[821] | 1 | MODULE limmsh_2 |
---|
[3] | 2 | !!====================================================================== |
---|
[821] | 3 | !! *** MODULE limmsh_2 *** |
---|
| 4 | !! LIM 2.0 ice model : definition of the ice mesh parameters |
---|
[3] | 5 | !!====================================================================== |
---|
[2528] | 6 | !! History : - ! 2001-04 (LIM) original code |
---|
| 7 | !! 1.0 ! 2002-08 (C. Ethe, G. Madec) F90, module |
---|
| 8 | !! 3.3 ! 2009-05 (G. Garric, C. Bricaud) addition of the lim2_evp case |
---|
| 9 | !!---------------------------------------------------------------------- |
---|
[821] | 10 | #if defined key_lim2 |
---|
[3] | 11 | !!---------------------------------------------------------------------- |
---|
[821] | 12 | !! 'key_lim2' LIM 2.0sea-ice model |
---|
[58] | 13 | !!---------------------------------------------------------------------- |
---|
[821] | 14 | !! lim_msh_2 : definition of the ice mesh |
---|
[3] | 15 | !!---------------------------------------------------------------------- |
---|
| 16 | USE phycst |
---|
| 17 | USE dom_oce |
---|
[821] | 18 | USE dom_ice_2 |
---|
[3] | 19 | USE lbclnk |
---|
[58] | 20 | USE in_out_manager |
---|
[2715] | 21 | USE lib_mpp ! MPP library |
---|
[3294] | 22 | #if defined key_lim2_vp |
---|
| 23 | USE wrk_nemo ! work arrays |
---|
| 24 | #endif |
---|
[3625] | 25 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
---|
[3] | 26 | |
---|
| 27 | IMPLICIT NONE |
---|
| 28 | PRIVATE |
---|
| 29 | |
---|
[821] | 30 | PUBLIC lim_msh_2 ! routine called by ice_ini_2.F90 |
---|
[3] | 31 | |
---|
| 32 | !!---------------------------------------------------------------------- |
---|
[2528] | 33 | !! NEMO/LIM2 3.3 , UCL - NEMO Consortium (2010) |
---|
[1156] | 34 | !! $Id$ |
---|
[2528] | 35 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
---|
[3] | 36 | !!---------------------------------------------------------------------- |
---|
| 37 | CONTAINS |
---|
| 38 | |
---|
[821] | 39 | SUBROUTINE lim_msh_2 |
---|
[3] | 40 | !!------------------------------------------------------------------- |
---|
[821] | 41 | !! *** ROUTINE lim_msh_2 *** |
---|
[3] | 42 | !! |
---|
| 43 | !! ** Purpose : Definition of the charact. of the numerical grid |
---|
| 44 | !! |
---|
| 45 | !! ** Action : - Initialisation of some variables |
---|
| 46 | !! - Definition of some constants linked with the grid |
---|
| 47 | !! - Definition of the metric coef. for the sea/ice |
---|
| 48 | !! - Initialization of the ice masks (tmsk, umsk) |
---|
| 49 | !! |
---|
| 50 | !! ** Refer. : Deleersnijder et al. Ocean Modelling 100, 7-10 |
---|
| 51 | !!--------------------------------------------------------------------- |
---|
[12] | 52 | INTEGER :: ji, jj ! dummy loop indices |
---|
[2528] | 53 | REAL(wp) :: zusden ! local scalars |
---|
| 54 | #if defined key_lim2_vp |
---|
| 55 | REAL(wp) :: zusden2 ! local scalars |
---|
| 56 | REAL(wp) :: zh1p , zh2p ! - - |
---|
| 57 | REAL(wp) :: zd2d1p, zd1d2p ! - - |
---|
[3294] | 58 | REAL(wp), POINTER, DIMENSION(:,:) :: zd2d1, zd1d2 ! 2D workspace |
---|
[2528] | 59 | #endif |
---|
[3] | 60 | !!--------------------------------------------------------------------- |
---|
[58] | 61 | |
---|
[3294] | 62 | #if defined key_lim2_vp |
---|
| 63 | CALL wrk_alloc( jpi, jpj, zd2d1, zd1d2 ) |
---|
| 64 | #endif |
---|
[2715] | 65 | |
---|
[58] | 66 | IF(lwp) THEN |
---|
| 67 | WRITE(numout,*) |
---|
[821] | 68 | WRITE(numout,*) 'lim_msh_2 : LIM 2.0 sea-ice model, mesh initialization' |
---|
| 69 | WRITE(numout,*) '~~~~~~~~~' |
---|
[58] | 70 | ENDIF |
---|
[3] | 71 | |
---|
[1923] | 72 | IF( jphgr_msh == 2 .OR. jphgr_msh == 3 .OR. jphgr_msh == 5 ) & |
---|
| 73 | & CALL ctl_stop(' Coriolis parameter in LIM not set for f- or beta-plane' ) |
---|
| 74 | |
---|
[3] | 75 | !---------------------------------------------------------- |
---|
| 76 | ! Initialization of local and some global (common) variables |
---|
| 77 | !------------------------------------------------------------------ |
---|
| 78 | |
---|
[58] | 79 | njeq = INT( jpj / 2 ) !i bug mpp potentiel |
---|
| 80 | njeqm1 = njeq - 1 |
---|
[3] | 81 | |
---|
[2528] | 82 | fcor(:,:) = 2. * omega * SIN( gphit(:,:) * rad ) ! coriolis factor at T-point |
---|
[3] | 83 | |
---|
[58] | 84 | !i DO jj = 1, jpj |
---|
| 85 | !i zmsk(jj) = SUM( tmask(:,jj,:) ) ! = 0 if land everywhere on a j-line |
---|
| 86 | !!ii write(numout,*) jj, zind(jj) |
---|
| 87 | !i END DO |
---|
[3] | 88 | |
---|
[58] | 89 | IF( fcor(1,1) * fcor(1,nlcj) < 0.e0 ) THEN ! local domain include both hemisphere |
---|
| 90 | l_jeq = .TRUE. |
---|
| 91 | njeq = 1 |
---|
| 92 | DO WHILE ( njeq <= jpj .AND. fcor(1,njeq) < 0.e0 ) |
---|
| 93 | njeq = njeq + 1 |
---|
| 94 | END DO |
---|
| 95 | IF(lwp ) WRITE(numout,*) ' the equator is inside the domain at about njeq = ', njeq |
---|
| 96 | ELSEIF( fcor(1,1) < 0.e0 ) THEN |
---|
| 97 | l_jeq = .FALSE. |
---|
[192] | 98 | njeq = jpj |
---|
[58] | 99 | IF(lwp ) WRITE(numout,*) ' the model domain is entirely in the southern hemisphere: njeq = ', njeq |
---|
| 100 | ELSE |
---|
| 101 | l_jeq = .FALSE. |
---|
[192] | 102 | njeq = 2 |
---|
[58] | 103 | IF(lwp ) WRITE(numout,*) ' the model domain is entirely in the northern hemisphere: njeq = ', njeq |
---|
| 104 | ENDIF |
---|
| 105 | |
---|
| 106 | njeqm1 = njeq - 1 |
---|
| 107 | |
---|
| 108 | |
---|
[3] | 109 | ! For each grid, definition of geometric tables |
---|
| 110 | !------------------------------------------------------------------ |
---|
| 111 | |
---|
| 112 | !------------------- |
---|
[58] | 113 | ! Conventions : ! |
---|
[3] | 114 | !------------------- |
---|
| 115 | ! indices 1 \ 2 <-> localisation in the 2 direction x \ y |
---|
| 116 | ! 3rd indice <-> localisation on the mesh : |
---|
| 117 | ! 0 = Centre ; 1 = corner W x(i-1/2) ; 2 = corner S y(j-1/2) ; |
---|
| 118 | ! 3 = corner SW x(i-1/2),y(j-1/2) |
---|
| 119 | !------------------- |
---|
[58] | 120 | !!ibug ??? |
---|
| 121 | wght(:,:,:,:) = 0.e0 |
---|
[2528] | 122 | tmu(:,:) = 0.e0 |
---|
| 123 | #if defined key_lim2_vp |
---|
| 124 | akappa(:,:,:,:) = 0.e0 |
---|
[58] | 125 | alambd(:,:,:,:,:,:) = 0.e0 |
---|
[2528] | 126 | #else |
---|
| 127 | tmv(:,:) = 0.e0 |
---|
| 128 | tmf(:,:) = 0.e0 |
---|
| 129 | #endif |
---|
[58] | 130 | !!i |
---|
[3] | 131 | |
---|
[2528] | 132 | |
---|
| 133 | #if defined key_lim2_vp |
---|
[3] | 134 | ! metric coefficients for sea ice dynamic |
---|
| 135 | !---------------------------------------- |
---|
| 136 | ! ! akappa |
---|
[12] | 137 | DO jj = 2, jpj |
---|
[58] | 138 | zd1d2(:,jj) = e1v(:,jj) - e1v(:,jj-1) |
---|
[3] | 139 | END DO |
---|
[12] | 140 | CALL lbc_lnk( zd1d2, 'T', -1. ) |
---|
[3] | 141 | |
---|
[58] | 142 | DO ji = 2, jpi |
---|
| 143 | zd2d1(ji,:) = e2u(ji,:) - e2u(ji-1,:) |
---|
[3] | 144 | END DO |
---|
[12] | 145 | CALL lbc_lnk( zd2d1, 'T', -1. ) |
---|
[3] | 146 | |
---|
[58] | 147 | akappa(:,:,1,1) = 1.0 / ( 2.0 * e1t(:,:) ) |
---|
| 148 | akappa(:,:,1,2) = zd1d2(:,:) / ( 4.0 * e1t(:,:) * e2t(:,:) ) |
---|
| 149 | akappa(:,:,2,1) = zd2d1(:,:) / ( 4.0 * e1t(:,:) * e2t(:,:) ) |
---|
| 150 | akappa(:,:,2,2) = 1.0 / ( 2.0 * e2t(:,:) ) |
---|
[3] | 151 | |
---|
| 152 | ! ! weights (wght) |
---|
[12] | 153 | DO jj = 2, jpj |
---|
| 154 | DO ji = 2, jpi |
---|
[3] | 155 | zusden = 1. / ( ( e1t(ji,jj) + e1t(ji-1,jj ) ) & |
---|
| 156 | & * ( e2t(ji,jj) + e2t(ji ,jj-1) ) ) |
---|
| 157 | wght(ji,jj,1,1) = zusden * e1t(ji ,jj) * e2t(ji,jj ) |
---|
| 158 | wght(ji,jj,1,2) = zusden * e1t(ji ,jj) * e2t(ji,jj-1) |
---|
| 159 | wght(ji,jj,2,1) = zusden * e1t(ji-1,jj) * e2t(ji,jj ) |
---|
| 160 | wght(ji,jj,2,2) = zusden * e1t(ji-1,jj) * e2t(ji,jj-1) |
---|
| 161 | END DO |
---|
| 162 | END DO |
---|
| 163 | CALL lbc_lnk( wght(:,:,1,1), 'I', 1. ) ! CAUTION: even with the lbc_lnk at ice U-V-point |
---|
| 164 | CALL lbc_lnk( wght(:,:,1,2), 'I', 1. ) ! the value of wght at jpj is wrong |
---|
| 165 | CALL lbc_lnk( wght(:,:,2,1), 'I', 1. ) ! but it is never used |
---|
| 166 | CALL lbc_lnk( wght(:,:,2,2), 'I', 1. ) |
---|
[2528] | 167 | #else |
---|
| 168 | ! metric coefficients for sea ice dynamic (EVP rheology) |
---|
| 169 | !---------------------------------------- |
---|
| 170 | DO jj = 1, jpjm1 ! weights (wght) at F-points |
---|
| 171 | DO ji = 1, jpim1 |
---|
| 172 | zusden = 1. / ( ( e1t(ji+1,jj ) + e1t(ji,jj) ) & |
---|
| 173 | & * ( e2t(ji ,jj+1) + e2t(ji,jj) ) ) |
---|
| 174 | wght(ji,jj,1,1) = zusden * e1t(ji+1,jj) * e2t(ji,jj+1) |
---|
| 175 | wght(ji,jj,1,2) = zusden * e1t(ji+1,jj) * e2t(ji,jj ) |
---|
| 176 | wght(ji,jj,2,1) = zusden * e1t(ji ,jj) * e2t(ji,jj+1) |
---|
| 177 | wght(ji,jj,2,2) = zusden * e1t(ji ,jj) * e2t(ji,jj ) |
---|
| 178 | END DO |
---|
| 179 | END DO |
---|
| 180 | CALL lbc_lnk( wght(:,:,1,1), 'F', 1. ) ; CALL lbc_lnk( wght(:,:,1,2),'F', 1. ) ! lateral boundary cond. |
---|
| 181 | CALL lbc_lnk( wght(:,:,2,1), 'F', 1. ) ; CALL lbc_lnk( wght(:,:,2,2),'F', 1. ) |
---|
| 182 | #endif |
---|
[3] | 183 | |
---|
| 184 | ! Coefficients for divergence of the stress tensor |
---|
| 185 | !------------------------------------------------- |
---|
| 186 | |
---|
[2528] | 187 | #if defined key_lim2_vp |
---|
[12] | 188 | DO jj = 2, jpj |
---|
[1694] | 189 | DO ji = 2, jpi ! NO vector opt. |
---|
[3] | 190 | zh1p = e1t(ji ,jj ) * wght(ji,jj,2,2) & |
---|
| 191 | & + e1t(ji-1,jj ) * wght(ji,jj,1,2) & |
---|
| 192 | & + e1t(ji ,jj-1) * wght(ji,jj,2,1) & |
---|
| 193 | & + e1t(ji-1,jj-1) * wght(ji,jj,1,1) |
---|
| 194 | |
---|
| 195 | zh2p = e2t(ji ,jj ) * wght(ji,jj,2,2) & |
---|
| 196 | & + e2t(ji-1,jj ) * wght(ji,jj,1,2) & |
---|
| 197 | & + e2t(ji ,jj-1) * wght(ji,jj,2,1) & |
---|
| 198 | & + e2t(ji-1,jj-1) * wght(ji,jj,1,1) |
---|
| 199 | |
---|
[58] | 200 | ! better written but change the last digit and thus solver in less than 100 timestep |
---|
[3] | 201 | ! zh1p = e1t(ji-1,jj ) * wght(ji,jj,1,2) + e1t(ji,jj ) * wght(ji,jj,2,2) & |
---|
| 202 | ! & + e1t(ji-1,jj-1) * wght(ji,jj,1,1) + e1t(ji,jj-1) * wght(ji,jj,2,1) |
---|
| 203 | |
---|
| 204 | ! zh2p = e2t(ji-1,jj ) * wght(ji,jj,1,2) + e2t(ji,jj ) * wght(ji,jj,2,2) & |
---|
| 205 | ! & + e2t(ji-1,jj-1) * wght(ji,jj,1,1) + e2t(ji,jj-1) * wght(ji,jj,2,1) |
---|
| 206 | |
---|
[58] | 207 | !!ibug =0 zusden = 1.0 / ( zh1p * zh2p * 4.e0 ) |
---|
| 208 | zusden = 1.0 / MAX( zh1p * zh2p * 4.e0 , 1.e-20 ) |
---|
[3] | 209 | zusden2 = zusden * 2.0 |
---|
| 210 | |
---|
| 211 | zd1d2p = zusden * 0.5 * ( -e1t(ji-1,jj-1) + e1t(ji-1,jj ) - e1t(ji,jj-1) + e1t(ji ,jj) ) |
---|
| 212 | zd2d1p = zusden * 0.5 * ( e2t(ji ,jj-1) - e2t(ji-1,jj-1) + e2t(ji,jj ) - e2t(ji-1,jj) ) |
---|
| 213 | |
---|
| 214 | alambd(ji,jj,2,2,2,1) = zusden2 * e2t(ji ,jj-1) |
---|
| 215 | alambd(ji,jj,2,2,2,2) = zusden2 * e2t(ji ,jj ) |
---|
| 216 | alambd(ji,jj,2,2,1,1) = zusden2 * e2t(ji-1,jj-1) |
---|
| 217 | alambd(ji,jj,2,2,1,2) = zusden2 * e2t(ji-1,jj ) |
---|
| 218 | |
---|
| 219 | alambd(ji,jj,1,1,2,1) = zusden2 * e1t(ji ,jj-1) |
---|
| 220 | alambd(ji,jj,1,1,2,2) = zusden2 * e1t(ji ,jj ) |
---|
| 221 | alambd(ji,jj,1,1,1,1) = zusden2 * e1t(ji-1,jj-1) |
---|
| 222 | alambd(ji,jj,1,1,1,2) = zusden2 * e1t(ji-1,jj ) |
---|
| 223 | |
---|
| 224 | alambd(ji,jj,1,2,2,1) = zd1d2p |
---|
| 225 | alambd(ji,jj,1,2,2,2) = zd1d2p |
---|
| 226 | alambd(ji,jj,1,2,1,1) = zd1d2p |
---|
| 227 | alambd(ji,jj,1,2,1,2) = zd1d2p |
---|
| 228 | |
---|
| 229 | alambd(ji,jj,2,1,2,1) = zd2d1p |
---|
| 230 | alambd(ji,jj,2,1,2,2) = zd2d1p |
---|
| 231 | alambd(ji,jj,2,1,1,1) = zd2d1p |
---|
| 232 | alambd(ji,jj,2,1,1,2) = zd2d1p |
---|
| 233 | END DO |
---|
| 234 | END DO |
---|
| 235 | |
---|
| 236 | CALL lbc_lnk( alambd(:,:,2,2,2,1), 'I', 1. ) ! CAUTION: even with the lbc_lnk at ice U-V point |
---|
| 237 | CALL lbc_lnk( alambd(:,:,2,2,2,2), 'I', 1. ) ! the value of wght at jpj is wrong |
---|
| 238 | CALL lbc_lnk( alambd(:,:,2,2,1,1), 'I', 1. ) ! but it is never used |
---|
| 239 | CALL lbc_lnk( alambd(:,:,2,2,1,2), 'I', 1. ) ! |
---|
| 240 | |
---|
| 241 | CALL lbc_lnk( alambd(:,:,1,1,2,1), 'I', 1. ) ! CAUTION: idem |
---|
| 242 | CALL lbc_lnk( alambd(:,:,1,1,2,2), 'I', 1. ) ! |
---|
| 243 | CALL lbc_lnk( alambd(:,:,1,1,1,1), 'I', 1. ) ! |
---|
| 244 | CALL lbc_lnk( alambd(:,:,1,1,1,2), 'I', 1. ) ! |
---|
| 245 | |
---|
| 246 | CALL lbc_lnk( alambd(:,:,1,2,2,1), 'I', 1. ) ! CAUTION: idem |
---|
| 247 | CALL lbc_lnk( alambd(:,:,1,2,2,2), 'I', 1. ) ! |
---|
| 248 | CALL lbc_lnk( alambd(:,:,1,2,1,1), 'I', 1. ) ! |
---|
| 249 | CALL lbc_lnk( alambd(:,:,1,2,1,2), 'I', 1. ) ! |
---|
| 250 | |
---|
| 251 | CALL lbc_lnk( alambd(:,:,2,1,2,1), 'I', 1. ) ! CAUTION: idem |
---|
| 252 | CALL lbc_lnk( alambd(:,:,2,1,2,2), 'I', 1. ) ! |
---|
| 253 | CALL lbc_lnk( alambd(:,:,2,1,1,1), 'I', 1. ) ! |
---|
| 254 | CALL lbc_lnk( alambd(:,:,2,1,1,2), 'I', 1. ) ! |
---|
[2528] | 255 | #endif |
---|
[3] | 256 | |
---|
| 257 | |
---|
| 258 | ! Initialization of ice masks |
---|
| 259 | !---------------------------- |
---|
| 260 | |
---|
| 261 | tms(:,:) = tmask(:,:,1) ! ice T-point : use surface tmask |
---|
| 262 | |
---|
[2528] | 263 | #if defined key_lim2_vp |
---|
| 264 | ! VP rheology : ice velocity point is I-point |
---|
[3] | 265 | !i here we can use umask with a i and j shift of -1,-1 |
---|
| 266 | tmu(:,1) = 0.e0 |
---|
| 267 | tmu(1,:) = 0.e0 |
---|
| 268 | DO jj = 2, jpj ! ice U.V-point: computed from ice T-point mask |
---|
[1694] | 269 | DO ji = 2, jpim1 ! NO vector opt. |
---|
[3] | 270 | tmu(ji,jj) = tms(ji,jj) * tms(ji-1,jj) * tms(ji,jj-1) * tms(ji-1,jj-1) |
---|
| 271 | END DO |
---|
| 272 | END DO |
---|
[2528] | 273 | CALL lbc_lnk( tmu(:,:), 'I', 1. ) !--lateral boundary conditions |
---|
| 274 | #else |
---|
| 275 | ! EVP rheology : ice velocity point are U- & V-points ; ice vorticity |
---|
| 276 | ! point is F-point |
---|
| 277 | tmu(:,:) = umask(:,:,1) |
---|
| 278 | tmv(:,:) = vmask(:,:,1) |
---|
| 279 | tmf(:,:) = 0.e0 ! used of fmask except its special value along the coast (rn_shlat) |
---|
| 280 | WHERE( fmask(:,:,1) == 1.e0 ) tmf(:,:) = 1.e0 |
---|
| 281 | #endif |
---|
| 282 | ! |
---|
[3] | 283 | ! unmasked and masked area of T-grid cell |
---|
| 284 | area(:,:) = e1t(:,:) * e2t(:,:) |
---|
[2528] | 285 | ! |
---|
[3294] | 286 | #if defined key_lim2_vp |
---|
| 287 | CALL wrk_dealloc( jpi, jpj, zd2d1, zd1d2 ) |
---|
| 288 | #endif |
---|
[2715] | 289 | ! |
---|
[821] | 290 | END SUBROUTINE lim_msh_2 |
---|
[58] | 291 | |
---|
[3] | 292 | #else |
---|
[58] | 293 | !!---------------------------------------------------------------------- |
---|
| 294 | !! Default option Dummy Module NO LIM sea-ice model |
---|
| 295 | !!---------------------------------------------------------------------- |
---|
[3] | 296 | CONTAINS |
---|
[821] | 297 | SUBROUTINE lim_msh_2 ! Dummy routine |
---|
| 298 | END SUBROUTINE lim_msh_2 |
---|
[58] | 299 | #endif |
---|
[3] | 300 | |
---|
| 301 | !!====================================================================== |
---|
[821] | 302 | END MODULE limmsh_2 |
---|