| 1 | MODULE limistate |
|---|
| 2 | !!====================================================================== |
|---|
| 3 | !! *** MODULE limistate *** |
|---|
| 4 | !! Initialisation of diagnostics ice variables |
|---|
| 5 | !!====================================================================== |
|---|
| 6 | !! History : 2.0 ! 2004-01 (C. Ethe, G. Madec) Original code |
|---|
| 7 | !! 4.0 ! 2011-02 (G. Madec) dynamical allocation |
|---|
| 8 | !! - ! 2012 (C. Rousset) add par_oce (for jp_sal)...bug? |
|---|
| 9 | !!---------------------------------------------------------------------- |
|---|
| 10 | #if defined key_lim3 |
|---|
| 11 | !!---------------------------------------------------------------------- |
|---|
| 12 | !! 'key_lim3' : LIM3 sea-ice model |
|---|
| 13 | !!---------------------------------------------------------------------- |
|---|
| 14 | !! lim_istate : Initialisation of diagnostics ice variables |
|---|
| 15 | !! lim_istate_init : initialization of ice state and namelist read |
|---|
| 16 | !!---------------------------------------------------------------------- |
|---|
| 17 | USE phycst ! physical constant |
|---|
| 18 | USE oce ! dynamics and tracers variables |
|---|
| 19 | USE dom_oce ! ocean domain |
|---|
| 20 | USE sbc_oce ! Surface boundary condition: ocean fields |
|---|
| 21 | USE sbc_ice ! Surface boundary condition: ice fields |
|---|
| 22 | USE eosbn2 ! equation of state |
|---|
| 23 | USE ice ! sea-ice variables |
|---|
| 24 | USE par_ice ! ice parameters |
|---|
| 25 | USE par_oce ! ocean parameters |
|---|
| 26 | USE dom_ice ! sea-ice domain |
|---|
| 27 | USE in_out_manager ! I/O manager |
|---|
| 28 | USE lib_mpp ! MPP library |
|---|
| 29 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
|---|
| 30 | USE wrk_nemo ! work arrays |
|---|
| 31 | USE cpl_oasis3, ONLY : lk_cpl |
|---|
| 32 | |
|---|
| 33 | IMPLICIT NONE |
|---|
| 34 | PRIVATE |
|---|
| 35 | |
|---|
| 36 | PUBLIC lim_istate ! routine called by lim_init.F90 |
|---|
| 37 | |
|---|
| 38 | !! * Module variables |
|---|
| 39 | ! !!** init namelist (namiceini) ** |
|---|
| 40 | REAL(wp) :: thres_sst ! threshold water temperature for initial sea ice |
|---|
| 41 | REAL(wp) :: hts_ini_n ! initial snow thickness in the north |
|---|
| 42 | REAL(wp) :: hts_ini_s ! initial snow thickness in the south |
|---|
| 43 | REAL(wp) :: hti_ini_n ! initial ice thickness in the north |
|---|
| 44 | REAL(wp) :: hti_ini_s ! initial ice thickness in the south |
|---|
| 45 | REAL(wp) :: ati_ini_n ! initial leads area in the north |
|---|
| 46 | REAL(wp) :: ati_ini_s ! initial leads area in the south |
|---|
| 47 | REAL(wp) :: smi_ini_n ! initial salinity |
|---|
| 48 | REAL(wp) :: smi_ini_s ! initial salinity |
|---|
| 49 | REAL(wp) :: tmi_ini_n ! initial temperature |
|---|
| 50 | REAL(wp) :: tmi_ini_s ! initial temperature |
|---|
| 51 | |
|---|
| 52 | LOGICAL :: ln_limini ! initialization or not |
|---|
| 53 | !!---------------------------------------------------------------------- |
|---|
| 54 | !! LIM 3.0, UCL-LOCEAN-IPSL (2008) |
|---|
| 55 | !! $Id: limistate.F90 4765 2014-09-16 12:55:11Z rblod $ |
|---|
| 56 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
|---|
| 57 | !!---------------------------------------------------------------------- |
|---|
| 58 | |
|---|
| 59 | CONTAINS |
|---|
| 60 | |
|---|
| 61 | SUBROUTINE lim_istate |
|---|
| 62 | !!------------------------------------------------------------------- |
|---|
| 63 | !! *** ROUTINE lim_istate *** |
|---|
| 64 | !! |
|---|
| 65 | !! ** Purpose : defined the sea-ice initial state |
|---|
| 66 | !! |
|---|
| 67 | !! ** Method : |
|---|
| 68 | !! This routine will put some ice where ocean |
|---|
| 69 | !! is at the freezing point, then fill in ice |
|---|
| 70 | !! state variables using prescribed initial |
|---|
| 71 | !! values in the namelist |
|---|
| 72 | !! |
|---|
| 73 | !! ** Steps : |
|---|
| 74 | !! 1) Read namelist |
|---|
| 75 | !! 2) Basal temperature; ice and hemisphere masks |
|---|
| 76 | !! 3) Fill in the ice thickness distribution using gaussian |
|---|
| 77 | !! 4) Fill in space-dependent arrays for state variables |
|---|
| 78 | !! 5) Diagnostic arrays |
|---|
| 79 | !! 6) Lateral boundary conditions |
|---|
| 80 | !! |
|---|
| 81 | !! ** Notes : o_i, t_su, t_s, t_i, s_i must be filled everywhere, even |
|---|
| 82 | !! where there is no ice (clem: I do not know why but it is mandatory) |
|---|
| 83 | !! |
|---|
| 84 | !! History : |
|---|
| 85 | !! 2.0 ! 01-04 (C. Ethe, G. Madec) Original code |
|---|
| 86 | !! 3.0 ! 2007 (M. Vancoppenolle) Rewrite for ice cats |
|---|
| 87 | !! 4.0 ! 09-11 (M. Vancoppenolle) Enhanced version for ice cats |
|---|
| 88 | !!-------------------------------------------------------------------- |
|---|
| 89 | |
|---|
| 90 | !! * Local variables |
|---|
| 91 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
|---|
| 92 | REAL(wp) :: epsi20, ztmelts, zdh |
|---|
| 93 | INTEGER :: i_hemis, i_fill, jl0 |
|---|
| 94 | REAL(wp) :: ztest_1, ztest_2, ztest_3, ztest_4, ztests, zsigma, zarg, zA, zV, zA_cons, zV_cons, zconv |
|---|
| 95 | REAL(wp), POINTER, DIMENSION(:) :: zht_i_ini, zat_i_ini, zvt_i_ini, zht_s_ini, zsm_i_ini, ztm_i_ini |
|---|
| 96 | REAL(wp), POINTER, DIMENSION(:,:) :: zh_i_ini, za_i_ini, zv_i_ini |
|---|
| 97 | REAL(wp), POINTER, DIMENSION(:,:) :: zswitch ! ice indicator |
|---|
| 98 | INTEGER, POINTER, DIMENSION(:,:) :: zhemis ! hemispheric index |
|---|
| 99 | !-------------------------------------------------------------------- |
|---|
| 100 | |
|---|
| 101 | CALL wrk_alloc( jpi, jpj, zswitch ) |
|---|
| 102 | CALL wrk_alloc( jpi, jpj, zhemis ) |
|---|
| 103 | CALL wrk_alloc( jpl, 2, zh_i_ini, za_i_ini, zv_i_ini ) |
|---|
| 104 | CALL wrk_alloc( 2, zht_i_ini, zat_i_ini, zvt_i_ini, zht_s_ini, zsm_i_ini, ztm_i_ini ) |
|---|
| 105 | |
|---|
| 106 | epsi20 = 1.e-20_wp |
|---|
| 107 | |
|---|
| 108 | IF(lwp) WRITE(numout,*) |
|---|
| 109 | IF(lwp) WRITE(numout,*) 'lim_istate : Ice initialization ' |
|---|
| 110 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ' |
|---|
| 111 | |
|---|
| 112 | !-------------------------------------------------------------------- |
|---|
| 113 | ! 1) Read namelist |
|---|
| 114 | !-------------------------------------------------------------------- |
|---|
| 115 | |
|---|
| 116 | CALL lim_istate_init ! reading the initials parameters of the ice |
|---|
| 117 | |
|---|
| 118 | ! surface temperature |
|---|
| 119 | DO jl = 1, jpl ! loop over categories |
|---|
| 120 | t_su (:,:,jl) = rtt * tms(:,:) |
|---|
| 121 | tn_ice(:,:,jl) = rtt * tms(:,:) |
|---|
| 122 | END DO |
|---|
| 123 | ! Basal temperature is set to the freezing point of seawater in Kelvin |
|---|
| 124 | t_bo(:,:) = ( tfreez( tsn(:,:,1,jp_sal) ) + rt0 ) * tms(:,:) |
|---|
| 125 | |
|---|
| 126 | IF( ln_limini ) THEN |
|---|
| 127 | |
|---|
| 128 | !-------------------------------------------------------------------- |
|---|
| 129 | ! 2) Basal temperature, ice mask and hemispheric index |
|---|
| 130 | !-------------------------------------------------------------------- |
|---|
| 131 | ! ice if sst <= t-freez + thres_sst |
|---|
| 132 | DO jj = 1, jpj |
|---|
| 133 | DO ji = 1, jpi |
|---|
| 134 | IF( ( tsn(ji,jj,1,jp_tem) - ( t_bo(ji,jj) - rt0 ) ) * tms(ji,jj) >= thres_sst ) THEN |
|---|
| 135 | zswitch(ji,jj) = 0._wp * tms(ji,jj) ! no ice |
|---|
| 136 | ELSE |
|---|
| 137 | zswitch(ji,jj) = 1._wp * tms(ji,jj) ! ice |
|---|
| 138 | ENDIF |
|---|
| 139 | END DO |
|---|
| 140 | END DO |
|---|
| 141 | |
|---|
| 142 | |
|---|
| 143 | ! Hemispheric index |
|---|
| 144 | ! MV 2011 new initialization |
|---|
| 145 | DO jj = 1, jpj |
|---|
| 146 | DO ji = 1, jpi |
|---|
| 147 | IF( fcor(ji,jj) >= 0._wp ) THEN |
|---|
| 148 | zhemis(ji,jj) = 1 ! Northern hemisphere |
|---|
| 149 | ELSE |
|---|
| 150 | zhemis(ji,jj) = 2 ! Southern hemisphere |
|---|
| 151 | ENDIF |
|---|
| 152 | END DO |
|---|
| 153 | END DO |
|---|
| 154 | ! END MV 2011 new initialization |
|---|
| 155 | |
|---|
| 156 | !-------------------------------------------------------------------- |
|---|
| 157 | ! 3) Initialization of sea ice state variables |
|---|
| 158 | !-------------------------------------------------------------------- |
|---|
| 159 | |
|---|
| 160 | !----------------------------- |
|---|
| 161 | ! 3.1) Hemisphere-dependent arrays |
|---|
| 162 | !----------------------------- |
|---|
| 163 | ! assign initial thickness, concentration, snow depth and salinity to an hemisphere-dependent array |
|---|
| 164 | zht_i_ini(1) = hti_ini_n ; zht_i_ini(2) = hti_ini_s ! ice thickness |
|---|
| 165 | zht_s_ini(1) = hts_ini_n ; zht_s_ini(2) = hts_ini_s ! snow depth |
|---|
| 166 | zat_i_ini(1) = ati_ini_n ; zat_i_ini(2) = ati_ini_s ! ice concentration |
|---|
| 167 | zsm_i_ini(1) = smi_ini_n ; zsm_i_ini(2) = smi_ini_s ! bulk ice salinity |
|---|
| 168 | ztm_i_ini(1) = tmi_ini_n ; ztm_i_ini(2) = tmi_ini_s ! temperature (ice and snow) |
|---|
| 169 | |
|---|
| 170 | zvt_i_ini(:) = zht_i_ini(:) * zat_i_ini(:) ! ice volume |
|---|
| 171 | |
|---|
| 172 | !--------------------------------------------------------------------- |
|---|
| 173 | ! 3.2) Distribute ice concentration and thickness into the categories |
|---|
| 174 | !--------------------------------------------------------------------- |
|---|
| 175 | ! a gaussian distribution for ice concentration is used |
|---|
| 176 | ! then we check whether the distribution fullfills |
|---|
| 177 | ! volume and area conservation, positivity and ice categories bounds |
|---|
| 178 | DO i_hemis = 1, 2 |
|---|
| 179 | |
|---|
| 180 | ztest_1 = 0 ; ztest_2 = 0 ; ztest_3 = 0 ; ztest_4 = 0 |
|---|
| 181 | |
|---|
| 182 | ! note for the great nemo engineers: |
|---|
| 183 | ! only very few of the WRITE statements are necessary for the reference version |
|---|
| 184 | ! they were one day useful, but now i personally doubt of their |
|---|
| 185 | ! potential for bringing anything useful |
|---|
| 186 | |
|---|
| 187 | DO i_fill = jpl, 1, -1 |
|---|
| 188 | IF ( ( ztest_1 + ztest_2 + ztest_3 + ztest_4 ) .NE. 4 ) THEN |
|---|
| 189 | !---------------------------- |
|---|
| 190 | ! fill the i_fill categories |
|---|
| 191 | !---------------------------- |
|---|
| 192 | ! *** 1 category to fill |
|---|
| 193 | IF ( i_fill .EQ. 1 ) THEN |
|---|
| 194 | zh_i_ini(1,i_hemis) = zht_i_ini(i_hemis) |
|---|
| 195 | za_i_ini(1,i_hemis) = zat_i_ini(i_hemis) |
|---|
| 196 | zh_i_ini(2:jpl,i_hemis) = 0._wp |
|---|
| 197 | za_i_ini(2:jpl,i_hemis) = 0._wp |
|---|
| 198 | ELSE |
|---|
| 199 | |
|---|
| 200 | ! *** >1 categores to fill |
|---|
| 201 | !--- Ice thicknesses in the i_fill - 1 first categories |
|---|
| 202 | DO jl = 1, i_fill - 1 |
|---|
| 203 | zh_i_ini(jl,i_hemis) = 0.5 * ( hi_max(jl) + hi_max(jl-1) ) |
|---|
| 204 | END DO |
|---|
| 205 | |
|---|
| 206 | !--- jl0: most likely index where cc will be maximum |
|---|
| 207 | DO jl = 1, jpl |
|---|
| 208 | IF ( ( zht_i_ini(i_hemis) .GT. hi_max(jl-1) ) .AND. & |
|---|
| 209 | ( zht_i_ini(i_hemis) .LE. hi_max(jl) ) ) THEN |
|---|
| 210 | jl0 = jl |
|---|
| 211 | ENDIF |
|---|
| 212 | END DO |
|---|
| 213 | jl0 = MIN(jl0, i_fill) |
|---|
| 214 | |
|---|
| 215 | !--- Concentrations |
|---|
| 216 | za_i_ini(jl0,i_hemis) = zat_i_ini(i_hemis) / SQRT(REAL(jpl)) |
|---|
| 217 | DO jl = 1, i_fill - 1 |
|---|
| 218 | IF ( jl .NE. jl0 ) THEN |
|---|
| 219 | zsigma = 0.5 * zht_i_ini(i_hemis) |
|---|
| 220 | zarg = ( zh_i_ini(jl,i_hemis) - zht_i_ini(i_hemis) ) / zsigma |
|---|
| 221 | za_i_ini(jl,i_hemis) = za_i_ini(jl0,i_hemis) * EXP(-zarg**2) |
|---|
| 222 | ENDIF |
|---|
| 223 | END DO |
|---|
| 224 | |
|---|
| 225 | zA = 0. ! sum of the areas in the jpl categories |
|---|
| 226 | DO jl = 1, i_fill - 1 |
|---|
| 227 | zA = zA + za_i_ini(jl,i_hemis) |
|---|
| 228 | END DO |
|---|
| 229 | za_i_ini(i_fill,i_hemis) = zat_i_ini(i_hemis) - zA ! ice conc in the last category |
|---|
| 230 | IF ( i_fill .LT. jpl ) za_i_ini(i_fill+1:jpl, i_hemis) = 0._wp |
|---|
| 231 | |
|---|
| 232 | !--- Ice thickness in the last category |
|---|
| 233 | zV = 0. ! sum of the volumes of the N-1 categories |
|---|
| 234 | DO jl = 1, i_fill - 1 |
|---|
| 235 | zV = zV + za_i_ini(jl,i_hemis)*zh_i_ini(jl,i_hemis) |
|---|
| 236 | END DO |
|---|
| 237 | zh_i_ini(i_fill,i_hemis) = ( zvt_i_ini(i_hemis) - zV ) / za_i_ini(i_fill,i_hemis) |
|---|
| 238 | IF ( i_fill .LT. jpl ) zh_i_ini(i_fill+1:jpl, i_hemis) = 0._wp |
|---|
| 239 | |
|---|
| 240 | !--- volumes |
|---|
| 241 | zv_i_ini(:,i_hemis) = za_i_ini(:,i_hemis) * zh_i_ini(:,i_hemis) |
|---|
| 242 | IF ( i_fill .LT. jpl ) zv_i_ini(i_fill+1:jpl, i_hemis) = 0._wp |
|---|
| 243 | |
|---|
| 244 | ENDIF ! i_fill |
|---|
| 245 | |
|---|
| 246 | !--------------------- |
|---|
| 247 | ! Compatibility tests |
|---|
| 248 | !--------------------- |
|---|
| 249 | ! Test 1: area conservation |
|---|
| 250 | zA_cons = SUM(za_i_ini(:,i_hemis)) ; zconv = ABS(zat_i_ini(i_hemis) - zA_cons ) |
|---|
| 251 | IF ( zconv .LT. 1.0e-6 ) THEN |
|---|
| 252 | ztest_1 = 1 |
|---|
| 253 | ELSE |
|---|
| 254 | ! this write is useful |
|---|
| 255 | IF(lwp) WRITE(numout,*) ' * TEST1 AREA NOT CONSERVED *** zA_cons = ', zA_cons,' zat_i_ini = ',zat_i_ini(i_hemis) |
|---|
| 256 | ztest_1 = 0 |
|---|
| 257 | ENDIF |
|---|
| 258 | |
|---|
| 259 | ! Test 2: volume conservation |
|---|
| 260 | zV_cons = SUM(zv_i_ini(:,i_hemis)) |
|---|
| 261 | zconv = ABS(zvt_i_ini(i_hemis) - zV_cons) |
|---|
| 262 | |
|---|
| 263 | IF ( zconv .LT. 1.0e-6 ) THEN |
|---|
| 264 | ztest_2 = 1 |
|---|
| 265 | ELSE |
|---|
| 266 | ! this write is useful |
|---|
| 267 | IF(lwp) WRITE(numout,*) ' * TEST2 VOLUME NOT CONSERVED *** zV_cons = ', zV_cons, & |
|---|
| 268 | ' zvt_i_ini = ', zvt_i_ini(i_hemis) |
|---|
| 269 | ztest_2 = 0 |
|---|
| 270 | ENDIF |
|---|
| 271 | |
|---|
| 272 | ! Test 3: thickness of the last category is in-bounds ? |
|---|
| 273 | IF ( zh_i_ini(i_fill, i_hemis) .GT. hi_max(i_fill-1) ) THEN |
|---|
| 274 | ztest_3 = 1 |
|---|
| 275 | ELSE |
|---|
| 276 | ! this write is useful |
|---|
| 277 | IF(lwp) WRITE(numout,*) ' * TEST 3 THICKNESS OF THE LAST CATEGORY OUT OF BOUNDS *** zh_i_ini(i_fill,i_hemis) = ', & |
|---|
| 278 | zh_i_ini(i_fill,i_hemis), ' hi_max(jpl-1) = ', hi_max(i_fill-1) |
|---|
| 279 | ztest_3 = 0 |
|---|
| 280 | ENDIF |
|---|
| 281 | |
|---|
| 282 | ! Test 4: positivity of ice concentrations |
|---|
| 283 | ztest_4 = 1 |
|---|
| 284 | DO jl = 1, jpl |
|---|
| 285 | IF ( za_i_ini(jl,i_hemis) .LT. 0._wp ) THEN |
|---|
| 286 | ! this write is useful |
|---|
| 287 | IF(lwp) WRITE(numout,*) ' * TEST 4 POSITIVITY NOT OK FOR CAT ', jl, ' WITH A = ', za_i_ini(jl,i_hemis) |
|---|
| 288 | ztest_4 = 0 |
|---|
| 289 | ENDIF |
|---|
| 290 | END DO |
|---|
| 291 | |
|---|
| 292 | ENDIF ! ztest_1 + ztest_2 + ztest_3 + ztest_4 |
|---|
| 293 | |
|---|
| 294 | ztests = ztest_1 + ztest_2 + ztest_3 + ztest_4 |
|---|
| 295 | |
|---|
| 296 | END DO ! i_fill |
|---|
| 297 | |
|---|
| 298 | IF(lwp) THEN |
|---|
| 299 | WRITE(numout,*), ' ztests : ', ztests |
|---|
| 300 | IF ( ztests .NE. 4 ) THEN |
|---|
| 301 | WRITE(numout,*) |
|---|
| 302 | WRITE(numout,*), ' !!!! ALERT !!! ' |
|---|
| 303 | WRITE(numout,*), ' !!!! Something is wrong in the LIM3 initialization procedure ' |
|---|
| 304 | WRITE(numout,*) |
|---|
| 305 | WRITE(numout,*), ' *** ztests is not equal to 4 ' |
|---|
| 306 | WRITE(numout,*), ' *** ztest_i (i=1,4) = ', ztest_1, ztest_2, ztest_3, ztest_4 |
|---|
| 307 | WRITE(numout,*), ' zat_i_ini : ', zat_i_ini(i_hemis) |
|---|
| 308 | WRITE(numout,*), ' zht_i_ini : ', zht_i_ini(i_hemis) |
|---|
| 309 | ENDIF ! ztests .NE. 4 |
|---|
| 310 | ENDIF |
|---|
| 311 | |
|---|
| 312 | END DO ! i_hemis |
|---|
| 313 | |
|---|
| 314 | !--------------------------------------------------------------------- |
|---|
| 315 | ! 3.3) Space-dependent arrays for ice state variables |
|---|
| 316 | !--------------------------------------------------------------------- |
|---|
| 317 | |
|---|
| 318 | ! Ice concentration, thickness and volume, ice salinity, ice age, surface temperature |
|---|
| 319 | DO jl = 1, jpl ! loop over categories |
|---|
| 320 | DO jj = 1, jpj |
|---|
| 321 | DO ji = 1, jpi |
|---|
| 322 | a_i(ji,jj,jl) = zswitch(ji,jj) * za_i_ini (jl,zhemis(ji,jj)) ! concentration |
|---|
| 323 | ht_i(ji,jj,jl) = zswitch(ji,jj) * zh_i_ini(jl,zhemis(ji,jj)) ! ice thickness |
|---|
| 324 | ht_s(ji,jj,jl) = ht_i(ji,jj,jl) * ( zht_s_ini( zhemis(ji,jj) ) / zht_i_ini( zhemis(ji,jj) ) ) ! snow depth |
|---|
| 325 | sm_i(ji,jj,jl) = zswitch(ji,jj) * zsm_i_ini(zhemis(ji,jj)) !+ ( 1._wp - zswitch(ji,jj) ) * s_i_min ! salinity |
|---|
| 326 | o_i(ji,jj,jl) = zswitch(ji,jj) * 1._wp + ( 1._wp - zswitch(ji,jj) ) ! age |
|---|
| 327 | t_su(ji,jj,jl) = zswitch(ji,jj) * ztm_i_ini(zhemis(ji,jj)) + ( 1._wp - zswitch(ji,jj) ) * rtt ! surf temp |
|---|
| 328 | |
|---|
| 329 | ! This case below should not be used if (ht_s/ht_i) is ok in namelist |
|---|
| 330 | ! In case snow load is in excess that would lead to transformation from snow to ice |
|---|
| 331 | ! Then, transfer the snow excess into the ice (different from limthd_dh) |
|---|
| 332 | zdh = MAX( 0._wp, ( rhosn * ht_s(ji,jj,jl) + ( rhoic - rau0 ) * ht_i(ji,jj,jl) ) * r1_rau0 ) |
|---|
| 333 | ! recompute ht_i, ht_s avoiding out of bounds values |
|---|
| 334 | ht_i(ji,jj,jl) = MIN( hi_max(jl), ht_i(ji,jj,jl) + zdh ) |
|---|
| 335 | ht_s(ji,jj,jl) = MAX( 0._wp, ht_s(ji,jj,jl) - zdh * rhoic / rhosn ) |
|---|
| 336 | |
|---|
| 337 | ! ice volume, salt content, age content |
|---|
| 338 | v_i(ji,jj,jl) = ht_i(ji,jj,jl) * a_i(ji,jj,jl) ! ice volume |
|---|
| 339 | v_s(ji,jj,jl) = ht_s(ji,jj,jl) * a_i(ji,jj,jl) ! snow volume |
|---|
| 340 | smv_i(ji,jj,jl) = MIN( sm_i(ji,jj,jl) , sss_m(ji,jj) ) * v_i(ji,jj,jl) ! salt content |
|---|
| 341 | oa_i(ji,jj,jl) = o_i(ji,jj,jl) * a_i(ji,jj,jl) ! age content |
|---|
| 342 | END DO ! ji |
|---|
| 343 | END DO ! jj |
|---|
| 344 | END DO ! jl |
|---|
| 345 | |
|---|
| 346 | ! Snow temperature and heat content |
|---|
| 347 | DO jk = 1, nlay_s |
|---|
| 348 | DO jl = 1, jpl ! loop over categories |
|---|
| 349 | DO jj = 1, jpj |
|---|
| 350 | DO ji = 1, jpi |
|---|
| 351 | t_s(ji,jj,jk,jl) = zswitch(ji,jj) * ztm_i_ini(zhemis(ji,jj)) + ( 1._wp - zswitch(ji,jj) ) * rtt |
|---|
| 352 | ! Snow energy of melting |
|---|
| 353 | e_s(ji,jj,jk,jl) = zswitch(ji,jj) * rhosn * ( cpic * ( rtt - t_s(ji,jj,jk,jl) ) + lfus ) |
|---|
| 354 | ! Change dimensions |
|---|
| 355 | e_s(ji,jj,jk,jl) = e_s(ji,jj,jk,jl) / unit_fac |
|---|
| 356 | ! Multiply by volume, so that heat content in Joules |
|---|
| 357 | e_s(ji,jj,jk,jl) = e_s(ji,jj,jk,jl) * area(ji,jj) * v_s(ji,jj,jl) / nlay_s |
|---|
| 358 | END DO ! ji |
|---|
| 359 | END DO ! jj |
|---|
| 360 | END DO ! jl |
|---|
| 361 | END DO ! jk |
|---|
| 362 | |
|---|
| 363 | ! Ice salinity, temperature and heat content |
|---|
| 364 | DO jk = 1, nlay_i |
|---|
| 365 | DO jl = 1, jpl ! loop over categories |
|---|
| 366 | DO jj = 1, jpj |
|---|
| 367 | DO ji = 1, jpi |
|---|
| 368 | t_i(ji,jj,jk,jl) = zswitch(ji,jj) * ztm_i_ini(zhemis(ji,jj)) + ( 1._wp - zswitch(ji,jj) ) * rtt |
|---|
| 369 | s_i(ji,jj,jk,jl) = zswitch(ji,jj) * zsm_i_ini(zhemis(ji,jj)) !+ ( 1._wp - zswitch(ji,jj) ) * s_i_min |
|---|
| 370 | ztmelts = - tmut * s_i(ji,jj,jk,jl) + rtt !Melting temperature in K |
|---|
| 371 | |
|---|
| 372 | ! heat content per unit volume |
|---|
| 373 | e_i(ji,jj,jk,jl) = zswitch(ji,jj) * rhoic * ( cpic * ( ztmelts - t_i(ji,jj,jk,jl) ) & |
|---|
| 374 | + lfus * ( 1._wp - (ztmelts-rtt) / MIN((t_i(ji,jj,jk,jl)-rtt),-epsi20) ) & |
|---|
| 375 | - rcp * ( ztmelts - rtt ) ) |
|---|
| 376 | |
|---|
| 377 | ! Correct dimensions to avoid big values |
|---|
| 378 | e_i(ji,jj,jk,jl) = e_i(ji,jj,jk,jl) / unit_fac |
|---|
| 379 | |
|---|
| 380 | ! Mutliply by ice volume, and divide by number of layers to get heat content in J |
|---|
| 381 | e_i(ji,jj,jk,jl) = e_i(ji,jj,jk,jl) * area(ji,jj) * v_i(ji,jj,jl) / nlay_i |
|---|
| 382 | END DO ! ji |
|---|
| 383 | END DO ! jj |
|---|
| 384 | END DO ! jl |
|---|
| 385 | END DO ! jk |
|---|
| 386 | |
|---|
| 387 | tn_ice (:,:,:) = t_su (:,:,:) |
|---|
| 388 | |
|---|
| 389 | ELSE |
|---|
| 390 | ! if ln_limini=false |
|---|
| 391 | a_i (:,:,:) = 0._wp |
|---|
| 392 | v_i (:,:,:) = 0._wp |
|---|
| 393 | v_s (:,:,:) = 0._wp |
|---|
| 394 | smv_i(:,:,:) = 0._wp |
|---|
| 395 | oa_i (:,:,:) = 0._wp |
|---|
| 396 | ht_i (:,:,:) = 0._wp |
|---|
| 397 | ht_s (:,:,:) = 0._wp |
|---|
| 398 | sm_i (:,:,:) = 0._wp |
|---|
| 399 | o_i (:,:,:) = 0._wp |
|---|
| 400 | |
|---|
| 401 | e_i(:,:,:,:) = 0._wp |
|---|
| 402 | e_s(:,:,:,:) = 0._wp |
|---|
| 403 | |
|---|
| 404 | DO jl = 1, jpl |
|---|
| 405 | DO jk = 1, nlay_i |
|---|
| 406 | t_i(:,:,jk,jl) = rtt * tms(:,:) |
|---|
| 407 | END DO |
|---|
| 408 | DO jk = 1, nlay_s |
|---|
| 409 | t_s(:,:,jk,jl) = rtt * tms(:,:) |
|---|
| 410 | END DO |
|---|
| 411 | END DO |
|---|
| 412 | |
|---|
| 413 | ENDIF ! ln_limini |
|---|
| 414 | |
|---|
| 415 | at_i (:,:) = 0.0_wp |
|---|
| 416 | DO jl = 1, jpl |
|---|
| 417 | at_i (:,:) = at_i (:,:) + a_i (:,:,jl) |
|---|
| 418 | END DO |
|---|
| 419 | ! |
|---|
| 420 | !-------------------------------------------------------------------- |
|---|
| 421 | ! 4) Global ice variables for output diagnostics | |
|---|
| 422 | !-------------------------------------------------------------------- |
|---|
| 423 | u_ice (:,:) = 0._wp |
|---|
| 424 | v_ice (:,:) = 0._wp |
|---|
| 425 | stress1_i(:,:) = 0._wp |
|---|
| 426 | stress2_i(:,:) = 0._wp |
|---|
| 427 | stress12_i(:,:) = 0._wp |
|---|
| 428 | |
|---|
| 429 | !-------------------------------------------------------------------- |
|---|
| 430 | ! 5) Moments for advection |
|---|
| 431 | !-------------------------------------------------------------------- |
|---|
| 432 | |
|---|
| 433 | sxopw (:,:) = 0._wp |
|---|
| 434 | syopw (:,:) = 0._wp |
|---|
| 435 | sxxopw(:,:) = 0._wp |
|---|
| 436 | syyopw(:,:) = 0._wp |
|---|
| 437 | sxyopw(:,:) = 0._wp |
|---|
| 438 | |
|---|
| 439 | sxice (:,:,:) = 0._wp ; sxsn (:,:,:) = 0._wp ; sxa (:,:,:) = 0._wp |
|---|
| 440 | syice (:,:,:) = 0._wp ; sysn (:,:,:) = 0._wp ; sya (:,:,:) = 0._wp |
|---|
| 441 | sxxice(:,:,:) = 0._wp ; sxxsn(:,:,:) = 0._wp ; sxxa (:,:,:) = 0._wp |
|---|
| 442 | syyice(:,:,:) = 0._wp ; syysn(:,:,:) = 0._wp ; syya (:,:,:) = 0._wp |
|---|
| 443 | sxyice(:,:,:) = 0._wp ; sxysn(:,:,:) = 0._wp ; sxya (:,:,:) = 0._wp |
|---|
| 444 | |
|---|
| 445 | sxc0 (:,:,:) = 0._wp ; sxe (:,:,:,:)= 0._wp |
|---|
| 446 | syc0 (:,:,:) = 0._wp ; sye (:,:,:,:)= 0._wp |
|---|
| 447 | sxxc0 (:,:,:) = 0._wp ; sxxe (:,:,:,:)= 0._wp |
|---|
| 448 | syyc0 (:,:,:) = 0._wp ; syye (:,:,:,:)= 0._wp |
|---|
| 449 | sxyc0 (:,:,:) = 0._wp ; sxye (:,:,:,:)= 0._wp |
|---|
| 450 | |
|---|
| 451 | sxsal (:,:,:) = 0._wp |
|---|
| 452 | sysal (:,:,:) = 0._wp |
|---|
| 453 | sxxsal (:,:,:) = 0._wp |
|---|
| 454 | syysal (:,:,:) = 0._wp |
|---|
| 455 | sxysal (:,:,:) = 0._wp |
|---|
| 456 | |
|---|
| 457 | sxage (:,:,:) = 0._wp |
|---|
| 458 | syage (:,:,:) = 0._wp |
|---|
| 459 | sxxage (:,:,:) = 0._wp |
|---|
| 460 | syyage (:,:,:) = 0._wp |
|---|
| 461 | sxyage (:,:,:) = 0._wp |
|---|
| 462 | |
|---|
| 463 | |
|---|
| 464 | CALL wrk_dealloc( jpi, jpj, zswitch ) |
|---|
| 465 | CALL wrk_dealloc( jpi, jpj, zhemis ) |
|---|
| 466 | CALL wrk_dealloc( jpl, 2, zh_i_ini, za_i_ini, zv_i_ini ) |
|---|
| 467 | CALL wrk_dealloc( 2, zht_i_ini, zat_i_ini, zvt_i_ini, zht_s_ini, zsm_i_ini, ztm_i_ini ) |
|---|
| 468 | |
|---|
| 469 | END SUBROUTINE lim_istate |
|---|
| 470 | |
|---|
| 471 | SUBROUTINE lim_istate_init |
|---|
| 472 | !!------------------------------------------------------------------- |
|---|
| 473 | !! *** ROUTINE lim_istate_init *** |
|---|
| 474 | !! |
|---|
| 475 | !! ** Purpose : Definition of initial state of the ice |
|---|
| 476 | !! |
|---|
| 477 | !! ** Method : Read the namiceini namelist and check the parameter |
|---|
| 478 | !! values called at the first timestep (nit000) |
|---|
| 479 | !! |
|---|
| 480 | !! ** input : |
|---|
| 481 | !! Namelist namiceini |
|---|
| 482 | !! |
|---|
| 483 | !! history : |
|---|
| 484 | !! 8.5 ! 03-08 (C. Ethe) original code |
|---|
| 485 | !! 8.5 ! 07-11 (M. Vancoppenolle) rewritten initialization |
|---|
| 486 | !!----------------------------------------------------------------------------- |
|---|
| 487 | NAMELIST/namiceini/ ln_limini, thres_sst, hts_ini_n, hts_ini_s, hti_ini_n, hti_ini_s, & |
|---|
| 488 | & ati_ini_n, ati_ini_s, smi_ini_n, smi_ini_s, tmi_ini_n, tmi_ini_s |
|---|
| 489 | INTEGER :: ios ! Local integer output status for namelist read |
|---|
| 490 | !!----------------------------------------------------------------------------- |
|---|
| 491 | ! |
|---|
| 492 | REWIND( numnam_ice_ref ) ! Namelist namiceini in reference namelist : Ice initial state |
|---|
| 493 | READ ( numnam_ice_ref, namiceini, IOSTAT = ios, ERR = 901) |
|---|
| 494 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namiceini in reference namelist', lwp ) |
|---|
| 495 | |
|---|
| 496 | REWIND( numnam_ice_cfg ) ! Namelist namiceini in configuration namelist : Ice initial state |
|---|
| 497 | READ ( numnam_ice_cfg, namiceini, IOSTAT = ios, ERR = 902 ) |
|---|
| 498 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namiceini in configuration namelist', lwp ) |
|---|
| 499 | IF(lwm) WRITE ( numoni, namiceini ) |
|---|
| 500 | |
|---|
| 501 | ! Define the initial parameters |
|---|
| 502 | ! ------------------------- |
|---|
| 503 | |
|---|
| 504 | IF(lwp) THEN |
|---|
| 505 | WRITE(numout,*) |
|---|
| 506 | WRITE(numout,*) 'lim_istate_init : ice parameters inititialisation ' |
|---|
| 507 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
|---|
| 508 | WRITE(numout,*) ' initialization with ice (T) or not (F) ln_limini = ', ln_limini |
|---|
| 509 | WRITE(numout,*) ' threshold water temp. for initial sea-ice thres_sst = ', thres_sst |
|---|
| 510 | WRITE(numout,*) ' initial snow thickness in the north hts_ini_n = ', hts_ini_n |
|---|
| 511 | WRITE(numout,*) ' initial snow thickness in the south hts_ini_s = ', hts_ini_s |
|---|
| 512 | WRITE(numout,*) ' initial ice thickness in the north hti_ini_n = ', hti_ini_n |
|---|
| 513 | WRITE(numout,*) ' initial ice thickness in the south hti_ini_s = ', hti_ini_s |
|---|
| 514 | WRITE(numout,*) ' initial ice concentr. in the north ati_ini_n = ', ati_ini_n |
|---|
| 515 | WRITE(numout,*) ' initial ice concentr. in the north ati_ini_s = ', ati_ini_s |
|---|
| 516 | WRITE(numout,*) ' initial ice salinity in the north smi_ini_n = ', smi_ini_n |
|---|
| 517 | WRITE(numout,*) ' initial ice salinity in the south smi_ini_s = ', smi_ini_s |
|---|
| 518 | WRITE(numout,*) ' initial ice/snw temp in the north tmi_ini_n = ', tmi_ini_n |
|---|
| 519 | WRITE(numout,*) ' initial ice/snw temp in the south tmi_ini_s = ', tmi_ini_s |
|---|
| 520 | ENDIF |
|---|
| 521 | |
|---|
| 522 | END SUBROUTINE lim_istate_init |
|---|
| 523 | |
|---|
| 524 | #else |
|---|
| 525 | !!---------------------------------------------------------------------- |
|---|
| 526 | !! Default option : Empty module NO LIM sea-ice model |
|---|
| 527 | !!---------------------------------------------------------------------- |
|---|
| 528 | CONTAINS |
|---|
| 529 | SUBROUTINE lim_istate ! Empty routine |
|---|
| 530 | END SUBROUTINE lim_istate |
|---|
| 531 | #endif |
|---|
| 532 | |
|---|
| 533 | !!====================================================================== |
|---|
| 534 | END MODULE limistate |
|---|
