[8586] | 1 | MODULE icedyn |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE icedyn *** |
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| 4 | !! Sea-Ice dynamics : master routine for sea ice dynamics |
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| 5 | !!====================================================================== |
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[9604] | 6 | !! history : 4.0 ! 2018 (C. Rousset) original code SI3 [aka Sea Ice cube] |
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[8586] | 7 | !!---------------------------------------------------------------------- |
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[9570] | 8 | #if defined key_si3 |
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[8586] | 9 | !!---------------------------------------------------------------------- |
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[9570] | 10 | !! 'key_si3' SI3 sea-ice model |
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[8586] | 11 | !!---------------------------------------------------------------------- |
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| 12 | !! ice_dyn : dynamics of sea ice |
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| 13 | !! ice_dyn_init : initialization and namelist read |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | USE phycst ! physical constants |
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| 16 | USE dom_oce ! ocean space and time domain |
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| 17 | USE ice ! sea-ice: variables |
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| 18 | USE icedyn_rhg ! sea-ice: rheology |
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| 19 | USE icedyn_adv ! sea-ice: advection |
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| 20 | USE icedyn_rdgrft ! sea-ice: ridging/rafting |
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| 21 | USE icecor ! sea-ice: corrections |
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| 22 | USE icevar ! sea-ice: operations |
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[10399] | 23 | USE icectl ! sea-ice: control prints |
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[8586] | 24 | ! |
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| 25 | USE in_out_manager ! I/O manager |
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| 26 | USE iom ! I/O manager library |
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| 27 | USE lib_mpp ! MPP library |
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| 28 | USE lib_fortran ! fortran utilities (glob_sum + no signed zero) |
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| 29 | USE lbclnk ! lateral boundary conditions (or mpp links) |
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| 30 | USE timing ! Timing |
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| 31 | |
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| 32 | IMPLICIT NONE |
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| 33 | PRIVATE |
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| 34 | |
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| 35 | PUBLIC ice_dyn ! called by icestp.F90 |
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| 36 | PUBLIC ice_dyn_init ! called by icestp.F90 |
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| 37 | |
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| 38 | INTEGER :: nice_dyn ! choice of the type of dynamics |
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| 39 | ! ! associated indices: |
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[10399] | 40 | INTEGER, PARAMETER :: np_dynALL = 1 ! full ice dynamics (rheology + advection + ridging/rafting + correction) |
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[9076] | 41 | INTEGER, PARAMETER :: np_dynRHGADV = 2 ! pure dynamics (rheology + advection) |
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[10399] | 42 | INTEGER, PARAMETER :: np_dynADV1D = 3 ! only advection 1D - test case from Schar & Smolarkiewicz 1996 |
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| 43 | INTEGER, PARAMETER :: np_dynADV2D = 4 ! only advection 2D w prescribed vel.(rn_uvice + advection) |
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[8586] | 44 | ! |
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| 45 | ! ** namelist (namdyn) ** |
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[10399] | 46 | LOGICAL :: ln_dynALL ! full ice dynamics (rheology + advection + ridging/rafting + correction) |
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| 47 | LOGICAL :: ln_dynRHGADV ! no ridge/raft & no corrections (rheology + advection) |
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| 48 | LOGICAL :: ln_dynADV1D ! only advection in 1D w ice convergence (test case from Schar & Smolarkiewicz 1996) |
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| 49 | LOGICAL :: ln_dynADV2D ! only advection in 2D w prescribed vel. (rn_uvice + advection) |
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| 50 | REAL(wp) :: rn_uice ! prescribed u-vel (case np_dynADV1D & np_dynADV2D) |
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| 51 | REAL(wp) :: rn_vice ! prescribed v-vel (case np_dynADV1D & np_dynADV2D) |
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[8586] | 52 | |
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| 53 | !! * Substitutions |
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| 54 | # include "vectopt_loop_substitute.h90" |
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| 55 | !!---------------------------------------------------------------------- |
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[9598] | 56 | !! NEMO/ICE 4.0 , NEMO Consortium (2018) |
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[8586] | 57 | !! $Id: icedyn.F90 8378 2017-07-26 13:55:59Z clem $ |
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[9598] | 58 | !! Software governed by the CeCILL licence (./LICENSE) |
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[8586] | 59 | !!---------------------------------------------------------------------- |
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| 60 | CONTAINS |
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| 61 | |
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| 62 | SUBROUTINE ice_dyn( kt ) |
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| 63 | !!------------------------------------------------------------------- |
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| 64 | !! *** ROUTINE ice_dyn *** |
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| 65 | !! |
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| 66 | !! ** Purpose : this routine manages sea ice dynamics |
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| 67 | !! |
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[9604] | 68 | !! ** Action : - calculation of friction in case of landfast ice |
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| 69 | !! - call ice_dyn_rhg = rheology |
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| 70 | !! - call ice_dyn_adv = advection |
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| 71 | !! - call ice_dyn_rdgrft = ridging/rafting |
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| 72 | !! - call ice_cor = corrections if fields are out of bounds |
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[8586] | 73 | !!-------------------------------------------------------------------- |
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| 74 | INTEGER, INTENT(in) :: kt ! ice time step |
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| 75 | !! |
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[10267] | 76 | INTEGER :: ji, jj, jl ! dummy loop indices |
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| 77 | REAL(wp) :: zcoefu, zcoefv |
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[10399] | 78 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zhi_max, zhs_max |
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[10267] | 79 | REAL(wp), ALLOCATABLE, DIMENSION(:,:) :: zdivu_i |
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[8586] | 80 | !!-------------------------------------------------------------------- |
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| 81 | ! |
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[10399] | 82 | ! controls |
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| 83 | IF( ln_timing ) CALL timing_start('icedyn') ! timing |
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| 84 | IF( ln_icediachk ) CALL ice_cons_hsm(0, 'icedyn', rdiag_v, rdiag_s, rdiag_t, rdiag_fv, rdiag_fs, rdiag_ft) ! conservation |
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[8586] | 85 | ! |
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| 86 | IF( kt == nit000 .AND. lwp ) THEN |
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| 87 | WRITE(numout,*) |
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| 88 | WRITE(numout,*)'ice_dyn: sea-ice dynamics' |
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| 89 | WRITE(numout,*)'~~~~~~~' |
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| 90 | ENDIF |
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| 91 | ! |
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[10312] | 92 | IF( ln_landfast_home ) THEN !-- Landfast ice parameterization |
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[8586] | 93 | tau_icebfr(:,:) = 0._wp |
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| 94 | DO jl = 1, jpl |
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[10399] | 95 | WHERE( h_i_b(:,:,jl) > ht_n(:,:) * rn_depfra ) tau_icebfr(:,:) = tau_icebfr(:,:) + a_i(:,:,jl) * rn_icebfr |
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[8586] | 96 | END DO |
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| 97 | ENDIF |
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[10312] | 98 | ! |
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[10399] | 99 | ! !-- Record max of the surrounding 9-pts ice thick. (for CALL Hbig) |
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[8586] | 100 | DO jl = 1, jpl |
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| 101 | DO jj = 2, jpjm1 |
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[10399] | 102 | DO ji = fs_2, fs_jpim1 |
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| 103 | zhi_max(ji,jj,jl) = MAX( epsi20, h_i_b(ji,jj,jl), h_i_b(ji+1,jj ,jl), h_i_b(ji ,jj+1,jl), & |
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| 104 | & h_i_b(ji-1,jj ,jl), h_i_b(ji ,jj-1,jl), & |
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| 105 | & h_i_b(ji+1,jj+1,jl), h_i_b(ji-1,jj-1,jl), & |
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| 106 | & h_i_b(ji+1,jj-1,jl), h_i_b(ji-1,jj+1,jl) ) |
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| 107 | zhs_max(ji,jj,jl) = MAX( epsi20, h_s_b(ji,jj,jl), h_s_b(ji+1,jj ,jl), h_s_b(ji ,jj+1,jl), & |
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| 108 | & h_s_b(ji-1,jj ,jl), h_s_b(ji ,jj-1,jl), & |
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| 109 | & h_s_b(ji+1,jj+1,jl), h_s_b(ji-1,jj-1,jl), & |
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| 110 | & h_s_b(ji+1,jj-1,jl), h_s_b(ji-1,jj+1,jl) ) |
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[8586] | 111 | END DO |
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| 112 | END DO |
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| 113 | END DO |
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[10399] | 114 | CALL lbc_lnk_multi( zhi_max(:,:,:), 'T', 1., zhs_max(:,:,:), 'T', 1. ) |
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[8586] | 115 | ! |
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| 116 | ! |
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| 117 | SELECT CASE( nice_dyn ) !-- Set which dynamics is running |
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| 118 | |
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[10399] | 119 | CASE ( np_dynALL ) !== all dynamical processes ==! |
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| 120 | CALL ice_dyn_rhg ( kt ) ! -- rheology |
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| 121 | CALL ice_dyn_adv ( kt ) ; CALL Hbig( zhi_max, zhs_max ) ! -- advection of ice + correction on ice thickness |
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| 122 | CALL ice_dyn_rdgrft( kt ) ! -- ridging/rafting |
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| 123 | CALL ice_cor ( kt , 1 ) ! -- Corrections |
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[8586] | 124 | |
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[9076] | 125 | CASE ( np_dynRHGADV ) !== no ridge/raft & no corrections ==! |
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[10399] | 126 | CALL ice_dyn_rhg ( kt ) ! -- rheology |
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| 127 | CALL ice_dyn_adv ( kt ) ; CALL Hbig( zhi_max, zhs_max ) ! -- advection of ice + correction on ice thickness |
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| 128 | CALL Hpiling ! -- simple pile-up (replaces ridging/rafting) |
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[8586] | 129 | |
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[10399] | 130 | CASE ( np_dynADV1D ) !== pure advection ==! (1D) |
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[10267] | 131 | ALLOCATE( zdivu_i(jpi,jpj) ) |
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[10399] | 132 | ! --- monotonicity test from Schar & Smolarkiewicz 1996 --- ! |
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| 133 | ! CFL = 0.5 at a distance from the bound of 1/6 of the basin length |
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| 134 | ! Then for dx = 2m and dt = 1s => rn_uice = u (1/6th) = 1m/s |
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| 135 | DO jj = 1, jpj |
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| 136 | DO ji = 1, jpi |
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| 137 | zcoefu = ( REAL(jpiglo+1)*0.5 - REAL(ji+nimpp-1) ) / ( REAL(jpiglo+1)*0.5 - 1. ) |
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| 138 | zcoefv = ( REAL(jpjglo+1)*0.5 - REAL(jj+njmpp-1) ) / ( REAL(jpjglo+1)*0.5 - 1. ) |
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| 139 | u_ice(ji,jj) = rn_uice * 1.5 * SIGN( 1., zcoefu ) * ABS( zcoefu ) * umask(ji,jj,1) |
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| 140 | v_ice(ji,jj) = rn_vice * 1.5 * SIGN( 1., zcoefv ) * ABS( zcoefv ) * vmask(ji,jj,1) |
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| 141 | END DO |
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| 142 | END DO |
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| 143 | ! --- |
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| 144 | CALL ice_dyn_adv ( kt ) ! -- advection of ice + correction on ice thickness |
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[10267] | 145 | |
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[10399] | 146 | ! diagnostics: divergence at T points |
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| 147 | DO jj = 2, jpjm1 |
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| 148 | DO ji = 2, jpim1 |
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| 149 | zdivu_i(ji,jj) = ( e2u(ji,jj) * u_ice(ji,jj) - e2u(ji-1,jj) * u_ice(ji-1,jj) & |
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| 150 | & + e1v(ji,jj) * v_ice(ji,jj) - e1v(ji,jj-1) * v_ice(ji,jj-1) ) * r1_e1e2t(ji,jj) |
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| 151 | END DO |
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| 152 | END DO |
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| 153 | CALL lbc_lnk( zdivu_i, 'T', 1. ) |
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| 154 | IF( iom_use('icediv') ) CALL iom_put( "icediv" , zdivu_i(:,:) ) |
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| 155 | |
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| 156 | DEALLOCATE( zdivu_i ) |
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| 157 | |
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| 158 | CASE ( np_dynADV2D ) !== pure advection ==! (2D w prescribed velocities) |
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| 159 | ALLOCATE( zdivu_i(jpi,jpj) ) |
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[8586] | 160 | u_ice(:,:) = rn_uice * umask(:,:,1) |
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| 161 | v_ice(:,:) = rn_vice * vmask(:,:,1) |
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[10267] | 162 | !CALL RANDOM_NUMBER(u_ice(:,:)) ; u_ice(:,:) = u_ice(:,:) * 0.1 + rn_uice * 0.9 * umask(:,:,1) |
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| 163 | !CALL RANDOM_NUMBER(v_ice(:,:)) ; v_ice(:,:) = v_ice(:,:) * 0.1 + rn_vice * 0.9 * vmask(:,:,1) |
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| 164 | ! --- |
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[10399] | 165 | CALL ice_dyn_adv ( kt ) ; CALL Hbig( zhi_max, zhs_max ) ! -- advection of ice + correction on ice thickness |
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[8586] | 166 | |
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[10267] | 167 | ! diagnostics: divergence at T points |
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| 168 | DO jj = 2, jpjm1 |
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| 169 | DO ji = 2, jpim1 |
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| 170 | zdivu_i(ji,jj) = ( e2u(ji,jj) * u_ice(ji,jj) - e2u(ji-1,jj) * u_ice(ji-1,jj) & |
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| 171 | & + e1v(ji,jj) * v_ice(ji,jj) - e1v(ji,jj-1) * v_ice(ji,jj-1) ) * r1_e1e2t(ji,jj) |
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| 172 | END DO |
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| 173 | END DO |
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| 174 | CALL lbc_lnk( zdivu_i, 'T', 1. ) |
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| 175 | IF( iom_use('icediv') ) CALL iom_put( "icediv" , zdivu_i(:,:) ) |
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| 176 | |
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| 177 | DEALLOCATE( zdivu_i ) |
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| 178 | |
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[8586] | 179 | END SELECT |
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[10399] | 180 | ! |
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| 181 | ! controls |
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| 182 | IF( ln_icediachk ) CALL ice_cons_hsm(1, 'icedyn', rdiag_v, rdiag_s, rdiag_t, rdiag_fv, rdiag_fs, rdiag_ft) ! conservation |
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| 183 | IF( ln_timing ) CALL timing_stop ('icedyn') ! timing |
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[8586] | 184 | ! |
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| 185 | END SUBROUTINE ice_dyn |
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| 186 | |
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[9124] | 187 | |
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[10399] | 188 | SUBROUTINE Hbig( phi_max, phs_max ) |
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[8586] | 189 | !!------------------------------------------------------------------- |
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| 190 | !! *** ROUTINE Hbig *** |
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| 191 | !! |
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| 192 | !! ** Purpose : Thickness correction in case advection scheme creates |
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[10399] | 193 | !! abnormally tick ice or snow |
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[8586] | 194 | !! |
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[10399] | 195 | !! ** Method : 1- check whether ice thickness is larger than the surrounding 9-points |
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| 196 | !! (before advection) and reduce it by adapting ice concentration |
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| 197 | !! 2- check whether snow thickness is larger than the surrounding 9-points |
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| 198 | !! (before advection) and reduce it by sending the excess in the ocean |
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| 199 | !! 3- check whether snow load deplets the snow-ice interface below sea level$ |
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| 200 | !! and reduce it by sending the excess in the ocean |
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| 201 | !! 4- correct pond fraction to avoid a_ip > a_i |
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[8586] | 202 | !! |
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| 203 | !! ** input : Max thickness of the surrounding 9-points |
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| 204 | !!------------------------------------------------------------------- |
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[10399] | 205 | REAL(wp), DIMENSION(:,:,:), INTENT(in) :: phi_max, phs_max ! max ice thick from surrounding 9-pts |
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[8586] | 206 | ! |
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| 207 | INTEGER :: ji, jj, jl ! dummy loop indices |
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[10399] | 208 | REAL(wp) :: zhi, zhs, zvs_excess, zfra |
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[8586] | 209 | !!------------------------------------------------------------------- |
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| 210 | ! |
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| 211 | CALL ice_var_zapsmall !-- zap small areas |
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| 212 | ! |
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| 213 | DO jl = 1, jpl |
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| 214 | DO jj = 1, jpj |
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| 215 | DO ji = 1, jpi |
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[10399] | 216 | IF ( v_i(ji,jj,jl) > 0._wp ) THEN |
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[8586] | 217 | ! |
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[10399] | 218 | ! ! -- check h_i -- ! |
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| 219 | ! if h_i is larger than the surrounding 9 pts => reduce h_i and increase a_i |
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| 220 | zhi = v_i (ji,jj,jl) / a_i(ji,jj,jl) |
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| 221 | !!clem zdv = v_i(ji,jj,jl) - v_i_b(ji,jj,jl) |
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| 222 | !!clem IF ( ( zdv > 0.0 .AND. zh > phmax(ji,jj,jl) .AND. at_i_b(ji,jj) < 0.80 ) .OR. & |
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| 223 | !!clem & ( zdv <= 0.0 .AND. zh > phmax(ji,jj,jl) ) ) THEN |
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| 224 | IF( zhi > phi_max(ji,jj,jl) .AND. a_i(ji,jj,jl) < 0.15 ) THEN |
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| 225 | a_i(ji,jj,jl) = v_i(ji,jj,jl) / MIN( phi_max(ji,jj,jl), hi_max(jpl) ) !-- bound h_i to hi_max (99 m) |
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| 226 | ENDIF |
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[8586] | 227 | ! |
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[10399] | 228 | ! ! -- check h_s -- ! |
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| 229 | ! if h_s is larger than the surrounding 9 pts => put the snow excess in the ocean |
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| 230 | zhs = v_s (ji,jj,jl) / a_i(ji,jj,jl) |
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| 231 | IF( v_s(ji,jj,jl) > 0._wp .AND. zhs > phs_max(ji,jj,jl) .AND. a_i(ji,jj,jl) < 0.15 ) THEN |
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| 232 | zfra = a_i(ji,jj,jl) * phs_max(ji,jj,jl) / MAX( v_s(ji,jj,jl), epsi20 ) |
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| 233 | ! |
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| 234 | wfx_res(ji,jj) = wfx_res(ji,jj) + ( v_s(ji,jj,jl) - a_i(ji,jj,jl) * phs_max(ji,jj,jl) ) * rhos * r1_rdtice |
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| 235 | hfx_res(ji,jj) = hfx_res(ji,jj) - e_s(ji,jj,1,jl) * ( 1._wp - zfra ) * r1_rdtice ! W.m-2 <0 |
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| 236 | ! |
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| 237 | e_s(ji,jj,1,jl) = e_s(ji,jj,1,jl) * zfra |
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| 238 | v_s(ji,jj,jl) = a_i(ji,jj,jl) * phs_max(ji,jj,jl) |
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| 239 | ENDIF |
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| 240 | ! |
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| 241 | ! ! -- check snow load -- ! |
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| 242 | ! if snow load makes snow-ice interface to deplet below the ocean surface => put the snow excess in the ocean |
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| 243 | ! this correction is crucial because of the call to routine icecor afterwards which imposes a mini of ice thick. (rn_himin) |
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| 244 | ! this imposed mini can artificially make the snow thickness very high (if concentration decreases drastically) |
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| 245 | zvs_excess = MAX( 0._wp, v_s(ji,jj,jl) - v_i(ji,jj,jl) * (rau0-rhoi) * r1_rhos ) |
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| 246 | IF( zvs_excess > 0._wp ) THEN |
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| 247 | zfra = zvs_excess / MAX( v_s(ji,jj,jl), epsi20 ) |
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| 248 | wfx_res(ji,jj) = wfx_res(ji,jj) + zvs_excess * rhos * r1_rdtice |
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| 249 | hfx_res(ji,jj) = hfx_res(ji,jj) - e_s(ji,jj,1,jl) * ( 1._wp - zfra ) * r1_rdtice ! W.m-2 <0 |
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| 250 | ! |
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| 251 | e_s(ji,jj,1,jl) = e_s(ji,jj,1,jl) * zfra |
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| 252 | v_s(ji,jj,jl) = v_s(ji,jj,jl) - zvs_excess |
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[8586] | 253 | ENDIF |
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[10399] | 254 | |
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[8586] | 255 | ENDIF |
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| 256 | END DO |
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| 257 | END DO |
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[8637] | 258 | END DO |
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| 259 | ! !-- correct pond fraction to avoid a_ip > a_i |
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| 260 | WHERE( a_ip(:,:,:) > a_i(:,:,:) ) a_ip(:,:,:) = a_i(:,:,:) |
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[8586] | 261 | ! |
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| 262 | END SUBROUTINE Hbig |
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| 263 | |
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[9124] | 264 | |
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[8586] | 265 | SUBROUTINE Hpiling |
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| 266 | !!------------------------------------------------------------------- |
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| 267 | !! *** ROUTINE Hpiling *** |
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| 268 | !! |
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| 269 | !! ** Purpose : Simple conservative piling comparable with 1-cat models |
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| 270 | !! |
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| 271 | !! ** Method : pile-up ice when no ridging/rafting |
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| 272 | !! |
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| 273 | !! ** input : a_i |
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| 274 | !!------------------------------------------------------------------- |
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| 275 | INTEGER :: jl ! dummy loop indices |
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| 276 | !!------------------------------------------------------------------- |
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| 277 | ! |
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| 278 | CALL ice_var_zapsmall !-- zap small areas |
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| 279 | ! |
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| 280 | at_i(:,:) = SUM( a_i(:,:,:), dim=3 ) |
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| 281 | DO jl = 1, jpl |
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| 282 | WHERE( at_i(:,:) > epsi20 ) |
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| 283 | a_i(:,:,jl) = a_i(:,:,jl) * ( 1._wp + MIN( rn_amax_2d(:,:) - at_i(:,:) , 0._wp ) / at_i(:,:) ) |
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| 284 | END WHERE |
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| 285 | END DO |
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| 286 | ! |
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| 287 | END SUBROUTINE Hpiling |
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| 288 | |
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[8637] | 289 | |
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[8586] | 290 | SUBROUTINE ice_dyn_init |
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| 291 | !!------------------------------------------------------------------- |
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| 292 | !! *** ROUTINE ice_dyn_init *** |
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| 293 | !! |
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| 294 | !! ** Purpose : Physical constants and parameters linked to the ice |
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| 295 | !! dynamics |
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| 296 | !! |
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| 297 | !! ** Method : Read the namdyn namelist and check the ice-dynamic |
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| 298 | !! parameter values called at the first timestep (nit000) |
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| 299 | !! |
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| 300 | !! ** input : Namelist namdyn |
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| 301 | !!------------------------------------------------------------------- |
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| 302 | INTEGER :: ios, ioptio ! Local integer output status for namelist read |
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| 303 | !! |
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[10399] | 304 | NAMELIST/namdyn/ ln_dynALL, ln_dynRHGADV, ln_dynADV1D, ln_dynADV2D, rn_uice, rn_vice, & |
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| 305 | & rn_ishlat , & |
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[10312] | 306 | & ln_landfast_L16, ln_landfast_home, rn_depfra, rn_icebfr, rn_lfrelax, rn_tensile |
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[8586] | 307 | !!------------------------------------------------------------------- |
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| 308 | ! |
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| 309 | REWIND( numnam_ice_ref ) ! Namelist namdyn in reference namelist : Ice dynamics |
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| 310 | READ ( numnam_ice_ref, namdyn, IOSTAT = ios, ERR = 901) |
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[9169] | 311 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namdyn in reference namelist', lwp ) |
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[8586] | 312 | REWIND( numnam_ice_cfg ) ! Namelist namdyn in configuration namelist : Ice dynamics |
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| 313 | READ ( numnam_ice_cfg, namdyn, IOSTAT = ios, ERR = 902 ) |
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[9169] | 314 | 902 IF( ios > 0 ) CALL ctl_nam ( ios , 'namdyn in configuration namelist', lwp ) |
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| 315 | IF(lwm) WRITE( numoni, namdyn ) |
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[8586] | 316 | ! |
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| 317 | IF(lwp) THEN ! control print |
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| 318 | WRITE(numout,*) |
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| 319 | WRITE(numout,*) 'ice_dyn_init: ice parameters for ice dynamics ' |
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| 320 | WRITE(numout,*) '~~~~~~~~~~~~' |
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| 321 | WRITE(numout,*) ' Namelist namdyn:' |
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[10399] | 322 | WRITE(numout,*) ' Full ice dynamics (rhg + adv + ridge/raft + corr) ln_dynALL = ', ln_dynALL |
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[10312] | 323 | WRITE(numout,*) ' No ridge/raft & No cor (rhg + adv) ln_dynRHGADV = ', ln_dynRHGADV |
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[10399] | 324 | WRITE(numout,*) ' Advection 1D only (Schar & Smolarkiewicz 1996) ln_dynADV1D = ', ln_dynADV1D |
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| 325 | WRITE(numout,*) ' Advection 2D only (rn_uvice + adv) ln_dynADV2D = ', ln_dynADV2D |
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[10312] | 326 | WRITE(numout,*) ' with prescribed velocity given by (u,v)_ice = (rn_uice,rn_vice) = (', rn_uice,',', rn_vice,')' |
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| 327 | WRITE(numout,*) ' lateral boundary condition for sea ice dynamics rn_ishlat = ', rn_ishlat |
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| 328 | WRITE(numout,*) ' Landfast: param from Lemieux 2016 ln_landfast_L16 = ', ln_landfast_L16 |
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| 329 | WRITE(numout,*) ' Landfast: param from home made ln_landfast_home= ', ln_landfast_home |
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| 330 | WRITE(numout,*) ' fraction of ocean depth that ice must reach rn_depfra = ', rn_depfra |
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| 331 | WRITE(numout,*) ' maximum bottom stress per unit area of contact rn_icebfr = ', rn_icebfr |
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| 332 | WRITE(numout,*) ' relax time scale (s-1) to reach static friction rn_lfrelax = ', rn_lfrelax |
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| 333 | WRITE(numout,*) ' isotropic tensile strength rn_tensile = ', rn_tensile |
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[9169] | 334 | WRITE(numout,*) |
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[8586] | 335 | ENDIF |
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| 336 | ! !== set the choice of ice dynamics ==! |
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| 337 | ioptio = 0 |
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| 338 | ! !--- full dynamics (rheology + advection + ridging/rafting + correction) |
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[10399] | 339 | IF( ln_dynALL ) THEN ; ioptio = ioptio + 1 ; nice_dyn = np_dynALL ; ENDIF |
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[8586] | 340 | ! !--- dynamics without ridging/rafting and corr (rheology + advection) |
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[9076] | 341 | IF( ln_dynRHGADV ) THEN ; ioptio = ioptio + 1 ; nice_dyn = np_dynRHGADV ; ENDIF |
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[10399] | 342 | ! !--- advection 1D only - test case from Schar & Smolarkiewicz 1996 |
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| 343 | IF( ln_dynADV1D ) THEN ; ioptio = ioptio + 1 ; nice_dyn = np_dynADV1D ; ENDIF |
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| 344 | ! !--- advection 2D only with prescribed ice velocities (from namelist) |
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| 345 | IF( ln_dynADV2D ) THEN ; ioptio = ioptio + 1 ; nice_dyn = np_dynADV2D ; ENDIF |
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[8586] | 346 | ! |
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| 347 | IF( ioptio /= 1 ) CALL ctl_stop( 'ice_dyn_init: one and only one ice dynamics option has to be defined ' ) |
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| 348 | ! |
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| 349 | ! !--- Lateral boundary conditions |
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| 350 | IF ( rn_ishlat == 0. ) THEN ; IF(lwp) WRITE(numout,*) ' ===>>> ice lateral free-slip' |
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| 351 | ELSEIF ( rn_ishlat == 2. ) THEN ; IF(lwp) WRITE(numout,*) ' ===>>> ice lateral no-slip' |
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| 352 | ELSEIF ( 0. < rn_ishlat .AND. rn_ishlat < 2. ) THEN ; IF(lwp) WRITE(numout,*) ' ===>>> ice lateral partial-slip' |
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| 353 | ELSEIF ( 2. < rn_ishlat ) THEN ; IF(lwp) WRITE(numout,*) ' ===>>> ice lateral strong-slip' |
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| 354 | ENDIF |
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[10312] | 355 | ! !--- Landfast ice |
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| 356 | IF( .NOT.ln_landfast_L16 .AND. .NOT.ln_landfast_home ) tau_icebfr(:,:) = 0._wp |
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[8586] | 357 | ! |
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[10312] | 358 | IF ( ln_landfast_L16 .AND. ln_landfast_home ) THEN |
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| 359 | CALL ctl_stop( 'ice_dyn_init: choose one and only one landfast parameterization (ln_landfast_L16 or ln_landfast_home)' ) |
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| 360 | ENDIF |
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| 361 | ! |
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[8586] | 362 | CALL ice_dyn_rdgrft_init ! set ice ridging/rafting parameters |
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| 363 | CALL ice_dyn_rhg_init ! set ice rheology parameters |
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| 364 | CALL ice_dyn_adv_init ! set ice advection parameters |
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| 365 | ! |
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| 366 | END SUBROUTINE ice_dyn_init |
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| 367 | |
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| 368 | #else |
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| 369 | !!---------------------------------------------------------------------- |
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[9570] | 370 | !! Default option Empty module NO SI3 sea-ice model |
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[8586] | 371 | !!---------------------------------------------------------------------- |
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| 372 | #endif |
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| 373 | |
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| 374 | !!====================================================================== |
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| 375 | END MODULE icedyn |
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