| 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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| 6 | !! History : 2.0 ! 2004-01 (C. Ethe, G. Madec) Original code |
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| 7 | !! 3.0 ! 2011-02 (G. Madec) dynamical allocation |
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| 8 | !! - ! 2014 (C. Rousset) add N/S initializations |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | #if defined key_lim3 |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! 'key_lim3' : LIM3 sea-ice model |
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| 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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| 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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| 21 | USE sbc_ice ! Surface boundary condition: ice fields |
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| 22 | USE eosbn2 ! equation of state |
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| 23 | USE ice ! sea-ice variables |
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| 24 | USE par_oce ! ocean parameters |
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| 25 | USE dom_ice ! sea-ice domain |
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| 26 | USE limvar ! lim_var_salprof |
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| 27 | ! |
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| 28 | USE in_out_manager ! I/O manager |
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| 29 | USE lib_mpp ! MPP library |
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| 30 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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| 31 | USE wrk_nemo ! work arrays |
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| 32 | USE fldread ! read input fields |
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| 33 | USE iom |
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| 34 | |
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| 35 | IMPLICIT NONE |
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| 36 | PRIVATE |
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| 37 | |
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| 38 | PUBLIC lim_istate ! routine called by lim_init.F90 |
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| 39 | |
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| 40 | ! !!** init namelist (namiceini) ** |
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| 41 | REAL(wp) :: rn_thres_sst ! threshold water temperature for initial sea ice |
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| 42 | REAL(wp) :: rn_hts_ini_n ! initial snow thickness in the north |
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| 43 | REAL(wp) :: rn_hts_ini_s ! initial snow thickness in the south |
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| 44 | REAL(wp) :: rn_hti_ini_n ! initial ice thickness in the north |
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| 45 | REAL(wp) :: rn_hti_ini_s ! initial ice thickness in the south |
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| 46 | REAL(wp) :: rn_ati_ini_n ! initial leads area in the north |
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| 47 | REAL(wp) :: rn_ati_ini_s ! initial leads area in the south |
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| 48 | REAL(wp) :: rn_smi_ini_n ! initial salinity |
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| 49 | REAL(wp) :: rn_smi_ini_s ! initial salinity |
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| 50 | REAL(wp) :: rn_tmi_ini_n ! initial temperature |
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| 51 | REAL(wp) :: rn_tmi_ini_s ! initial temperature |
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| 52 | |
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| 53 | INTEGER , PARAMETER :: jpfldi = 6 ! maximum number of files to read |
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| 54 | INTEGER , PARAMETER :: jp_hti = 1 ! index of ice thickness (m) at T-point |
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| 55 | INTEGER , PARAMETER :: jp_hts = 2 ! index of snow thicknes (m) at T-point |
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| 56 | INTEGER , PARAMETER :: jp_ati = 3 ! index of ice fraction (%) at T-point |
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| 57 | INTEGER , PARAMETER :: jp_tsu = 4 ! index of ice surface temp (K) at T-point |
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| 58 | INTEGER , PARAMETER :: jp_tmi = 5 ! index of ice temp at T-point |
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| 59 | INTEGER , PARAMETER :: jp_smi = 6 ! index of ice sali at T-point |
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| 60 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: si ! structure of input fields (file informations, fields read) |
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| 61 | |
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| 62 | LOGICAL :: ln_iceini ! initialization or not |
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| 63 | LOGICAL :: ln_iceini_file ! Ice initialization state from 2D netcdf file |
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| 64 | !!---------------------------------------------------------------------- |
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| 65 | !! LIM 3.0, UCL-LOCEAN-IPSL (2008) |
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| 66 | !! $Id$ |
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| 67 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 68 | !!---------------------------------------------------------------------- |
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| 69 | CONTAINS |
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| 70 | |
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| 71 | SUBROUTINE lim_istate |
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| 72 | !!------------------------------------------------------------------- |
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| 73 | !! *** ROUTINE lim_istate *** |
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| 74 | !! |
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| 75 | !! ** Purpose : defined the sea-ice initial state |
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| 76 | !! |
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| 77 | !! ** Method : 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 : 1) Read namelist |
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| 83 | !! 2) Basal temperature; ice and hemisphere masks |
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| 84 | !! 3) Fill in the ice thickness distribution using gaussian |
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| 85 | !! 4) Fill in space-dependent arrays for state variables |
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| 86 | !! 5) Diagnostic arrays |
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| 87 | !! 6) Lateral boundary conditions |
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| 88 | !! |
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| 89 | !! ** Notes : o_i, t_su, t_s, t_i, s_i must be filled everywhere, even |
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| 90 | !! where there is no ice (clem: I do not know why, is it mandatory?) |
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| 91 | !! |
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| 92 | !! History : |
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| 93 | !! 2.0 ! 01-04 (C. Ethe, G. Madec) Original code |
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| 94 | !! 3.0 ! 2007 (M. Vancoppenolle) Rewrite for ice cats |
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| 95 | !! 4.0 ! 09-11 (M. Vancoppenolle) Enhanced version for ice cats |
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| 96 | !!-------------------------------------------------------------------- |
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| 97 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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| 98 | REAL(wp) :: ztmelts, zdh |
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| 99 | INTEGER :: i_hemis, i_fill, jl0 |
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| 100 | REAL(wp) :: ztest_1, ztest_2, ztest_3, ztest_4, ztests, zsigma, zarg, zA, zV, zA_cons, zV_cons, zconv |
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| 101 | REAL(wp), POINTER, DIMENSION(:,:) :: zswitch ! ice indicator |
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| 102 | REAL(wp), POINTER, DIMENSION(:,:) :: zht_i_ini, zat_i_ini, zvt_i_ini !data from namelist or nc file |
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| 103 | 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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| 104 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zh_i_ini, za_i_ini, zv_i_ini !data by cattegories to fill |
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| 105 | !-------------------------------------------------------------------- |
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| 106 | |
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| 107 | CALL wrk_alloc( jpi,jpj,jpl, zh_i_ini, za_i_ini, zv_i_ini ) |
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| 108 | 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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| 109 | CALL wrk_alloc( jpi,jpj, zswitch ) |
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| 110 | |
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| 111 | IF(lwp) WRITE(numout,*) |
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| 112 | IF(lwp) WRITE(numout,*) 'lim_istate: sea-ice initialization ' |
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| 113 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~ ' |
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| 114 | |
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| 115 | !-------------------------------------------------------------------- |
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| 116 | ! 1) Read namelist |
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| 117 | !-------------------------------------------------------------------- |
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| 118 | ! |
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| 119 | CALL lim_istate_init ! reading the initials parameters of the ice |
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| 120 | |
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| 121 | ! surface temperature |
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| 122 | DO jl = 1, jpl ! loop over categories |
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| 123 | t_su (:,:,jl) = rt0 * tmask(:,:,1) |
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| 124 | tn_ice(:,:,jl) = rt0 * tmask(:,:,1) |
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| 125 | END DO |
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| 126 | |
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| 127 | ! basal temperature (considered at freezing point) |
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| 128 | CALL eos_fzp( sss_m(:,:), t_bo(:,:) ) |
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| 129 | t_bo(:,:) = ( t_bo(:,:) + rt0 ) * tmask(:,:,1) |
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| 130 | |
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| 131 | |
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| 132 | IF( ln_iceini ) THEN |
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| 133 | ! |
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| 134 | !-------------------------------------------------------------------- |
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| 135 | ! 2) Basal temperature, ice mask and hemispheric index |
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| 136 | !-------------------------------------------------------------------- |
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| 137 | ! |
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| 138 | DO jj = 1, jpj ! ice if sst <= t-freez + ttest |
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| 139 | DO ji = 1, jpi |
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| 140 | IF( ( sst_m(ji,jj) - ( t_bo(ji,jj) - rt0 ) ) * tmask(ji,jj,1) >= rn_thres_sst ) THEN |
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| 141 | zswitch(ji,jj) = 0._wp * tmask(ji,jj,1) ! no ice |
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| 142 | ELSE |
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| 143 | zswitch(ji,jj) = 1._wp * tmask(ji,jj,1) ! ice |
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| 144 | ENDIF |
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| 145 | END DO |
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| 146 | END DO |
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| 147 | |
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| 148 | !-------------------------------------------------------------------- |
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| 149 | ! 3) Initialization of sea ice state variables |
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| 150 | !-------------------------------------------------------------------- |
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| 151 | IF( ln_iceini_file )THEN |
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| 152 | ! |
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| 153 | zht_i_ini(:,:) = si(jp_hti)%fnow(:,:,1) |
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| 154 | zht_s_ini(:,:) = si(jp_hts)%fnow(:,:,1) |
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| 155 | zat_i_ini(:,:) = si(jp_ati)%fnow(:,:,1) |
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| 156 | zts_u_ini(:,:) = si(jp_tsu)%fnow(:,:,1) |
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| 157 | ztm_i_ini(:,:) = si(jp_tmi)%fnow(:,:,1) |
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| 158 | zsm_i_ini(:,:) = si(jp_smi)%fnow(:,:,1) |
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| 159 | ! |
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| 160 | ELSE ! ln_iceini_file = F |
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| 161 | ! |
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| 162 | !----------------------------- |
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| 163 | ! 3.1) Hemisphere-dependent arrays |
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| 164 | !----------------------------- |
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| 165 | ! assign initial thickness, concentration, snow depth and salinity to an hemisphere-dependent array |
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| 166 | DO jj = 1, jpj |
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| 167 | DO ji = 1, jpi |
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| 168 | IF( fcor(ji,jj) >= 0._wp ) THEN |
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| 169 | zht_i_ini(ji,jj) = rn_hti_ini_n |
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| 170 | zht_s_ini(ji,jj) = rn_hts_ini_n |
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| 171 | zat_i_ini(ji,jj) = rn_ati_ini_n |
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| 172 | zts_u_ini(ji,jj) = rn_tmi_ini_n |
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| 173 | zsm_i_ini(ji,jj) = rn_smi_ini_n |
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| 174 | ztm_i_ini(ji,jj) = rn_tmi_ini_n |
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| 175 | ELSE |
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| 176 | zht_i_ini(ji,jj) = rn_hti_ini_s |
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| 177 | zht_s_ini(ji,jj) = rn_hts_ini_s |
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| 178 | zat_i_ini(ji,jj) = rn_ati_ini_s |
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| 179 | zts_u_ini(ji,jj) = rn_tmi_ini_s |
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| 180 | zsm_i_ini(ji,jj) = rn_smi_ini_s |
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| 181 | ztm_i_ini(ji,jj) = rn_tmi_ini_s |
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| 182 | ENDIF |
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| 183 | END DO |
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| 184 | END DO |
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| 185 | ! |
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| 186 | ENDIF ! ln_iceini_file |
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| 187 | |
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| 188 | zvt_i_ini(:,:) = zht_i_ini(:,:) * zat_i_ini(:,:) ! ice volume |
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| 189 | |
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| 190 | !--------------------------------------------------------------------- |
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| 191 | ! 3.2) Distribute ice concentration and thickness into the categories |
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| 192 | !--------------------------------------------------------------------- |
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| 193 | ! a gaussian distribution for ice concentration is used |
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| 194 | ! then we check whether the distribution fullfills |
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| 195 | ! volume and area conservation, positivity and ice categories bounds |
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| 196 | zh_i_ini(:,:,:) = 0._wp |
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| 197 | za_i_ini(:,:,:) = 0._wp |
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| 198 | zv_i_ini(:,:,:) = 0._wp |
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| 199 | ! |
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| 200 | DO jj = 1, jpj |
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| 201 | DO ji = 1, jpi |
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| 202 | ! |
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| 203 | IF( zat_i_ini(ji,jj) > 0._wp .AND. zht_i_ini(ji,jj) > 0._wp )THEN |
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| 204 | ! |
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| 205 | ztest_1 = 0 ; ztest_2 = 0 ; ztest_3 = 0 ; ztest_4 = 0 |
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| 206 | ! ztests = 0 |
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| 207 | ! |
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| 208 | DO i_fill = jpl, 1, -1 |
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| 209 | ! |
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| 210 | ! IF( ztests /= 4 ) THEN |
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| 211 | IF ( ( ztest_1 + ztest_2 + ztest_3 + ztest_4 ) /= 4 ) THEN |
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| 212 | !---------------------------- |
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| 213 | ! fill the i_fill categories |
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| 214 | !---------------------------- |
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| 215 | ! *** 1 category to fill |
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| 216 | IF ( i_fill .EQ. 1 ) THEN |
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| 217 | zh_i_ini(ji,jj, 1) = zht_i_ini(ji,jj) |
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| 218 | za_i_ini(ji,jj, 1) = zat_i_ini(ji,jj) |
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| 219 | zh_i_ini(ji,jj,2:jpl) = 0._wp |
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| 220 | za_i_ini(ji,jj,2:jpl) = 0._wp |
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| 221 | ELSE |
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| 222 | ! |
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| 223 | ! *** >1 categores to fill |
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| 224 | !--- Ice thicknesses in the i_fill - 1 first categories |
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| 225 | DO jl = 1, i_fill - 1 |
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| 226 | zh_i_ini(ji,jj,jl) = hi_mean(jl) |
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| 227 | END DO |
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| 228 | ! |
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| 229 | !--- jl0: most likely index where cc will be maximum |
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| 230 | DO jl = 1, jpl |
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| 231 | IF ( ( zht_i_ini(ji,jj) > hi_max(jl-1) ) .AND. & |
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| 232 | & ( zht_i_ini(ji,jj) <= hi_max(jl) ) ) THEN |
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| 233 | jl0 = jl |
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| 234 | ENDIF |
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| 235 | END DO |
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| 236 | jl0 = MIN(jl0, i_fill) |
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| 237 | ! |
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| 238 | !--- Concentrations |
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| 239 | za_i_ini(ji,jj,jl0) = zat_i_ini(ji,jj) / SQRT(REAL(jpl)) |
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| 240 | DO jl = 1, i_fill - 1 |
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| 241 | IF( jl /= jl0 )THEN |
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| 242 | zsigma = 0.5 * zht_i_ini(ji,jj) |
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| 243 | zarg = ( zh_i_ini(ji,jj,jl) - zht_i_ini(ji,jj) ) / zsigma |
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| 244 | za_i_ini(ji,jj,jl) = za_i_ini(ji,jj,jl0) * EXP(-zarg**2) |
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| 245 | ENDIF |
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| 246 | END DO |
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| 247 | ! |
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| 248 | zA = 0. ! sum of the areas in the jpl categories |
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| 249 | DO jl = 1, i_fill - 1 |
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| 250 | zA = zA + za_i_ini(ji,jj,jl) |
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| 251 | END DO |
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| 252 | za_i_ini(ji,jj,i_fill) = zat_i_ini(ji,jj) - zA ! ice conc in the last category |
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| 253 | IF ( i_fill < jpl ) za_i_ini(ji,jj,i_fill+1:jpl) = 0._wp |
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| 254 | ! |
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| 255 | !--- Ice thickness in the last category |
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| 256 | zV = 0. ! sum of the volumes of the N-1 categories |
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| 257 | DO jl = 1, i_fill - 1 |
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| 258 | zV = zV + za_i_ini(ji,jj,jl)*zh_i_ini(ji,jj,jl) |
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| 259 | END DO |
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| 260 | zh_i_ini(ji,jj,i_fill) = ( zvt_i_ini(ji,jj) - zV ) / za_i_ini(ji,jj,i_fill) |
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| 261 | IF ( i_fill < jpl ) zh_i_ini(ji,jj,i_fill+1:jpl) = 0._wp |
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| 262 | ! |
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| 263 | !--- volumes |
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| 264 | zv_i_ini(ji,jj,:) = za_i_ini(ji,jj,:) * zh_i_ini(ji,jj,:) |
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| 265 | IF ( i_fill < jpl ) zv_i_ini(ji,jj,i_fill+1:jpl) = 0._wp |
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| 266 | ! |
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| 267 | ENDIF ! i_fill |
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| 268 | ! |
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| 269 | !--------------------- |
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| 270 | ! Compatibility tests |
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| 271 | !--------------------- |
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| 272 | ! Test 1: area conservation |
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| 273 | zA_cons = SUM(za_i_ini(ji,jj,:)) ; zconv = ABS(zat_i_ini(ji,jj) - zA_cons ) |
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| 274 | IF( zconv < 1.0e-6 ) THEN ; ztest_1 = 1. |
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| 275 | ELSE ; ztest_1 = 0. |
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| 276 | ENDIF |
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| 277 | ! |
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| 278 | ! Test 2: volume conservation |
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| 279 | zV_cons = SUM(zv_i_ini(ji,jj,:)) |
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| 280 | zconv = ABS(zvt_i_ini(ji,jj) - zV_cons) |
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| 281 | IF( zconv < 1.0e-6 ) THEN ; ztest_2 = 1. |
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| 282 | ELSE ; ztest_2 = 0. |
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| 283 | ENDIF |
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| 284 | ! |
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| 285 | ! Test 3: thickness of the last category is in-bounds ? |
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| 286 | IF( zh_i_ini(ji,jj,i_fill) > hi_max(i_fill-1) ) THEN ; ztest_3 = 1. |
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| 287 | ELSE ; ztest_3 = 0. |
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| 288 | ENDIF |
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| 289 | ! |
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| 290 | ! Test 4: positivity of ice concentrations |
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| 291 | ztest_4 = 1 |
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| 292 | DO jl = 1, jpl |
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| 293 | IF( za_i_ini(ji,jj,jl) < 0._wp ) ztest_4 = 0 |
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| 294 | END DO |
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| 295 | ! |
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| 296 | ENDIF ! ztest_1 + ztest_2 + ztest_3 + ztest_4 |
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| 297 | ! |
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| 298 | ztests = ztest_1 + ztest_2 + ztest_3 + ztest_4 |
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| 299 | ! |
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| 300 | END DO ! i_fill |
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| 301 | ! |
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| 302 | IF(lwp) THEN |
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| 303 | IF( ztests /= 4 ) THEN |
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| 304 | WRITE(numout,*) |
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| 305 | WRITE(numout,*) ' !!!! ALERT !!! ' |
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| 306 | WRITE(numout,*) ' !!!! Something is wrong in the LIM3 initialization procedure ' |
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| 307 | WRITE(numout,*) |
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| 308 | WRITE(numout,*) ' *** ztests is not equal to 4 : ztests : ', ztests |
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| 309 | WRITE(numout,*) ' *** ztest_i (i=1,4) = ', ztest_1, ztest_2, ztest_3, ztest_4 |
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| 310 | WRITE(numout,*) ' zat_i_ini : ', zat_i_ini(ji,jj) |
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| 311 | WRITE(numout,*) ' zht_i_ini : ', zht_i_ini(ji,jj) |
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| 312 | ENDIF ! ztests /= 4 |
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| 313 | ENDIF |
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| 314 | ! |
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| 315 | ENDIF ! zat_i_ini(ji,jj) > 0._wp .AND. zhm_i_ini(ji,jj) > 0._wp |
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| 316 | ! |
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| 317 | END DO |
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| 318 | END DO |
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| 319 | |
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| 320 | !--------------------------------------------------------------------- |
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| 321 | ! 3.3) Space-dependent arrays for ice state variables |
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| 322 | !--------------------------------------------------------------------- |
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| 323 | |
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| 324 | ! Ice concentration, thickness and volume, ice salinity, ice age, surface temperature |
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| 325 | DO jl = 1, jpl ! loop over categories |
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| 326 | DO jj = 1, jpj |
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| 327 | DO ji = 1, jpi |
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| 328 | a_i(ji,jj,jl) = zswitch(ji,jj) * za_i_ini(ji,jj,jl) ! concentration |
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| 329 | ht_i(ji,jj,jl) = zswitch(ji,jj) * zh_i_ini(ji,jj,jl) ! ice thickness |
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| 330 | sm_i(ji,jj,jl) = zswitch(ji,jj) * zsm_i_ini(ji,jj) ! salinity |
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| 331 | o_i(ji,jj,jl) = zswitch(ji,jj) * 1._wp ! age (1 day) |
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| 332 | 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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| 333 | |
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| 334 | IF( zht_i_ini(ji,jj) > 0._wp )THEN |
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| 335 | 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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| 336 | ELSE |
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| 337 | ht_s(ji,jj,jl)= 0._wp |
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| 338 | ENDIF |
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| 339 | |
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| 340 | ! This case below should not be used if (ht_s/ht_i) is ok in namelist |
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| 341 | ! In case snow load is in excess that would lead to transformation from snow to ice |
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| 342 | ! Then, transfer the snow excess into the ice (different from limthd_dh) |
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| 343 | zdh = MAX( 0._wp, ( rhosn * ht_s(ji,jj,jl) + ( rhoic - rau0 ) * ht_i(ji,jj,jl) ) * r1_rau0 ) |
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| 344 | ! recompute ht_i, ht_s avoiding out of bounds values |
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| 345 | ht_i(ji,jj,jl) = MIN( hi_max(jl), ht_i(ji,jj,jl) + zdh ) |
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| 346 | ht_s(ji,jj,jl) = MAX( 0._wp, ht_s(ji,jj,jl) - zdh * rhoic * r1_rhosn ) |
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| 347 | |
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| 348 | ! ice volume, salt content, age content |
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| 349 | v_i(ji,jj,jl) = ht_i(ji,jj,jl) * a_i(ji,jj,jl) ! ice volume |
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| 350 | v_s(ji,jj,jl) = ht_s(ji,jj,jl) * a_i(ji,jj,jl) ! snow volume |
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| 351 | 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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| 352 | oa_i(ji,jj,jl) = o_i(ji,jj,jl) * a_i(ji,jj,jl) ! age content |
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| 353 | END DO |
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| 354 | END DO |
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| 355 | END DO |
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| 356 | |
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| 357 | ! for constant salinity in time |
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| 358 | IF( nn_icesal == 1 .OR. nn_icesal == 3 ) THEN |
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| 359 | CALL lim_var_salprof |
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| 360 | smv_i = sm_i * v_i |
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| 361 | ENDIF |
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| 362 | |
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| 363 | ! Snow temperature and heat content |
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| 364 | DO jk = 1, nlay_s |
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| 365 | DO jl = 1, jpl ! loop over categories |
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| 366 | DO jj = 1, jpj |
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| 367 | DO ji = 1, jpi |
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| 368 | t_s(ji,jj,jk,jl) = zswitch(ji,jj) * ztm_i_ini(ji,jj) + ( 1._wp - zswitch(ji,jj) ) * rt0 |
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| 369 | ! Snow energy of melting |
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| 370 | e_s(ji,jj,jk,jl) = zswitch(ji,jj) * rhosn * ( cpic * ( rt0 - t_s(ji,jj,jk,jl) ) + lfus ) |
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| 371 | |
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| 372 | ! Mutliply by volume, and divide by number of layers to get heat content in J/m2 |
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| 373 | e_s(ji,jj,jk,jl) = e_s(ji,jj,jk,jl) * v_s(ji,jj,jl) * r1_nlay_s |
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| 374 | END DO |
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| 375 | END DO |
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| 376 | END DO |
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| 377 | END DO |
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| 378 | |
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| 379 | ! Ice salinity, temperature and heat content |
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| 380 | DO jk = 1, nlay_i |
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| 381 | DO jl = 1, jpl ! loop over categories |
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| 382 | DO jj = 1, jpj |
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| 383 | DO ji = 1, jpi |
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| 384 | t_i(ji,jj,jk,jl) = zswitch(ji,jj) * ztm_i_ini(ji,jj) + ( 1._wp - zswitch(ji,jj) ) * rt0 |
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| 385 | 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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| 386 | ztmelts = - tmut * s_i(ji,jj,jk,jl) + rt0 !Melting temperature in K |
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| 387 | |
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| 388 | ! heat content per unit volume |
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| 389 | e_i(ji,jj,jk,jl) = zswitch(ji,jj) * rhoic * ( cpic * ( ztmelts - t_i(ji,jj,jk,jl) ) & |
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| 390 | + lfus * ( 1._wp - (ztmelts-rt0) / MIN((t_i(ji,jj,jk,jl)-rt0),-epsi20) ) & |
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| 391 | - rcp * ( ztmelts - rt0 ) ) |
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| 392 | |
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| 393 | ! Mutliply by ice volume, and divide by number of layers to get heat content in J/m2 |
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| 394 | e_i(ji,jj,jk,jl) = e_i(ji,jj,jk,jl) * v_i(ji,jj,jl) * r1_nlay_i |
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| 395 | END DO |
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| 396 | END DO |
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| 397 | END DO |
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| 398 | END DO |
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| 399 | |
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| 400 | tn_ice (:,:,:) = t_su (:,:,:) |
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| 401 | |
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| 402 | ELSE ! if ln_iceini=false |
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| 403 | a_i (:,:,:) = 0._wp |
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| 404 | v_i (:,:,:) = 0._wp |
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| 405 | v_s (:,:,:) = 0._wp |
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| 406 | smv_i(:,:,:) = 0._wp |
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| 407 | oa_i (:,:,:) = 0._wp |
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| 408 | ht_i (:,:,:) = 0._wp |
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| 409 | ht_s (:,:,:) = 0._wp |
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| 410 | sm_i (:,:,:) = 0._wp |
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| 411 | o_i (:,:,:) = 0._wp |
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| 412 | |
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| 413 | e_i(:,:,:,:) = 0._wp |
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| 414 | e_s(:,:,:,:) = 0._wp |
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| 415 | |
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| 416 | DO jl = 1, jpl |
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| 417 | DO jk = 1, nlay_i |
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| 418 | t_i(:,:,jk,jl) = rt0 * tmask(:,:,1) |
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| 419 | END DO |
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| 420 | DO jk = 1, nlay_s |
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| 421 | t_s(:,:,jk,jl) = rt0 * tmask(:,:,1) |
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| 422 | END DO |
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| 423 | END DO |
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| 424 | |
|---|
| 425 | ENDIF ! ln_iceini |
|---|
| 426 | |
|---|
| 427 | at_i (:,:) = 0.0_wp |
|---|
| 428 | DO jl = 1, jpl |
|---|
| 429 | at_i (:,:) = at_i (:,:) + a_i (:,:,jl) |
|---|
| 430 | END DO |
|---|
| 431 | ! |
|---|
| 432 | !-------------------------------------------------------------------- |
|---|
| 433 | ! 4) Global ice variables for output diagnostics | |
|---|
| 434 | !-------------------------------------------------------------------- |
|---|
| 435 | u_ice (:,:) = 0._wp |
|---|
| 436 | v_ice (:,:) = 0._wp |
|---|
| 437 | stress1_i(:,:) = 0._wp |
|---|
| 438 | stress2_i(:,:) = 0._wp |
|---|
| 439 | stress12_i(:,:) = 0._wp |
|---|
| 440 | |
|---|
| 441 | !-------------------------------------------------------------------- |
|---|
| 442 | ! 5) Moments for advection |
|---|
| 443 | !-------------------------------------------------------------------- |
|---|
| 444 | |
|---|
| 445 | sxopw (:,:) = 0._wp |
|---|
| 446 | syopw (:,:) = 0._wp |
|---|
| 447 | sxxopw(:,:) = 0._wp |
|---|
| 448 | syyopw(:,:) = 0._wp |
|---|
| 449 | sxyopw(:,:) = 0._wp |
|---|
| 450 | |
|---|
| 451 | sxice (:,:,:) = 0._wp ; sxsn (:,:,:) = 0._wp ; sxa (:,:,:) = 0._wp |
|---|
| 452 | syice (:,:,:) = 0._wp ; sysn (:,:,:) = 0._wp ; sya (:,:,:) = 0._wp |
|---|
| 453 | sxxice(:,:,:) = 0._wp ; sxxsn(:,:,:) = 0._wp ; sxxa (:,:,:) = 0._wp |
|---|
| 454 | syyice(:,:,:) = 0._wp ; syysn(:,:,:) = 0._wp ; syya (:,:,:) = 0._wp |
|---|
| 455 | sxyice(:,:,:) = 0._wp ; sxysn(:,:,:) = 0._wp ; sxya (:,:,:) = 0._wp |
|---|
| 456 | |
|---|
| 457 | sxc0 (:,:,:) = 0._wp ; sxe (:,:,:,:)= 0._wp |
|---|
| 458 | syc0 (:,:,:) = 0._wp ; sye (:,:,:,:)= 0._wp |
|---|
| 459 | sxxc0 (:,:,:) = 0._wp ; sxxe (:,:,:,:)= 0._wp |
|---|
| 460 | syyc0 (:,:,:) = 0._wp ; syye (:,:,:,:)= 0._wp |
|---|
| 461 | sxyc0 (:,:,:) = 0._wp ; sxye (:,:,:,:)= 0._wp |
|---|
| 462 | |
|---|
| 463 | sxsal (:,:,:) = 0._wp |
|---|
| 464 | sysal (:,:,:) = 0._wp |
|---|
| 465 | sxxsal (:,:,:) = 0._wp |
|---|
| 466 | syysal (:,:,:) = 0._wp |
|---|
| 467 | sxysal (:,:,:) = 0._wp |
|---|
| 468 | |
|---|
| 469 | sxage (:,:,:) = 0._wp |
|---|
| 470 | syage (:,:,:) = 0._wp |
|---|
| 471 | sxxage (:,:,:) = 0._wp |
|---|
| 472 | syyage (:,:,:) = 0._wp |
|---|
| 473 | sxyage (:,:,:) = 0._wp |
|---|
| 474 | |
|---|
| 475 | |
|---|
| 476 | CALL wrk_dealloc( jpi, jpj, jpl, zh_i_ini, za_i_ini, zv_i_ini ) |
|---|
| 477 | 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 ) |
|---|
| 478 | CALL wrk_dealloc( jpi, jpj, zswitch ) |
|---|
| 479 | |
|---|
| 480 | END SUBROUTINE lim_istate |
|---|
| 481 | |
|---|
| 482 | SUBROUTINE lim_istate_init |
|---|
| 483 | !!------------------------------------------------------------------- |
|---|
| 484 | !! *** ROUTINE lim_istate_init *** |
|---|
| 485 | !! |
|---|
| 486 | !! ** Purpose : Definition of initial state of the ice |
|---|
| 487 | !! |
|---|
| 488 | !! ** Method : Read the namiceini namelist and check the parameter |
|---|
| 489 | !! values called at the first timestep (nit000) |
|---|
| 490 | !! |
|---|
| 491 | !! ** input : |
|---|
| 492 | !! Namelist namiceini |
|---|
| 493 | !! |
|---|
| 494 | !! history : |
|---|
| 495 | !! 8.5 ! 03-08 (C. Ethe) original code |
|---|
| 496 | !! 8.5 ! 07-11 (M. Vancoppenolle) rewritten initialization |
|---|
| 497 | !!----------------------------------------------------------------------------- |
|---|
| 498 | ! |
|---|
| 499 | INTEGER :: ios,ierr,inum_ice ! Local integer output status for namelist read |
|---|
| 500 | INTEGER :: ji,jj |
|---|
| 501 | INTEGER :: ifpr, ierror |
|---|
| 502 | ! |
|---|
| 503 | CHARACTER(len=100) :: cn_dir ! Root directory for location of ice files |
|---|
| 504 | TYPE(FLD_N) :: sn_hti, sn_hts, sn_ati, sn_tsu, sn_tmi, sn_smi |
|---|
| 505 | TYPE(FLD_N), DIMENSION(jpfldi) :: slf_i ! array of namelist informations on the fields to read |
|---|
| 506 | ! |
|---|
| 507 | NAMELIST/namiceini/ ln_iceini, ln_iceini_file, rn_thres_sst, rn_hts_ini_n, rn_hts_ini_s, & |
|---|
| 508 | & rn_hti_ini_n, rn_hti_ini_s, rn_ati_ini_n, rn_ati_ini_s, rn_smi_ini_n, & |
|---|
| 509 | & rn_smi_ini_s, rn_tmi_ini_n, rn_tmi_ini_s, & |
|---|
| 510 | & sn_hti, sn_hts, sn_ati, sn_tsu, sn_tmi, sn_smi, cn_dir |
|---|
| 511 | !!----------------------------------------------------------------------------- |
|---|
| 512 | ! |
|---|
| 513 | REWIND( numnam_ice_ref ) ! Namelist namiceini in reference namelist : Ice initial state |
|---|
| 514 | READ ( numnam_ice_ref, namiceini, IOSTAT = ios, ERR = 901) |
|---|
| 515 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namiceini in reference namelist', lwp ) |
|---|
| 516 | |
|---|
| 517 | REWIND( numnam_ice_cfg ) ! Namelist namiceini in configuration namelist : Ice initial state |
|---|
| 518 | READ ( numnam_ice_cfg, namiceini, IOSTAT = ios, ERR = 902 ) |
|---|
| 519 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namiceini in configuration namelist', lwp ) |
|---|
| 520 | IF(lwm) WRITE ( numoni, namiceini ) |
|---|
| 521 | |
|---|
| 522 | slf_i(jp_hti) = sn_hti ; slf_i(jp_hts) = sn_hts |
|---|
| 523 | slf_i(jp_ati) = sn_ati ; slf_i(jp_tsu) = sn_tsu |
|---|
| 524 | slf_i(jp_tmi) = sn_tmi ; slf_i(jp_smi) = sn_smi |
|---|
| 525 | |
|---|
| 526 | ! Define the initial parameters |
|---|
| 527 | ! ------------------------- |
|---|
| 528 | |
|---|
| 529 | IF(lwp) THEN |
|---|
| 530 | WRITE(numout,*) |
|---|
| 531 | WRITE(numout,*) 'lim_istate_init : ice parameters inititialisation ' |
|---|
| 532 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
|---|
| 533 | WRITE(numout,*) ' initialization with ice (T) or not (F) ln_iceini = ', ln_iceini |
|---|
| 534 | WRITE(numout,*) ' ice initialization from a netcdf file ln_iceini_file = ', ln_iceini_file |
|---|
| 535 | WRITE(numout,*) ' threshold water temp. for initial sea-ice rn_thres_sst = ', rn_thres_sst |
|---|
| 536 | WRITE(numout,*) ' initial snow thickness in the north rn_hts_ini_n = ', rn_hts_ini_n |
|---|
| 537 | WRITE(numout,*) ' initial snow thickness in the south rn_hts_ini_s = ', rn_hts_ini_s |
|---|
| 538 | WRITE(numout,*) ' initial ice thickness in the north rn_hti_ini_n = ', rn_hti_ini_n |
|---|
| 539 | WRITE(numout,*) ' initial ice thickness in the south rn_hti_ini_s = ', rn_hti_ini_s |
|---|
| 540 | WRITE(numout,*) ' initial ice concentr. in the north rn_ati_ini_n = ', rn_ati_ini_n |
|---|
| 541 | WRITE(numout,*) ' initial ice concentr. in the north rn_ati_ini_s = ', rn_ati_ini_s |
|---|
| 542 | WRITE(numout,*) ' initial ice salinity in the north rn_smi_ini_n = ', rn_smi_ini_n |
|---|
| 543 | WRITE(numout,*) ' initial ice salinity in the south rn_smi_ini_s = ', rn_smi_ini_s |
|---|
| 544 | WRITE(numout,*) ' initial ice/snw temp in the north rn_tmi_ini_n = ', rn_tmi_ini_n |
|---|
| 545 | WRITE(numout,*) ' initial ice/snw temp in the south rn_tmi_ini_s = ', rn_tmi_ini_s |
|---|
| 546 | ENDIF |
|---|
| 547 | |
|---|
| 548 | IF( ln_iceini_file ) THEN ! Ice initialization using input file |
|---|
| 549 | ! |
|---|
| 550 | ! set si structure |
|---|
| 551 | ALLOCATE( si(jpfldi), STAT=ierror ) |
|---|
| 552 | IF( ierror > 0 ) THEN |
|---|
| 553 | CALL ctl_stop( 'Ice_ini in limistate: unable to allocate si structure' ) ; RETURN |
|---|
| 554 | ENDIF |
|---|
| 555 | |
|---|
| 556 | DO ifpr = 1, jpfldi |
|---|
| 557 | ALLOCATE( si(ifpr)%fnow(jpi,jpj,1) ) |
|---|
| 558 | ALLOCATE( si(ifpr)%fdta(jpi,jpj,1,2) ) |
|---|
| 559 | END DO |
|---|
| 560 | |
|---|
| 561 | ! fill si with slf_i and control print |
|---|
| 562 | CALL fld_fill( si, slf_i, cn_dir, 'lim_istate', 'lim istate ini', 'numnam_ice' ) |
|---|
| 563 | |
|---|
| 564 | CALL fld_read( nit000, 1, si ) ! input fields provided at the current time-step |
|---|
| 565 | |
|---|
| 566 | ENDIF |
|---|
| 567 | |
|---|
| 568 | END SUBROUTINE lim_istate_init |
|---|
| 569 | |
|---|
| 570 | #else |
|---|
| 571 | !!---------------------------------------------------------------------- |
|---|
| 572 | !! Default option : Empty module NO LIM sea-ice model |
|---|
| 573 | !!---------------------------------------------------------------------- |
|---|
| 574 | CONTAINS |
|---|
| 575 | SUBROUTINE lim_istate ! Empty routine |
|---|
| 576 | END SUBROUTINE lim_istate |
|---|
| 577 | #endif |
|---|
| 578 | |
|---|
| 579 | !!====================================================================== |
|---|
| 580 | END MODULE limistate |
|---|
