[3] | 1 | MODULE limistate |
---|
| 2 | !!====================================================================== |
---|
| 3 | !! *** MODULE limistate *** |
---|
| 4 | !! Initialisation of diagnostics ice variables |
---|
| 5 | !!====================================================================== |
---|
[508] | 6 | !! History : 2.0 ! 01-04 (C. Ethe, G. Madec) Original code |
---|
| 7 | !! ! 04-04 (S. Theetten) initialization from a file |
---|
| 8 | !! ! 06-07 (S. Masson) IOM to read the restart |
---|
| 9 | !!-------------------------------------------------------------------- |
---|
[3] | 10 | #if defined key_ice_lim |
---|
| 11 | !!---------------------------------------------------------------------- |
---|
| 12 | !! 'key_ice_lim' : LIM sea-ice model |
---|
| 13 | !!---------------------------------------------------------------------- |
---|
[508] | 14 | !!---------------------------------------------------------------------- |
---|
[3] | 15 | !! lim_istate : Initialisation of diagnostics ice variables |
---|
| 16 | !! lim_istate_init : initialization of ice state and namelist read |
---|
| 17 | !!---------------------------------------------------------------------- |
---|
| 18 | USE phycst |
---|
| 19 | USE ocfzpt |
---|
[508] | 20 | USE oce ! dynamics and tracers variables !!gm used??? |
---|
| 21 | USE dom_oce !!gm used??? |
---|
[77] | 22 | USE par_ice ! ice parameters |
---|
[3] | 23 | USE ice_oce ! ice variables |
---|
| 24 | USE dom_ice |
---|
[508] | 25 | USE ice ! ??? |
---|
| 26 | USE lbclnk |
---|
[3] | 27 | USE ice |
---|
[508] | 28 | USE iom |
---|
| 29 | USE in_out_manager |
---|
[3] | 30 | |
---|
| 31 | IMPLICIT NONE |
---|
| 32 | PRIVATE |
---|
| 33 | |
---|
| 34 | PUBLIC lim_istate ! routine called by lim_init.F90 |
---|
| 35 | |
---|
[508] | 36 | REAL(wp) :: & !!! ** init namelist (namiceini) ** |
---|
[3] | 37 | ttest = 2.0 , & ! threshold water temperature for initial sea ice |
---|
| 38 | hninn = 0.5 , & ! initial snow thickness in the north |
---|
| 39 | hginn = 3.0 , & ! initial ice thickness in the north |
---|
| 40 | alinn = 0.05 , & ! initial leads area in the north |
---|
| 41 | hnins = 0.1 , & ! initial snow thickness in the south |
---|
| 42 | hgins = 1.0 , & ! initial ice thickness in the south |
---|
| 43 | alins = 0.1 ! initial leads area in the south |
---|
| 44 | |
---|
[77] | 45 | REAL(wp) :: & ! constant values |
---|
| 46 | zzero = 0.e0 , & |
---|
| 47 | zone = 1.e0 |
---|
[3] | 48 | !!---------------------------------------------------------------------- |
---|
[508] | 49 | !! LIM 2.0, UCL-LOCEAN-IPSL (2006) |
---|
[247] | 50 | !! $Header$ |
---|
[508] | 51 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
---|
[3] | 52 | !!---------------------------------------------------------------------- |
---|
| 53 | |
---|
| 54 | CONTAINS |
---|
| 55 | |
---|
| 56 | SUBROUTINE lim_istate |
---|
| 57 | !!------------------------------------------------------------------- |
---|
| 58 | !! *** ROUTINE lim_istate *** |
---|
| 59 | !! |
---|
[77] | 60 | !! ** Purpose : defined the sea-ice initial state |
---|
| 61 | !! |
---|
| 62 | !! ** Method : restart from a state defined in a binary file |
---|
| 63 | !! or from arbitrary sea-ice conditions |
---|
[3] | 64 | !!-------------------------------------------------------------------- |
---|
[508] | 65 | INTEGER :: ji, jj, jk ! dummy loop indices |
---|
| 66 | REAL(wp) :: zidto, zs0, ztf, zbin ! temporary scalar |
---|
| 67 | REAL(wp), DIMENSION(jpi,jpj) :: ztn ! workspace |
---|
[3] | 68 | !-------------------------------------------------------------------- |
---|
| 69 | |
---|
[508] | 70 | CALL lim_istate_init ! reading the initials parameters of the ice |
---|
[3] | 71 | |
---|
| 72 | !-- Initialisation of sst,sss,u,v do i=1,jpi |
---|
| 73 | u_io(:,:) = 0.e0 ! ice velocity in x direction |
---|
| 74 | v_io(:,:) = 0.e0 ! ice velocity in y direction |
---|
| 75 | |
---|
[419] | 76 | IF( ln_limini ) THEN ! |
---|
| 77 | |
---|
| 78 | ! Initialisation at tn if no ice or sst_ini if ice |
---|
| 79 | ! Idem for salinity |
---|
[3] | 80 | |
---|
[419] | 81 | !--- Criterion for presence (zidto=1.) or absence (zidto=0.) of ice |
---|
| 82 | DO jj = 1 , jpj |
---|
| 83 | DO ji = 1 , jpi |
---|
| 84 | |
---|
| 85 | zidto = MAX(zzero, - SIGN(1.,frld(ji,jj) - 1.)) |
---|
| 86 | |
---|
| 87 | sst_io(ji,jj) = ( nfice - 1 ) * (zidto * sst_ini(ji,jj) + & ! use the ocean initial values |
---|
| 88 | & (1.0 - zidto ) * ( tn(ji,jj,1) + rt0 )) ! tricky trick *(nfice-1) ! |
---|
| 89 | sss_io(ji,jj) = ( nfice - 1 ) * (zidto * sss_ini(ji,jj) + & |
---|
| 90 | & (1.0 - zidto ) * sn(ji,jj,1) ) |
---|
[3] | 91 | |
---|
[419] | 92 | ! to avoid the the melting of ice, several layers (mixed layer) should be |
---|
| 93 | ! set to sst_ini (sss_ini) if there is ice |
---|
| 94 | ! example for one layer |
---|
| 95 | ! tn(ji,jj,1) = zidto * ( sst_ini(ji,jj) - rt0 ) + (1.0 - zidto ) * tn(ji,jj,1) |
---|
| 96 | ! sn(ji,jj,1) = zidto * sss_ini(ji,jj) + (1.0 - zidto ) * sn(ji,jj,1) |
---|
| 97 | ! tb(ji,jj,1) = tn(ji,jj,1) |
---|
| 98 | ! sb(ji,jj,1) = sn(ji,jj,1) |
---|
| 99 | END DO |
---|
| 100 | END DO |
---|
| 101 | |
---|
| 102 | |
---|
| 103 | ! tfu: Melting point of sea water |
---|
| 104 | tfu(:,:) = ztf |
---|
| 105 | |
---|
| 106 | tfu(:,:) = ABS ( rt0 - 0.0575 * sss_ini(:,:) & |
---|
| 107 | & + 1.710523e-03 * sss_ini(:,:) * SQRT( sss_ini(:,:) ) & |
---|
| 108 | & - 2.154996e-04 * sss_ini(:,:) * sss_ini(:,:) ) |
---|
| 109 | ELSE ! |
---|
[3] | 110 | |
---|
[419] | 111 | |
---|
| 112 | ! Initialisation at tn or -2 if ice |
---|
| 113 | DO jj = 1, jpj |
---|
| 114 | DO ji = 1, jpi |
---|
| 115 | zbin = MAX( 0., SIGN( 1., fzptn(ji,jj) - tn(ji,jj,1) ) ) |
---|
| 116 | ztn(ji,jj) = ( (1.-zbin) * tn(ji,jj,1) - 2. * zbin + rt0 ) * tmask(ji,jj,1) |
---|
| 117 | END DO |
---|
[77] | 118 | END DO |
---|
[419] | 119 | |
---|
| 120 | u_io (:,:) = 0.e0 |
---|
| 121 | v_io (:,:) = 0.e0 |
---|
| 122 | sst_io(:,:) = ( nfice - 1 ) * ( tn(:,:,1) + rt0 ) ! use the ocean initial values |
---|
| 123 | sss_io(:,:) = ( nfice - 1 ) * sn(:,:,1) ! tricky trick *(nfice-1) ! |
---|
| 124 | |
---|
| 125 | ! reference salinity 34psu |
---|
| 126 | zs0 = 34.e0 |
---|
| 127 | ztf = ABS ( rt0 - 0.0575 * zs0 & |
---|
| 128 | & + 1.710523e-03 * zs0 * SQRT( zs0 ) & |
---|
| 129 | & - 2.154996e-04 * zs0 *zs0 ) |
---|
| 130 | |
---|
| 131 | ! tfu: Melting point of sea water |
---|
| 132 | tfu(:,:) = ztf |
---|
| 133 | |
---|
| 134 | DO jj = 1, jpj |
---|
| 135 | DO ji = 1, jpi |
---|
| 136 | !--- Criterion for presence (zidto=1) or absence (zidto=0) of ice |
---|
| 137 | zidto = tms(ji,jj) * ( 1.0 - MAX(zzero, SIGN( zone, ztn(ji,jj) - tfu(ji,jj) - ttest) ) ) |
---|
| 138 | |
---|
| 139 | IF( fcor(ji,jj) >= 0.e0 ) THEN !-- Northern hemisphere. |
---|
| 140 | hicif(ji,jj) = zidto * hginn |
---|
| 141 | frld(ji,jj) = zidto * alinn + ( 1.0 - zidto ) * 1.0 |
---|
| 142 | hsnif(ji,jj) = zidto * hninn |
---|
| 143 | ELSE !--- Southern hemisphere. |
---|
| 144 | hicif(ji,jj) = zidto * hgins |
---|
| 145 | frld(ji,jj) = zidto * alins + ( 1.0 - zidto ) * 1.0 |
---|
| 146 | hsnif(ji,jj) = zidto * hnins |
---|
| 147 | ENDIF |
---|
| 148 | END DO |
---|
| 149 | END DO |
---|
| 150 | |
---|
| 151 | sist (:,:) = tfu(:,:) |
---|
| 152 | tbif (:,:,1) = tfu(:,:) |
---|
| 153 | tbif (:,:,2) = tfu(:,:) |
---|
| 154 | tbif (:,:,3) = tfu(:,:) |
---|
| 155 | |
---|
| 156 | ENDIF |
---|
[3] | 157 | fsbbq (:,:) = 0.e0 |
---|
| 158 | qstoif(:,:) = 0.e0 |
---|
| 159 | u_ice (:,:) = 0.e0 |
---|
| 160 | v_ice (:,:) = 0.e0 |
---|
| 161 | # if defined key_coupled |
---|
| 162 | albege(:,:) = 0.8 * tms(:,:) |
---|
| 163 | # endif |
---|
| 164 | |
---|
[77] | 165 | !--- Moments for advection. |
---|
[3] | 166 | |
---|
[77] | 167 | sxice (:,:) = 0.e0 ; sxsn (:,:) = 0.e0 ; sxa (:,:) = 0.e0 |
---|
| 168 | syice (:,:) = 0.e0 ; sysn (:,:) = 0.e0 ; sya (:,:) = 0.e0 |
---|
| 169 | sxxice(:,:) = 0.e0 ; sxxsn(:,:) = 0.e0 ; sxxa (:,:) = 0.e0 |
---|
| 170 | syyice(:,:) = 0.e0 ; syysn(:,:) = 0.e0 ; syya (:,:) = 0.e0 |
---|
| 171 | sxyice(:,:) = 0.e0 ; sxysn(:,:) = 0.e0 ; sxya (:,:) = 0.e0 |
---|
[3] | 172 | |
---|
[77] | 173 | sxc0 (:,:) = 0.e0 ; sxc1 (:,:) = 0.e0 ; sxc2 (:,:) = 0.e0 |
---|
| 174 | syc0 (:,:) = 0.e0 ; syc1 (:,:) = 0.e0 ; syc2 (:,:) = 0.e0 |
---|
| 175 | sxxc0 (:,:) = 0.e0 ; sxxc1(:,:) = 0.e0 ; sxxc2(:,:) = 0.e0 |
---|
| 176 | syyc0 (:,:) = 0.e0 ; syyc1(:,:) = 0.e0 ; syyc2(:,:) = 0.e0 |
---|
| 177 | sxyc0 (:,:) = 0.e0 ; sxyc1(:,:) = 0.e0 ; sxyc2(:,:) = 0.e0 |
---|
[3] | 178 | |
---|
[77] | 179 | sxst (:,:) = 0.e0 |
---|
| 180 | syst (:,:) = 0.e0 |
---|
| 181 | sxxst (:,:) = 0.e0 |
---|
| 182 | syyst (:,:) = 0.e0 |
---|
| 183 | sxyst (:,:) = 0.e0 |
---|
[3] | 184 | |
---|
[77] | 185 | !-- lateral boundary conditions |
---|
| 186 | CALL lbc_lnk( hicif, 'T', 1. ) |
---|
| 187 | CALL lbc_lnk( frld , 'T', 1. ) |
---|
[299] | 188 | |
---|
| 189 | ! C A U T I O N frld = 1 over land and lbc_lnk put zero along |
---|
| 190 | ! ************* closed boundaries herefore we force to one over land |
---|
| 191 | frld(:,:) = tms(:,:) * frld(:,:) + ( 1. - tms(:,:) ) |
---|
| 192 | |
---|
[77] | 193 | CALL lbc_lnk( hsnif, 'T', 1. ) |
---|
| 194 | CALL lbc_lnk( sist , 'T', 1. ) |
---|
| 195 | DO jk = 1, jplayersp1 |
---|
| 196 | CALL lbc_lnk(tbif(:,:,jk), 'T', 1. ) |
---|
| 197 | END DO |
---|
| 198 | CALL lbc_lnk( fsbbq , 'T', 1. ) |
---|
| 199 | CALL lbc_lnk( qstoif , 'T', 1. ) |
---|
| 200 | CALL lbc_lnk( sss_io , 'T', 1. ) |
---|
[508] | 201 | ! |
---|
[3] | 202 | END SUBROUTINE lim_istate |
---|
| 203 | |
---|
| 204 | |
---|
| 205 | SUBROUTINE lim_istate_init |
---|
| 206 | !!------------------------------------------------------------------- |
---|
| 207 | !! *** ROUTINE lim_istate_init *** |
---|
| 208 | !! |
---|
[77] | 209 | !! ** Purpose : Definition of initial state of the ice |
---|
[3] | 210 | !! |
---|
[77] | 211 | !! ** Method : Read the namiceini namelist and check the parameter |
---|
[419] | 212 | !! values called at the first timestep (nit000) |
---|
| 213 | !! or |
---|
| 214 | !! Read 7 variables from a previous restart file |
---|
| 215 | !! sst, sst, hicif, hsnif, frld, ts & tbif |
---|
[3] | 216 | !! |
---|
[77] | 217 | !! ** input : Namelist namiceini |
---|
[3] | 218 | !!------------------------------------------------------------------- |
---|
[508] | 219 | INTEGER :: inum_ice |
---|
[419] | 220 | |
---|
| 221 | NAMELIST/namiceini/ ln_limini, ln_limdmp, ttest, hninn, hginn, alinn, & |
---|
| 222 | & hnins, hgins, alins |
---|
[3] | 223 | !!------------------------------------------------------------------- |
---|
[419] | 224 | |
---|
[77] | 225 | ! Read Namelist namiceini |
---|
[3] | 226 | REWIND ( numnam_ice ) |
---|
| 227 | READ ( numnam_ice , namiceini ) |
---|
[419] | 228 | |
---|
| 229 | IF(.NOT. ln_limini) THEN |
---|
| 230 | IF(lwp) THEN |
---|
| 231 | WRITE(numout,*) |
---|
| 232 | WRITE(numout,*) 'lim_istate_init : ice parameters inititialisation ' |
---|
| 233 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
---|
| 234 | WRITE(numout,*) ' threshold water temp. for initial sea-ice ttest = ', ttest |
---|
| 235 | WRITE(numout,*) ' initial snow thickness in the north hninn = ', hninn |
---|
| 236 | WRITE(numout,*) ' initial ice thickness in the north hginn = ', hginn |
---|
| 237 | WRITE(numout,*) ' initial leads area in the north alinn = ', alinn |
---|
| 238 | WRITE(numout,*) ' initial snow thickness in the south hnins = ', hnins |
---|
| 239 | WRITE(numout,*) ' initial ice thickness in the south hgins = ', hgins |
---|
| 240 | WRITE(numout,*) ' initial leads area in the south alins = ', alins |
---|
| 241 | ENDIF |
---|
[3] | 242 | ENDIF |
---|
[419] | 243 | |
---|
| 244 | IF( ln_limini ) THEN ! Ice initialization using input file |
---|
| 245 | |
---|
[508] | 246 | CALL iom_open( 'Ice_initialization.nc', inum_ice ) |
---|
| 247 | |
---|
| 248 | IF( inum_ice > 0 ) THEN |
---|
[419] | 249 | IF(lwp) THEN |
---|
| 250 | WRITE(numout,*) ' ' |
---|
[508] | 251 | WRITE(numout,*) 'lim_istate_init : ice state initialization with : Ice_initialization.nc' |
---|
[419] | 252 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
---|
| 253 | WRITE(numout,*) ' Ice state initialization using input file ln_limini = ', ln_limini |
---|
| 254 | WRITE(numout,*) ' Ice damping ln_limdmp = ', ln_limdmp |
---|
| 255 | WRITE(numout,*) ' ' |
---|
| 256 | ENDIF |
---|
[3] | 257 | |
---|
[508] | 258 | CALL iom_get( inum_ice, jpdom_data, 'sst' , sst_ini(:,:) ) |
---|
| 259 | CALL iom_get( inum_ice, jpdom_data, 'sss' , sss_ini(:,:) ) |
---|
| 260 | CALL iom_get( inum_ice, jpdom_data, 'hicif', hicif (:,:) ) |
---|
| 261 | CALL iom_get( inum_ice, jpdom_data, 'hsnif', hsnif (:,:) ) |
---|
| 262 | CALL iom_get( inum_ice, jpdom_data, 'frld' , frld (:,:) ) |
---|
| 263 | CALL iom_get( inum_ice, jpdom_data, 'ts' , sist (:,:) ) |
---|
| 264 | CALL iom_get( inum_ice, jpdom_unknown, 'tbif', tbif(:,:,:), & |
---|
| 265 | & kstart = (/ mig(1),mjg(1),1 /), kcount = (/ nlci,nlcj,jplayersp1 /) ) |
---|
| 266 | |
---|
| 267 | CALL iom_close( inum_ice) |
---|
[419] | 268 | |
---|
| 269 | ENDIF |
---|
| 270 | ENDIF |
---|
[508] | 271 | ! |
---|
[3] | 272 | END SUBROUTINE lim_istate_init |
---|
| 273 | |
---|
| 274 | #else |
---|
| 275 | !!---------------------------------------------------------------------- |
---|
| 276 | !! Default option : Empty module NO LIM sea-ice model |
---|
| 277 | !!---------------------------------------------------------------------- |
---|
| 278 | CONTAINS |
---|
| 279 | SUBROUTINE lim_istate ! Empty routine |
---|
| 280 | END SUBROUTINE lim_istate |
---|
| 281 | #endif |
---|
| 282 | |
---|
| 283 | !!====================================================================== |
---|
| 284 | END MODULE limistate |
---|