouillon 2013 |
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| 102 | !! (by uncommenting some lines in part 3 and changing alpha and beta parameters) |
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| 103 | !! but this solution appears very unstable (see Kimmritz et al 2016) |
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| 104 | !! |
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| 105 | !! References : Hunke and Dukowicz, JPO97 |
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| 106 | !! Bouillon et al., Ocean Modelling 2009 |
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| 107 | !! Bouillon et al., Ocean Modelling 2013 |
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| 108 | !!------------------------------------------------------------------- |
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| 109 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: stress1_i, stress2_i, stress12_i |
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| 110 | REAL(wp), DIMENSION(jpi,jpj), INTENT( out) :: u_ice, v_ice, shear_i, divu_i, delta_i |
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| 111 | !! |
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| 112 | INTEGER :: ji, jj ! dummy loop indices |
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| 113 | INTEGER :: jter ! local integers |
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| 114 | |
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| 115 | REAL(wp) :: zrhoco ! rau0 * rn_cio |
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| 116 | REAL(wp) :: zdtevp, z1_dtevp ! time step for subcycling |
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| 117 | REAL(wp) :: ecc2, z1_ecc2 ! square of yield ellipse eccenticity |
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| 118 | REAL(wp) :: zbeta, zalph1, z1_alph1, zalph2, z1_alph2 ! alpha and beta from Bouillon 2009 and 2013 |
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| 119 | REAL(wp) :: zm1, zm2, zm3, zmassU, zmassV ! ice/snow mass |
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| 120 | REAL(wp) :: zdelta, zp_delf, zds2, zdt, zdt2, zdiv, zdiv2 ! temporary scalars |
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| 121 | REAL(wp) :: zTauO, zTauB, zTauE, zvel ! temporary scalars |
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| 122 | |
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| 123 | REAL(wp) :: zresm ! Maximal error on ice velocity |
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| 124 | REAL(wp) :: zintb, zintn ! dummy argument |
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| 125 | REAL(wp) :: zfac_x, zfac_y |
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| [8498] | 126 | REAL(wp) :: zshear, zdum1, zdum2 |
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| [8407] | 127 | |
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| 128 | REAL(wp), DIMENSION(jpi,jpj) :: z1_e1t0, z1_e2t0 ! scale factors |
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| 129 | REAL(wp), DIMENSION(jpi,jpj) :: zp_delt ! P/delta at T points |
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| 130 | ! |
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| 131 | REAL(wp), DIMENSION(jpi,jpj) :: zaU , zaV ! ice fraction on U/V points |
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| 132 | REAL(wp), DIMENSION(jpi,jpj) :: zmU_t, zmV_t ! ice/snow mass/dt on U/V points |
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| 133 | REAL(wp), DIMENSION(jpi,jpj) :: zmf ! coriolis parameter at T points |
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| 134 | REAL(wp), DIMENSION(jpi,jpj) :: zTauU_ia , ztauV_ia ! ice-atm. stress at U-V points |
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| 135 | REAL(wp), DIMENSION(jpi,jpj) :: zspgU , zspgV ! surface pressure gradient at U/V points |
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| 136 | 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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| 137 | REAL(wp), DIMENSION(jpi,jpj) :: zfU , zfV ! internal stresses |
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| 138 | |
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| 139 | REAL(wp), DIMENSION(jpi,jpj) :: zds ! shear |
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| 140 | REAL(wp), DIMENSION(jpi,jpj) :: zs1, zs2, zs12 ! stress tensor components |
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| 141 | REAL(wp), DIMENSION(jpi,jpj) :: zu_ice, zv_ice, zresr ! check convergence |
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| 142 | REAL(wp), DIMENSION(jpi,jpj) :: zpice ! array used for the calculation of ice surface slope: |
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| 143 | ! ocean surface (ssh_m) if ice is not embedded |
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| 144 | ! ice top surface if ice is embedded |
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| 145 | REAL(wp), DIMENSION(jpi,jpj) :: zCorx, zCory ! Coriolis stress array |
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| 146 | REAL(wp), DIMENSION(jpi,jpj) :: ztaux_oi, ztauy_oi ! Ocean-to-ice stress array |
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| 147 | |
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| 148 | REAL(wp), DIMENSION(jpi,jpj) :: zswitchU, zswitchV ! dummy arrays |
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| 149 | REAL(wp), DIMENSION(jpi,jpj) :: zmaskU, zmaskV ! mask for ice presence |
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| 150 | REAL(wp), DIMENSION(jpi,jpj) :: zfmask, zwf ! mask at F points for the ice |
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| 151 | |
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| 152 | REAL(wp), PARAMETER :: zepsi = 1.0e-20_wp ! tolerance parameter |
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| 153 | REAL(wp), PARAMETER :: zmmin = 1._wp ! ice mass (kg/m2) below which ice velocity equals ocean velocity |
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| [8498] | 154 | !! --- diags |
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| 155 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zswi, zsig1, zsig2, zsig3 |
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| 156 | !! --- SIMIP diags |
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| 157 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_sig1 ! Average normal stress in sea ice |
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| 158 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_sig2 ! Maximum shear stress in sea ice |
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| 159 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_dssh_dx ! X-direction sea-surface tilt term (N/m2) |
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| 160 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_dssh_dy ! X-direction sea-surface tilt term (N/m2) |
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| 161 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_corstrx ! X-direction coriolis stress (N/m2) |
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| 162 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_corstry ! Y-direction coriolis stress (N/m2) |
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| 163 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_intstrx ! X-direction internal stress (N/m2) |
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| 164 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_intstry ! Y-direction internal stress (N/m2) |
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| 165 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_utau_oi ! X-direction ocean-ice stress |
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| 166 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_vtau_oi ! Y-direction ocean-ice stress |
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| 167 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_xmtrp_ice ! X-component of ice mass transport (kg/s) |
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| 168 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_ymtrp_ice ! Y-component of ice mass transport (kg/s) |
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| 169 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_xmtrp_snw ! X-component of snow mass transport (kg/s) |
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| 170 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_ymtrp_snw ! Y-component of snow mass transport (kg/s) |
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| 171 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_xatrp ! X-component of area transport (m2/s) |
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| 172 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdiag_yatrp ! Y-component of area transport (m2/s) |
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| [8407] | 173 | !!------------------------------------------------------------------- |
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| 174 | |
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| 175 | #if defined key_agrif |
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| 176 | CALL agrif_interp_lim3( 'U', 0, nn_nevp ) ! First interpolation of coarse values |
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| 177 | CALL agrif_interp_lim3( 'V', 0, nn_nevp ) |
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| 178 | #endif |
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| 179 | ! |
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| 180 | !------------------------------------------------------------------------------! |
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| 181 | ! 0) mask at F points for the ice |
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| 182 | !------------------------------------------------------------------------------! |
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| 183 | ! ocean/land mask |
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| 184 | DO jj = 1, jpjm1 |
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| 185 | DO ji = 1, jpim1 ! NO vector opt. |
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| 186 | 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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| 187 | END DO |
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| 188 | END DO |
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| 189 | CALL lbc_lnk( zfmask, 'F', 1._wp ) |
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| 190 | |
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| 191 | ! Lateral boundary conditions on velocity (modify zfmask) |
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| 192 | zwf(:,:) = zfmask(:,:) |
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| 193 | DO jj = 2, jpjm1 |
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| 194 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 195 | IF( zfmask(ji,jj) == 0._wp ) THEN |
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| 196 | zfmask(ji,jj) = rn_ishlat * MIN( 1._wp , MAX( zwf(ji+1,jj), zwf(ji,jj+1), zwf(ji-1,jj), zwf(ji,jj-1) ) ) |
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| 197 | ENDIF |
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| 198 | END DO |
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| 199 | END DO |
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| 200 | DO jj = 2, jpjm1 |
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| 201 | IF( zfmask(1,jj) == 0._wp ) THEN |
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| 202 | zfmask(1 ,jj) = rn_ishlat * MIN( 1._wp , MAX( zwf(2,jj), zwf(1,jj+1), zwf(1,jj-1) ) ) |
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| 203 | ENDIF |
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| 204 | IF( zfmask(jpi,jj) == 0._wp ) THEN |
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| 205 | zfmask(jpi,jj) = rn_ishlat * MIN( 1._wp , MAX( zwf(jpi,jj+1), zwf(jpim1,jj), zwf(jpi,jj-1) ) ) |
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| 206 | ENDIF |
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| 207 | END DO |
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| 208 | DO ji = 2, jpim1 |
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| 209 | IF( zfmask(ji,1) == 0._wp ) THEN |
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| 210 | zfmask(ji,1 ) = rn_ishlat * MIN( 1._wp , MAX( zwf(ji+1,1), zwf(ji,2), zwf(ji-1,1) ) ) |
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| 211 | ENDIF |
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| 212 | IF( zfmask(ji,jpj) == 0._wp ) THEN |
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| 213 | zfmask(ji,jpj) = rn_ishlat * MIN( 1._wp , MAX( zwf(ji+1,jpj), zwf(ji-1,jpj), zwf(ji,jpjm1) ) ) |
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| 214 | ENDIF |
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| 215 | END DO |
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| 216 | CALL lbc_lnk( zfmask, 'F', 1._wp ) |
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| 217 | |
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| 218 | !------------------------------------------------------------------------------! |
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| 219 | ! 1) define some variables and initialize arrays |
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| 220 | !------------------------------------------------------------------------------! |
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| 221 | zrhoco = rau0 * rn_cio |
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| 222 | |
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| 223 | ! ecc2: square of yield ellipse eccenticrity |
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| 224 | ecc2 = rn_ecc * rn_ecc |
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| 225 | z1_ecc2 = 1._wp / ecc2 |
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| 226 | |
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| 227 | ! Time step for subcycling |
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| 228 | zdtevp = rdt_ice / REAL( nn_nevp ) |
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| 229 | z1_dtevp = 1._wp / zdtevp |
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| 230 | |
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| 231 | ! alpha parameters (Bouillon 2009) |
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| 232 | zalph1 = ( 2._wp * rn_relast * rdt_ice ) * z1_dtevp |
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| 233 | zalph2 = zalph1 * z1_ecc2 |
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| 234 | |
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| 235 | ! alpha and beta parameters (Bouillon 2013) |
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| 236 | !!zalph1 = 40. |
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| 237 | !!zalph2 = 40. |
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| 238 | !!zbeta = 3000. |
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| 239 | !!zbeta = REAL( nn_nevp ) ! close to classical EVP of Hunke (2001) |
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| 240 | |
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| 241 | z1_alph1 = 1._wp / ( zalph1 + 1._wp ) |
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| 242 | z1_alph2 = 1._wp / ( zalph2 + 1._wp ) |
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| 243 | |
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| 244 | ! Initialise stress tensor |
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| 245 | zs1 (:,:) = stress1_i (:,:) |
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| 246 | zs2 (:,:) = stress2_i (:,:) |
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| 247 | zs12(:,:) = stress12_i(:,:) |
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| 248 | |
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| 249 | ! Ice strength |
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| [8409] | 250 | CALL ice_rdgrft_icestrength( nn_icestr ) |
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| [8407] | 251 | |
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| 252 | ! scale factors |
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| 253 | DO jj = 2, jpjm1 |
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| 254 | DO ji = fs_2, fs_jpim1 |
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| 255 | z1_e1t0(ji,jj) = 1._wp / ( e1t(ji+1,jj ) + e1t(ji,jj ) ) |
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| 256 | z1_e2t0(ji,jj) = 1._wp / ( e2t(ji ,jj+1) + e2t(ji,jj ) ) |
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| 257 | END DO |
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| 258 | END DO |
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| 259 | |
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| 260 | ! |
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| 261 | !------------------------------------------------------------------------------! |
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| 262 | ! 2) Wind / ocean stress, mass terms, coriolis terms |
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| 263 | !------------------------------------------------------------------------------! |
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| 264 | |
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| 265 | IF( ln_ice_embd ) THEN !== embedded sea ice: compute representative ice top surface ==! |
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| 266 | ! |
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| 267 | ! average interpolation coeff as used in dynspg = (1/nn_fsbc) * {SUM[n/nn_fsbc], n=0,nn_fsbc-1} |
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| 268 | ! = (1/nn_fsbc)^2 * {SUM[n], n=0,nn_fsbc-1} |
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| 269 | zintn = REAL( nn_fsbc - 1 ) / REAL( nn_fsbc ) * 0.5_wp |
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| 270 | ! |
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| 271 | ! average interpolation coeff as used in dynspg = (1/nn_fsbc) * {SUM[1-n/nn_fsbc], n=0,nn_fsbc-1} |
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| 272 | ! = (1/nn_fsbc)^2 * (nn_fsbc^2 - {SUM[n], n=0,nn_fsbc-1}) |
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| 273 | zintb = REAL( nn_fsbc + 1 ) / REAL( nn_fsbc ) * 0.5_wp |
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| 274 | ! |
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| 275 | zpice(:,:) = ssh_m(:,:) + ( zintn * snwice_mass(:,:) + zintb * snwice_mass_b(:,:) ) * r1_rau0 |
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| 276 | ! |
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| 277 | ELSE !== non-embedded sea ice: use ocean surface for slope calculation ==! |
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| 278 | zpice(:,:) = ssh_m(:,:) |
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| 279 | ENDIF |
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| 280 | |
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| 281 | DO jj = 2, jpjm1 |
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| 282 | DO ji = fs_2, fs_jpim1 |
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| 283 | |
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| 284 | ! ice fraction at U-V points |
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| 285 | zaU(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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| 286 | zaV(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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| 287 | |
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| 288 | ! Ice/snow mass at U-V points |
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| 289 | zm1 = ( rhosn * vt_s(ji ,jj ) + rhoic * vt_i(ji ,jj ) ) |
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| 290 | zm2 = ( rhosn * vt_s(ji+1,jj ) + rhoic * vt_i(ji+1,jj ) ) |
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| 291 | zm3 = ( rhosn * vt_s(ji ,jj+1) + rhoic * vt_i(ji ,jj+1) ) |
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| 292 | 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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| 293 | 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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| 294 | |
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| 295 | ! Ocean currents at U-V points |
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| 296 | v_oceU(ji,jj) = 0.5_wp * ( ( v_oce(ji ,jj) + v_oce(ji ,jj-1) ) * e1t(ji+1,jj) & |
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| 297 | & + ( v_oce(ji+1,jj) + v_oce(ji+1,jj-1) ) * e1t(ji ,jj) ) * z1_e1t0(ji,jj) * umask(ji,jj,1) |
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| 298 | |
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| 299 | u_oceV(ji,jj) = 0.5_wp * ( ( u_oce(ji,jj ) + u_oce(ji-1,jj ) ) * e2t(ji,jj+1) & |
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| 300 | & + ( u_oce(ji,jj+1) + u_oce(ji-1,jj+1) ) * e2t(ji,jj ) ) * z1_e2t0(ji,jj) * vmask(ji,jj,1) |
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| 301 | |
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| 302 | ! Coriolis at T points (m*f) |
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| 303 | zmf(ji,jj) = zm1 * ff_t(ji,jj) |
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| 304 | |
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| 305 | ! m/dt |
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| 306 | zmU_t(ji,jj) = zmassU * z1_dtevp |
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| 307 | zmV_t(ji,jj) = zmassV * z1_dtevp |
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| 308 | |
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| 309 | ! Drag ice-atm. |
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| 310 | zTauU_ia(ji,jj) = zaU(ji,jj) * utau_ice(ji,jj) |
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| 311 | zTauV_ia(ji,jj) = zaV(ji,jj) * vtau_ice(ji,jj) |
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| 312 | |
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| 313 | ! Surface pressure gradient (- m*g*GRAD(ssh)) at U-V points |
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| 314 | zspgU(ji,jj) = - zmassU * grav * ( zpice(ji+1,jj) - zpice(ji,jj) ) * r1_e1u(ji,jj) |
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| 315 | zspgV(ji,jj) = - zmassV * grav * ( zpice(ji,jj+1) - zpice(ji,jj) ) * r1_e2v(ji,jj) |
|---|
| 316 | |
|---|
| 317 | ! masks |
|---|
| 318 | zmaskU(ji,jj) = 1._wp - MAX( 0._wp, SIGN( 1._wp, -zmassU ) ) ! 0 if no ice |
|---|
| 319 | zmaskV(ji,jj) = 1._wp - MAX( 0._wp, SIGN( 1._wp, -zmassV ) ) ! 0 if no ice |
|---|
| 320 | |
|---|
| 321 | ! switches |
|---|
| 322 | zswitchU(ji,jj) = MAX( 0._wp, SIGN( 1._wp, zmassU - zmmin ) ) ! 0 if ice mass < zmmin |
|---|
| 323 | zswitchV(ji,jj) = MAX( 0._wp, SIGN( 1._wp, zmassV - zmmin ) ) ! 0 if ice mass < zmmin |
|---|
| 324 | |
|---|
| 325 | END DO |
|---|
| 326 | END DO |
|---|
| 327 | CALL lbc_lnk( zmf, 'T', 1. ) |
|---|
| 328 | ! |
|---|
| 329 | !------------------------------------------------------------------------------! |
|---|
| 330 | ! 3) Solution of the momentum equation, iterative procedure |
|---|
| 331 | !------------------------------------------------------------------------------! |
|---|
| 332 | ! |
|---|
| 333 | ! !----------------------! |
|---|
| 334 | DO jter = 1 , nn_nevp ! loop over jter ! |
|---|
| 335 | ! !----------------------! |
|---|
| 336 | IF(ln_ctl) THEN ! Convergence test |
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| 337 | DO jj = 1, jpjm1 |
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| 338 | zu_ice(:,jj) = u_ice(:,jj) ! velocity at previous time step |
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| 339 | zv_ice(:,jj) = v_ice(:,jj) |
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| 340 | END DO |
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| 341 | ENDIF |
|---|
| 342 | |
|---|
| 343 | ! --- divergence, tension & shear (Appendix B of Hunke & Dukowicz, 2002) --- ! |
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| 344 | DO jj = 1, jpjm1 ! loops start at 1 since there is no boundary condition (lbc_lnk) at i=1 and j=1 for F points |
|---|
| 345 | DO ji = 1, jpim1 |
|---|
| 346 | |
|---|
| 347 | ! shear at F points |
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| 348 | 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) & |
|---|
| 349 | & + ( v_ice(ji+1,jj) * r1_e2v(ji+1,jj) - v_ice(ji,jj) * r1_e2v(ji,jj) ) * e2f(ji,jj) * e2f(ji,jj) & |
|---|
| 350 | & ) * r1_e1e2f(ji,jj) * zfmask(ji,jj) |
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| 351 | |
|---|
| 352 | END DO |
|---|
| 353 | END DO |
|---|
| 354 | CALL lbc_lnk( zds, 'F', 1. ) |
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| 355 | |
|---|
| 356 | DO jj = 2, jpjm1 |
|---|
| 357 | DO ji = 2, jpim1 ! no vector loop |
|---|
| 358 | |
|---|
| 359 | ! shear**2 at T points (doc eq. A16) |
|---|
| 360 | zds2 = ( zds(ji,jj ) * zds(ji,jj ) * e1e2f(ji,jj ) + zds(ji-1,jj ) * zds(ji-1,jj ) * e1e2f(ji-1,jj ) & |
|---|
| 361 | & + 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) & |
|---|
| 362 | & ) * 0.25_wp * r1_e1e2t(ji,jj) |
|---|
| 363 | |
|---|
| 364 | ! divergence at T points |
|---|
| 365 | zdiv = ( e2u(ji,jj) * u_ice(ji,jj) - e2u(ji-1,jj) * u_ice(ji-1,jj) & |
|---|
| 366 | & + e1v(ji,jj) * v_ice(ji,jj) - e1v(ji,jj-1) * v_ice(ji,jj-1) & |
|---|
| 367 | & ) * r1_e1e2t(ji,jj) |
|---|
| 368 | zdiv2 = zdiv * zdiv |
|---|
| 369 | |
|---|
| 370 | ! tension at T points |
|---|
| 371 | 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) & |
|---|
| 372 | & - ( v_ice(ji,jj) * r1_e1v(ji,jj) - v_ice(ji,jj-1) * r1_e1v(ji,jj-1) ) * e1t(ji,jj) * e1t(ji,jj) & |
|---|
| 373 | & ) * r1_e1e2t(ji,jj) |
|---|
| 374 | zdt2 = zdt * zdt |
|---|
| 375 | |
|---|
| 376 | ! delta at T points |
|---|
| 377 | zdelta = SQRT( zdiv2 + ( zdt2 + zds2 ) * z1_ecc2 ) |
|---|
| 378 | |
|---|
| 379 | ! P/delta at T points |
|---|
| 380 | zp_delt(ji,jj) = strength(ji,jj) / ( zdelta + rn_creepl ) |
|---|
| 381 | |
|---|
| 382 | ! stress at T points |
|---|
| 383 | zs1(ji,jj) = ( zs1(ji,jj) * zalph1 + zp_delt(ji,jj) * ( zdiv - zdelta ) ) * z1_alph1 |
|---|
| 384 | zs2(ji,jj) = ( zs2(ji,jj) * zalph2 + zp_delt(ji,jj) * ( zdt * z1_ecc2 ) ) * z1_alph2 |
|---|
| 385 | |
|---|
| 386 | END DO |
|---|
| 387 | END DO |
|---|
| 388 | CALL lbc_lnk( zp_delt, 'T', 1. ) |
|---|
| 389 | |
|---|
| 390 | DO jj = 1, jpjm1 |
|---|
| 391 | DO ji = 1, jpim1 |
|---|
| 392 | |
|---|
| 393 | ! P/delta at F points |
|---|
| 394 | zp_delf = 0.25_wp * ( zp_delt(ji,jj) + zp_delt(ji+1,jj) + zp_delt(ji,jj+1) + zp_delt(ji+1,jj+1) ) |
|---|
| 395 | |
|---|
| 396 | ! stress at F points |
|---|
| 397 | zs12(ji,jj)= ( zs12(ji,jj) * zalph2 + zp_delf * ( zds(ji,jj) * z1_ecc2 ) * 0.5_wp ) * z1_alph2 |
|---|
| 398 | |
|---|
| 399 | END DO |
|---|
| 400 | END DO |
|---|
| 401 | CALL lbc_lnk_multi( zs1, 'T', 1., zs2, 'T', 1., zs12, 'F', 1. ) |
|---|
| 402 | |
|---|
| 403 | |
|---|
| 404 | ! --- Ice internal stresses (Appendix C of Hunke and Dukowicz, 2002) --- ! |
|---|
| 405 | DO jj = 2, jpjm1 |
|---|
| 406 | DO ji = fs_2, fs_jpim1 |
|---|
| [8486] | 407 | ! !--- U points |
|---|
| [8407] | 408 | zfU(ji,jj) = 0.5_wp * ( ( zs1(ji+1,jj) - zs1(ji,jj) ) * e2u(ji,jj) & |
|---|
| 409 | & + ( zs2(ji+1,jj) * e2t(ji+1,jj) * e2t(ji+1,jj) - zs2(ji,jj) * e2t(ji,jj) * e2t(ji,jj) & |
|---|
| 410 | & ) * r1_e2u(ji,jj) & |
|---|
| 411 | & + ( zs12(ji,jj) * e1f(ji,jj) * e1f(ji,jj) - zs12(ji,jj-1) * e1f(ji,jj-1) * e1f(ji,jj-1) & |
|---|
| 412 | & ) * 2._wp * r1_e1u(ji,jj) & |
|---|
| 413 | & ) * r1_e1e2u(ji,jj) |
|---|
| [8486] | 414 | ! |
|---|
| 415 | ! !--- V points |
|---|
| [8407] | 416 | zfV(ji,jj) = 0.5_wp * ( ( zs1(ji,jj+1) - zs1(ji,jj) ) * e1v(ji,jj) & |
|---|
| 417 | & - ( zs2(ji,jj+1) * e1t(ji,jj+1) * e1t(ji,jj+1) - zs2(ji,jj) * e1t(ji,jj) * e1t(ji,jj) & |
|---|
| 418 | & ) * r1_e1v(ji,jj) & |
|---|
| 419 | & + ( zs12(ji,jj) * e2f(ji,jj) * e2f(ji,jj) - zs12(ji-1,jj) * e2f(ji-1,jj) * e2f(ji-1,jj) & |
|---|
| 420 | & ) * 2._wp * r1_e2v(ji,jj) & |
|---|
| 421 | & ) * r1_e1e2v(ji,jj) |
|---|
| [8486] | 422 | ! |
|---|
| 423 | ! !--- u_ice at V point |
|---|
| [8407] | 424 | u_iceV(ji,jj) = 0.5_wp * ( ( u_ice(ji,jj ) + u_ice(ji-1,jj ) ) * e2t(ji,jj+1) & |
|---|
| 425 | & + ( u_ice(ji,jj+1) + u_ice(ji-1,jj+1) ) * e2t(ji,jj ) ) * z1_e2t0(ji,jj) * vmask(ji,jj,1) |
|---|
| [8486] | 426 | ! |
|---|
| 427 | ! !--- v_ice at U point |
|---|
| [8407] | 428 | v_iceU(ji,jj) = 0.5_wp * ( ( v_ice(ji ,jj) + v_ice(ji ,jj-1) ) * e1t(ji+1,jj) & |
|---|
| 429 | & + ( v_ice(ji+1,jj) + v_ice(ji+1,jj-1) ) * e1t(ji ,jj) ) * z1_e1t0(ji,jj) * umask(ji,jj,1) |
|---|
| [8486] | 430 | ! |
|---|
| [8407] | 431 | END DO |
|---|
| 432 | END DO |
|---|
| 433 | ! |
|---|
| 434 | ! --- Computation of ice velocity --- ! |
|---|
| 435 | ! Bouillon et al. 2013 (eq 47-48) => unstable unless alpha, beta are chosen wisely and large nn_nevp |
|---|
| 436 | ! Bouillon et al. 2009 (eq 34-35) => stable |
|---|
| [8486] | 437 | IF( MOD(jter,2) == 0 ) THEN ! even iterations |
|---|
| 438 | ! |
|---|
| [8407] | 439 | DO jj = 2, jpjm1 |
|---|
| 440 | DO ji = fs_2, fs_jpim1 |
|---|
| [8486] | 441 | ! !--- tau_io/(v_oce - v_ice) |
|---|
| [8407] | 442 | zTauO = zaV(ji,jj) * zrhoco * SQRT( ( v_ice (ji,jj) - v_oce (ji,jj) ) * ( v_ice (ji,jj) - v_oce (ji,jj) ) & |
|---|
| 443 | & + ( u_iceV(ji,jj) - u_oceV(ji,jj) ) * ( u_iceV(ji,jj) - u_oceV(ji,jj) ) ) |
|---|
| [8486] | 444 | ! !--- Ocean-to-Ice stress |
|---|
| [8407] | 445 | ztauy_oi(ji,jj) = zTauO * ( v_oce(ji,jj) - v_ice(ji,jj) ) |
|---|
| [8486] | 446 | ! |
|---|
| 447 | ! !--- tau_bottom/v_ice |
|---|
| [8407] | 448 | zvel = MAX( zepsi, SQRT( v_ice(ji,jj) * v_ice(ji,jj) + u_iceV(ji,jj) * u_iceV(ji,jj) ) ) |
|---|
| 449 | zTauB = - tau_icebfr(ji,jj) / zvel |
|---|
| [8486] | 450 | ! |
|---|
| 451 | ! !--- Coriolis at V-points (energy conserving formulation) |
|---|
| [8407] | 452 | zCory(ji,jj) = - 0.25_wp * r1_e2v(ji,jj) * & |
|---|
| 453 | & ( zmf(ji,jj ) * ( e2u(ji,jj ) * u_ice(ji,jj ) + e2u(ji-1,jj ) * u_ice(ji-1,jj ) ) & |
|---|
| 454 | & + zmf(ji,jj+1) * ( e2u(ji,jj+1) * u_ice(ji,jj+1) + e2u(ji-1,jj+1) * u_ice(ji-1,jj+1) ) ) |
|---|
| [8486] | 455 | ! |
|---|
| 456 | ! !--- Sum of external forces (explicit solution) = F + tau_ia + Coriolis + spg + tau_io |
|---|
| [8407] | 457 | zTauE = zfV(ji,jj) + zTauV_ia(ji,jj) + zCory(ji,jj) + zspgV(ji,jj) + ztauy_oi(ji,jj) |
|---|
| [8486] | 458 | ! |
|---|
| 459 | ! !--- landfast switch => 0 = static friction ; 1 = sliding friction |
|---|
| [8407] | 460 | rswitch = 1._wp - MIN( 1._wp, ABS( SIGN( 1._wp, ztauE - tau_icebfr(ji,jj) ) - SIGN( 1._wp, zTauE ) ) ) |
|---|
| [8486] | 461 | ! |
|---|
| 462 | ! !--- ice velocity using implicit formulation (cf Madec doc & Bouillon 2009) |
|---|
| [8407] | 463 | v_ice(ji,jj) = ( ( rswitch * ( zmV_t(ji,jj) * v_ice(ji,jj) & ! previous velocity |
|---|
| 464 | & + zTauE + zTauO * v_ice(ji,jj) & ! F + tau_ia + Coriolis + spg + tau_io(only ocean part) |
|---|
| 465 | & ) / MAX( zepsi, zmV_t(ji,jj) + zTauO - zTauB ) & ! m/dt + tau_io(only ice part) + landfast |
|---|
| 466 | & + ( 1._wp - rswitch ) * v_ice(ji,jj) * MAX( 0._wp, 1._wp - zdtevp * rn_lfrelax ) & ! static friction => slow decrease to v=0 |
|---|
| 467 | & ) * zswitchV(ji,jj) + v_oce(ji,jj) * ( 1._wp - zswitchV(ji,jj) ) & ! v_ice = v_oce if mass < zmmin |
|---|
| 468 | & ) * zmaskV(ji,jj) |
|---|
| [8486] | 469 | ! |
|---|
| [8407] | 470 | ! Bouillon 2013 |
|---|
| 471 | !!v_ice(ji,jj) = ( zmV_t(ji,jj) * ( zbeta * v_ice(ji,jj) + v_ice_b(ji,jj) ) & |
|---|
| 472 | !! & + zfV(ji,jj) + zCory(ji,jj) + zTauV_ia(ji,jj) + zTauO * v_oce(ji,jj) + zspgV(ji,jj) & |
|---|
| 473 | !! & ) / MAX( zmV_t(ji,jj) * ( zbeta + 1._wp ) + zTauO - zTauB, zepsi ) * zswitchV(ji,jj) |
|---|
| [8486] | 474 | ! |
|---|
| [8407] | 475 | END DO |
|---|
| 476 | END DO |
|---|
| 477 | CALL lbc_lnk( v_ice, 'V', -1. ) |
|---|
| [8486] | 478 | ! |
|---|
| [8407] | 479 | #if defined key_agrif |
|---|
| 480 | !! CALL agrif_interp_lim3( 'V', jter, nn_nevp ) |
|---|
| 481 | CALL agrif_interp_lim3( 'V' ) |
|---|
| 482 | #endif |
|---|
| 483 | IF( ln_bdy ) CALL bdy_ice_dyn( 'V' ) |
|---|
| [8486] | 484 | ! |
|---|
| [8407] | 485 | DO jj = 2, jpjm1 |
|---|
| 486 | DO ji = fs_2, fs_jpim1 |
|---|
| 487 | |
|---|
| 488 | ! tau_io/(u_oce - u_ice) |
|---|
| 489 | zTauO = zaU(ji,jj) * zrhoco * SQRT( ( u_ice (ji,jj) - u_oce (ji,jj) ) * ( u_ice (ji,jj) - u_oce (ji,jj) ) & |
|---|
| 490 | & + ( v_iceU(ji,jj) - v_oceU(ji,jj) ) * ( v_iceU(ji,jj) - v_oceU(ji,jj) ) ) |
|---|
| 491 | |
|---|
| 492 | ! Ocean-to-Ice stress |
|---|
| 493 | ztaux_oi(ji,jj) = zTauO * ( u_oce(ji,jj) - u_ice(ji,jj) ) |
|---|
| 494 | |
|---|
| 495 | ! tau_bottom/u_ice |
|---|
| 496 | zvel = MAX( zepsi, SQRT( v_iceU(ji,jj) * v_iceU(ji,jj) + u_ice(ji,jj) * u_ice(ji,jj) ) ) |
|---|
| 497 | zTauB = - tau_icebfr(ji,jj) / zvel |
|---|
| 498 | |
|---|
| 499 | ! Coriolis at U-points (energy conserving formulation) |
|---|
| 500 | zCorx(ji,jj) = 0.25_wp * r1_e1u(ji,jj) * & |
|---|
| 501 | & ( zmf(ji ,jj) * ( e1v(ji ,jj) * v_ice(ji ,jj) + e1v(ji ,jj-1) * v_ice(ji ,jj-1) ) & |
|---|
| 502 | & + zmf(ji+1,jj) * ( e1v(ji+1,jj) * v_ice(ji+1,jj) + e1v(ji+1,jj-1) * v_ice(ji+1,jj-1) ) ) |
|---|
| 503 | |
|---|
| 504 | ! Sum of external forces (explicit solution) = F + tau_ia + Coriolis + spg + tau_io |
|---|
| 505 | zTauE = zfU(ji,jj) + zTauU_ia(ji,jj) + zCorx(ji,jj) + zspgU(ji,jj) + ztaux_oi(ji,jj) |
|---|
| 506 | |
|---|
| 507 | ! landfast switch => 0 = static friction ; 1 = sliding friction |
|---|
| 508 | rswitch = 1._wp - MIN( 1._wp, ABS( SIGN( 1._wp, ztauE - tau_icebfr(ji,jj) ) - SIGN( 1._wp, zTauE ) ) ) |
|---|
| 509 | |
|---|
| 510 | ! ice velocity using implicit formulation (cf Madec doc & Bouillon 2009) |
|---|
| 511 | u_ice(ji,jj) = ( ( rswitch * ( zmU_t(ji,jj) * u_ice(ji,jj) & ! previous velocity |
|---|
| 512 | & + zTauE + zTauO * u_ice(ji,jj) & ! F + tau_ia + Coriolis + spg + tau_io(only ocean part) |
|---|
| 513 | & ) / MAX( zepsi, zmU_t(ji,jj) + zTauO - zTauB ) & ! m/dt + tau_io(only ice part) + landfast |
|---|
| 514 | & + ( 1._wp - rswitch ) * u_ice(ji,jj) * MAX( 0._wp, 1._wp - zdtevp * rn_lfrelax ) & ! static friction => slow decrease to v=0 |
|---|
| 515 | & ) * zswitchU(ji,jj) + u_oce(ji,jj) * ( 1._wp - zswitchU(ji,jj) ) & ! v_ice = v_oce if mass < zmmin |
|---|
| 516 | & ) * zmaskU(ji,jj) |
|---|
| 517 | ! Bouillon 2013 |
|---|
| 518 | !!u_ice(ji,jj) = ( zmU_t(ji,jj) * ( zbeta * u_ice(ji,jj) + u_ice_b(ji,jj) ) & |
|---|
| 519 | !! & + zfU(ji,jj) + zCorx(ji,jj) + zTauU_ia(ji,jj) + zTauO * u_oce(ji,jj) + zspgU(ji,jj) & |
|---|
| 520 | !! & ) / MAX( zmU_t(ji,jj) * ( zbeta + 1._wp ) + zTauO - zTauB, zepsi ) * zswitchU(ji,jj) |
|---|
| 521 | END DO |
|---|
| 522 | END DO |
|---|
| 523 | CALL lbc_lnk( u_ice, 'U', -1. ) |
|---|
| [8486] | 524 | ! |
|---|
| [8407] | 525 | #if defined key_agrif |
|---|
| 526 | !! CALL agrif_interp_lim3( 'U', jter, nn_nevp ) |
|---|
| 527 | CALL agrif_interp_lim3( 'U' ) |
|---|
| 528 | #endif |
|---|
| 529 | IF( ln_bdy ) CALL bdy_ice_dyn( 'U' ) |
|---|
| [8486] | 530 | ! |
|---|
| [8407] | 531 | ELSE ! odd iterations |
|---|
| [8486] | 532 | ! |
|---|
| [8407] | 533 | DO jj = 2, jpjm1 |
|---|
| 534 | DO ji = fs_2, fs_jpim1 |
|---|
| 535 | |
|---|
| 536 | ! tau_io/(u_oce - u_ice) |
|---|
| 537 | zTauO = zaU(ji,jj) * zrhoco * SQRT( ( u_ice (ji,jj) - u_oce (ji,jj) ) * ( u_ice (ji,jj) - u_oce (ji,jj) ) & |
|---|
| 538 | & + ( v_iceU(ji,jj) - v_oceU(ji,jj) ) * ( v_iceU(ji,jj) - v_oceU(ji,jj) ) ) |
|---|
| 539 | |
|---|
| 540 | ! Ocean-to-Ice stress |
|---|
| 541 | ztaux_oi(ji,jj) = zTauO * ( u_oce(ji,jj) - u_ice(ji,jj) ) |
|---|
| 542 | |
|---|
| 543 | ! tau_bottom/u_ice |
|---|
| 544 | zvel = MAX( zepsi, SQRT( v_iceU(ji,jj) * v_iceU(ji,jj) + u_ice(ji,jj) * u_ice(ji,jj) ) ) |
|---|
| 545 | zTauB = - tau_icebfr(ji,jj) / zvel |
|---|
| 546 | |
|---|
| 547 | ! Coriolis at U-points (energy conserving formulation) |
|---|
| 548 | zCorx(ji,jj) = 0.25_wp * r1_e1u(ji,jj) * & |
|---|
| 549 | & ( zmf(ji ,jj) * ( e1v(ji ,jj) * v_ice(ji ,jj) + e1v(ji ,jj-1) * v_ice(ji ,jj-1) ) & |
|---|
| 550 | & + zmf(ji+1,jj) * ( e1v(ji+1,jj) * v_ice(ji+1,jj) + e1v(ji+1,jj-1) * v_ice(ji+1,jj-1) ) ) |
|---|
| 551 | |
|---|
| 552 | ! Sum of external forces (explicit solution) = F + tau_ia + Coriolis + spg + tau_io |
|---|
| 553 | zTauE = zfU(ji,jj) + zTauU_ia(ji,jj) + zCorx(ji,jj) + zspgU(ji,jj) + ztaux_oi(ji,jj) |
|---|
| 554 | |
|---|
| 555 | ! landfast switch => 0 = static friction ; 1 = sliding friction |
|---|
| 556 | rswitch = 1._wp - MIN( 1._wp, ABS( SIGN( 1._wp, ztauE - tau_icebfr(ji,jj) ) - SIGN( 1._wp, zTauE ) ) ) |
|---|
| 557 | |
|---|
| 558 | ! ice velocity using implicit formulation (cf Madec doc & Bouillon 2009) |
|---|
| 559 | u_ice(ji,jj) = ( ( rswitch * ( zmU_t(ji,jj) * u_ice(ji,jj) & ! previous velocity |
|---|
| 560 | & + zTauE + zTauO * u_ice(ji,jj) & ! F + tau_ia + Coriolis + spg + tau_io(only ocean part) |
|---|
| 561 | & ) / MAX( zepsi, zmU_t(ji,jj) + zTauO - zTauB ) & ! m/dt + tau_io(only ice part) + landfast |
|---|
| 562 | & + ( 1._wp - rswitch ) * u_ice(ji,jj) * MAX( 0._wp, 1._wp - zdtevp * rn_lfrelax ) & ! static friction => slow decrease to v=0 |
|---|
| 563 | & ) * zswitchU(ji,jj) + u_oce(ji,jj) * ( 1._wp - zswitchU(ji,jj) ) & ! v_ice = v_oce if mass < zmmin |
|---|
| 564 | & ) * zmaskU(ji,jj) |
|---|
| 565 | ! Bouillon 2013 |
|---|
| 566 | !!u_ice(ji,jj) = ( zmU_t(ji,jj) * ( zbeta * u_ice(ji,jj) + u_ice_b(ji,jj) ) & |
|---|
| 567 | !! & + zfU(ji,jj) + zCorx(ji,jj) + zTauU_ia(ji,jj) + zTauO * u_oce(ji,jj) + zspgU(ji,jj) & |
|---|
| 568 | !! & ) / MAX( zmU_t(ji,jj) * ( zbeta + 1._wp ) + zTauO - zTauB, zepsi ) * zswitchU(ji,jj) |
|---|
| 569 | END DO |
|---|
| 570 | END DO |
|---|
| 571 | CALL lbc_lnk( u_ice, 'U', -1. ) |
|---|
| [8486] | 572 | ! |
|---|
| [8407] | 573 | #if defined key_agrif |
|---|
| 574 | !! CALL agrif_interp_lim3( 'U', jter, nn_nevp ) |
|---|
| 575 | CALL agrif_interp_lim3( 'U' ) |
|---|
| 576 | #endif |
|---|
| 577 | IF( ln_bdy ) CALL bdy_ice_dyn( 'U' ) |
|---|
| [8486] | 578 | ! |
|---|
| [8407] | 579 | DO jj = 2, jpjm1 |
|---|
| 580 | DO ji = fs_2, fs_jpim1 |
|---|
| 581 | |
|---|
| 582 | ! tau_io/(v_oce - v_ice) |
|---|
| 583 | zTauO = zaV(ji,jj) * zrhoco * SQRT( ( v_ice (ji,jj) - v_oce (ji,jj) ) * ( v_ice (ji,jj) - v_oce (ji,jj) ) & |
|---|
| 584 | & + ( u_iceV(ji,jj) - u_oceV(ji,jj) ) * ( u_iceV(ji,jj) - u_oceV(ji,jj) ) ) |
|---|
| 585 | |
|---|
| 586 | ! Ocean-to-Ice stress |
|---|
| 587 | ztauy_oi(ji,jj) = zTauO * ( v_oce(ji,jj) - v_ice(ji,jj) ) |
|---|
| 588 | |
|---|
| 589 | ! tau_bottom/v_ice |
|---|
| 590 | zvel = MAX( zepsi, SQRT( v_ice(ji,jj) * v_ice(ji,jj) + u_iceV(ji,jj) * u_iceV(ji,jj) ) ) |
|---|
| 591 | ztauB = - tau_icebfr(ji,jj) / zvel |
|---|
| 592 | |
|---|
| 593 | ! Coriolis at V-points (energy conserving formulation) |
|---|
| 594 | zCory(ji,jj) = - 0.25_wp * r1_e2v(ji,jj) * & |
|---|
| 595 | & ( zmf(ji,jj ) * ( e2u(ji,jj ) * u_ice(ji,jj ) + e2u(ji-1,jj ) * u_ice(ji-1,jj ) ) & |
|---|
| 596 | & + zmf(ji,jj+1) * ( e2u(ji,jj+1) * u_ice(ji,jj+1) + e2u(ji-1,jj+1) * u_ice(ji-1,jj+1) ) ) |
|---|
| 597 | |
|---|
| 598 | ! Sum of external forces (explicit solution) = F + tau_ia + Coriolis + spg + tau_io |
|---|
| 599 | zTauE = zfV(ji,jj) + zTauV_ia(ji,jj) + zCory(ji,jj) + zspgV(ji,jj) + ztauy_oi(ji,jj) |
|---|
| 600 | |
|---|
| 601 | ! landfast switch => 0 = static friction (tau_icebfr > zTauE); 1 = sliding friction |
|---|
| 602 | rswitch = 1._wp - MIN( 1._wp, ABS( SIGN( 1._wp, zTauE - tau_icebfr(ji,jj) ) - SIGN( 1._wp, zTauE ) ) ) |
|---|
| 603 | |
|---|
| 604 | ! ice velocity using implicit formulation (cf Madec doc & Bouillon 2009) |
|---|
| 605 | v_ice(ji,jj) = ( ( rswitch * ( zmV_t(ji,jj) * v_ice(ji,jj) & ! previous velocity |
|---|
| 606 | & + zTauE + zTauO * v_ice(ji,jj) & ! F + tau_ia + Coriolis + spg + tau_io(only ocean part) |
|---|
| 607 | & ) / MAX( zepsi, zmV_t(ji,jj) + zTauO - zTauB ) & ! m/dt + tau_io(only ice part) + landfast |
|---|
| 608 | & + ( 1._wp - rswitch ) * v_ice(ji,jj) * MAX( 0._wp, 1._wp - zdtevp * rn_lfrelax ) & ! static friction => slow decrease to v=0 |
|---|
| 609 | & ) * zswitchV(ji,jj) + v_oce(ji,jj) * ( 1._wp - zswitchV(ji,jj) ) & ! v_ice = v_oce if mass < zmmin |
|---|
| 610 | & ) * zmaskV(ji,jj) |
|---|
| 611 | ! Bouillon 2013 |
|---|
| 612 | !!v_ice(ji,jj) = ( zmV_t(ji,jj) * ( zbeta * v_ice(ji,jj) + v_ice_b(ji,jj) ) & |
|---|
| 613 | !! & + zfV(ji,jj) + zCory(ji,jj) + zTauV_ia(ji,jj) + zTauO * v_oce(ji,jj) + zspgV(ji,jj) & |
|---|
| 614 | !! & ) / MAX( zmV_t(ji,jj) * ( zbeta + 1._wp ) + zTauO - zTauB, zepsi ) * zswitchV(ji,jj) |
|---|
| 615 | END DO |
|---|
| 616 | END DO |
|---|
| 617 | CALL lbc_lnk( v_ice, 'V', -1. ) |
|---|
| [8486] | 618 | ! |
|---|
| [8407] | 619 | #if defined key_agrif |
|---|
| 620 | !! CALL agrif_interp_lim3( 'V', jter, nn_nevp ) |
|---|
| 621 | CALL agrif_interp_lim3( 'V' ) |
|---|
| 622 | #endif |
|---|
| 623 | IF( ln_bdy ) CALL bdy_ice_dyn( 'V' ) |
|---|
| [8486] | 624 | ! |
|---|
| [8407] | 625 | ENDIF |
|---|
| 626 | |
|---|
| 627 | IF(ln_ctl) THEN ! Convergence test |
|---|
| 628 | DO jj = 2 , jpjm1 |
|---|
| 629 | zresr(:,jj) = MAX( ABS( u_ice(:,jj) - zu_ice(:,jj) ), ABS( v_ice(:,jj) - zv_ice(:,jj) ) ) |
|---|
| 630 | END DO |
|---|
| 631 | zresm = MAXVAL( zresr( 1:jpi, 2:jpjm1 ) ) |
|---|
| 632 | IF( lk_mpp ) CALL mpp_max( zresm ) ! max over the global domain |
|---|
| 633 | ENDIF |
|---|
| 634 | ! |
|---|
| 635 | ! ! ==================== ! |
|---|
| 636 | END DO ! end loop over jter ! |
|---|
| 637 | ! ! ==================== ! |
|---|
| 638 | ! |
|---|
| 639 | !------------------------------------------------------------------------------! |
|---|
| 640 | ! 4) Recompute delta, shear and div (inputs for mechanical redistribution) |
|---|
| 641 | !------------------------------------------------------------------------------! |
|---|
| 642 | DO jj = 1, jpjm1 |
|---|
| 643 | DO ji = 1, jpim1 |
|---|
| 644 | |
|---|
| 645 | ! shear at F points |
|---|
| 646 | 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) & |
|---|
| 647 | & + ( v_ice(ji+1,jj) * r1_e2v(ji+1,jj) - v_ice(ji,jj) * r1_e2v(ji,jj) ) * e2f(ji,jj) * e2f(ji,jj) & |
|---|
| 648 | & ) * r1_e1e2f(ji,jj) * zfmask(ji,jj) |
|---|
| 649 | |
|---|
| 650 | END DO |
|---|
| 651 | END DO |
|---|
| 652 | CALL lbc_lnk( zds, 'F', 1. ) |
|---|
| 653 | |
|---|
| 654 | DO jj = 2, jpjm1 |
|---|
| 655 | DO ji = 2, jpim1 ! no vector loop |
|---|
| 656 | |
|---|
| 657 | ! tension**2 at T points |
|---|
| 658 | 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) & |
|---|
| 659 | & - ( v_ice(ji,jj) * r1_e1v(ji,jj) - v_ice(ji,jj-1) * r1_e1v(ji,jj-1) ) * e1t(ji,jj) * e1t(ji,jj) & |
|---|
| 660 | & ) * r1_e1e2t(ji,jj) |
|---|
| 661 | zdt2 = zdt * zdt |
|---|
| 662 | |
|---|
| 663 | ! shear**2 at T points (doc eq. A16) |
|---|
| 664 | zds2 = ( zds(ji,jj ) * zds(ji,jj ) * e1e2f(ji,jj ) + zds(ji-1,jj ) * zds(ji-1,jj ) * e1e2f(ji-1,jj ) & |
|---|
| 665 | & + 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) & |
|---|
| 666 | & ) * 0.25_wp * r1_e1e2t(ji,jj) |
|---|
| 667 | |
|---|
| 668 | ! shear at T points |
|---|
| 669 | shear_i(ji,jj) = SQRT( zdt2 + zds2 ) |
|---|
| 670 | |
|---|
| 671 | ! divergence at T points |
|---|
| 672 | divu_i(ji,jj) = ( e2u(ji,jj) * u_ice(ji,jj) - e2u(ji-1,jj) * u_ice(ji-1,jj) & |
|---|
| 673 | & + e1v(ji,jj) * v_ice(ji,jj) - e1v(ji,jj-1) * v_ice(ji,jj-1) & |
|---|
| 674 | & ) * r1_e1e2t(ji,jj) |
|---|
| 675 | |
|---|
| 676 | ! delta at T points |
|---|
| 677 | zdelta = SQRT( divu_i(ji,jj) * divu_i(ji,jj) + ( zdt2 + zds2 ) * z1_ecc2 ) |
|---|
| 678 | rswitch = 1._wp - MAX( 0._wp, SIGN( 1._wp, -zdelta ) ) ! 0 if delta=0 |
|---|
| 679 | delta_i(ji,jj) = zdelta + rn_creepl * rswitch |
|---|
| 680 | |
|---|
| 681 | END DO |
|---|
| 682 | END DO |
|---|
| 683 | CALL lbc_lnk_multi( shear_i, 'T', 1., divu_i, 'T', 1., delta_i, 'T', 1. ) |
|---|
| 684 | |
|---|
| 685 | ! --- Store the stress tensor for the next time step --- ! |
|---|
| 686 | stress1_i (:,:) = zs1 (:,:) |
|---|
| 687 | stress2_i (:,:) = zs2 (:,:) |
|---|
| 688 | stress12_i(:,:) = zs12(:,:) |
|---|
| 689 | ! |
|---|
| 690 | |
|---|
| 691 | !------------------------------------------------------------------------------! |
|---|
| [8498] | 692 | ! 5) diagnostics |
|---|
| [8407] | 693 | !------------------------------------------------------------------------------! |
|---|
| [8498] | 694 | ! --- ellipse --- ! |
|---|
| 695 | IF( iom_use('isig1') .OR. iom_use('isig2') .OR. iom_use('isig3') ) THEN |
|---|
| 696 | ! |
|---|
| 697 | ALLOCATE( zswi(jpi,jpj) , zsig1(jpi,jpj) , zsig2(jpi,jpj) , zsig3(jpi,jpj) ) |
|---|
| 698 | ! |
|---|
| 699 | DO jj = 1, jpj |
|---|
| 700 | DO ji = 1, jpi |
|---|
| 701 | zswi(ji,jj) = MAX( 0._wp , SIGN( 1._wp , at_i(ji,jj) - epsi06 ) ) ! 1 if ice, 0 if no ice |
|---|
| 702 | END DO |
|---|
| 703 | END DO |
|---|
| 704 | |
|---|
| 705 | DO jj = 2, jpjm1 |
|---|
| 706 | DO ji = 2, jpim1 |
|---|
| 707 | zdum1 = ( zswi(ji-1,jj) * stress12_i(ji-1,jj) + zswi(ji ,jj-1) * stress12_i(ji ,jj-1) + & ! stress12_i at T-point |
|---|
| 708 | & zswi(ji ,jj) * stress12_i(ji ,jj) + zswi(ji-1,jj-1) * stress12_i(ji-1,jj-1) ) & |
|---|
| 709 | & / MAX( 1._wp, zswi(ji-1,jj) + zswi(ji,jj-1) + zswi(ji,jj) + zswi(ji-1,jj-1) ) |
|---|
| [8486] | 710 | |
|---|
| [8498] | 711 | zshear = SQRT( stress2_i(ji,jj) * stress2_i(ji,jj) + 4._wp * zdum1 * zdum1 ) ! shear stress |
|---|
| [8486] | 712 | |
|---|
| [8498] | 713 | zdum2 = zswi(ji,jj) / MAX( 1._wp, strength(ji,jj) ) |
|---|
| [8407] | 714 | |
|---|
| [8498] | 715 | !! zsig1(ji,jj) = 0.5_wp * zdum2 * ( stress1_i(ji,jj) + zshear ) ! principal stress (y-direction, see Hunke & Dukowicz 2002) |
|---|
| 716 | !! zsig2(ji,jj) = 0.5_wp * zdum2 * ( stress1_i(ji,jj) - zshear ) ! principal stress (x-direction, see Hunke & Dukowicz 2002) |
|---|
| 717 | !! zsig3(ji,jj) = zdum2**2 * ( ( stress1_i(ji,jj) + strength(ji,jj) )**2 + ( rn_ecc * zshear )**2 ) ! quadratic relation linking compressive stress to shear stress |
|---|
| 718 | !! ! (scheme converges if this value is ~1, see Bouillon et al 2009 (eq. 11)) |
|---|
| 719 | zsig1(ji,jj) = 0.5_wp * zdum2 * ( stress1_i(ji,jj) ) ! compressive stress, see Bouillon et al. 2015 |
|---|
| 720 | zsig2(ji,jj) = 0.5_wp * zdum2 * ( zshear ) ! shear stress |
|---|
| 721 | zsig3(ji,jj) = zdum2**2 * ( ( stress1_i(ji,jj) + strength(ji,jj) )**2 + ( rn_ecc * zshear )**2 ) |
|---|
| 722 | END DO |
|---|
| 723 | END DO |
|---|
| 724 | CALL lbc_lnk_multi( zsig1, 'T', 1., zsig2, 'T', 1., zsig3, 'T', 1. ) |
|---|
| 725 | ! |
|---|
| 726 | IF( iom_use('isig1') ) CALL iom_put( "isig1" , zsig1 ) |
|---|
| 727 | IF( iom_use('isig2') ) CALL iom_put( "isig2" , zsig2 ) |
|---|
| 728 | IF( iom_use('isig3') ) CALL iom_put( "isig3" , zsig3 ) |
|---|
| 729 | ! |
|---|
| 730 | DEALLOCATE( zswi , zsig1 , zsig2 , zsig3 ) |
|---|
| 731 | ENDIF |
|---|
| 732 | |
|---|
| 733 | ! --- SIMIP --- ! |
|---|
| 734 | IF ( iom_use( 'normstr' ) .OR. iom_use( 'sheastr' ) .OR. iom_use( 'dssh_dx' ) .OR. iom_use( 'dssh_dy' ) .OR. & |
|---|
| 735 | & iom_use( 'corstrx' ) .OR. iom_use( 'corstry' ) .OR. iom_use( 'intstrx' ) .OR. iom_use( 'intstry' ) .OR. & |
|---|
| 736 | & iom_use( 'utau_oi' ) .OR. iom_use( 'vtau_oi' ) .OR. iom_use( 'xmtrpice' ) .OR. iom_use( 'ymtrpice' ) .OR. & |
|---|
| 737 | & iom_use( 'xmtrpsnw' ) .OR. iom_use( 'ymtrpsnw' ) .OR. iom_use( 'xatrp' ) .OR. iom_use( 'yatrp' ) ) THEN |
|---|
| [8407] | 738 | |
|---|
| [8498] | 739 | ALLOCATE( zdiag_sig1 (jpi,jpj) , zdiag_sig2 (jpi,jpj) , zdiag_dssh_dx (jpi,jpj) , zdiag_dssh_dy (jpi,jpj) , & |
|---|
| 740 | & zdiag_corstrx (jpi,jpj) , zdiag_corstry (jpi,jpj) , zdiag_intstrx (jpi,jpj) , zdiag_intstry (jpi,jpj) , & |
|---|
| 741 | & zdiag_utau_oi (jpi,jpj) , zdiag_vtau_oi (jpi,jpj) , zdiag_xmtrp_ice(jpi,jpj) , zdiag_ymtrp_ice(jpi,jpj) , & |
|---|
| 742 | & zdiag_xmtrp_snw(jpi,jpj) , zdiag_ymtrp_snw(jpi,jpj) , zdiag_xatrp (jpi,jpj) , zdiag_yatrp (jpi,jpj) ) |
|---|
| 743 | |
|---|
| 744 | DO jj = 2, jpjm1 |
|---|
| 745 | DO ji = 2, jpim1 |
|---|
| 746 | rswitch = MAX( 0._wp , SIGN( 1._wp , at_i(ji,jj) - epsi06 ) ) ! 1 if ice, 0 if no ice |
|---|
| 747 | |
|---|
| 748 | ! Stress tensor invariants (normal and shear stress N/m) |
|---|
| 749 | zdiag_sig1(ji,jj) = ( zs1(ji,jj) + zs2(ji,jj) ) * rswitch ! normal stress |
|---|
| 750 | zdiag_sig2(ji,jj) = SQRT( ( zs1(ji,jj) - zs2(ji,jj) )**2 + 4*zs12(ji,jj)**2 ) * rswitch ! shear stress |
|---|
| 751 | |
|---|
| 752 | ! Stress terms of the momentum equation (N/m2) |
|---|
| 753 | zdiag_dssh_dx(ji,jj) = zspgU(ji,jj) * rswitch ! sea surface slope stress term |
|---|
| 754 | zdiag_dssh_dy(ji,jj) = zspgV(ji,jj) * rswitch |
|---|
| 755 | |
|---|
| 756 | zdiag_corstrx(ji,jj) = zCorx(ji,jj) * rswitch ! Coriolis stress term |
|---|
| 757 | zdiag_corstry(ji,jj) = zCory(ji,jj) * rswitch |
|---|
| 758 | |
|---|
| 759 | zdiag_intstrx(ji,jj) = zfU(ji,jj) * rswitch ! internal stress term |
|---|
| 760 | zdiag_intstry(ji,jj) = zfV(ji,jj) * rswitch |
|---|
| 761 | |
|---|
| 762 | zdiag_utau_oi(ji,jj) = ztaux_oi(ji,jj) * rswitch ! oceanic stress |
|---|
| 763 | zdiag_vtau_oi(ji,jj) = ztauy_oi(ji,jj) * rswitch |
|---|
| 764 | |
|---|
| 765 | ! 2D ice mass, snow mass, area transport arrays (X, Y) |
|---|
| 766 | zfac_x = 0.5 * u_ice(ji,jj) * e2u(ji,jj) * rswitch |
|---|
| 767 | zfac_y = 0.5 * v_ice(ji,jj) * e1v(ji,jj) * rswitch |
|---|
| 768 | |
|---|
| 769 | zdiag_xmtrp_ice(ji,jj) = rhoic * zfac_x * ( vt_i(ji+1,jj) + vt_i(ji,jj) ) ! ice mass transport, X-component |
|---|
| 770 | zdiag_ymtrp_ice(ji,jj) = rhoic * zfac_y * ( vt_i(ji,jj+1) + vt_i(ji,jj) ) ! '' Y- '' |
|---|
| 771 | |
|---|
| 772 | zdiag_xmtrp_snw(ji,jj) = rhosn * zfac_x * ( vt_s(ji+1,jj) + vt_s(ji,jj) ) ! snow mass transport, X-component |
|---|
| 773 | zdiag_ymtrp_snw(ji,jj) = rhosn * zfac_y * ( vt_s(ji,jj+1) + vt_s(ji,jj) ) ! '' Y- '' |
|---|
| 774 | |
|---|
| 775 | zdiag_xatrp(ji,jj) = zfac_x * ( at_i(ji+1,jj) + at_i(ji,jj) ) ! area transport, X-component |
|---|
| 776 | zdiag_yatrp(ji,jj) = zfac_y * ( at_i(ji,jj+1) + at_i(ji,jj) ) ! '' Y- '' |
|---|
| 777 | |
|---|
| 778 | END DO |
|---|
| [8407] | 779 | END DO |
|---|
| [8498] | 780 | |
|---|
| 781 | CALL lbc_lnk_multi( zdiag_sig1 , 'T', 1., zdiag_sig2 , 'T', 1., & |
|---|
| 782 | & zdiag_dssh_dx, 'U', -1., zdiag_dssh_dy, 'V', -1., & |
|---|
| 783 | & zdiag_corstrx, 'U', -1., zdiag_corstry, 'V', -1., & |
|---|
| 784 | & zdiag_intstrx, 'U', -1., zdiag_intstry, 'V', -1. ) |
|---|
| 785 | |
|---|
| 786 | CALL lbc_lnk_multi( zdiag_utau_oi, 'U', -1., zdiag_vtau_oi, 'V', -1. ) |
|---|
| 787 | |
|---|
| 788 | CALL lbc_lnk_multi( zdiag_xmtrp_ice, 'U', -1., zdiag_xmtrp_snw, 'U', -1., & |
|---|
| 789 | & zdiag_xatrp , 'U', -1., zdiag_ymtrp_ice, 'V', -1., & |
|---|
| 790 | & zdiag_ymtrp_snw, 'V', -1., zdiag_yatrp , 'V', -1. ) |
|---|
| 791 | |
|---|
| 792 | IF ( iom_use( 'normstr' ) ) CALL iom_put( 'normstr' , zdiag_sig1(:,:) ) ! Normal stress |
|---|
| 793 | IF ( iom_use( 'sheastr' ) ) CALL iom_put( 'sheastr' , zdiag_sig2(:,:) ) ! Shear stress |
|---|
| 794 | IF ( iom_use( 'dssh_dx' ) ) CALL iom_put( 'dssh_dx' , zdiag_dssh_dx(:,:) ) ! Sea-surface tilt term in force balance (x) |
|---|
| 795 | IF ( iom_use( 'dssh_dy' ) ) CALL iom_put( 'dssh_dy' , zdiag_dssh_dy(:,:) ) ! Sea-surface tilt term in force balance (y) |
|---|
| 796 | IF ( iom_use( 'corstrx' ) ) CALL iom_put( 'corstrx' , zdiag_corstrx(:,:) ) ! Coriolis force term in force balance (x) |
|---|
| 797 | IF ( iom_use( 'corstry' ) ) CALL iom_put( 'corstry' , zdiag_corstry(:,:) ) ! Coriolis force term in force balance (y) |
|---|
| 798 | IF ( iom_use( 'intstrx' ) ) CALL iom_put( 'intstrx' , zdiag_intstrx(:,:) ) ! Internal force term in force balance (x) |
|---|
| 799 | IF ( iom_use( 'intstry' ) ) CALL iom_put( 'intstry' , zdiag_intstry(:,:) ) ! Internal force term in force balance (y) |
|---|
| 800 | IF ( iom_use( 'utau_oi' ) ) CALL iom_put( 'utau_oi' , zdiag_utau_oi(:,:) ) ! Ocean stress term in force balance (x) |
|---|
| 801 | IF ( iom_use( 'vtau_oi' ) ) CALL iom_put( 'vtau_oi' , zdiag_vtau_oi(:,:) ) ! Ocean stress term in force balance (y) |
|---|
| 802 | IF ( iom_use( 'xmtrpice' ) ) CALL iom_put( 'xmtrpice' , zdiag_xmtrp_ice(:,:) ) ! X-component of sea-ice mass transport (kg/s) |
|---|
| 803 | IF ( iom_use( 'ymtrpice' ) ) CALL iom_put( 'ymtrpice' , zdiag_ymtrp_ice(:,:) ) ! Y-component of sea-ice mass transport |
|---|
| 804 | IF ( iom_use( 'xmtrpsnw' ) ) CALL iom_put( 'xmtrpsnw' , zdiag_xmtrp_snw(:,:) ) ! X-component of snow mass transport (kg/s) |
|---|
| 805 | IF ( iom_use( 'ymtrpsnw' ) ) CALL iom_put( 'ymtrpsnw' , zdiag_ymtrp_snw(:,:) ) ! Y-component of snow mass transport |
|---|
| 806 | IF ( iom_use( 'xatrp' ) ) CALL iom_put( 'xatrp' , zdiag_xatrp(:,:) ) ! X-component of ice area transport |
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| 807 | IF ( iom_use( 'yatrp' ) ) CALL iom_put( 'yatrp' , zdiag_yatrp(:,:) ) ! Y-component of ice area transport |
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| [8407] | 808 | |
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| [8498] | 809 | DEALLOCATE( zdiag_sig1 , zdiag_sig2 , zdiag_dssh_dx , zdiag_dssh_dy , & |
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| 810 | & zdiag_corstrx , zdiag_corstry , zdiag_intstrx , zdiag_intstry , & |
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| 811 | & zdiag_utau_oi , zdiag_vtau_oi , zdiag_xmtrp_ice , zdiag_ymtrp_ice , & |
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| 812 | & zdiag_xmtrp_snw , zdiag_ymtrp_snw , zdiag_xatrp , zdiag_yatrp ) |
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| [8407] | 813 | |
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| 814 | ENDIF |
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| 815 | ! |
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| 816 | END SUBROUTINE ice_rhg_evp |
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| 817 | |
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| [8486] | 818 | #else |
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| 819 | !!---------------------------------------------------------------------- |
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| 820 | !! Default option Empty module NO LIM-3 sea-ice model |
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| 821 | !!---------------------------------------------------------------------- |
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| [8407] | 822 | #endif |
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| 823 | |
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| 824 | !!============================================================================== |
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| 825 | END MODULE icerhg_evp |
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