[8514] | 1 | MODULE iceistate |
---|
| 2 | !!====================================================================== |
---|
| 3 | !! *** MODULE iceistate *** |
---|
[8534] | 4 | !! sea-ice : Initialization of ice variables |
---|
[8514] | 5 | !!====================================================================== |
---|
| 6 | !! History : 2.0 ! 2004-01 (C. Ethe, G. Madec) Original code |
---|
| 7 | !! 3.0 ! 2007 (M. Vancoppenolle) Rewrite for ice cats |
---|
| 8 | !! 3.0 ! 2009-11 (M. Vancoppenolle) Enhanced version for ice cats |
---|
| 9 | !! 3.0 ! 2011-02 (G. Madec) dynamical allocation |
---|
| 10 | !! - ! 2014 (C. Rousset) add N/S initializations |
---|
| 11 | !!---------------------------------------------------------------------- |
---|
| 12 | #if defined key_lim3 |
---|
| 13 | !!---------------------------------------------------------------------- |
---|
[8534] | 14 | !! 'key_lim3' ESIM sea-ice model |
---|
[8514] | 15 | !!---------------------------------------------------------------------- |
---|
| 16 | !! ice_istate : initialization of diagnostics ice variables |
---|
| 17 | !! ice_istate_init : initialization of ice state and namelist read |
---|
| 18 | !!---------------------------------------------------------------------- |
---|
| 19 | USE phycst ! physical constant |
---|
| 20 | USE oce ! dynamics and tracers variables |
---|
| 21 | USE dom_oce ! ocean domain |
---|
[8518] | 22 | USE sbc_oce , ONLY : sst_m, sss_m, ln_ice_embd |
---|
| 23 | USE sbc_ice , ONLY : tn_ice, snwice_mass, snwice_mass_b |
---|
[8514] | 24 | USE eosbn2 ! equation of state |
---|
[8518] | 25 | USE domvvl ! Variable volume |
---|
[8514] | 26 | USE ice ! sea-ice variables |
---|
| 27 | USE icevar ! ice_var_salprof |
---|
| 28 | ! |
---|
| 29 | USE in_out_manager ! I/O manager |
---|
[8534] | 30 | USE iom ! I/O manager library |
---|
[8514] | 31 | USE lib_mpp ! MPP library |
---|
[8534] | 32 | USE lib_fortran ! fortran utilities (glob_sum + no signed zero) |
---|
[8514] | 33 | USE fldread ! read input fields |
---|
| 34 | |
---|
| 35 | IMPLICIT NONE |
---|
| 36 | PRIVATE |
---|
| 37 | |
---|
[8515] | 38 | PUBLIC ice_istate ! called by icestp.F90 |
---|
| 39 | PUBLIC ice_istate_init ! called by icestp.F90 |
---|
[8514] | 40 | |
---|
| 41 | INTEGER , PARAMETER :: jpfldi = 6 ! maximum number of files to read |
---|
| 42 | INTEGER , PARAMETER :: jp_hti = 1 ! index of ice thickness (m) at T-point |
---|
| 43 | INTEGER , PARAMETER :: jp_hts = 2 ! index of snow thicknes (m) at T-point |
---|
| 44 | INTEGER , PARAMETER :: jp_ati = 3 ! index of ice fraction (%) at T-point |
---|
| 45 | INTEGER , PARAMETER :: jp_tsu = 4 ! index of ice surface temp (K) at T-point |
---|
| 46 | INTEGER , PARAMETER :: jp_tmi = 5 ! index of ice temp at T-point |
---|
| 47 | INTEGER , PARAMETER :: jp_smi = 6 ! index of ice sali at T-point |
---|
| 48 | TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: si ! structure of input fields (file informations, fields read) |
---|
| 49 | ! |
---|
[8531] | 50 | ! ** namelist (namini) ** |
---|
[8514] | 51 | LOGICAL :: ln_iceini ! initialization or not |
---|
| 52 | LOGICAL :: ln_iceini_file ! Ice initialization state from 2D netcdf file |
---|
| 53 | REAL(wp) :: rn_thres_sst ! threshold water temperature for initial sea ice |
---|
| 54 | REAL(wp) :: rn_hts_ini_n ! initial snow thickness in the north |
---|
| 55 | REAL(wp) :: rn_hts_ini_s ! initial snow thickness in the south |
---|
| 56 | REAL(wp) :: rn_hti_ini_n ! initial ice thickness in the north |
---|
| 57 | REAL(wp) :: rn_hti_ini_s ! initial ice thickness in the south |
---|
| 58 | REAL(wp) :: rn_ati_ini_n ! initial leads area in the north |
---|
| 59 | REAL(wp) :: rn_ati_ini_s ! initial leads area in the south |
---|
| 60 | REAL(wp) :: rn_smi_ini_n ! initial salinity |
---|
| 61 | REAL(wp) :: rn_smi_ini_s ! initial salinity |
---|
| 62 | REAL(wp) :: rn_tmi_ini_n ! initial temperature |
---|
| 63 | REAL(wp) :: rn_tmi_ini_s ! initial temperature |
---|
| 64 | |
---|
| 65 | !!---------------------------------------------------------------------- |
---|
| 66 | !! NEMO/ICE 4.0 , NEMO Consortium (2017) |
---|
| 67 | !! $Id: iceistate.F90 8378 2017-07-26 13:55:59Z clem $ |
---|
| 68 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
---|
| 69 | !!---------------------------------------------------------------------- |
---|
| 70 | CONTAINS |
---|
| 71 | |
---|
| 72 | SUBROUTINE ice_istate |
---|
| 73 | !!------------------------------------------------------------------- |
---|
| 74 | !! *** ROUTINE ice_istate *** |
---|
| 75 | !! |
---|
| 76 | !! ** Purpose : defined the sea-ice initial state |
---|
| 77 | !! |
---|
| 78 | !! ** Method : This routine will put some ice where ocean |
---|
| 79 | !! is at the freezing point, then fill in ice |
---|
| 80 | !! state variables using prescribed initial |
---|
| 81 | !! values in the namelist |
---|
| 82 | !! |
---|
[8534] | 83 | !! ** Steps : 1) Set initial surface and basal temperatures |
---|
| 84 | !! 2) Recompute or read sea ice state variables |
---|
[8514] | 85 | !! 3) Fill in the ice thickness distribution using gaussian |
---|
| 86 | !! 4) Fill in space-dependent arrays for state variables |
---|
[8534] | 87 | !! 5) snow-ice mass computation |
---|
| 88 | !! 6) store before fields |
---|
[8514] | 89 | !! |
---|
| 90 | !! ** Notes : o_i, t_su, t_s, t_i, s_i must be filled everywhere, even |
---|
| 91 | !! where there is no ice (clem: I do not know why, is it mandatory?) |
---|
| 92 | !!-------------------------------------------------------------------- |
---|
[8518] | 93 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
---|
| 94 | REAL(wp) :: ztmelts, zdh |
---|
| 95 | INTEGER :: i_hemis, i_fill, jl0 |
---|
| 96 | REAL(wp) :: zarg, zV, zconv, zdv |
---|
| 97 | INTEGER , DIMENSION(4) :: itest |
---|
| 98 | REAL(wp), DIMENSION(jpi,jpj) :: z2d |
---|
| 99 | REAL(wp), DIMENSION(jpi,jpj) :: zswitch ! ice indicator |
---|
| 100 | REAL(wp), DIMENSION(jpi,jpj) :: zht_i_ini, zat_i_ini, zvt_i_ini !data from namelist or nc file |
---|
| 101 | REAL(wp), DIMENSION(jpi,jpj) :: zts_u_ini, zht_s_ini, zsm_i_ini, ztm_i_ini !data from namelist or nc file |
---|
| 102 | REAL(wp), DIMENSION(jpi,jpj,jpl) :: zh_i_ini, za_i_ini !data by cattegories to fill |
---|
[8514] | 103 | !-------------------------------------------------------------------- |
---|
| 104 | |
---|
| 105 | IF(lwp) WRITE(numout,*) |
---|
[8515] | 106 | IF(lwp) WRITE(numout,*) 'ice_istate: sea-ice initialization ' |
---|
| 107 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~' |
---|
[8514] | 108 | |
---|
| 109 | !-------------------------------------------------------------------- |
---|
[8534] | 110 | ! 1) Set surface and bottom temperatures to initial values |
---|
[8514] | 111 | !-------------------------------------------------------------------- |
---|
| 112 | ! |
---|
| 113 | ! init surface temperature |
---|
| 114 | DO jl = 1, jpl |
---|
| 115 | t_su (:,:,jl) = rt0 * tmask(:,:,1) |
---|
| 116 | tn_ice(:,:,jl) = rt0 * tmask(:,:,1) |
---|
| 117 | END DO |
---|
| 118 | |
---|
| 119 | ! init basal temperature (considered at freezing point) |
---|
| 120 | CALL eos_fzp( sss_m(:,:), t_bo(:,:) ) |
---|
| 121 | t_bo(:,:) = ( t_bo(:,:) + rt0 ) * tmask(:,:,1) |
---|
| 122 | |
---|
| 123 | IF( ln_iceini ) THEN |
---|
[8534] | 124 | !----------------------------------------------------------- |
---|
| 125 | ! 2) Compute or read sea ice variables ===> single category |
---|
| 126 | !----------------------------------------------------------- |
---|
[8514] | 127 | ! |
---|
[8534] | 128 | ! !---------------! |
---|
| 129 | IF( ln_iceini_file )THEN ! Read a file ! |
---|
| 130 | ! !---------------! |
---|
| 131 | ! |
---|
[8514] | 132 | zht_i_ini(:,:) = si(jp_hti)%fnow(:,:,1) |
---|
| 133 | zht_s_ini(:,:) = si(jp_hts)%fnow(:,:,1) |
---|
| 134 | zat_i_ini(:,:) = si(jp_ati)%fnow(:,:,1) |
---|
| 135 | zts_u_ini(:,:) = si(jp_tsu)%fnow(:,:,1) |
---|
| 136 | ztm_i_ini(:,:) = si(jp_tmi)%fnow(:,:,1) |
---|
| 137 | zsm_i_ini(:,:) = si(jp_smi)%fnow(:,:,1) |
---|
| 138 | ! |
---|
| 139 | WHERE( zat_i_ini(:,:) > 0._wp ) ; zswitch(:,:) = tmask(:,:,1) |
---|
| 140 | ELSEWHERE ; zswitch(:,:) = 0._wp |
---|
| 141 | END WHERE |
---|
[8534] | 142 | zvt_i_ini(:,:) = zht_i_ini(:,:) * zat_i_ini(:,:) |
---|
[8514] | 143 | ! |
---|
[8534] | 144 | ! !---------------! |
---|
| 145 | ELSE ! Read namelist ! |
---|
| 146 | ! !---------------! |
---|
[8514] | 147 | |
---|
[8534] | 148 | ! no ice if sst <= t-freez + ttest |
---|
[8514] | 149 | WHERE( ( sst_m(:,:) - (t_bo(:,:) - rt0) ) * tmask(:,:,1) >= rn_thres_sst ) ; zswitch(:,:) = 0._wp |
---|
| 150 | ELSEWHERE ; zswitch(:,:) = tmask(:,:,1) |
---|
| 151 | END WHERE |
---|
| 152 | |
---|
| 153 | ! assign initial thickness, concentration, snow depth and salinity to an hemisphere-dependent array |
---|
[8515] | 154 | WHERE( ff_t(:,:) >= 0._wp ) |
---|
| 155 | zht_i_ini(:,:) = rn_hti_ini_n * zswitch(:,:) |
---|
| 156 | zht_s_ini(:,:) = rn_hts_ini_n * zswitch(:,:) |
---|
| 157 | zat_i_ini(:,:) = rn_ati_ini_n * zswitch(:,:) |
---|
| 158 | zts_u_ini(:,:) = rn_tmi_ini_n * zswitch(:,:) |
---|
| 159 | zsm_i_ini(:,:) = rn_smi_ini_n * zswitch(:,:) |
---|
| 160 | ztm_i_ini(:,:) = rn_tmi_ini_n * zswitch(:,:) |
---|
| 161 | ELSEWHERE |
---|
| 162 | zht_i_ini(:,:) = rn_hti_ini_s * zswitch(:,:) |
---|
| 163 | zht_s_ini(:,:) = rn_hts_ini_s * zswitch(:,:) |
---|
| 164 | zat_i_ini(:,:) = rn_ati_ini_s * zswitch(:,:) |
---|
| 165 | zts_u_ini(:,:) = rn_tmi_ini_s * zswitch(:,:) |
---|
| 166 | zsm_i_ini(:,:) = rn_smi_ini_s * zswitch(:,:) |
---|
| 167 | ztm_i_ini(:,:) = rn_tmi_ini_s * zswitch(:,:) |
---|
| 168 | END WHERE |
---|
[8534] | 169 | zvt_i_ini(:,:) = zht_i_ini(:,:) * zat_i_ini(:,:) |
---|
[8514] | 170 | ! |
---|
[8534] | 171 | ENDIF |
---|
[8514] | 172 | |
---|
[8534] | 173 | !------------------------------------------------------------------ |
---|
| 174 | ! 3) Distribute ice concentration and thickness into the categories |
---|
| 175 | !------------------------------------------------------------------ |
---|
[8514] | 176 | ! a gaussian distribution for ice concentration is used |
---|
| 177 | ! then we check whether the distribution fullfills |
---|
| 178 | ! volume and area conservation, positivity and ice categories bounds |
---|
| 179 | zh_i_ini(:,:,:) = 0._wp |
---|
| 180 | za_i_ini(:,:,:) = 0._wp |
---|
| 181 | ! |
---|
| 182 | DO jj = 1, jpj |
---|
| 183 | DO ji = 1, jpi |
---|
| 184 | ! |
---|
| 185 | IF( zat_i_ini(ji,jj) > 0._wp .AND. zht_i_ini(ji,jj) > 0._wp )THEN |
---|
| 186 | |
---|
[8534] | 187 | ! find which category (jl0) the input ice thickness falls into |
---|
[8514] | 188 | jl0 = jpl |
---|
| 189 | DO jl = 1, jpl |
---|
| 190 | IF ( ( zht_i_ini(ji,jj) > hi_max(jl-1) ) .AND. ( zht_i_ini(ji,jj) <= hi_max(jl) ) ) THEN |
---|
| 191 | jl0 = jl |
---|
| 192 | CYCLE |
---|
| 193 | ENDIF |
---|
| 194 | END DO |
---|
| 195 | ! |
---|
[8534] | 196 | itest(:) = 0 |
---|
| 197 | i_fill = jpl + 1 !------------------------------------ |
---|
| 198 | DO WHILE ( ( SUM( itest(:) ) /= 4 ) .AND. ( i_fill >= 2 ) ) ! iterative loop on i_fill categories |
---|
| 199 | ! !------------------------------------ |
---|
[8514] | 200 | i_fill = i_fill - 1 |
---|
[8534] | 201 | ! |
---|
[8514] | 202 | zh_i_ini(ji,jj,:) = 0._wp |
---|
| 203 | za_i_ini(ji,jj,:) = 0._wp |
---|
| 204 | itest(:) = 0 |
---|
| 205 | ! |
---|
[8534] | 206 | IF ( i_fill == 1 ) THEN !-- case very thin ice: fill only category 1 |
---|
[8514] | 207 | zh_i_ini(ji,jj,1) = zht_i_ini(ji,jj) |
---|
| 208 | za_i_ini(ji,jj,1) = zat_i_ini(ji,jj) |
---|
[8534] | 209 | ELSE !-- case ice is thicker: fill categories >1 |
---|
| 210 | ! thickness |
---|
[8514] | 211 | DO jl = 1, i_fill-1 |
---|
| 212 | zh_i_ini(ji,jj,jl) = hi_mean(jl) |
---|
| 213 | END DO |
---|
| 214 | ! |
---|
[8534] | 215 | ! concentration |
---|
[8514] | 216 | za_i_ini(ji,jj,jl0) = zat_i_ini(ji,jj) / SQRT(REAL(jpl)) |
---|
| 217 | DO jl = 1, i_fill - 1 |
---|
| 218 | IF( jl /= jl0 )THEN |
---|
| 219 | zarg = ( zh_i_ini(ji,jj,jl) - zht_i_ini(ji,jj) ) / ( 0.5_wp * zht_i_ini(ji,jj) ) |
---|
| 220 | za_i_ini(ji,jj,jl) = za_i_ini(ji,jj,jl0) * EXP(-zarg**2) |
---|
| 221 | ENDIF |
---|
| 222 | END DO |
---|
[8534] | 223 | |
---|
| 224 | ! last category |
---|
[8514] | 225 | za_i_ini(ji,jj,i_fill) = zat_i_ini(ji,jj) - SUM( za_i_ini(ji,jj,1:i_fill-1) ) |
---|
| 226 | zV = SUM( za_i_ini(ji,jj,1:i_fill-1) * zh_i_ini(ji,jj,1:i_fill-1) ) |
---|
| 227 | zh_i_ini(ji,jj,i_fill) = ( zvt_i_ini(ji,jj) - zV ) / MAX( za_i_ini(ji,jj,i_fill), epsi10 ) |
---|
| 228 | |
---|
| 229 | ! clem: correction if concentration of upper cat is greater than lower cat |
---|
| 230 | ! (it should be a gaussian around jl0 but sometimes it is not) |
---|
| 231 | IF ( jl0 /= jpl ) THEN |
---|
| 232 | DO jl = jpl, jl0+1, -1 |
---|
| 233 | IF ( za_i_ini(ji,jj,jl) > za_i_ini(ji,jj,jl-1) ) THEN |
---|
| 234 | zdv = zh_i_ini(ji,jj,jl) * za_i_ini(ji,jj,jl) |
---|
| 235 | zh_i_ini(ji,jj,jl ) = 0._wp |
---|
| 236 | za_i_ini(ji,jj,jl ) = 0._wp |
---|
| 237 | za_i_ini(ji,jj,1:jl-1) = za_i_ini(ji,jj,1:jl-1) & |
---|
| 238 | & + zdv / MAX( REAL(jl-1) * zht_i_ini(ji,jj), epsi10 ) |
---|
| 239 | END IF |
---|
| 240 | ENDDO |
---|
| 241 | ENDIF |
---|
| 242 | ! |
---|
[8534] | 243 | ENDIF |
---|
[8514] | 244 | |
---|
| 245 | ! Compatibility tests |
---|
[8534] | 246 | zconv = ABS( zat_i_ini(ji,jj) - SUM( za_i_ini(ji,jj,1:jpl) ) ) ! Test 1: area conservation |
---|
[8514] | 247 | IF ( zconv < epsi06 ) itest(1) = 1 |
---|
| 248 | |
---|
[8534] | 249 | zconv = ABS( zat_i_ini(ji,jj) * zht_i_ini(ji,jj) & ! Test 2: volume conservation |
---|
[8514] | 250 | & - SUM( za_i_ini (ji,jj,1:jpl) * zh_i_ini (ji,jj,1:jpl) ) ) |
---|
| 251 | IF ( zconv < epsi06 ) itest(2) = 1 |
---|
| 252 | |
---|
[8534] | 253 | IF ( zh_i_ini(ji,jj,i_fill) >= hi_max(i_fill-1) ) itest(3) = 1 ! Test 3: thickness of the last category is in-bounds ? |
---|
[8514] | 254 | |
---|
| 255 | itest(4) = 1 |
---|
| 256 | DO jl = 1, i_fill |
---|
[8534] | 257 | IF ( za_i_ini(ji,jj,jl) < 0._wp ) itest(4) = 0 ! Test 4: positivity of ice concentrations |
---|
[8514] | 258 | END DO |
---|
[8534] | 259 | ! !---------------------------- |
---|
| 260 | END DO ! end iteration on categories |
---|
| 261 | ! !---------------------------- |
---|
[8514] | 262 | ! |
---|
| 263 | IF( lwp .AND. SUM(itest) /= 4 ) THEN |
---|
| 264 | WRITE(numout,*) |
---|
| 265 | WRITE(numout,*) ' !!!! ALERT itest is not equal to 4 !!! ' |
---|
| 266 | WRITE(numout,*) ' !!!! Something is wrong in the LIM3 initialization procedure ' |
---|
| 267 | WRITE(numout,*) |
---|
| 268 | WRITE(numout,*) ' *** itest_i (i=1,4) = ', itest(:) |
---|
| 269 | WRITE(numout,*) ' zat_i_ini : ', zat_i_ini(ji,jj) |
---|
| 270 | WRITE(numout,*) ' zht_i_ini : ', zht_i_ini(ji,jj) |
---|
| 271 | ENDIF |
---|
| 272 | |
---|
[8534] | 273 | ENDIF |
---|
[8514] | 274 | ! |
---|
| 275 | END DO |
---|
| 276 | END DO |
---|
| 277 | |
---|
| 278 | !--------------------------------------------------------------------- |
---|
[8534] | 279 | ! 4) Fill in sea ice arrays |
---|
[8514] | 280 | !--------------------------------------------------------------------- |
---|
| 281 | |
---|
| 282 | ! Ice concentration, thickness and volume, ice salinity, ice age, surface temperature |
---|
| 283 | DO jl = 1, jpl ! loop over categories |
---|
| 284 | DO jj = 1, jpj |
---|
| 285 | DO ji = 1, jpi |
---|
| 286 | a_i(ji,jj,jl) = zswitch(ji,jj) * za_i_ini(ji,jj,jl) ! concentration |
---|
| 287 | ht_i(ji,jj,jl) = zswitch(ji,jj) * zh_i_ini(ji,jj,jl) ! ice thickness |
---|
| 288 | sm_i(ji,jj,jl) = zswitch(ji,jj) * zsm_i_ini(ji,jj) ! salinity |
---|
| 289 | o_i(ji,jj,jl) = 0._wp ! age (0 day) |
---|
| 290 | t_su(ji,jj,jl) = zswitch(ji,jj) * zts_u_ini(ji,jj) + ( 1._wp - zswitch(ji,jj) ) * rt0 ! surf temp |
---|
| 291 | |
---|
| 292 | IF( zht_i_ini(ji,jj) > 0._wp )THEN |
---|
| 293 | ht_s(ji,jj,jl)= ht_i(ji,jj,jl) * ( zht_s_ini(ji,jj) / zht_i_ini(ji,jj) ) ! snow depth |
---|
| 294 | ELSE |
---|
| 295 | ht_s(ji,jj,jl)= 0._wp |
---|
| 296 | ENDIF |
---|
| 297 | |
---|
| 298 | ! This case below should not be used if (ht_s/ht_i) is ok in namelist |
---|
| 299 | ! In case snow load is in excess that would lead to transformation from snow to ice |
---|
| 300 | ! Then, transfer the snow excess into the ice (different from icethd_dh) |
---|
| 301 | zdh = MAX( 0._wp, ( rhosn * ht_s(ji,jj,jl) + ( rhoic - rau0 ) * ht_i(ji,jj,jl) ) * r1_rau0 ) |
---|
| 302 | ! recompute ht_i, ht_s avoiding out of bounds values |
---|
| 303 | ht_i(ji,jj,jl) = MIN( hi_max(jl), ht_i(ji,jj,jl) + zdh ) |
---|
| 304 | ht_s(ji,jj,jl) = MAX( 0._wp, ht_s(ji,jj,jl) - zdh * rhoic * r1_rhosn ) |
---|
| 305 | |
---|
| 306 | ! ice volume, salt content, age content |
---|
| 307 | v_i(ji,jj,jl) = ht_i(ji,jj,jl) * a_i(ji,jj,jl) ! ice volume |
---|
| 308 | v_s(ji,jj,jl) = ht_s(ji,jj,jl) * a_i(ji,jj,jl) ! snow volume |
---|
| 309 | smv_i(ji,jj,jl) = MIN( sm_i(ji,jj,jl) , sss_m(ji,jj) ) * v_i(ji,jj,jl) ! salt content |
---|
| 310 | oa_i(ji,jj,jl) = o_i(ji,jj,jl) * a_i(ji,jj,jl) ! age content |
---|
| 311 | END DO |
---|
| 312 | END DO |
---|
| 313 | END DO |
---|
| 314 | |
---|
| 315 | ! for constant salinity in time |
---|
| 316 | IF( nn_icesal == 1 .OR. nn_icesal == 3 ) THEN |
---|
| 317 | CALL ice_var_salprof |
---|
| 318 | smv_i = sm_i * v_i |
---|
| 319 | ENDIF |
---|
| 320 | |
---|
| 321 | ! Snow temperature and heat content |
---|
| 322 | DO jk = 1, nlay_s |
---|
| 323 | DO jl = 1, jpl ! loop over categories |
---|
| 324 | DO jj = 1, jpj |
---|
| 325 | DO ji = 1, jpi |
---|
| 326 | t_s(ji,jj,jk,jl) = zswitch(ji,jj) * ztm_i_ini(ji,jj) + ( 1._wp - zswitch(ji,jj) ) * rt0 |
---|
| 327 | ! Snow energy of melting |
---|
| 328 | e_s(ji,jj,jk,jl) = zswitch(ji,jj) * rhosn * ( cpic * ( rt0 - t_s(ji,jj,jk,jl) ) + lfus ) |
---|
| 329 | |
---|
| 330 | ! Mutliply by volume, and divide by number of layers to get heat content in J/m2 |
---|
| 331 | e_s(ji,jj,jk,jl) = e_s(ji,jj,jk,jl) * v_s(ji,jj,jl) * r1_nlay_s |
---|
| 332 | END DO |
---|
| 333 | END DO |
---|
| 334 | END DO |
---|
| 335 | END DO |
---|
| 336 | |
---|
| 337 | ! Ice salinity, temperature and heat content |
---|
| 338 | DO jk = 1, nlay_i |
---|
| 339 | DO jl = 1, jpl ! loop over categories |
---|
| 340 | DO jj = 1, jpj |
---|
| 341 | DO ji = 1, jpi |
---|
| 342 | t_i(ji,jj,jk,jl) = zswitch(ji,jj) * ztm_i_ini(ji,jj) + ( 1._wp - zswitch(ji,jj) ) * rt0 |
---|
| 343 | s_i(ji,jj,jk,jl) = zswitch(ji,jj) * zsm_i_ini(ji,jj) + ( 1._wp - zswitch(ji,jj) ) * rn_simin |
---|
| 344 | ztmelts = - tmut * s_i(ji,jj,jk,jl) + rt0 !Melting temperature in K |
---|
| 345 | |
---|
| 346 | ! heat content per unit volume |
---|
| 347 | e_i(ji,jj,jk,jl) = zswitch(ji,jj) * rhoic * ( cpic * ( ztmelts - t_i(ji,jj,jk,jl) ) & |
---|
| 348 | + lfus * ( 1._wp - (ztmelts-rt0) / MIN((t_i(ji,jj,jk,jl)-rt0),-epsi20) ) & |
---|
| 349 | - rcp * ( ztmelts - rt0 ) ) |
---|
| 350 | |
---|
| 351 | ! Mutliply by ice volume, and divide by number of layers to get heat content in J/m2 |
---|
| 352 | e_i(ji,jj,jk,jl) = e_i(ji,jj,jk,jl) * v_i(ji,jj,jl) * r1_nlay_i |
---|
| 353 | END DO |
---|
| 354 | END DO |
---|
| 355 | END DO |
---|
| 356 | END DO |
---|
| 357 | |
---|
| 358 | tn_ice (:,:,:) = t_su (:,:,:) |
---|
| 359 | |
---|
| 360 | ! MV MP 2016 |
---|
| 361 | ! Melt pond volume and fraction |
---|
| 362 | IF ( ln_pnd ) THEN |
---|
| 363 | DO jl = 1, jpl |
---|
| 364 | a_ip_frac(:,:,jl) = 0.2 * zswitch(:,:) |
---|
| 365 | h_ip (:,:,jl) = 0.05 * zswitch(:,:) |
---|
| 366 | a_ip(:,:,jl) = a_ip_frac(:,:,jl) * a_i (:,:,jl) |
---|
| 367 | v_ip(:,:,jl) = h_ip (:,:,jl) * a_ip(:,:,jl) |
---|
| 368 | END DO |
---|
| 369 | ELSE |
---|
| 370 | a_ip(:,:,:) = 0._wp |
---|
| 371 | v_ip(:,:,:) = 0._wp |
---|
| 372 | a_ip_frac(:,:,:) = 0._wp |
---|
| 373 | h_ip (:,:,:) = 0._wp |
---|
| 374 | ENDIF |
---|
| 375 | ! END MV MP 2016 |
---|
| 376 | |
---|
| 377 | ELSE ! if ln_iceini=false |
---|
| 378 | a_i (:,:,:) = 0._wp |
---|
| 379 | v_i (:,:,:) = 0._wp |
---|
| 380 | v_s (:,:,:) = 0._wp |
---|
| 381 | smv_i(:,:,:) = 0._wp |
---|
| 382 | oa_i (:,:,:) = 0._wp |
---|
| 383 | ht_i (:,:,:) = 0._wp |
---|
| 384 | ht_s (:,:,:) = 0._wp |
---|
| 385 | sm_i (:,:,:) = 0._wp |
---|
| 386 | o_i (:,:,:) = 0._wp |
---|
| 387 | |
---|
| 388 | e_i(:,:,:,:) = 0._wp |
---|
| 389 | e_s(:,:,:,:) = 0._wp |
---|
| 390 | |
---|
| 391 | DO jl = 1, jpl |
---|
| 392 | DO jk = 1, nlay_i |
---|
| 393 | t_i(:,:,jk,jl) = rt0 * tmask(:,:,1) |
---|
| 394 | END DO |
---|
| 395 | DO jk = 1, nlay_s |
---|
| 396 | t_s(:,:,jk,jl) = rt0 * tmask(:,:,1) |
---|
| 397 | END DO |
---|
| 398 | END DO |
---|
| 399 | |
---|
| 400 | a_ip(:,:,:) = 0._wp |
---|
| 401 | v_ip(:,:,:) = 0._wp |
---|
| 402 | a_ip_frac(:,:,:) = 0._wp |
---|
| 403 | h_ip (:,:,:) = 0._wp |
---|
| 404 | |
---|
| 405 | ENDIF ! ln_iceini |
---|
| 406 | |
---|
| 407 | at_i (:,:) = 0.0_wp |
---|
| 408 | DO jl = 1, jpl |
---|
| 409 | at_i (:,:) = at_i (:,:) + a_i (:,:,jl) |
---|
| 410 | END DO |
---|
[8534] | 411 | ! |
---|
| 412 | ! --- set ice velocities --- ! |
---|
[8514] | 413 | u_ice (:,:) = 0._wp |
---|
| 414 | v_ice (:,:) = 0._wp |
---|
[8518] | 415 | ! |
---|
[8534] | 416 | !---------------------------------------------- |
---|
| 417 | ! 5) Snow-ice mass (case ice is fully embedded) |
---|
| 418 | !---------------------------------------------- |
---|
[8518] | 419 | snwice_mass (:,:) = tmask(:,:,1) * ( rhosn * vt_s(:,:) + rhoic * vt_i(:,:) ) ! snow+ice mass |
---|
| 420 | snwice_mass_b(:,:) = snwice_mass(:,:) |
---|
| 421 | ! |
---|
| 422 | IF( ln_ice_embd ) THEN ! embedded sea-ice: deplete the initial ssh below sea-ice area |
---|
[8514] | 423 | |
---|
[8518] | 424 | sshn(:,:) = sshn(:,:) - snwice_mass(:,:) * r1_rau0 |
---|
| 425 | sshb(:,:) = sshb(:,:) - snwice_mass(:,:) * r1_rau0 |
---|
[8514] | 426 | |
---|
[8518] | 427 | IF( .NOT.ln_linssh ) THEN |
---|
| 428 | |
---|
| 429 | WHERE( ht_0(:,:) > 0 ) ; z2d(:,:) = 1._wp + sshn(:,:)*tmask(:,:,1) / ht_0(:,:) |
---|
| 430 | ELSEWHERE ; z2d(:,:) = 1._wp ; END WHERE |
---|
| 431 | |
---|
| 432 | DO jk = 1,jpkm1 ! adjust initial vertical scale factors |
---|
| 433 | e3t_n(:,:,jk) = e3t_0(:,:,jk) * z2d(:,:) |
---|
| 434 | e3t_b(:,:,jk) = e3t_n(:,:,jk) |
---|
| 435 | e3t_a(:,:,jk) = e3t_n(:,:,jk) |
---|
| 436 | END DO |
---|
| 437 | |
---|
| 438 | ! Reconstruction of all vertical scale factors at now and before time-steps |
---|
| 439 | ! ========================================================================= |
---|
| 440 | ! Horizontal scale factor interpolations |
---|
| 441 | ! -------------------------------------- |
---|
| 442 | CALL dom_vvl_interpol( e3t_b(:,:,:), e3u_b(:,:,:), 'U' ) |
---|
| 443 | CALL dom_vvl_interpol( e3t_b(:,:,:), e3v_b(:,:,:), 'V' ) |
---|
| 444 | CALL dom_vvl_interpol( e3t_n(:,:,:), e3u_n(:,:,:), 'U' ) |
---|
| 445 | CALL dom_vvl_interpol( e3t_n(:,:,:), e3v_n(:,:,:), 'V' ) |
---|
| 446 | CALL dom_vvl_interpol( e3u_n(:,:,:), e3f_n(:,:,:), 'F' ) |
---|
| 447 | ! Vertical scale factor interpolations |
---|
| 448 | ! ------------------------------------ |
---|
| 449 | CALL dom_vvl_interpol( e3t_n(:,:,:), e3w_n (:,:,:), 'W' ) |
---|
| 450 | CALL dom_vvl_interpol( e3u_n(:,:,:), e3uw_n(:,:,:), 'UW' ) |
---|
| 451 | CALL dom_vvl_interpol( e3v_n(:,:,:), e3vw_n(:,:,:), 'VW' ) |
---|
| 452 | CALL dom_vvl_interpol( e3u_b(:,:,:), e3uw_b(:,:,:), 'UW' ) |
---|
| 453 | CALL dom_vvl_interpol( e3v_b(:,:,:), e3vw_b(:,:,:), 'VW' ) |
---|
| 454 | ! t- and w- points depth |
---|
| 455 | ! ---------------------- |
---|
| 456 | !!gm not sure of that.... |
---|
| 457 | gdept_n(:,:,1) = 0.5_wp * e3w_n(:,:,1) |
---|
| 458 | gdepw_n(:,:,1) = 0.0_wp |
---|
| 459 | gde3w_n(:,:,1) = gdept_n(:,:,1) - sshn(:,:) |
---|
| 460 | DO jk = 2, jpk |
---|
| 461 | gdept_n(:,:,jk) = gdept_n(:,:,jk-1) + e3w_n(:,:,jk ) |
---|
| 462 | gdepw_n(:,:,jk) = gdepw_n(:,:,jk-1) + e3t_n(:,:,jk-1) |
---|
| 463 | gde3w_n(:,:,jk) = gdept_n(:,:,jk ) - sshn (:,:) |
---|
| 464 | END DO |
---|
| 465 | ENDIF |
---|
| 466 | ENDIF |
---|
| 467 | |
---|
[8514] | 468 | !------------------------------------ |
---|
| 469 | ! 6) store fields at before time-step |
---|
| 470 | !------------------------------------ |
---|
| 471 | ! it is only necessary for the 1st interpolation by Agrif |
---|
| 472 | a_i_b (:,:,:) = a_i (:,:,:) |
---|
| 473 | e_i_b (:,:,:,:) = e_i (:,:,:,:) |
---|
| 474 | v_i_b (:,:,:) = v_i (:,:,:) |
---|
| 475 | v_s_b (:,:,:) = v_s (:,:,:) |
---|
| 476 | e_s_b (:,:,:,:) = e_s (:,:,:,:) |
---|
| 477 | smv_i_b(:,:,:) = smv_i(:,:,:) |
---|
| 478 | oa_i_b (:,:,:) = oa_i (:,:,:) |
---|
| 479 | u_ice_b(:,:) = u_ice(:,:) |
---|
| 480 | v_ice_b(:,:) = v_ice(:,:) |
---|
| 481 | |
---|
| 482 | !!!clem |
---|
| 483 | !! ! Output the initial state and forcings |
---|
| 484 | !! CALL dia_wri_state( 'output.init', nit000 ) |
---|
| 485 | !!! |
---|
| 486 | |
---|
| 487 | END SUBROUTINE ice_istate |
---|
| 488 | |
---|
| 489 | SUBROUTINE ice_istate_init |
---|
| 490 | !!------------------------------------------------------------------- |
---|
| 491 | !! *** ROUTINE ice_istate_init *** |
---|
| 492 | !! |
---|
| 493 | !! ** Purpose : Definition of initial state of the ice |
---|
| 494 | !! |
---|
[8531] | 495 | !! ** Method : Read the namini namelist and check the parameter |
---|
[8514] | 496 | !! values called at the first timestep (nit000) |
---|
| 497 | !! |
---|
| 498 | !! ** input : |
---|
[8531] | 499 | !! Namelist namini |
---|
[8514] | 500 | !! |
---|
| 501 | !! history : |
---|
| 502 | !! 8.5 ! 03-08 (C. Ethe) original code |
---|
| 503 | !! 8.5 ! 07-11 (M. Vancoppenolle) rewritten initialization |
---|
| 504 | !!----------------------------------------------------------------------------- |
---|
| 505 | ! |
---|
| 506 | INTEGER :: ios,ierr,inum_ice ! Local integer output status for namelist read |
---|
| 507 | INTEGER :: ji,jj |
---|
| 508 | INTEGER :: ifpr, ierror |
---|
| 509 | ! |
---|
| 510 | CHARACTER(len=256) :: cn_dir ! Root directory for location of ice files |
---|
| 511 | TYPE(FLD_N) :: sn_hti, sn_hts, sn_ati, sn_tsu, sn_tmi, sn_smi |
---|
| 512 | TYPE(FLD_N), DIMENSION(jpfldi) :: slf_i ! array of namelist informations on the fields to read |
---|
| 513 | ! |
---|
[8531] | 514 | NAMELIST/namini/ ln_iceini, ln_iceini_file, rn_thres_sst, rn_hts_ini_n, rn_hts_ini_s, & |
---|
| 515 | & rn_hti_ini_n, rn_hti_ini_s, rn_ati_ini_n, rn_ati_ini_s, rn_smi_ini_n, & |
---|
| 516 | & rn_smi_ini_s, rn_tmi_ini_n, rn_tmi_ini_s, & |
---|
| 517 | & sn_hti, sn_hts, sn_ati, sn_tsu, sn_tmi, sn_smi, cn_dir |
---|
[8514] | 518 | !!----------------------------------------------------------------------------- |
---|
| 519 | ! |
---|
[8531] | 520 | REWIND( numnam_ice_ref ) ! Namelist namini in reference namelist : Ice initial state |
---|
| 521 | READ ( numnam_ice_ref, namini, IOSTAT = ios, ERR = 901) |
---|
| 522 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namini in reference namelist', lwp ) |
---|
[8514] | 523 | |
---|
[8531] | 524 | REWIND( numnam_ice_cfg ) ! Namelist namini in configuration namelist : Ice initial state |
---|
| 525 | READ ( numnam_ice_cfg, namini, IOSTAT = ios, ERR = 902 ) |
---|
| 526 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namini in configuration namelist', lwp ) |
---|
| 527 | IF(lwm) WRITE ( numoni, namini ) |
---|
[8514] | 528 | |
---|
| 529 | slf_i(jp_hti) = sn_hti ; slf_i(jp_hts) = sn_hts |
---|
| 530 | slf_i(jp_ati) = sn_ati ; slf_i(jp_tsu) = sn_tsu |
---|
| 531 | slf_i(jp_tmi) = sn_tmi ; slf_i(jp_smi) = sn_smi |
---|
[8515] | 532 | ! |
---|
| 533 | ! |
---|
| 534 | IF(lwp) THEN ! control print |
---|
[8514] | 535 | WRITE(numout,*) |
---|
| 536 | WRITE(numout,*) 'ice_istate_init: ice parameters inititialisation ' |
---|
| 537 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
---|
[8531] | 538 | WRITE(numout,*) ' Namelist namini:' |
---|
[8534] | 539 | WRITE(numout,*) ' initialization with ice (T) or not (F) ln_iceini = ', ln_iceini |
---|
| 540 | WRITE(numout,*) ' ice initialization from a netcdf file ln_iceini_file = ', ln_iceini_file |
---|
| 541 | WRITE(numout,*) ' max delta ocean temp. above Tfreeze with initial ice rn_thres_sst = ', rn_thres_sst |
---|
| 542 | WRITE(numout,*) ' initial snow thickness in the north rn_hts_ini_n = ', rn_hts_ini_n |
---|
| 543 | WRITE(numout,*) ' initial snow thickness in the south rn_hts_ini_s = ', rn_hts_ini_s |
---|
| 544 | WRITE(numout,*) ' initial ice thickness in the north rn_hti_ini_n = ', rn_hti_ini_n |
---|
| 545 | WRITE(numout,*) ' initial ice thickness in the south rn_hti_ini_s = ', rn_hti_ini_s |
---|
| 546 | WRITE(numout,*) ' initial ice concentr. in the north rn_ati_ini_n = ', rn_ati_ini_n |
---|
| 547 | WRITE(numout,*) ' initial ice concentr. in the north rn_ati_ini_s = ', rn_ati_ini_s |
---|
| 548 | WRITE(numout,*) ' initial ice salinity in the north rn_smi_ini_n = ', rn_smi_ini_n |
---|
| 549 | WRITE(numout,*) ' initial ice salinity in the south rn_smi_ini_s = ', rn_smi_ini_s |
---|
| 550 | WRITE(numout,*) ' initial ice/snw temp in the north rn_tmi_ini_n = ', rn_tmi_ini_n |
---|
| 551 | WRITE(numout,*) ' initial ice/snw temp in the south rn_tmi_ini_s = ', rn_tmi_ini_s |
---|
[8514] | 552 | ENDIF |
---|
| 553 | |
---|
| 554 | IF( ln_iceini_file ) THEN ! Ice initialization using input file |
---|
| 555 | ! |
---|
| 556 | ! set si structure |
---|
| 557 | ALLOCATE( si(jpfldi), STAT=ierror ) |
---|
| 558 | IF( ierror > 0 ) THEN |
---|
| 559 | CALL ctl_stop( 'Ice_ini in iceistate: unable to allocate si structure' ) ; RETURN |
---|
| 560 | ENDIF |
---|
| 561 | |
---|
| 562 | DO ifpr = 1, jpfldi |
---|
| 563 | ALLOCATE( si(ifpr)%fnow(jpi,jpj,1) ) |
---|
| 564 | ALLOCATE( si(ifpr)%fdta(jpi,jpj,1,2) ) |
---|
| 565 | END DO |
---|
| 566 | |
---|
| 567 | ! fill si with slf_i and control print |
---|
| 568 | CALL fld_fill( si, slf_i, cn_dir, 'ice_istate', 'ice istate ini', 'numnam_ice' ) |
---|
| 569 | |
---|
| 570 | CALL fld_read( nit000, 1, si ) ! input fields provided at the current time-step |
---|
| 571 | |
---|
| 572 | ENDIF |
---|
| 573 | |
---|
| 574 | END SUBROUTINE ice_istate_init |
---|
| 575 | |
---|
| 576 | #else |
---|
| 577 | !!---------------------------------------------------------------------- |
---|
[8534] | 578 | !! Default option : Empty module NO ESIM sea-ice model |
---|
[8514] | 579 | !!---------------------------------------------------------------------- |
---|
| 580 | #endif |
---|
| 581 | |
---|
| 582 | !!====================================================================== |
---|
| 583 | END MODULE iceistate |
---|