[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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[7278] | 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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[6140] | 31 | USE fldread ! read input fields |
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| 32 | USE iom |
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[825] | 33 | |
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| 34 | IMPLICIT NONE |
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| 35 | PRIVATE |
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| 36 | |
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[2528] | 37 | PUBLIC lim_istate ! routine called by lim_init.F90 |
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[825] | 38 | |
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[4166] | 39 | ! !!** init namelist (namiceini) ** |
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[5123] | 40 | REAL(wp) :: rn_thres_sst ! threshold water temperature for initial sea ice |
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| 41 | REAL(wp) :: rn_hts_ini_n ! initial snow thickness in the north |
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| 42 | REAL(wp) :: rn_hts_ini_s ! initial snow thickness in the south |
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| 43 | REAL(wp) :: rn_hti_ini_n ! initial ice thickness in the north |
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| 44 | REAL(wp) :: rn_hti_ini_s ! initial ice thickness in the south |
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| 45 | REAL(wp) :: rn_ati_ini_n ! initial leads area in the north |
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| 46 | REAL(wp) :: rn_ati_ini_s ! initial leads area in the south |
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| 47 | REAL(wp) :: rn_smi_ini_n ! initial salinity |
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| 48 | REAL(wp) :: rn_smi_ini_s ! initial salinity |
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| 49 | REAL(wp) :: rn_tmi_ini_n ! initial temperature |
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| 50 | REAL(wp) :: rn_tmi_ini_s ! initial temperature |
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[4166] | 51 | |
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[6140] | 52 | INTEGER , PARAMETER :: jpfldi = 6 ! maximum number of files to read |
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| 53 | INTEGER , PARAMETER :: jp_hti = 1 ! index of ice thickness (m) at T-point |
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| 54 | INTEGER , PARAMETER :: jp_hts = 2 ! index of snow thicknes (m) at T-point |
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| 55 | INTEGER , PARAMETER :: jp_ati = 3 ! index of ice fraction (%) at T-point |
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| 56 | INTEGER , PARAMETER :: jp_tsu = 4 ! index of ice surface temp (K) at T-point |
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| 57 | INTEGER , PARAMETER :: jp_tmi = 5 ! index of ice temp at T-point |
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| 58 | INTEGER , PARAMETER :: jp_smi = 6 ! index of ice sali at T-point |
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| 59 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: si ! structure of input fields (file informations, fields read) |
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| 60 | |
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| 61 | LOGICAL :: ln_iceini ! initialization or not |
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| 62 | LOGICAL :: ln_iceini_file ! Ice initialization state from 2D netcdf file |
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[825] | 63 | !!---------------------------------------------------------------------- |
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[4161] | 64 | !! LIM 3.0, UCL-LOCEAN-IPSL (2008) |
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[1156] | 65 | !! $Id$ |
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[4161] | 66 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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[825] | 67 | !!---------------------------------------------------------------------- |
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| 68 | CONTAINS |
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| 69 | |
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| 70 | SUBROUTINE lim_istate |
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| 71 | !!------------------------------------------------------------------- |
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| 72 | !! *** ROUTINE lim_istate *** |
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| 73 | !! |
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| 74 | !! ** Purpose : defined the sea-ice initial state |
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| 75 | !! |
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[4161] | 76 | !! ** Method : |
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| 77 | !! This routine will put some ice where ocean |
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| 78 | !! is at the freezing point, then fill in ice |
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| 79 | !! state variables using prescribed initial |
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| 80 | !! values in the namelist |
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| 81 | !! |
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| 82 | !! ** Steps : |
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| 83 | !! 1) Read namelist |
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| 84 | !! 2) Basal temperature; ice and hemisphere masks |
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| 85 | !! 3) Fill in the ice thickness distribution using gaussian |
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| 86 | !! 4) Fill in space-dependent arrays for state variables |
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| 87 | !! 5) Diagnostic arrays |
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| 88 | !! 6) Lateral boundary conditions |
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| 89 | !! |
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[4333] | 90 | !! ** Notes : o_i, t_su, t_s, t_i, s_i must be filled everywhere, even |
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[4990] | 91 | !! where there is no ice (clem: I do not know why, is it mandatory?) |
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[4333] | 92 | !! |
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[4161] | 93 | !! History : |
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| 94 | !! 2.0 ! 01-04 (C. Ethe, G. Madec) Original code |
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| 95 | !! 3.0 ! 2007 (M. Vancoppenolle) Rewrite for ice cats |
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| 96 | !! 4.0 ! 09-11 (M. Vancoppenolle) Enhanced version for ice cats |
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| 97 | !!-------------------------------------------------------------------- |
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| 98 | |
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| 99 | !! * Local variables |
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| 100 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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[5123] | 101 | REAL(wp) :: ztmelts, zdh |
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[4161] | 102 | INTEGER :: i_hemis, i_fill, jl0 |
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[6140] | 103 | 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] | 104 | REAL(wp), POINTER, DIMENSION(:,:) :: zswitch ! ice indicator |
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[6140] | 105 | REAL(wp), POINTER, DIMENSION(:,:) :: zht_i_ini, zat_i_ini, zvt_i_ini !data from namelist or nc file |
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| 106 | REAL(wp), POINTER, DIMENSION(:,:) :: zts_u_ini, zht_s_ini, zsm_i_ini, ztm_i_ini !data from namelist or nc file |
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| 107 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zh_i_ini, za_i_ini, zv_i_ini !data by cattegories to fill |
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[825] | 108 | !-------------------------------------------------------------------- |
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[921] | 109 | |
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[6140] | 110 | CALL wrk_alloc( jpi, jpj, jpl, zh_i_ini, za_i_ini, zv_i_ini ) |
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| 111 | CALL wrk_alloc( jpi, jpj, zht_i_ini, zat_i_ini, zvt_i_ini, zts_u_ini, zht_s_ini, zsm_i_ini, ztm_i_ini ) |
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| 112 | CALL wrk_alloc( jpi, jpj, zswitch ) |
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[2715] | 113 | |
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[4161] | 114 | IF(lwp) WRITE(numout,*) |
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| 115 | IF(lwp) WRITE(numout,*) 'lim_istate : Ice initialization ' |
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| 116 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ' |
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| 117 | |
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[825] | 118 | !-------------------------------------------------------------------- |
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[4161] | 119 | ! 1) Read namelist |
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[825] | 120 | !-------------------------------------------------------------------- |
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| 121 | |
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| 122 | CALL lim_istate_init ! reading the initials parameters of the ice |
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| 123 | |
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[4688] | 124 | ! surface temperature |
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| 125 | DO jl = 1, jpl ! loop over categories |
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[5123] | 126 | t_su (:,:,jl) = rt0 * tmask(:,:,1) |
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| 127 | tn_ice(:,:,jl) = rt0 * tmask(:,:,1) |
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[4688] | 128 | END DO |
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| 129 | |
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[4990] | 130 | ! basal temperature (considered at freezing point) |
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[5541] | 131 | CALL eos_fzp( sss_m(:,:), t_bo(:,:) ) |
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| 132 | t_bo(:,:) = ( t_bo(:,:) + rt0 ) * tmask(:,:,1) |
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[4990] | 133 | |
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[6140] | 134 | |
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[5123] | 135 | IF( ln_iceini ) THEN |
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[4688] | 136 | |
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[6140] | 137 | !-------------------------------------------------------------------- |
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| 138 | ! 2) Basal temperature, ice mask and hemispheric index |
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| 139 | !-------------------------------------------------------------------- |
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[4990] | 140 | |
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[6140] | 141 | DO jj = 1, jpj ! ice if sst <= t-freez + ttest |
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| 142 | DO ji = 1, jpi |
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| 143 | IF( ( sst_m(ji,jj) - ( t_bo(ji,jj) - rt0 ) ) * tmask(ji,jj,1) >= rn_thres_sst ) THEN |
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| 144 | zswitch(ji,jj) = 0._wp * tmask(ji,jj,1) ! no ice |
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| 145 | ELSE |
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| 146 | zswitch(ji,jj) = 1._wp * tmask(ji,jj,1) ! ice |
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| 147 | ENDIF |
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| 148 | END DO |
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[1037] | 149 | END DO |
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| 150 | |
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[6140] | 151 | !-------------------------------------------------------------------- |
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| 152 | ! 3) Initialization of sea ice state variables |
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| 153 | !-------------------------------------------------------------------- |
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| 154 | IF( ln_iceini_file )THEN |
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[1037] | 155 | |
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[6140] | 156 | zht_i_ini(:,:) = si(jp_hti)%fnow(:,:,1) |
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| 157 | zht_s_ini(:,:) = si(jp_hts)%fnow(:,:,1) |
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| 158 | zat_i_ini(:,:) = si(jp_ati)%fnow(:,:,1) |
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| 159 | zts_u_ini(:,:) = si(jp_tsu)%fnow(:,:,1) |
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| 160 | ztm_i_ini(:,:) = si(jp_tmi)%fnow(:,:,1) |
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| 161 | zsm_i_ini(:,:) = si(jp_smi)%fnow(:,:,1) |
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[825] | 162 | |
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[6140] | 163 | ELSE ! ln_iceini_file = F |
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[825] | 164 | |
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[6140] | 165 | !----------------------------- |
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| 166 | ! 3.1) Hemisphere-dependent arrays |
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| 167 | !----------------------------- |
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| 168 | ! assign initial thickness, concentration, snow depth and salinity to an hemisphere-dependent array |
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| 169 | DO jj = 1, jpj |
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| 170 | DO ji = 1, jpi |
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[7277] | 171 | IF( ff_t(ji,jj) >= 0._wp ) THEN |
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[6140] | 172 | zht_i_ini(ji,jj) = rn_hti_ini_n |
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| 173 | zht_s_ini(ji,jj) = rn_hts_ini_n |
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| 174 | zat_i_ini(ji,jj) = rn_ati_ini_n |
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| 175 | zts_u_ini(ji,jj) = rn_tmi_ini_n |
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| 176 | zsm_i_ini(ji,jj) = rn_smi_ini_n |
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| 177 | ztm_i_ini(ji,jj) = rn_tmi_ini_n |
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| 178 | ELSE |
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| 179 | zht_i_ini(ji,jj) = rn_hti_ini_s |
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| 180 | zht_s_ini(ji,jj) = rn_hts_ini_s |
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| 181 | zat_i_ini(ji,jj) = rn_ati_ini_s |
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| 182 | zts_u_ini(ji,jj) = rn_tmi_ini_s |
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| 183 | zsm_i_ini(ji,jj) = rn_smi_ini_s |
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| 184 | ztm_i_ini(ji,jj) = rn_tmi_ini_s |
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| 185 | ENDIF |
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| 186 | END DO |
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| 187 | END DO |
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[825] | 188 | |
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[6140] | 189 | ENDIF ! ln_iceini_file |
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[4688] | 190 | |
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[6140] | 191 | zvt_i_ini(:,:) = zht_i_ini(:,:) * zat_i_ini(:,:) ! ice volume |
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[825] | 192 | |
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[6140] | 193 | !--------------------------------------------------------------------- |
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| 194 | ! 3.2) Distribute ice concentration and thickness into the categories |
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| 195 | !--------------------------------------------------------------------- |
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| 196 | ! a gaussian distribution for ice concentration is used |
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| 197 | ! then we check whether the distribution fullfills |
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| 198 | ! volume and area conservation, positivity and ice categories bounds |
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| 199 | zh_i_ini(:,:,:) = 0._wp |
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| 200 | za_i_ini(:,:,:) = 0._wp |
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| 201 | zv_i_ini(:,:,:) = 0._wp |
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[825] | 202 | |
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[6140] | 203 | DO jj = 1, jpj |
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| 204 | DO ji = 1, jpi |
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[825] | 205 | |
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[6140] | 206 | IF( zat_i_ini(ji,jj) > 0._wp .AND. zht_i_ini(ji,jj) > 0._wp )THEN |
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[825] | 207 | |
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[6140] | 208 | ztest_1 = 0 ; ztest_2 = 0 ; ztest_3 = 0 ; ztest_4 = 0 |
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| 209 | ! ztests = 0 |
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| 210 | |
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| 211 | DO i_fill = jpl, 1, -1 |
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| 212 | |
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| 213 | ! IF( ztests .NE. 4 ) THEN |
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| 214 | IF ( ( ztest_1 + ztest_2 + ztest_3 + ztest_4 ) .NE. 4 ) THEN |
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| 215 | !---------------------------- |
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| 216 | ! fill the i_fill categories |
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| 217 | !---------------------------- |
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| 218 | ! *** 1 category to fill |
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| 219 | IF ( i_fill .EQ. 1 ) THEN |
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| 220 | zh_i_ini(ji,jj, 1) = zht_i_ini(ji,jj) |
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| 221 | za_i_ini(ji,jj, 1) = zat_i_ini(ji,jj) |
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| 222 | zh_i_ini(ji,jj,2:jpl) = 0._wp |
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| 223 | za_i_ini(ji,jj,2:jpl) = 0._wp |
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| 224 | ELSE |
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| 225 | |
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| 226 | ! *** >1 categores to fill |
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| 227 | !--- Ice thicknesses in the i_fill - 1 first categories |
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| 228 | DO jl = 1, i_fill - 1 |
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| 229 | zh_i_ini(ji,jj,jl) = hi_mean(jl) |
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| 230 | END DO |
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[4688] | 231 | |
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[6140] | 232 | !--- jl0: most likely index where cc will be maximum |
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| 233 | DO jl = 1, jpl |
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| 234 | IF ( ( zht_i_ini(ji,jj) > hi_max(jl-1) ) .AND. & |
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| 235 | & ( zht_i_ini(ji,jj) <= hi_max(jl) ) ) THEN |
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| 236 | jl0 = jl |
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| 237 | ENDIF |
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| 238 | END DO |
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| 239 | jl0 = MIN(jl0, i_fill) |
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[4688] | 240 | |
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[6140] | 241 | !--- Concentrations |
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| 242 | za_i_ini(ji,jj,jl0) = zat_i_ini(ji,jj) / SQRT(REAL(jpl)) |
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| 243 | DO jl = 1, i_fill - 1 |
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| 244 | IF( jl .NE. jl0 )THEN |
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| 245 | zsigma = 0.5 * zht_i_ini(ji,jj) |
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| 246 | zarg = ( zh_i_ini(ji,jj,jl) - zht_i_ini(ji,jj) ) / zsigma |
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| 247 | za_i_ini(ji,jj,jl) = za_i_ini(ji,jj,jl0) * EXP(-zarg**2) |
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| 248 | ENDIF |
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| 249 | END DO |
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[4688] | 250 | |
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[6140] | 251 | zA = 0. ! sum of the areas in the jpl categories |
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| 252 | DO jl = 1, i_fill - 1 |
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| 253 | zA = zA + za_i_ini(ji,jj,jl) |
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| 254 | END DO |
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| 255 | za_i_ini(ji,jj,i_fill) = zat_i_ini(ji,jj) - zA ! ice conc in the last category |
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| 256 | IF ( i_fill .LT. jpl ) za_i_ini(ji,jj,i_fill+1:jpl) = 0._wp |
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[4161] | 257 | |
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[6140] | 258 | !--- Ice thickness in the last category |
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| 259 | zV = 0. ! sum of the volumes of the N-1 categories |
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| 260 | DO jl = 1, i_fill - 1 |
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| 261 | zV = zV + za_i_ini(ji,jj,jl)*zh_i_ini(ji,jj,jl) |
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| 262 | END DO |
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| 263 | zh_i_ini(ji,jj,i_fill) = ( zvt_i_ini(ji,jj) - zV ) / za_i_ini(ji,jj,i_fill) |
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| 264 | IF ( i_fill .LT. jpl ) zh_i_ini(ji,jj,i_fill+1:jpl) = 0._wp |
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[825] | 265 | |
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[6140] | 266 | !--- volumes |
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| 267 | zv_i_ini(ji,jj,:) = za_i_ini(ji,jj,:) * zh_i_ini(ji,jj,:) |
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| 268 | IF ( i_fill .LT. jpl ) zv_i_ini(ji,jj,i_fill+1:jpl) = 0._wp |
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[921] | 269 | |
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[6140] | 270 | ENDIF ! i_fill |
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[825] | 271 | |
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[6140] | 272 | !--------------------- |
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| 273 | ! Compatibility tests |
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| 274 | !--------------------- |
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| 275 | ! Test 1: area conservation |
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| 276 | zA_cons = SUM(za_i_ini(ji,jj,:)) ; zconv = ABS(zat_i_ini(ji,jj) - zA_cons ) |
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| 277 | IF ( zconv .LT. 1.0e-6 ) THEN |
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| 278 | ztest_1 = 1 |
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| 279 | ELSE |
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| 280 | ztest_1 = 0 |
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| 281 | ENDIF |
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[825] | 282 | |
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[6140] | 283 | ! Test 2: volume conservation |
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| 284 | zV_cons = SUM(zv_i_ini(ji,jj,:)) |
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| 285 | zconv = ABS(zvt_i_ini(ji,jj) - zV_cons) |
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[825] | 286 | |
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[6140] | 287 | IF( zconv .LT. 1.0e-6 ) THEN |
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| 288 | ztest_2 = 1 |
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| 289 | ELSE |
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| 290 | ztest_2 = 0 |
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| 291 | ENDIF |
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[825] | 292 | |
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[6140] | 293 | ! Test 3: thickness of the last category is in-bounds ? |
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| 294 | IF ( zh_i_ini(ji,jj,i_fill) > hi_max(i_fill-1) ) THEN |
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| 295 | ztest_3 = 1 |
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| 296 | ELSE |
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| 297 | ztest_3 = 0 |
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| 298 | ENDIF |
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[825] | 299 | |
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[6140] | 300 | ! Test 4: positivity of ice concentrations |
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| 301 | ztest_4 = 1 |
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| 302 | DO jl = 1, jpl |
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| 303 | IF ( za_i_ini(ji,jj,jl) .LT. 0._wp ) THEN |
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| 304 | ztest_4 = 0 |
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| 305 | ENDIF |
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| 306 | END DO |
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[825] | 307 | |
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[6140] | 308 | ENDIF ! ztest_1 + ztest_2 + ztest_3 + ztest_4 |
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[4161] | 309 | |
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[6140] | 310 | ztests = ztest_1 + ztest_2 + ztest_3 + ztest_4 |
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[825] | 311 | |
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[6140] | 312 | END DO ! i_fill |
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[825] | 313 | |
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[6140] | 314 | IF(lwp) THEN |
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| 315 | WRITE(numout,*) ' ztests : ', ztests |
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| 316 | IF( ztests .NE. 4 )THEN |
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| 317 | WRITE(numout,*) |
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| 318 | WRITE(numout,*) ' !!!! ALERT !!! ' |
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| 319 | WRITE(numout,*) ' !!!! Something is wrong in the LIM3 initialization procedure ' |
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| 320 | WRITE(numout,*) |
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| 321 | WRITE(numout,*) ' *** ztests is not equal to 4 ' |
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| 322 | WRITE(numout,*) ' *** ztest_i (i=1,4) = ', ztest_1, ztest_2, ztest_3, ztest_4 |
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| 323 | WRITE(numout,*) ' zat_i_ini : ', zat_i_ini(ji,jj) |
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| 324 | WRITE(numout,*) ' zht_i_ini : ', zht_i_ini(ji,jj) |
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| 325 | ENDIF ! ztests .NE. 4 |
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| 326 | ENDIF |
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[4161] | 327 | |
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[6140] | 328 | ENDIF ! zat_i_ini(ji,jj) > 0._wp .AND. zhm_i_ini(ji,jj) > 0._wp |
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[825] | 329 | |
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[6140] | 330 | ENDDO |
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| 331 | ENDDO |
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[825] | 332 | |
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[6140] | 333 | !--------------------------------------------------------------------- |
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| 334 | ! 3.3) Space-dependent arrays for ice state variables |
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| 335 | !--------------------------------------------------------------------- |
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[4333] | 336 | |
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[6140] | 337 | ! Ice concentration, thickness and volume, ice salinity, ice age, surface temperature |
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| 338 | DO jl = 1, jpl ! loop over categories |
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| 339 | DO jj = 1, jpj |
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| 340 | DO ji = 1, jpi |
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| 341 | a_i(ji,jj,jl) = zswitch(ji,jj) * za_i_ini(ji,jj,jl) ! concentration |
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| 342 | ht_i(ji,jj,jl) = zswitch(ji,jj) * zh_i_ini(ji,jj,jl) ! ice thickness |
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| 343 | sm_i(ji,jj,jl) = zswitch(ji,jj) * zsm_i_ini(ji,jj) ! salinity |
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| 344 | o_i(ji,jj,jl) = zswitch(ji,jj) * 1._wp ! age (1 day) |
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| 345 | t_su(ji,jj,jl) = zswitch(ji,jj) * zts_u_ini(ji,jj) + ( 1._wp - zswitch(ji,jj) ) * rt0 ! surf temp |
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[4333] | 346 | |
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[6140] | 347 | IF( zht_i_ini(ji,jj) > 0._wp )THEN |
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| 348 | ht_s(ji,jj,jl)= ht_i(ji,jj,jl) * ( zht_s_ini(ji,jj) / zht_i_ini(ji,jj) ) ! snow depth |
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| 349 | ELSE |
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| 350 | ht_s(ji,jj,jl)= 0._wp |
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| 351 | ENDIF |
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| 352 | |
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| 353 | ! This case below should not be used if (ht_s/ht_i) is ok in namelist |
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| 354 | ! In case snow load is in excess that would lead to transformation from snow to ice |
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| 355 | ! Then, transfer the snow excess into the ice (different from limthd_dh) |
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| 356 | zdh = MAX( 0._wp, ( rhosn * ht_s(ji,jj,jl) + ( rhoic - rau0 ) * ht_i(ji,jj,jl) ) * r1_rau0 ) |
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| 357 | ! recompute ht_i, ht_s avoiding out of bounds values |
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| 358 | ht_i(ji,jj,jl) = MIN( hi_max(jl), ht_i(ji,jj,jl) + zdh ) |
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| 359 | ht_s(ji,jj,jl) = MAX( 0._wp, ht_s(ji,jj,jl) - zdh * rhoic * r1_rhosn ) |
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| 360 | |
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| 361 | ! ice volume, salt content, age content |
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| 362 | v_i(ji,jj,jl) = ht_i(ji,jj,jl) * a_i(ji,jj,jl) ! ice volume |
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| 363 | v_s(ji,jj,jl) = ht_s(ji,jj,jl) * a_i(ji,jj,jl) ! snow volume |
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| 364 | 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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| 365 | oa_i(ji,jj,jl) = o_i(ji,jj,jl) * a_i(ji,jj,jl) ! age content |
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| 366 | END DO |
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[5202] | 367 | END DO |
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| 368 | END DO |
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[825] | 369 | |
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[7278] | 370 | ! for constant salinity in time |
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| 371 | IF( nn_icesal == 1 .OR. nn_icesal == 3 ) THEN |
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| 372 | CALL lim_var_salprof |
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| 373 | smv_i = sm_i * v_i |
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| 374 | ENDIF |
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| 375 | |
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[6140] | 376 | ! Snow temperature and heat content |
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| 377 | DO jk = 1, nlay_s |
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| 378 | DO jl = 1, jpl ! loop over categories |
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| 379 | DO jj = 1, jpj |
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| 380 | DO ji = 1, jpi |
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| 381 | t_s(ji,jj,jk,jl) = zswitch(ji,jj) * ztm_i_ini(ji,jj) + ( 1._wp - zswitch(ji,jj) ) * rt0 |
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| 382 | ! Snow energy of melting |
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| 383 | e_s(ji,jj,jk,jl) = zswitch(ji,jj) * rhosn * ( cpic * ( rt0 - t_s(ji,jj,jk,jl) ) + lfus ) |
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[5123] | 384 | |
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[6140] | 385 | ! Mutliply by volume, and divide by number of layers to get heat content in J/m2 |
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| 386 | e_s(ji,jj,jk,jl) = e_s(ji,jj,jk,jl) * v_s(ji,jj,jl) * r1_nlay_s |
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| 387 | END DO |
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[5202] | 388 | END DO |
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| 389 | END DO |
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| 390 | END DO |
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[825] | 391 | |
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[6140] | 392 | ! Ice salinity, temperature and heat content |
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| 393 | DO jk = 1, nlay_i |
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| 394 | DO jl = 1, jpl ! loop over categories |
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| 395 | DO jj = 1, jpj |
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| 396 | DO ji = 1, jpi |
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| 397 | t_i(ji,jj,jk,jl) = zswitch(ji,jj) * ztm_i_ini(ji,jj) + ( 1._wp - zswitch(ji,jj) ) * rt0 |
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| 398 | s_i(ji,jj,jk,jl) = zswitch(ji,jj) * zsm_i_ini(ji,jj) + ( 1._wp - zswitch(ji,jj) ) * rn_simin |
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| 399 | ztmelts = - tmut * s_i(ji,jj,jk,jl) + rt0 !Melting temperature in K |
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[825] | 400 | |
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[6140] | 401 | ! heat content per unit volume |
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| 402 | e_i(ji,jj,jk,jl) = zswitch(ji,jj) * rhoic * ( cpic * ( ztmelts - t_i(ji,jj,jk,jl) ) & |
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| 403 | + lfus * ( 1._wp - (ztmelts-rt0) / MIN((t_i(ji,jj,jk,jl)-rt0),-epsi20) ) & |
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| 404 | - rcp * ( ztmelts - rt0 ) ) |
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[825] | 405 | |
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[6140] | 406 | ! Mutliply by ice volume, and divide by number of layers to get heat content in J/m2 |
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| 407 | e_i(ji,jj,jk,jl) = e_i(ji,jj,jk,jl) * v_i(ji,jj,jl) * r1_nlay_i |
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| 408 | END DO |
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[5202] | 409 | END DO |
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| 410 | END DO |
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| 411 | END DO |
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[825] | 412 | |
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[6140] | 413 | tn_ice (:,:,:) = t_su (:,:,:) |
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[4688] | 414 | |
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[6140] | 415 | ELSE ! if ln_iceini=false |
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[4688] | 416 | a_i (:,:,:) = 0._wp |
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| 417 | v_i (:,:,:) = 0._wp |
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| 418 | v_s (:,:,:) = 0._wp |
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| 419 | smv_i(:,:,:) = 0._wp |
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| 420 | oa_i (:,:,:) = 0._wp |
---|
| 421 | ht_i (:,:,:) = 0._wp |
---|
| 422 | ht_s (:,:,:) = 0._wp |
---|
| 423 | sm_i (:,:,:) = 0._wp |
---|
| 424 | o_i (:,:,:) = 0._wp |
---|
| 425 | |
---|
| 426 | e_i(:,:,:,:) = 0._wp |
---|
| 427 | e_s(:,:,:,:) = 0._wp |
---|
| 428 | |
---|
| 429 | DO jl = 1, jpl |
---|
| 430 | DO jk = 1, nlay_i |
---|
[5123] | 431 | t_i(:,:,jk,jl) = rt0 * tmask(:,:,1) |
---|
[4688] | 432 | END DO |
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| 433 | DO jk = 1, nlay_s |
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[5123] | 434 | t_s(:,:,jk,jl) = rt0 * tmask(:,:,1) |
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[4688] | 435 | END DO |
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| 436 | END DO |
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[6140] | 437 | |
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[5123] | 438 | ENDIF ! ln_iceini |
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[4688] | 439 | |
---|
| 440 | at_i (:,:) = 0.0_wp |
---|
| 441 | DO jl = 1, jpl |
---|
| 442 | at_i (:,:) = at_i (:,:) + a_i (:,:,jl) |
---|
| 443 | END DO |
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| 444 | ! |
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[825] | 445 | !-------------------------------------------------------------------- |
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[4161] | 446 | ! 4) Global ice variables for output diagnostics | |
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[825] | 447 | !-------------------------------------------------------------------- |
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[4161] | 448 | u_ice (:,:) = 0._wp |
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| 449 | v_ice (:,:) = 0._wp |
---|
| 450 | stress1_i(:,:) = 0._wp |
---|
| 451 | stress2_i(:,:) = 0._wp |
---|
| 452 | stress12_i(:,:) = 0._wp |
---|
[825] | 453 | |
---|
| 454 | !-------------------------------------------------------------------- |
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[4161] | 455 | ! 5) Moments for advection |
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[825] | 456 | !-------------------------------------------------------------------- |
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| 457 | |
---|
[4161] | 458 | sxopw (:,:) = 0._wp |
---|
| 459 | syopw (:,:) = 0._wp |
---|
| 460 | sxxopw(:,:) = 0._wp |
---|
| 461 | syyopw(:,:) = 0._wp |
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| 462 | sxyopw(:,:) = 0._wp |
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[3610] | 463 | |
---|
[4161] | 464 | sxice (:,:,:) = 0._wp ; sxsn (:,:,:) = 0._wp ; sxa (:,:,:) = 0._wp |
---|
| 465 | syice (:,:,:) = 0._wp ; sysn (:,:,:) = 0._wp ; sya (:,:,:) = 0._wp |
---|
| 466 | sxxice(:,:,:) = 0._wp ; sxxsn(:,:,:) = 0._wp ; sxxa (:,:,:) = 0._wp |
---|
| 467 | syyice(:,:,:) = 0._wp ; syysn(:,:,:) = 0._wp ; syya (:,:,:) = 0._wp |
---|
| 468 | sxyice(:,:,:) = 0._wp ; sxysn(:,:,:) = 0._wp ; sxya (:,:,:) = 0._wp |
---|
[825] | 469 | |
---|
[4161] | 470 | sxc0 (:,:,:) = 0._wp ; sxe (:,:,:,:)= 0._wp |
---|
| 471 | syc0 (:,:,:) = 0._wp ; sye (:,:,:,:)= 0._wp |
---|
| 472 | sxxc0 (:,:,:) = 0._wp ; sxxe (:,:,:,:)= 0._wp |
---|
| 473 | syyc0 (:,:,:) = 0._wp ; syye (:,:,:,:)= 0._wp |
---|
| 474 | sxyc0 (:,:,:) = 0._wp ; sxye (:,:,:,:)= 0._wp |
---|
[825] | 475 | |
---|
[4161] | 476 | sxsal (:,:,:) = 0._wp |
---|
| 477 | sysal (:,:,:) = 0._wp |
---|
| 478 | sxxsal (:,:,:) = 0._wp |
---|
| 479 | syysal (:,:,:) = 0._wp |
---|
| 480 | sxysal (:,:,:) = 0._wp |
---|
[825] | 481 | |
---|
[4335] | 482 | sxage (:,:,:) = 0._wp |
---|
| 483 | syage (:,:,:) = 0._wp |
---|
| 484 | sxxage (:,:,:) = 0._wp |
---|
| 485 | syyage (:,:,:) = 0._wp |
---|
| 486 | sxyage (:,:,:) = 0._wp |
---|
| 487 | |
---|
[825] | 488 | |
---|
[6140] | 489 | CALL wrk_dealloc( jpi, jpj, jpl, zh_i_ini, za_i_ini, zv_i_ini ) |
---|
| 490 | CALL wrk_dealloc( jpi, jpj, zht_i_ini, zat_i_ini, zvt_i_ini, zts_u_ini, zht_s_ini, zsm_i_ini, ztm_i_ini ) |
---|
| 491 | CALL wrk_dealloc( jpi, jpj, zswitch ) |
---|
[4161] | 492 | |
---|
[825] | 493 | END SUBROUTINE lim_istate |
---|
| 494 | |
---|
| 495 | SUBROUTINE lim_istate_init |
---|
| 496 | !!------------------------------------------------------------------- |
---|
| 497 | !! *** ROUTINE lim_istate_init *** |
---|
| 498 | !! |
---|
| 499 | !! ** Purpose : Definition of initial state of the ice |
---|
| 500 | !! |
---|
[4161] | 501 | !! ** Method : Read the namiceini namelist and check the parameter |
---|
| 502 | !! values called at the first timestep (nit000) |
---|
[825] | 503 | !! |
---|
[4161] | 504 | !! ** input : |
---|
| 505 | !! Namelist namiceini |
---|
| 506 | !! |
---|
| 507 | !! history : |
---|
| 508 | !! 8.5 ! 03-08 (C. Ethe) original code |
---|
| 509 | !! 8.5 ! 07-11 (M. Vancoppenolle) rewritten initialization |
---|
[825] | 510 | !!----------------------------------------------------------------------------- |
---|
[6140] | 511 | ! |
---|
| 512 | INTEGER :: ios,ierr,inum_ice ! Local integer output status for namelist read |
---|
| 513 | INTEGER :: ji,jj |
---|
| 514 | INTEGER :: ifpr, ierror |
---|
| 515 | ! |
---|
| 516 | CHARACTER(len=100) :: cn_dir ! Root directory for location of ice files |
---|
| 517 | TYPE(FLD_N) :: sn_hti, sn_hts, sn_ati, sn_tsu, sn_tmi, sn_smi |
---|
| 518 | TYPE(FLD_N), DIMENSION(jpfldi) :: slf_i ! array of namelist informations on the fields to read |
---|
| 519 | ! |
---|
| 520 | NAMELIST/namiceini/ ln_iceini, ln_iceini_file, rn_thres_sst, rn_hts_ini_n, rn_hts_ini_s, & |
---|
| 521 | & rn_hti_ini_n, rn_hti_ini_s, rn_ati_ini_n, rn_ati_ini_s, rn_smi_ini_n, & |
---|
| 522 | & rn_smi_ini_s, rn_tmi_ini_n, rn_tmi_ini_s, & |
---|
| 523 | & sn_hti, sn_hts, sn_ati, sn_tsu, sn_tmi, sn_smi, cn_dir |
---|
[825] | 524 | !!----------------------------------------------------------------------------- |
---|
[2528] | 525 | ! |
---|
[4147] | 526 | REWIND( numnam_ice_ref ) ! Namelist namiceini in reference namelist : Ice initial state |
---|
| 527 | READ ( numnam_ice_ref, namiceini, IOSTAT = ios, ERR = 901) |
---|
| 528 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namiceini in reference namelist', lwp ) |
---|
| 529 | |
---|
| 530 | REWIND( numnam_ice_cfg ) ! Namelist namiceini in configuration namelist : Ice initial state |
---|
| 531 | READ ( numnam_ice_cfg, namiceini, IOSTAT = ios, ERR = 902 ) |
---|
| 532 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namiceini in configuration namelist', lwp ) |
---|
[4624] | 533 | IF(lwm) WRITE ( numoni, namiceini ) |
---|
[4161] | 534 | |
---|
[6140] | 535 | slf_i(jp_hti) = sn_hti ; slf_i(jp_hts) = sn_hts |
---|
| 536 | slf_i(jp_ati) = sn_ati ; slf_i(jp_tsu) = sn_tsu |
---|
| 537 | slf_i(jp_tmi) = sn_tmi ; slf_i(jp_smi) = sn_smi |
---|
| 538 | |
---|
[4161] | 539 | ! Define the initial parameters |
---|
| 540 | ! ------------------------- |
---|
| 541 | |
---|
| 542 | IF(lwp) THEN |
---|
[825] | 543 | WRITE(numout,*) |
---|
| 544 | WRITE(numout,*) 'lim_istate_init : ice parameters inititialisation ' |
---|
| 545 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
---|
[5123] | 546 | WRITE(numout,*) ' initialization with ice (T) or not (F) ln_iceini = ', ln_iceini |
---|
[6140] | 547 | WRITE(numout,*) ' ice initialization from a netcdf file ln_iceini_file = ', ln_iceini_file |
---|
[5123] | 548 | WRITE(numout,*) ' threshold water temp. for initial sea-ice rn_thres_sst = ', rn_thres_sst |
---|
| 549 | WRITE(numout,*) ' initial snow thickness in the north rn_hts_ini_n = ', rn_hts_ini_n |
---|
| 550 | WRITE(numout,*) ' initial snow thickness in the south rn_hts_ini_s = ', rn_hts_ini_s |
---|
| 551 | WRITE(numout,*) ' initial ice thickness in the north rn_hti_ini_n = ', rn_hti_ini_n |
---|
| 552 | WRITE(numout,*) ' initial ice thickness in the south rn_hti_ini_s = ', rn_hti_ini_s |
---|
| 553 | WRITE(numout,*) ' initial ice concentr. in the north rn_ati_ini_n = ', rn_ati_ini_n |
---|
| 554 | WRITE(numout,*) ' initial ice concentr. in the north rn_ati_ini_s = ', rn_ati_ini_s |
---|
| 555 | WRITE(numout,*) ' initial ice salinity in the north rn_smi_ini_n = ', rn_smi_ini_n |
---|
| 556 | WRITE(numout,*) ' initial ice salinity in the south rn_smi_ini_s = ', rn_smi_ini_s |
---|
| 557 | WRITE(numout,*) ' initial ice/snw temp in the north rn_tmi_ini_n = ', rn_tmi_ini_n |
---|
| 558 | WRITE(numout,*) ' initial ice/snw temp in the south rn_tmi_ini_s = ', rn_tmi_ini_s |
---|
[825] | 559 | ENDIF |
---|
[4161] | 560 | |
---|
[6140] | 561 | IF( ln_iceini_file ) THEN ! Ice initialization using input file |
---|
| 562 | ! |
---|
| 563 | ! set si structure |
---|
| 564 | ALLOCATE( si(jpfldi), STAT=ierror ) |
---|
| 565 | IF( ierror > 0 ) THEN |
---|
| 566 | CALL ctl_stop( 'Ice_ini in limistate: unable to allocate si structure' ) ; RETURN |
---|
| 567 | ENDIF |
---|
| 568 | |
---|
| 569 | DO ifpr = 1, jpfldi |
---|
| 570 | ALLOCATE( si(ifpr)%fnow(jpi,jpj,1) ) |
---|
| 571 | ALLOCATE( si(ifpr)%fdta(jpi,jpj,1,2) ) |
---|
| 572 | END DO |
---|
| 573 | |
---|
| 574 | ! fill si with slf_i and control print |
---|
| 575 | CALL fld_fill( si, slf_i, cn_dir, 'lim_istate', 'lim istate ini', 'numnam_ice' ) |
---|
| 576 | |
---|
| 577 | CALL fld_read( nit000, 1, si ) ! input fields provided at the current time-step |
---|
| 578 | |
---|
| 579 | ENDIF |
---|
| 580 | |
---|
[825] | 581 | END SUBROUTINE lim_istate_init |
---|
| 582 | |
---|
| 583 | #else |
---|
| 584 | !!---------------------------------------------------------------------- |
---|
| 585 | !! Default option : Empty module NO LIM sea-ice model |
---|
| 586 | !!---------------------------------------------------------------------- |
---|
| 587 | CONTAINS |
---|
| 588 | SUBROUTINE lim_istate ! Empty routine |
---|
| 589 | END SUBROUTINE lim_istate |
---|
| 590 | #endif |
---|
| 591 | |
---|
| 592 | !!====================================================================== |
---|
| 593 | END MODULE limistate |
---|