| [825] | 1 | MODULE limistate |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE limistate *** |
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| 4 | !! Initialisation of diagnostics ice variables |
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| 5 | !!====================================================================== |
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| [2528] | 6 | !! History : 2.0 ! 2004-01 (C. Ethe, G. Madec) Original code |
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| [4161] | 7 | !! 4.0 ! 2011-02 (G. Madec) dynamical allocation |
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| [4990] | 8 | !! - ! 2014 (C. Rousset) add N/S initializations |
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| [2528] | 9 | !!---------------------------------------------------------------------- |
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| [825] | 10 | #if defined key_lim3 |
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| 11 | !!---------------------------------------------------------------------- |
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| [834] | 12 | !! 'key_lim3' : LIM3 sea-ice model |
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| [825] | 13 | !!---------------------------------------------------------------------- |
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| 14 | !! lim_istate : Initialisation of diagnostics ice variables |
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| 15 | !! lim_istate_init : initialization of ice state and namelist read |
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| 16 | !!---------------------------------------------------------------------- |
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| [2528] | 17 | USE phycst ! physical constant |
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| 18 | USE oce ! dynamics and tracers variables |
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| 19 | USE dom_oce ! ocean domain |
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| 20 | USE sbc_oce ! Surface boundary condition: ocean fields |
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| [4161] | 21 | USE sbc_ice ! Surface boundary condition: ice fields |
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| [2528] | 22 | USE eosbn2 ! equation of state |
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| 23 | USE ice ! sea-ice variables |
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| [4161] | 24 | USE par_oce ! ocean parameters |
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| [2528] | 25 | USE dom_ice ! sea-ice domain |
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| [7993] | 26 | USE limvar ! lim_var_salprof |
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| [2528] | 27 | USE in_out_manager ! I/O manager |
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| [2715] | 28 | USE lib_mpp ! MPP library |
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| [4161] | 29 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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| [3294] | 30 | USE wrk_nemo ! work arrays |
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| [825] | 31 | |
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| 32 | IMPLICIT NONE |
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| 33 | PRIVATE |
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| 34 | |
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| [2528] | 35 | PUBLIC lim_istate ! routine called by lim_init.F90 |
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| [825] | 36 | |
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| [4166] | 37 | ! !!** init namelist (namiceini) ** |
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| [5123] | 38 | REAL(wp) :: rn_thres_sst ! threshold water temperature for initial sea ice |
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| 39 | REAL(wp) :: rn_hts_ini_n ! initial snow thickness in the north |
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| 40 | REAL(wp) :: rn_hts_ini_s ! initial snow thickness in the south |
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| 41 | REAL(wp) :: rn_hti_ini_n ! initial ice thickness in the north |
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| 42 | REAL(wp) :: rn_hti_ini_s ! initial ice thickness in the south |
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| 43 | REAL(wp) :: rn_ati_ini_n ! initial leads area in the north |
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| 44 | REAL(wp) :: rn_ati_ini_s ! initial leads area in the south |
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| 45 | REAL(wp) :: rn_smi_ini_n ! initial salinity |
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| 46 | REAL(wp) :: rn_smi_ini_s ! initial salinity |
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| 47 | REAL(wp) :: rn_tmi_ini_n ! initial temperature |
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| 48 | REAL(wp) :: rn_tmi_ini_s ! initial temperature |
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| [4166] | 49 | |
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| [5123] | 50 | LOGICAL :: ln_iceini ! initialization or not |
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| [825] | 51 | !!---------------------------------------------------------------------- |
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| [4161] | 52 | !! LIM 3.0, UCL-LOCEAN-IPSL (2008) |
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| [1156] | 53 | !! $Id$ |
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| [4161] | 54 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| [825] | 55 | !!---------------------------------------------------------------------- |
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| 56 | CONTAINS |
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| 57 | |
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| 58 | SUBROUTINE lim_istate |
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| 59 | !!------------------------------------------------------------------- |
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| 60 | !! *** ROUTINE lim_istate *** |
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| 61 | !! |
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| 62 | !! ** Purpose : defined the sea-ice initial state |
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| 63 | !! |
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| [4161] | 64 | !! ** Method : |
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| 65 | !! This routine will put some ice where ocean |
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| 66 | !! is at the freezing point, then fill in ice |
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| 67 | !! state variables using prescribed initial |
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| 68 | !! values in the namelist |
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| 69 | !! |
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| 70 | !! ** Steps : |
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| 71 | !! 1) Read namelist |
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| 72 | !! 2) Basal temperature; ice and hemisphere masks |
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| 73 | !! 3) Fill in the ice thickness distribution using gaussian |
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| 74 | !! 4) Fill in space-dependent arrays for state variables |
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| 75 | !! 5) Diagnostic arrays |
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| 76 | !! 6) Lateral boundary conditions |
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| 77 | !! |
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| [4333] | 78 | !! ** Notes : o_i, t_su, t_s, t_i, s_i must be filled everywhere, even |
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| [4990] | 79 | !! where there is no ice (clem: I do not know why, is it mandatory?) |
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| [4333] | 80 | !! |
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| [4161] | 81 | !! History : |
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| 82 | !! 2.0 ! 01-04 (C. Ethe, G. Madec) Original code |
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| 83 | !! 3.0 ! 2007 (M. Vancoppenolle) Rewrite for ice cats |
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| 84 | !! 4.0 ! 09-11 (M. Vancoppenolle) Enhanced version for ice cats |
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| 85 | !!-------------------------------------------------------------------- |
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| 86 | |
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| 87 | !! * Local variables |
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| 88 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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| [5123] | 89 | REAL(wp) :: ztmelts, zdh |
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| [4161] | 90 | INTEGER :: i_hemis, i_fill, jl0 |
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| 91 | REAL(wp) :: ztest_1, ztest_2, ztest_3, ztest_4, ztests, zsigma, zarg, zA, zV, zA_cons, zV_cons, zconv |
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| [4688] | 92 | REAL(wp), POINTER, DIMENSION(:) :: zht_i_ini, zat_i_ini, zvt_i_ini, zht_s_ini, zsm_i_ini, ztm_i_ini |
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| 93 | REAL(wp), POINTER, DIMENSION(:,:) :: zh_i_ini, za_i_ini, zv_i_ini |
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| 94 | REAL(wp), POINTER, DIMENSION(:,:) :: zswitch ! ice indicator |
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| [4161] | 95 | INTEGER, POINTER, DIMENSION(:,:) :: zhemis ! hemispheric index |
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| [825] | 96 | !-------------------------------------------------------------------- |
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| [921] | 97 | |
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| [4688] | 98 | CALL wrk_alloc( jpi, jpj, zswitch ) |
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| [4161] | 99 | CALL wrk_alloc( jpi, jpj, zhemis ) |
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| [4688] | 100 | CALL wrk_alloc( jpl, 2, zh_i_ini, za_i_ini, zv_i_ini ) |
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| 101 | CALL wrk_alloc( 2, zht_i_ini, zat_i_ini, zvt_i_ini, zht_s_ini, zsm_i_ini, ztm_i_ini ) |
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| [2715] | 102 | |
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| [4161] | 103 | IF(lwp) WRITE(numout,*) |
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| 104 | IF(lwp) WRITE(numout,*) 'lim_istate : Ice initialization ' |
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| 105 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ' |
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| 106 | |
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| [825] | 107 | !-------------------------------------------------------------------- |
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| [4161] | 108 | ! 1) Read namelist |
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| [825] | 109 | !-------------------------------------------------------------------- |
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| 110 | |
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| 111 | CALL lim_istate_init ! reading the initials parameters of the ice |
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| 112 | |
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| [4688] | 113 | ! surface temperature |
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| 114 | DO jl = 1, jpl ! loop over categories |
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| [5123] | 115 | t_su (:,:,jl) = rt0 * tmask(:,:,1) |
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| 116 | tn_ice(:,:,jl) = rt0 * tmask(:,:,1) |
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| [4688] | 117 | END DO |
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| 118 | |
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| [4990] | 119 | ! basal temperature (considered at freezing point) |
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| [6498] | 120 | CALL eos_fzp( sss_m(:,:), t_bo(:,:) ) |
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| 121 | t_bo(:,:) = ( t_bo(:,:) + rt0 ) * tmask(:,:,1) |
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| [4990] | 122 | |
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| [5123] | 123 | IF( ln_iceini ) THEN |
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| [4688] | 124 | |
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| [825] | 125 | !-------------------------------------------------------------------- |
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| [4161] | 126 | ! 2) Basal temperature, ice mask and hemispheric index |
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| [825] | 127 | !-------------------------------------------------------------------- |
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| [4990] | 128 | |
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| 129 | DO jj = 1, jpj ! ice if sst <= t-freez + ttest |
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| [1037] | 130 | DO ji = 1, jpi |
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| [5407] | 131 | IF( ( sst_m(ji,jj) - ( t_bo(ji,jj) - rt0 ) ) * tmask(ji,jj,1) >= rn_thres_sst ) THEN |
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| [5123] | 132 | zswitch(ji,jj) = 0._wp * tmask(ji,jj,1) ! no ice |
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| [4765] | 133 | ELSE |
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| [5123] | 134 | zswitch(ji,jj) = 1._wp * tmask(ji,jj,1) ! ice |
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| [1037] | 135 | ENDIF |
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| 136 | END DO |
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| 137 | END DO |
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| 138 | |
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| 139 | |
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| [4161] | 140 | ! Hemispheric index |
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| [825] | 141 | DO jj = 1, jpj |
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| 142 | DO ji = 1, jpi |
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| [2528] | 143 | IF( fcor(ji,jj) >= 0._wp ) THEN |
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| [4161] | 144 | zhemis(ji,jj) = 1 ! Northern hemisphere |
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| 145 | ELSE |
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| 146 | zhemis(ji,jj) = 2 ! Southern hemisphere |
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| 147 | ENDIF |
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| 148 | END DO |
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| 149 | END DO |
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| [825] | 150 | |
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| [4161] | 151 | !-------------------------------------------------------------------- |
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| 152 | ! 3) Initialization of sea ice state variables |
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| 153 | !-------------------------------------------------------------------- |
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| [825] | 154 | |
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| [4161] | 155 | !----------------------------- |
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| 156 | ! 3.1) Hemisphere-dependent arrays |
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| 157 | !----------------------------- |
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| [4688] | 158 | ! assign initial thickness, concentration, snow depth and salinity to an hemisphere-dependent array |
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| [5123] | 159 | zht_i_ini(1) = rn_hti_ini_n ; zht_i_ini(2) = rn_hti_ini_s ! ice thickness |
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| 160 | zht_s_ini(1) = rn_hts_ini_n ; zht_s_ini(2) = rn_hts_ini_s ! snow depth |
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| 161 | zat_i_ini(1) = rn_ati_ini_n ; zat_i_ini(2) = rn_ati_ini_s ! ice concentration |
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| 162 | zsm_i_ini(1) = rn_smi_ini_n ; zsm_i_ini(2) = rn_smi_ini_s ! bulk ice salinity |
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| 163 | ztm_i_ini(1) = rn_tmi_ini_n ; ztm_i_ini(2) = rn_tmi_ini_s ! temperature (ice and snow) |
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| [825] | 164 | |
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| [4688] | 165 | zvt_i_ini(:) = zht_i_ini(:) * zat_i_ini(:) ! ice volume |
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| 166 | |
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| [4161] | 167 | !--------------------------------------------------------------------- |
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| 168 | ! 3.2) Distribute ice concentration and thickness into the categories |
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| 169 | !--------------------------------------------------------------------- |
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| 170 | ! a gaussian distribution for ice concentration is used |
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| 171 | ! then we check whether the distribution fullfills |
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| 172 | ! volume and area conservation, positivity and ice categories bounds |
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| 173 | DO i_hemis = 1, 2 |
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| [825] | 174 | |
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| [4161] | 175 | ztest_1 = 0 ; ztest_2 = 0 ; ztest_3 = 0 ; ztest_4 = 0 |
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| [825] | 176 | |
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| [4161] | 177 | ! note for the great nemo engineers: |
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| 178 | ! only very few of the WRITE statements are necessary for the reference version |
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| 179 | ! they were one day useful, but now i personally doubt of their |
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| 180 | ! potential for bringing anything useful |
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| [825] | 181 | |
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| [4161] | 182 | DO i_fill = jpl, 1, -1 |
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| 183 | IF ( ( ztest_1 + ztest_2 + ztest_3 + ztest_4 ) .NE. 4 ) THEN |
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| 184 | !---------------------------- |
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| 185 | ! fill the i_fill categories |
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| 186 | !---------------------------- |
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| 187 | ! *** 1 category to fill |
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| 188 | IF ( i_fill .EQ. 1 ) THEN |
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| [4688] | 189 | zh_i_ini(1,i_hemis) = zht_i_ini(i_hemis) |
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| 190 | za_i_ini(1,i_hemis) = zat_i_ini(i_hemis) |
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| 191 | zh_i_ini(2:jpl,i_hemis) = 0._wp |
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| 192 | za_i_ini(2:jpl,i_hemis) = 0._wp |
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| [4161] | 193 | ELSE |
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| [825] | 194 | |
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| [4688] | 195 | ! *** >1 categores to fill |
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| 196 | !--- Ice thicknesses in the i_fill - 1 first categories |
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| [4161] | 197 | DO jl = 1, i_fill - 1 |
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| [5123] | 198 | zh_i_ini(jl,i_hemis) = hi_mean(jl) |
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| [4161] | 199 | END DO |
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| [4688] | 200 | |
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| 201 | !--- jl0: most likely index where cc will be maximum |
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| [825] | 202 | DO jl = 1, jpl |
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| [5123] | 203 | IF ( ( zht_i_ini(i_hemis) > hi_max(jl-1) ) .AND. & |
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| 204 | & ( zht_i_ini(i_hemis) <= hi_max(jl) ) ) THEN |
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| [4161] | 205 | jl0 = jl |
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| 206 | ENDIF |
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| 207 | END DO |
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| 208 | jl0 = MIN(jl0, i_fill) |
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| [4688] | 209 | |
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| 210 | !--- Concentrations |
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| [4161] | 211 | za_i_ini(jl0,i_hemis) = zat_i_ini(i_hemis) / SQRT(REAL(jpl)) |
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| 212 | DO jl = 1, i_fill - 1 |
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| 213 | IF ( jl .NE. jl0 ) THEN |
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| [4688] | 214 | zsigma = 0.5 * zht_i_ini(i_hemis) |
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| 215 | zarg = ( zh_i_ini(jl,i_hemis) - zht_i_ini(i_hemis) ) / zsigma |
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| [4161] | 216 | za_i_ini(jl,i_hemis) = za_i_ini(jl0,i_hemis) * EXP(-zarg**2) |
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| 217 | ENDIF |
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| [4688] | 218 | END DO |
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| 219 | |
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| [4161] | 220 | zA = 0. ! sum of the areas in the jpl categories |
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| 221 | DO jl = 1, i_fill - 1 |
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| 222 | zA = zA + za_i_ini(jl,i_hemis) |
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| 223 | END DO |
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| 224 | za_i_ini(i_fill,i_hemis) = zat_i_ini(i_hemis) - zA ! ice conc in the last category |
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| 225 | IF ( i_fill .LT. jpl ) za_i_ini(i_fill+1:jpl, i_hemis) = 0._wp |
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| 226 | |
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| [4688] | 227 | !--- Ice thickness in the last category |
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| [4161] | 228 | zV = 0. ! sum of the volumes of the N-1 categories |
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| 229 | DO jl = 1, i_fill - 1 |
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| [4688] | 230 | zV = zV + za_i_ini(jl,i_hemis)*zh_i_ini(jl,i_hemis) |
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| [4161] | 231 | END DO |
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| [4688] | 232 | zh_i_ini(i_fill,i_hemis) = ( zvt_i_ini(i_hemis) - zV ) / za_i_ini(i_fill,i_hemis) |
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| 233 | IF ( i_fill .LT. jpl ) zh_i_ini(i_fill+1:jpl, i_hemis) = 0._wp |
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| [825] | 234 | |
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| [4688] | 235 | !--- volumes |
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| 236 | zv_i_ini(:,i_hemis) = za_i_ini(:,i_hemis) * zh_i_ini(:,i_hemis) |
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| [4161] | 237 | IF ( i_fill .LT. jpl ) zv_i_ini(i_fill+1:jpl, i_hemis) = 0._wp |
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| [921] | 238 | |
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| [4161] | 239 | ENDIF ! i_fill |
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| [825] | 240 | |
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| [4161] | 241 | !--------------------- |
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| 242 | ! Compatibility tests |
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| 243 | !--------------------- |
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| 244 | ! Test 1: area conservation |
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| 245 | zA_cons = SUM(za_i_ini(:,i_hemis)) ; zconv = ABS(zat_i_ini(i_hemis) - zA_cons ) |
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| 246 | IF ( zconv .LT. 1.0e-6 ) THEN |
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| 247 | ztest_1 = 1 |
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| 248 | ELSE |
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| 249 | ztest_1 = 0 |
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| 250 | ENDIF |
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| [825] | 251 | |
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| [4161] | 252 | ! Test 2: volume conservation |
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| 253 | zV_cons = SUM(zv_i_ini(:,i_hemis)) |
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| 254 | zconv = ABS(zvt_i_ini(i_hemis) - zV_cons) |
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| [825] | 255 | |
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| [4161] | 256 | IF ( zconv .LT. 1.0e-6 ) THEN |
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| 257 | ztest_2 = 1 |
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| 258 | ELSE |
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| 259 | ztest_2 = 0 |
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| 260 | ENDIF |
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| [825] | 261 | |
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| [4161] | 262 | ! Test 3: thickness of the last category is in-bounds ? |
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| [5123] | 263 | IF ( zh_i_ini(i_fill, i_hemis) > hi_max(i_fill-1) ) THEN |
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| [4161] | 264 | ztest_3 = 1 |
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| 265 | ELSE |
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| 266 | ztest_3 = 0 |
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| 267 | ENDIF |
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| [825] | 268 | |
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| [4161] | 269 | ! Test 4: positivity of ice concentrations |
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| 270 | ztest_4 = 1 |
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| 271 | DO jl = 1, jpl |
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| 272 | IF ( za_i_ini(jl,i_hemis) .LT. 0._wp ) THEN |
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| 273 | ztest_4 = 0 |
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| [825] | 274 | ENDIF |
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| [4161] | 275 | END DO |
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| [825] | 276 | |
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| [4161] | 277 | ENDIF ! ztest_1 + ztest_2 + ztest_3 + ztest_4 |
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| 278 | |
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| 279 | ztests = ztest_1 + ztest_2 + ztest_3 + ztest_4 |
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| [825] | 280 | |
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| [4161] | 281 | END DO ! i_fill |
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| [825] | 282 | |
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| [4161] | 283 | IF(lwp) THEN |
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| [4908] | 284 | WRITE(numout,*) ' ztests : ', ztests |
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| [4161] | 285 | IF ( ztests .NE. 4 ) THEN |
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| 286 | WRITE(numout,*) |
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| [4908] | 287 | WRITE(numout,*) ' !!!! ALERT !!! ' |
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| 288 | WRITE(numout,*) ' !!!! Something is wrong in the LIM3 initialization procedure ' |
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| [4161] | 289 | WRITE(numout,*) |
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| [4908] | 290 | WRITE(numout,*) ' *** ztests is not equal to 4 ' |
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| 291 | WRITE(numout,*) ' *** ztest_i (i=1,4) = ', ztest_1, ztest_2, ztest_3, ztest_4 |
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| 292 | WRITE(numout,*) ' zat_i_ini : ', zat_i_ini(i_hemis) |
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| 293 | WRITE(numout,*) ' zht_i_ini : ', zht_i_ini(i_hemis) |
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| [4161] | 294 | ENDIF ! ztests .NE. 4 |
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| 295 | ENDIF |
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| 296 | |
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| 297 | END DO ! i_hemis |
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| [825] | 298 | |
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| [4161] | 299 | !--------------------------------------------------------------------- |
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| 300 | ! 3.3) Space-dependent arrays for ice state variables |
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| 301 | !--------------------------------------------------------------------- |
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| [825] | 302 | |
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| [4333] | 303 | ! Ice concentration, thickness and volume, ice salinity, ice age, surface temperature |
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| [4161] | 304 | DO jl = 1, jpl ! loop over categories |
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| 305 | DO jj = 1, jpj |
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| 306 | DO ji = 1, jpi |
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| [4688] | 307 | a_i(ji,jj,jl) = zswitch(ji,jj) * za_i_ini (jl,zhemis(ji,jj)) ! concentration |
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| [5202] | 308 | ht_i(ji,jj,jl) = zswitch(ji,jj) * zh_i_ini(jl,zhemis(ji,jj)) ! ice thickness |
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| [4688] | 309 | ht_s(ji,jj,jl) = ht_i(ji,jj,jl) * ( zht_s_ini( zhemis(ji,jj) ) / zht_i_ini( zhemis(ji,jj) ) ) ! snow depth |
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| [5202] | 310 | sm_i(ji,jj,jl) = zswitch(ji,jj) * zsm_i_ini(zhemis(ji,jj)) ! salinity |
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| 311 | o_i(ji,jj,jl) = zswitch(ji,jj) * 1._wp ! age (1 day) |
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| [5123] | 312 | t_su(ji,jj,jl) = zswitch(ji,jj) * ztm_i_ini(zhemis(ji,jj)) + ( 1._wp - zswitch(ji,jj) ) * rt0 ! surf temp |
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| [4333] | 313 | |
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| 314 | ! This case below should not be used if (ht_s/ht_i) is ok in namelist |
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| 315 | ! In case snow load is in excess that would lead to transformation from snow to ice |
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| 316 | ! Then, transfer the snow excess into the ice (different from limthd_dh) |
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| 317 | zdh = MAX( 0._wp, ( rhosn * ht_s(ji,jj,jl) + ( rhoic - rau0 ) * ht_i(ji,jj,jl) ) * r1_rau0 ) |
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| 318 | ! recompute ht_i, ht_s avoiding out of bounds values |
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| 319 | ht_i(ji,jj,jl) = MIN( hi_max(jl), ht_i(ji,jj,jl) + zdh ) |
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| [5123] | 320 | ht_s(ji,jj,jl) = MAX( 0._wp, ht_s(ji,jj,jl) - zdh * rhoic * r1_rhosn ) |
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| [4333] | 321 | |
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| 322 | ! ice volume, salt content, age content |
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| [4161] | 323 | v_i(ji,jj,jl) = ht_i(ji,jj,jl) * a_i(ji,jj,jl) ! ice volume |
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| 324 | v_s(ji,jj,jl) = ht_s(ji,jj,jl) * a_i(ji,jj,jl) ! snow volume |
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| 325 | smv_i(ji,jj,jl) = MIN( sm_i(ji,jj,jl) , sss_m(ji,jj) ) * v_i(ji,jj,jl) ! salt content |
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| 326 | oa_i(ji,jj,jl) = o_i(ji,jj,jl) * a_i(ji,jj,jl) ! age content |
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| [5202] | 327 | END DO |
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| 328 | END DO |
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| 329 | END DO |
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| [825] | 330 | |
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| [7993] | 331 | ! for constant salinity in time |
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| 332 | IF( nn_icesal == 1 .OR. nn_icesal == 3 ) THEN |
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| 333 | CALL lim_var_salprof |
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| 334 | smv_i = sm_i * v_i |
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| 335 | ENDIF |
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| 336 | |
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| [4161] | 337 | ! Snow temperature and heat content |
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| 338 | DO jk = 1, nlay_s |
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| 339 | DO jl = 1, jpl ! loop over categories |
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| 340 | DO jj = 1, jpj |
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| 341 | DO ji = 1, jpi |
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| [5123] | 342 | t_s(ji,jj,jk,jl) = zswitch(ji,jj) * ztm_i_ini(zhemis(ji,jj)) + ( 1._wp - zswitch(ji,jj) ) * rt0 |
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| [4161] | 343 | ! Snow energy of melting |
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| [5123] | 344 | e_s(ji,jj,jk,jl) = zswitch(ji,jj) * rhosn * ( cpic * ( rt0 - t_s(ji,jj,jk,jl) ) + lfus ) |
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| 345 | |
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| 346 | ! Mutliply by volume, and divide by number of layers to get heat content in J/m2 |
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| 347 | e_s(ji,jj,jk,jl) = e_s(ji,jj,jk,jl) * v_s(ji,jj,jl) * r1_nlay_s |
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| [5202] | 348 | END DO |
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| 349 | END DO |
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| 350 | END DO |
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| 351 | END DO |
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| [825] | 352 | |
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| [4161] | 353 | ! Ice salinity, temperature and heat content |
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| 354 | DO jk = 1, nlay_i |
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| 355 | DO jl = 1, jpl ! loop over categories |
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| 356 | DO jj = 1, jpj |
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| 357 | DO ji = 1, jpi |
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| [5123] | 358 | t_i(ji,jj,jk,jl) = zswitch(ji,jj) * ztm_i_ini(zhemis(ji,jj)) + ( 1._wp - zswitch(ji,jj) ) * rt0 |
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| 359 | s_i(ji,jj,jk,jl) = zswitch(ji,jj) * zsm_i_ini(zhemis(ji,jj)) !+ ( 1._wp - zswitch(ji,jj) ) * rn_simin |
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| 360 | ztmelts = - tmut * s_i(ji,jj,jk,jl) + rt0 !Melting temperature in K |
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| [825] | 361 | |
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| [4161] | 362 | ! heat content per unit volume |
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| [4688] | 363 | e_i(ji,jj,jk,jl) = zswitch(ji,jj) * rhoic * ( cpic * ( ztmelts - t_i(ji,jj,jk,jl) ) & |
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| [5123] | 364 | + lfus * ( 1._wp - (ztmelts-rt0) / MIN((t_i(ji,jj,jk,jl)-rt0),-epsi20) ) & |
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| 365 | - rcp * ( ztmelts - rt0 ) ) |
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| [825] | 366 | |
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| [5123] | 367 | ! Mutliply by ice volume, and divide by number of layers to get heat content in J/m2 |
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| 368 | e_i(ji,jj,jk,jl) = e_i(ji,jj,jk,jl) * v_i(ji,jj,jl) * r1_nlay_i |
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| [5202] | 369 | END DO |
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| 370 | END DO |
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| 371 | END DO |
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| 372 | END DO |
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| [825] | 373 | |
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| [4688] | 374 | tn_ice (:,:,:) = t_su (:,:,:) |
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| 375 | |
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| 376 | ELSE |
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| [5123] | 377 | ! if ln_iceini=false |
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| [4688] | 378 | a_i (:,:,:) = 0._wp |
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| 379 | v_i (:,:,:) = 0._wp |
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| 380 | v_s (:,:,:) = 0._wp |
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| 381 | smv_i(:,:,:) = 0._wp |
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| 382 | oa_i (:,:,:) = 0._wp |
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| 383 | ht_i (:,:,:) = 0._wp |
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| 384 | ht_s (:,:,:) = 0._wp |
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| 385 | sm_i (:,:,:) = 0._wp |
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| 386 | o_i (:,:,:) = 0._wp |
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| 387 | |
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| 388 | e_i(:,:,:,:) = 0._wp |
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| 389 | e_s(:,:,:,:) = 0._wp |
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| 390 | |
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| 391 | DO jl = 1, jpl |
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| 392 | DO jk = 1, nlay_i |
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| [5123] | 393 | t_i(:,:,jk,jl) = rt0 * tmask(:,:,1) |
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| [4688] | 394 | END DO |
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| 395 | DO jk = 1, nlay_s |
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| [5123] | 396 | t_s(:,:,jk,jl) = rt0 * tmask(:,:,1) |
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| [4688] | 397 | END DO |
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| 398 | END DO |
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| 399 | |
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| [5123] | 400 | ENDIF ! ln_iceini |
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| [4688] | 401 | |
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| 402 | at_i (:,:) = 0.0_wp |
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| 403 | DO jl = 1, jpl |
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| 404 | at_i (:,:) = at_i (:,:) + a_i (:,:,jl) |
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| 405 | END DO |
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| 406 | ! |
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| [825] | 407 | !-------------------------------------------------------------------- |
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| [4161] | 408 | ! 4) Global ice variables for output diagnostics | |
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| [825] | 409 | !-------------------------------------------------------------------- |
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| [4161] | 410 | u_ice (:,:) = 0._wp |
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| 411 | v_ice (:,:) = 0._wp |
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| 412 | stress1_i(:,:) = 0._wp |
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| 413 | stress2_i(:,:) = 0._wp |
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| 414 | stress12_i(:,:) = 0._wp |
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| [825] | 415 | |
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| 416 | !-------------------------------------------------------------------- |
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| [4161] | 417 | ! 5) Moments for advection |
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| [825] | 418 | !-------------------------------------------------------------------- |
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| 419 | |
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| [4161] | 420 | sxopw (:,:) = 0._wp |
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| 421 | syopw (:,:) = 0._wp |
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| 422 | sxxopw(:,:) = 0._wp |
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| 423 | syyopw(:,:) = 0._wp |
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| 424 | sxyopw(:,:) = 0._wp |
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| [3610] | 425 | |
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| [4161] | 426 | sxice (:,:,:) = 0._wp ; sxsn (:,:,:) = 0._wp ; sxa (:,:,:) = 0._wp |
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| 427 | syice (:,:,:) = 0._wp ; sysn (:,:,:) = 0._wp ; sya (:,:,:) = 0._wp |
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| 428 | sxxice(:,:,:) = 0._wp ; sxxsn(:,:,:) = 0._wp ; sxxa (:,:,:) = 0._wp |
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| 429 | syyice(:,:,:) = 0._wp ; syysn(:,:,:) = 0._wp ; syya (:,:,:) = 0._wp |
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| 430 | sxyice(:,:,:) = 0._wp ; sxysn(:,:,:) = 0._wp ; sxya (:,:,:) = 0._wp |
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| [825] | 431 | |
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| [4161] | 432 | sxc0 (:,:,:) = 0._wp ; sxe (:,:,:,:)= 0._wp |
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| 433 | syc0 (:,:,:) = 0._wp ; sye (:,:,:,:)= 0._wp |
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| 434 | sxxc0 (:,:,:) = 0._wp ; sxxe (:,:,:,:)= 0._wp |
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| 435 | syyc0 (:,:,:) = 0._wp ; syye (:,:,:,:)= 0._wp |
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| 436 | sxyc0 (:,:,:) = 0._wp ; sxye (:,:,:,:)= 0._wp |
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| [825] | 437 | |
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| [4161] | 438 | sxsal (:,:,:) = 0._wp |
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| 439 | sysal (:,:,:) = 0._wp |
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| 440 | sxxsal (:,:,:) = 0._wp |
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| 441 | syysal (:,:,:) = 0._wp |
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| 442 | sxysal (:,:,:) = 0._wp |
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| [825] | 443 | |
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| [4335] | 444 | sxage (:,:,:) = 0._wp |
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| 445 | syage (:,:,:) = 0._wp |
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| 446 | sxxage (:,:,:) = 0._wp |
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| 447 | syyage (:,:,:) = 0._wp |
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| 448 | sxyage (:,:,:) = 0._wp |
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| 449 | |
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| [825] | 450 | |
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| [4688] | 451 | CALL wrk_dealloc( jpi, jpj, zswitch ) |
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| [4161] | 452 | CALL wrk_dealloc( jpi, jpj, zhemis ) |
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| [4688] | 453 | CALL wrk_dealloc( jpl, 2, zh_i_ini, za_i_ini, zv_i_ini ) |
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| 454 | CALL wrk_dealloc( 2, zht_i_ini, zat_i_ini, zvt_i_ini, zht_s_ini, zsm_i_ini, ztm_i_ini ) |
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| [4161] | 455 | |
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| [825] | 456 | END SUBROUTINE lim_istate |
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| 457 | |
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| 458 | SUBROUTINE lim_istate_init |
|---|
| 459 | !!------------------------------------------------------------------- |
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| 460 | !! *** ROUTINE lim_istate_init *** |
|---|
| 461 | !! |
|---|
| 462 | !! ** Purpose : Definition of initial state of the ice |
|---|
| 463 | !! |
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| [4161] | 464 | !! ** Method : Read the namiceini namelist and check the parameter |
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| 465 | !! values called at the first timestep (nit000) |
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| [825] | 466 | !! |
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| [4161] | 467 | !! ** input : |
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| 468 | !! Namelist namiceini |
|---|
| 469 | !! |
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| 470 | !! history : |
|---|
| 471 | !! 8.5 ! 03-08 (C. Ethe) original code |
|---|
| 472 | !! 8.5 ! 07-11 (M. Vancoppenolle) rewritten initialization |
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| [825] | 473 | !!----------------------------------------------------------------------------- |
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| [5123] | 474 | NAMELIST/namiceini/ ln_iceini, rn_thres_sst, rn_hts_ini_n, rn_hts_ini_s, rn_hti_ini_n, rn_hti_ini_s, & |
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| 475 | & rn_ati_ini_n, rn_ati_ini_s, rn_smi_ini_n, rn_smi_ini_s, rn_tmi_ini_n, rn_tmi_ini_s |
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| [4147] | 476 | INTEGER :: ios ! Local integer output status for namelist read |
|---|
| [825] | 477 | !!----------------------------------------------------------------------------- |
|---|
| [2528] | 478 | ! |
|---|
| [4147] | 479 | REWIND( numnam_ice_ref ) ! Namelist namiceini in reference namelist : Ice initial state |
|---|
| 480 | READ ( numnam_ice_ref, namiceini, IOSTAT = ios, ERR = 901) |
|---|
| 481 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namiceini in reference namelist', lwp ) |
|---|
| 482 | |
|---|
| 483 | REWIND( numnam_ice_cfg ) ! Namelist namiceini in configuration namelist : Ice initial state |
|---|
| 484 | READ ( numnam_ice_cfg, namiceini, IOSTAT = ios, ERR = 902 ) |
|---|
| 485 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namiceini in configuration namelist', lwp ) |
|---|
| [4624] | 486 | IF(lwm) WRITE ( numoni, namiceini ) |
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| [4161] | 487 | |
|---|
| 488 | ! Define the initial parameters |
|---|
| 489 | ! ------------------------- |
|---|
| 490 | |
|---|
| 491 | IF(lwp) THEN |
|---|
| [825] | 492 | WRITE(numout,*) |
|---|
| 493 | WRITE(numout,*) 'lim_istate_init : ice parameters inititialisation ' |
|---|
| 494 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
|---|
| [5123] | 495 | WRITE(numout,*) ' initialization with ice (T) or not (F) ln_iceini = ', ln_iceini |
|---|
| 496 | WRITE(numout,*) ' threshold water temp. for initial sea-ice rn_thres_sst = ', rn_thres_sst |
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| 497 | WRITE(numout,*) ' initial snow thickness in the north rn_hts_ini_n = ', rn_hts_ini_n |
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| 498 | WRITE(numout,*) ' initial snow thickness in the south rn_hts_ini_s = ', rn_hts_ini_s |
|---|
| 499 | WRITE(numout,*) ' initial ice thickness in the north rn_hti_ini_n = ', rn_hti_ini_n |
|---|
| 500 | WRITE(numout,*) ' initial ice thickness in the south rn_hti_ini_s = ', rn_hti_ini_s |
|---|
| 501 | WRITE(numout,*) ' initial ice concentr. in the north rn_ati_ini_n = ', rn_ati_ini_n |
|---|
| 502 | WRITE(numout,*) ' initial ice concentr. in the north rn_ati_ini_s = ', rn_ati_ini_s |
|---|
| 503 | WRITE(numout,*) ' initial ice salinity in the north rn_smi_ini_n = ', rn_smi_ini_n |
|---|
| 504 | WRITE(numout,*) ' initial ice salinity in the south rn_smi_ini_s = ', rn_smi_ini_s |
|---|
| 505 | WRITE(numout,*) ' initial ice/snw temp in the north rn_tmi_ini_n = ', rn_tmi_ini_n |
|---|
| 506 | WRITE(numout,*) ' initial ice/snw temp in the south rn_tmi_ini_s = ', rn_tmi_ini_s |
|---|
| [825] | 507 | ENDIF |
|---|
| [4161] | 508 | |
|---|
| [825] | 509 | END SUBROUTINE lim_istate_init |
|---|
| 510 | |
|---|
| 511 | #else |
|---|
| 512 | !!---------------------------------------------------------------------- |
|---|
| 513 | !! Default option : Empty module NO LIM sea-ice model |
|---|
| 514 | !!---------------------------------------------------------------------- |
|---|
| 515 | CONTAINS |
|---|
| 516 | SUBROUTINE lim_istate ! Empty routine |
|---|
| 517 | END SUBROUTINE lim_istate |
|---|
| 518 | #endif |
|---|
| 519 | |
|---|
| 520 | !!====================================================================== |
|---|
| 521 | END MODULE limistate |
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