[3] | 1 | MODULE limmsh |
---|
| 2 | !!====================================================================== |
---|
| 3 | !! *** MODULE limmsh *** |
---|
[12] | 4 | !! LIM ice model : definition of the ice mesh parameters |
---|
[3] | 5 | !!====================================================================== |
---|
[58] | 6 | #if defined key_ice_lim |
---|
[3] | 7 | !!---------------------------------------------------------------------- |
---|
[58] | 8 | !! 'key_ice_lim' LIM sea-ice model |
---|
| 9 | !!---------------------------------------------------------------------- |
---|
[3] | 10 | !! lim_msh : definition of the ice mesh |
---|
| 11 | !!---------------------------------------------------------------------- |
---|
| 12 | !! * Modules used |
---|
| 13 | USE phycst |
---|
| 14 | USE dom_oce |
---|
| 15 | USE dom_ice |
---|
| 16 | USE lbclnk |
---|
[58] | 17 | USE in_out_manager |
---|
[3] | 18 | |
---|
| 19 | IMPLICIT NONE |
---|
| 20 | PRIVATE |
---|
| 21 | |
---|
| 22 | !! * Accessibility |
---|
| 23 | PUBLIC lim_msh ! routine called by ice_ini.F90 |
---|
| 24 | |
---|
| 25 | !!---------------------------------------------------------------------- |
---|
| 26 | !! LIM 2.0 , UCL-LODYC-IPSL (2003) |
---|
| 27 | !!---------------------------------------------------------------------- |
---|
| 28 | |
---|
| 29 | CONTAINS |
---|
| 30 | |
---|
| 31 | SUBROUTINE lim_msh |
---|
| 32 | !!------------------------------------------------------------------- |
---|
| 33 | !! *** ROUTINE lim_msh *** |
---|
| 34 | !! |
---|
| 35 | !! ** Purpose : Definition of the charact. of the numerical grid |
---|
| 36 | !! |
---|
| 37 | !! ** Action : - Initialisation of some variables |
---|
| 38 | !! - Definition of some constants linked with the grid |
---|
| 39 | !! - Definition of the metric coef. for the sea/ice |
---|
| 40 | !! - Initialization of the ice masks (tmsk, umsk) |
---|
| 41 | !! |
---|
| 42 | !! ** Refer. : Deleersnijder et al. Ocean Modelling 100, 7-10 |
---|
| 43 | !! |
---|
| 44 | !! ** History : |
---|
| 45 | !! original : 01-04 (LIM) |
---|
| 46 | !! addition : 02-08 (C. Ethe, G. Madec) |
---|
| 47 | !!--------------------------------------------------------------------- |
---|
| 48 | !! * Local variables |
---|
[12] | 49 | INTEGER :: ji, jj ! dummy loop indices |
---|
[3] | 50 | |
---|
| 51 | REAL(wp), DIMENSION(jpi,jpj) :: & |
---|
[12] | 52 | zd2d1 , zd1d2 ! Derivative of zh2 (resp. zh1) in the x direction |
---|
| 53 | ! ! (resp. y direction) (defined at the center) |
---|
[3] | 54 | REAL(wp) :: & |
---|
[58] | 55 | zh1p , zh2p , & ! Idem zh1, zh2 for the bottom left corner of the grid |
---|
| 56 | zd2d1p, zd1d2p , & ! Idem zd2d1, zd1d2 for the bottom left corner of the grid |
---|
| 57 | zusden, zusden2 ! temporary scalars |
---|
[3] | 58 | !!--------------------------------------------------------------------- |
---|
[58] | 59 | |
---|
| 60 | IF(lwp) THEN |
---|
| 61 | WRITE(numout,*) |
---|
| 62 | WRITE(numout,*) 'lim_msh : LIM sea-ice model, mesh initialization' |
---|
| 63 | WRITE(numout,*) '~~~~~~~' |
---|
| 64 | ENDIF |
---|
[3] | 65 | |
---|
| 66 | !---------------------------------------------------------- |
---|
| 67 | ! Initialization of local and some global (common) variables |
---|
| 68 | !------------------------------------------------------------------ |
---|
| 69 | |
---|
[58] | 70 | njeq = INT( jpj / 2 ) !i bug mpp potentiel |
---|
| 71 | njeqm1 = njeq - 1 |
---|
[3] | 72 | |
---|
| 73 | fcor(:,:) = 2. * omega * SIN( gphit(:,:) * rad ) ! coriolis factor |
---|
| 74 | |
---|
[58] | 75 | !i DO jj = 1, jpj |
---|
| 76 | !i zmsk(jj) = SUM( tmask(:,jj,:) ) ! = 0 if land everywhere on a j-line |
---|
| 77 | !!ii write(numout,*) jj, zind(jj) |
---|
| 78 | !i END DO |
---|
[3] | 79 | |
---|
[58] | 80 | IF( fcor(1,1) * fcor(1,nlcj) < 0.e0 ) THEN ! local domain include both hemisphere |
---|
| 81 | l_jeq = .TRUE. |
---|
| 82 | njeq = 1 |
---|
| 83 | DO WHILE ( njeq <= jpj .AND. fcor(1,njeq) < 0.e0 ) |
---|
| 84 | njeq = njeq + 1 |
---|
| 85 | END DO |
---|
| 86 | IF(lwp ) WRITE(numout,*) ' the equator is inside the domain at about njeq = ', njeq |
---|
| 87 | ELSEIF( fcor(1,1) < 0.e0 ) THEN |
---|
| 88 | l_jeq = .FALSE. |
---|
| 89 | njeq = jpj + 10 |
---|
| 90 | IF(lwp ) WRITE(numout,*) ' the model domain is entirely in the southern hemisphere: njeq = ', njeq |
---|
| 91 | ELSE |
---|
| 92 | l_jeq = .FALSE. |
---|
| 93 | njeq = -10 |
---|
| 94 | IF(lwp ) WRITE(numout,*) ' the model domain is entirely in the northern hemisphere: njeq = ', njeq |
---|
| 95 | ENDIF |
---|
| 96 | |
---|
| 97 | njeqm1 = njeq - 1 |
---|
| 98 | |
---|
| 99 | |
---|
[3] | 100 | ! For each grid, definition of geometric tables |
---|
| 101 | !------------------------------------------------------------------ |
---|
| 102 | |
---|
| 103 | !------------------- |
---|
[58] | 104 | ! Conventions : ! |
---|
[3] | 105 | !------------------- |
---|
| 106 | ! indices 1 \ 2 <-> localisation in the 2 direction x \ y |
---|
| 107 | ! 3rd indice <-> localisation on the mesh : |
---|
| 108 | ! 0 = Centre ; 1 = corner W x(i-1/2) ; 2 = corner S y(j-1/2) ; |
---|
| 109 | ! 3 = corner SW x(i-1/2),y(j-1/2) |
---|
| 110 | !------------------- |
---|
[58] | 111 | !!ibug ??? |
---|
| 112 | akappa(:,:,:,:) = 0.e0 |
---|
| 113 | wght(:,:,:,:) = 0.e0 |
---|
| 114 | alambd(:,:,:,:,:,:) = 0.e0 |
---|
| 115 | tmu(:,:) = 0.e0 |
---|
| 116 | !!i |
---|
[3] | 117 | |
---|
| 118 | |
---|
| 119 | ! metric coefficients for sea ice dynamic |
---|
| 120 | !---------------------------------------- |
---|
| 121 | ! ! akappa |
---|
[12] | 122 | DO jj = 2, jpj |
---|
[58] | 123 | zd1d2(:,jj) = e1v(:,jj) - e1v(:,jj-1) |
---|
[3] | 124 | END DO |
---|
[12] | 125 | CALL lbc_lnk( zd1d2, 'T', -1. ) |
---|
[3] | 126 | |
---|
[58] | 127 | DO ji = 2, jpi |
---|
| 128 | zd2d1(ji,:) = e2u(ji,:) - e2u(ji-1,:) |
---|
[3] | 129 | END DO |
---|
[12] | 130 | CALL lbc_lnk( zd2d1, 'T', -1. ) |
---|
[3] | 131 | |
---|
[58] | 132 | akappa(:,:,1,1) = 1.0 / ( 2.0 * e1t(:,:) ) |
---|
| 133 | akappa(:,:,1,2) = zd1d2(:,:) / ( 4.0 * e1t(:,:) * e2t(:,:) ) |
---|
| 134 | akappa(:,:,2,1) = zd2d1(:,:) / ( 4.0 * e1t(:,:) * e2t(:,:) ) |
---|
| 135 | akappa(:,:,2,2) = 1.0 / ( 2.0 * e2t(:,:) ) |
---|
[3] | 136 | |
---|
| 137 | ! ! weights (wght) |
---|
[12] | 138 | DO jj = 2, jpj |
---|
| 139 | DO ji = 2, jpi |
---|
[3] | 140 | zusden = 1. / ( ( e1t(ji,jj) + e1t(ji-1,jj ) ) & |
---|
| 141 | & * ( e2t(ji,jj) + e2t(ji ,jj-1) ) ) |
---|
| 142 | wght(ji,jj,1,1) = zusden * e1t(ji ,jj) * e2t(ji,jj ) |
---|
| 143 | wght(ji,jj,1,2) = zusden * e1t(ji ,jj) * e2t(ji,jj-1) |
---|
| 144 | wght(ji,jj,2,1) = zusden * e1t(ji-1,jj) * e2t(ji,jj ) |
---|
| 145 | wght(ji,jj,2,2) = zusden * e1t(ji-1,jj) * e2t(ji,jj-1) |
---|
| 146 | END DO |
---|
| 147 | END DO |
---|
| 148 | CALL lbc_lnk( wght(:,:,1,1), 'I', 1. ) ! CAUTION: even with the lbc_lnk at ice U-V-point |
---|
| 149 | CALL lbc_lnk( wght(:,:,1,2), 'I', 1. ) ! the value of wght at jpj is wrong |
---|
| 150 | CALL lbc_lnk( wght(:,:,2,1), 'I', 1. ) ! but it is never used |
---|
| 151 | CALL lbc_lnk( wght(:,:,2,2), 'I', 1. ) |
---|
| 152 | |
---|
| 153 | ! Coefficients for divergence of the stress tensor |
---|
| 154 | !------------------------------------------------- |
---|
| 155 | |
---|
[12] | 156 | DO jj = 2, jpj |
---|
| 157 | DO ji = 2, jpi |
---|
[3] | 158 | zh1p = e1t(ji ,jj ) * wght(ji,jj,2,2) & |
---|
| 159 | & + e1t(ji-1,jj ) * wght(ji,jj,1,2) & |
---|
| 160 | & + e1t(ji ,jj-1) * wght(ji,jj,2,1) & |
---|
| 161 | & + e1t(ji-1,jj-1) * wght(ji,jj,1,1) |
---|
| 162 | |
---|
| 163 | zh2p = e2t(ji ,jj ) * wght(ji,jj,2,2) & |
---|
| 164 | & + e2t(ji-1,jj ) * wght(ji,jj,1,2) & |
---|
| 165 | & + e2t(ji ,jj-1) * wght(ji,jj,2,1) & |
---|
| 166 | & + e2t(ji-1,jj-1) * wght(ji,jj,1,1) |
---|
| 167 | |
---|
[58] | 168 | ! better written but change the last digit and thus solver in less than 100 timestep |
---|
[3] | 169 | ! zh1p = e1t(ji-1,jj ) * wght(ji,jj,1,2) + e1t(ji,jj ) * wght(ji,jj,2,2) & |
---|
| 170 | ! & + e1t(ji-1,jj-1) * wght(ji,jj,1,1) + e1t(ji,jj-1) * wght(ji,jj,2,1) |
---|
| 171 | |
---|
| 172 | ! zh2p = e2t(ji-1,jj ) * wght(ji,jj,1,2) + e2t(ji,jj ) * wght(ji,jj,2,2) & |
---|
| 173 | ! & + e2t(ji-1,jj-1) * wght(ji,jj,1,1) + e2t(ji,jj-1) * wght(ji,jj,2,1) |
---|
| 174 | |
---|
[58] | 175 | !!ibug =0 zusden = 1.0 / ( zh1p * zh2p * 4.e0 ) |
---|
| 176 | zusden = 1.0 / MAX( zh1p * zh2p * 4.e0 , 1.e-20 ) |
---|
[3] | 177 | zusden2 = zusden * 2.0 |
---|
| 178 | |
---|
| 179 | zd1d2p = zusden * 0.5 * ( -e1t(ji-1,jj-1) + e1t(ji-1,jj ) - e1t(ji,jj-1) + e1t(ji ,jj) ) |
---|
| 180 | zd2d1p = zusden * 0.5 * ( e2t(ji ,jj-1) - e2t(ji-1,jj-1) + e2t(ji,jj ) - e2t(ji-1,jj) ) |
---|
| 181 | |
---|
| 182 | alambd(ji,jj,2,2,2,1) = zusden2 * e2t(ji ,jj-1) |
---|
| 183 | alambd(ji,jj,2,2,2,2) = zusden2 * e2t(ji ,jj ) |
---|
| 184 | alambd(ji,jj,2,2,1,1) = zusden2 * e2t(ji-1,jj-1) |
---|
| 185 | alambd(ji,jj,2,2,1,2) = zusden2 * e2t(ji-1,jj ) |
---|
| 186 | |
---|
| 187 | alambd(ji,jj,1,1,2,1) = zusden2 * e1t(ji ,jj-1) |
---|
| 188 | alambd(ji,jj,1,1,2,2) = zusden2 * e1t(ji ,jj ) |
---|
| 189 | alambd(ji,jj,1,1,1,1) = zusden2 * e1t(ji-1,jj-1) |
---|
| 190 | alambd(ji,jj,1,1,1,2) = zusden2 * e1t(ji-1,jj ) |
---|
| 191 | |
---|
| 192 | alambd(ji,jj,1,2,2,1) = zd1d2p |
---|
| 193 | alambd(ji,jj,1,2,2,2) = zd1d2p |
---|
| 194 | alambd(ji,jj,1,2,1,1) = zd1d2p |
---|
| 195 | alambd(ji,jj,1,2,1,2) = zd1d2p |
---|
| 196 | |
---|
| 197 | alambd(ji,jj,2,1,2,1) = zd2d1p |
---|
| 198 | alambd(ji,jj,2,1,2,2) = zd2d1p |
---|
| 199 | alambd(ji,jj,2,1,1,1) = zd2d1p |
---|
| 200 | alambd(ji,jj,2,1,1,2) = zd2d1p |
---|
| 201 | END DO |
---|
| 202 | END DO |
---|
| 203 | |
---|
| 204 | CALL lbc_lnk( alambd(:,:,2,2,2,1), 'I', 1. ) ! CAUTION: even with the lbc_lnk at ice U-V point |
---|
| 205 | CALL lbc_lnk( alambd(:,:,2,2,2,2), 'I', 1. ) ! the value of wght at jpj is wrong |
---|
| 206 | CALL lbc_lnk( alambd(:,:,2,2,1,1), 'I', 1. ) ! but it is never used |
---|
| 207 | CALL lbc_lnk( alambd(:,:,2,2,1,2), 'I', 1. ) ! |
---|
| 208 | |
---|
| 209 | CALL lbc_lnk( alambd(:,:,1,1,2,1), 'I', 1. ) ! CAUTION: idem |
---|
| 210 | CALL lbc_lnk( alambd(:,:,1,1,2,2), 'I', 1. ) ! |
---|
| 211 | CALL lbc_lnk( alambd(:,:,1,1,1,1), 'I', 1. ) ! |
---|
| 212 | CALL lbc_lnk( alambd(:,:,1,1,1,2), 'I', 1. ) ! |
---|
| 213 | |
---|
| 214 | CALL lbc_lnk( alambd(:,:,1,2,2,1), 'I', 1. ) ! CAUTION: idem |
---|
| 215 | CALL lbc_lnk( alambd(:,:,1,2,2,2), 'I', 1. ) ! |
---|
| 216 | CALL lbc_lnk( alambd(:,:,1,2,1,1), 'I', 1. ) ! |
---|
| 217 | CALL lbc_lnk( alambd(:,:,1,2,1,2), 'I', 1. ) ! |
---|
| 218 | |
---|
| 219 | CALL lbc_lnk( alambd(:,:,2,1,2,1), 'I', 1. ) ! CAUTION: idem |
---|
| 220 | CALL lbc_lnk( alambd(:,:,2,1,2,2), 'I', 1. ) ! |
---|
| 221 | CALL lbc_lnk( alambd(:,:,2,1,1,1), 'I', 1. ) ! |
---|
| 222 | CALL lbc_lnk( alambd(:,:,2,1,1,2), 'I', 1. ) ! |
---|
| 223 | |
---|
| 224 | |
---|
| 225 | ! Initialization of ice masks |
---|
| 226 | !---------------------------- |
---|
| 227 | |
---|
| 228 | tms(:,:) = tmask(:,:,1) ! ice T-point : use surface tmask |
---|
| 229 | |
---|
| 230 | !i here we can use umask with a i and j shift of -1,-1 |
---|
| 231 | tmu(:,1) = 0.e0 |
---|
| 232 | tmu(1,:) = 0.e0 |
---|
| 233 | DO jj = 2, jpj ! ice U.V-point: computed from ice T-point mask |
---|
[12] | 234 | DO ji = 2, jpim1 |
---|
[3] | 235 | tmu(ji,jj) = tms(ji,jj) * tms(ji-1,jj) * tms(ji,jj-1) * tms(ji-1,jj-1) |
---|
| 236 | END DO |
---|
| 237 | END DO |
---|
| 238 | |
---|
| 239 | !--lateral boundary conditions |
---|
| 240 | CALL lbc_lnk( tmu(:,:), 'I', 1. ) |
---|
| 241 | |
---|
| 242 | ! unmasked and masked area of T-grid cell |
---|
| 243 | area(:,:) = e1t(:,:) * e2t(:,:) |
---|
| 244 | |
---|
| 245 | END SUBROUTINE lim_msh |
---|
[58] | 246 | |
---|
[3] | 247 | #else |
---|
[58] | 248 | !!---------------------------------------------------------------------- |
---|
| 249 | !! Default option Dummy Module NO LIM sea-ice model |
---|
| 250 | !!---------------------------------------------------------------------- |
---|
[3] | 251 | CONTAINS |
---|
[58] | 252 | SUBROUTINE lim_msh ! Dummy routine |
---|
[3] | 253 | END SUBROUTINE lim_msh |
---|
[58] | 254 | #endif |
---|
[3] | 255 | |
---|
| 256 | !!====================================================================== |
---|
| 257 | END MODULE limmsh |
---|