Changeset 719 for trunk/NEMO/LIM_SRC/limdyn.F90
- Timestamp:
- 2007-10-16T16:59:56+02:00 (17 years ago)
- File:
-
- 1 edited
-
trunk/NEMO/LIM_SRC/limdyn.F90 (modified) (11 diffs, 1 prop)
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trunk/NEMO/LIM_SRC/limdyn.F90
- Property svn:keywords changed from Id to Author Date Id Revision
r717 r719 4 4 !! Sea-Ice dynamics : 5 5 !!====================================================================== 6 !! History : 1.0 ! 01-04 (LIM) Original code7 !! 2.0 ! 02-08 (C. Ethe, G. Madec) F90, mpp8 !! 2.0 ! 03-08 (C. Ethe) add lim_dyn_init9 !! 2.0 ! 06-07 (G. Madec) Surface module10 !!---------------------------------------------------------------------11 6 #if defined key_ice_lim 12 7 !!---------------------------------------------------------------------- … … 16 11 !! lim_dyn_init : initialization and namelist read 17 12 !!---------------------------------------------------------------------- 18 USE dom_oce ! ocean space and time domain 19 USE sbc_oce ! 20 USE phycst ! 21 USE ice ! 22 USE ice_oce ! 23 USE dom_ice ! 24 USE iceini ! 25 USE limistate ! 26 USE limrhg ! ice rheology 27 28 USE lbclnk ! 29 USE lib_mpp ! 30 USE in_out_manager ! I/O manager 31 USE prtctl ! Print control 13 !! * Modules used 14 USE phycst 15 USE in_out_manager ! I/O manager 16 USE dom_ice 17 USE dom_oce ! ocean space and time domain 18 USE ice 19 USE ice_oce 20 USE iceini 21 USE limistate 22 USE limrhg ! ice rheology 23 USE lbclnk 24 USE lib_mpp 25 USE prtctl ! Print control 32 26 33 27 IMPLICIT NONE 34 28 PRIVATE 35 29 36 PUBLIC lim_dyn ! routine called by ice_step 37 30 !! * Accessibility 31 PUBLIC lim_dyn ! routine called by ice_step 32 33 !! * Module variables 38 34 REAL(wp) :: rone = 1.e0 ! constant value 39 35 40 # include "vectopt_loop_substitute.h90" 41 !!---------------------------------------------------------------------- 42 !! LIM 2.0, UCL-LOCEAN-IPSL (2006) 43 !! $Id$ 44 !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) 36 !!---------------------------------------------------------------------- 37 !! LIM 2.0, UCL-LOCEAN-IPSL (2005) 38 !! $Header$ 39 !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt 45 40 !!---------------------------------------------------------------------- 46 41 … … 59 54 !! - computation of the stress at the ocean surface 60 55 !! - treatment of the case if no ice dynamic 56 !! History : 57 !! 1.0 ! 01-04 (LIM) Original code 58 !! 2.0 ! 02-08 (C. Ethe, G. Madec) F90, mpp 61 59 !!--------------------------------------------------------------------- 62 60 INTEGER, INTENT(in) :: kt ! number of iteration 63 !! 64 INTEGER :: ji, jj ! dummy loop indices 65 INTEGER :: i_j1, i_jpj ! Starting/ending j-indices for rheology 66 REAL(wp) :: zcoef ! temporary scalar 67 REAL(wp), DIMENSION(jpj) :: zind ! i-averaged indicator of sea-ice 68 REAL(wp), DIMENSION(jpj) :: zmsk ! i-averaged of tmask 69 REAL(wp), DIMENSION(jpi,jpj) :: zu_io, zv_io ! ice-ocean velocity 70 !!$ INTEGER :: ji, jj ! dummy loop indices 71 !!$ INTEGER :: i_j1, i_jpj ! Starting/ending j-indices for rheology 72 !!$ REAL(wp) :: & 73 !!$ ztairx, ztairy, & ! tempory scalars 74 !!$ zsang , zrhomod, & 75 !!$ ztglx , ztgly , & 76 !!$ zt11, zt12, zt21, zt22 , & 77 !!$ zustm, zsfrld, zsfrldm4, & 78 !!$ zu_ice, zv_ice, ztair2 79 !!$ REAL(wp),DIMENSION(jpi,jpj) :: zmod 80 !!$ REAL(wp),DIMENSION(jpj) :: & 81 !!$ zind, & ! i-averaged indicator of sea-ice 82 !!$ zmsk ! i-averaged of tmask 61 62 INTEGER :: ji, jj ! dummy loop indices 63 INTEGER :: i_j1, i_jpj ! Starting/ending j-indices for rheology 64 REAL(wp) :: & 65 ztairx, ztairy, & ! tempory scalars 66 zsang , zmod, & 67 ztglx , ztgly , & 68 zt11, zt12, zt21, zt22 , & 69 zustm, zsfrld, zsfrldm4, & 70 zu_ice, zv_ice, ztair2 71 REAL(wp),DIMENSION(jpj) :: & 72 zind, & ! i-averaged indicator of sea-ice 73 zmsk ! i-averaged of tmask 83 74 !!--------------------------------------------------------------------- 84 75 85 IF( kt == nit000 ) CALL lim_dyn_init ! Initialization (first time-step only)76 IF( kt == nit000 ) CALL lim_dyn_init ! Initialization (first time-step only) 86 77 87 IF ( ln_limdyn ) THEN78 IF ( ln_limdyn ) THEN 88 79 89 80 ! Mean ice and snow thicknesses. … … 91 82 hicm(:,:) = ( 1.0 - frld(:,:) ) * hicif(:,:) 92 83 84 u_oce(:,:) = u_io(:,:) * tmu(:,:) 85 v_oce(:,:) = v_io(:,:) * tmu(:,:) 86 93 87 ! ! Rheology (ice dynamics) 94 88 ! ! ======== … … 100 94 i_j1 = 1 101 95 i_jpj = jpj 102 IF(ln_ctl) CALL prt_ctl_info( 'lim_dyn : i_j1 = ', ivar1=i_j1, clinfo2=' ij_jpj = ', ivar2=i_jpj ) 96 IF(ln_ctl) THEN 97 CALL prt_ctl_info('lim_dyn : i_j1 = ', ivar1=i_j1, clinfo2=' ij_jpj = ', ivar2=i_jpj) 98 ENDIF 103 99 CALL lim_rhg( i_j1, i_jpj ) 104 100 … … 108 104 zind(jj) = SUM( frld (:,jj ) ) ! = FLOAT(jpj) if ocean everywhere on a j-line 109 105 zmsk(jj) = SUM( tmask(:,jj,1) ) ! = 0 if land everywhere on a j-line 106 !!i write(numout,*) narea, 'limdyn' , jj, zind(jj), zmsk(jj) 110 107 END DO 111 108 … … 158 155 ENDIF 159 156 160 IF(ln_ctl) CALL prt_ctl(tab2d_1=ui_ice , clinfo1=' lim_dyn : ui_ice :', tab2d_2=vi_ice , clinfo2=' vi_ice :') 157 IF(ln_ctl) THEN 158 CALL prt_ctl(tab2d_1=u_oce , clinfo1=' lim_dyn : u_oce :', tab2d_2=v_oce , clinfo2=' v_oce :') 159 CALL prt_ctl(tab2d_1=u_ice , clinfo1=' lim_dyn : u_ice :', tab2d_2=v_ice , clinfo2=' v_ice :') 160 ENDIF 161 161 162 !!$ ! ! Ice-Ocean stress 163 !!$ ! ! ================ 164 !!$ DO jj = 1, jpj 165 !!$ DO ji = 1, jpi 166 !!$!! zsang = SIGN(1.e0, gphif(ji-1,jj-1) ) * sangvg ! do the full loop and avoid lbc_lnk 167 !!$ zsang = SIGN(1.e0, gphif(ji,jj) ) * sangvg 168 !!$ zu_ice = u_ice(ji,jj) - u_io(ji,jj) 169 !!$ zv_ice = v_ice(ji,jj) - v_io(ji,jj) 170 !!$ zrhomod = zu_ice * zu_ice + zv_ice * zv_ice 171 !!$ zmod (ji,jj) = zrhomod 172 !!$ zrhomod = rhoco * SQRT( zrhomod ) 173 !!$ ftaux(ji,jj) = zrhomod * ( cangvg * zu_ice - zsang * zv_ice ) 174 !!$ ftauy(ji,jj) = zrhomod * ( cangvg * zv_ice + zsang * zu_ice ) 175 !!$ END DO 176 !!$ END DO 177 178 ! computation of friction velocity 179 ! -------------------------------- 180 ! ice-ocean velocity at U & V-points (ui_ice vi_ice at I-point ; ssu_m, ssv_m at U- & V-points) 181 182 DO jj = 1, jpjm1 183 DO ji = 1, fs_jpim1 ! vector opt. 184 zu_io(ji,jj) = 0.5 * ( ui_ice(ji+1,jj+1) + ui_ice(ji+1,jj ) ) - ssu_m(ji,jj) 185 zv_io(ji,jj) = 0.5 * ( vi_ice(ji+1,jj+1) + vi_ice(ji ,jj+1) ) - ssv_m(ji,jj) 162 ! ! Ice-Ocean stress 163 ! ! ================ 164 DO jj = 2, jpjm1 165 zsang = SIGN(1.e0, gphif(1,jj-1) ) * sangvg 166 DO ji = 2, jpim1 167 ! computation of wind stress over ocean in X and Y direction 168 #if defined key_coupled && defined key_lim_cp1 169 ztairx = frld(ji-1,jj ) * gtaux(ji-1,jj ) + frld(ji,jj ) * gtaux(ji,jj ) & 170 & + frld(ji-1,jj-1) * gtaux(ji-1,jj-1) + frld(ji,jj-1) * gtaux(ji,jj-1) 171 172 ztairy = frld(ji-1,jj ) * gtauy(ji-1,jj ) + frld(ji,jj ) * gtauy(ji,jj ) & 173 & + frld(ji-1,jj-1) * gtauy(ji-1,jj-1) + frld(ji,jj-1) * gtauy(ji,jj-1) 174 #else 175 zsfrld = frld(ji,jj) + frld(ji-1,jj) + frld(ji-1,jj-1) + frld(ji,jj-1) 176 ztairx = zsfrld * gtaux(ji,jj) 177 ztairy = zsfrld * gtauy(ji,jj) 178 #endif 179 zsfrldm4 = 4 - frld(ji,jj) - frld(ji-1,jj) - frld(ji-1,jj-1) - frld(ji,jj-1) 180 zu_ice = u_ice(ji,jj) - u_oce(ji,jj) 181 zv_ice = v_ice(ji,jj) - v_oce(ji,jj) 182 zmod = SQRT( zu_ice * zu_ice + zv_ice * zv_ice ) 183 ztglx = zsfrldm4 * rhoco * zmod * ( cangvg * zu_ice - zsang * zv_ice ) 184 ztgly = zsfrldm4 * rhoco * zmod * ( cangvg * zv_ice + zsang * zu_ice ) 185 186 tio_u(ji,jj) = - ( ztairx + 1.0 * ztglx ) / ( 4 * rau0 ) 187 tio_v(ji,jj) = - ( ztairy + 1.0 * ztgly ) / ( 4 * rau0 ) 186 188 END DO 187 189 END DO 188 ! frictional velocity at T-point 190 191 ! computation of friction velocity 189 192 DO jj = 2, jpjm1 190 DO ji = fs_2, fs_jpim1 ! vector opt. 191 ust2s(ji,jj) = 0.5 * cw & 192 & * ( zu_io(ji,jj) * zu_io(ji,jj) + zu_io(ji-1,jj) * zu_io(ji-1,jj) & 193 & + zv_io(ji,jj) * zv_io(ji,jj) + zv_io(ji,jj-1) * zv_io(ji,jj-1) ) * tms(ji,jj) 193 DO ji = 2, jpim1 194 195 zu_ice = u_ice(ji-1,jj-1) - u_oce(ji-1,jj-1) 196 zv_ice = v_ice(ji-1,jj-1) - v_oce(ji-1,jj-1) 197 zt11 = rhoco * ( zu_ice * zu_ice + zv_ice * zv_ice ) 198 199 zu_ice = u_ice(ji-1,jj) - u_oce(ji-1,jj) 200 zv_ice = v_ice(ji-1,jj) - v_oce(ji-1,jj) 201 zt12 = rhoco * ( zu_ice * zu_ice + zv_ice * zv_ice ) 202 203 zu_ice = u_ice(ji,jj-1) - u_oce(ji,jj-1) 204 zv_ice = v_ice(ji,jj-1) - v_oce(ji,jj-1) 205 zt21 = rhoco * ( zu_ice * zu_ice + zv_ice * zv_ice ) 206 207 zu_ice = u_ice(ji,jj) - u_oce(ji,jj) 208 zv_ice = v_ice(ji,jj) - v_oce(ji,jj) 209 zt22 = rhoco * ( zu_ice * zu_ice + zv_ice * zv_ice ) 210 211 ztair2 = gtaux(ji,jj) * gtaux(ji,jj) + gtauy(ji,jj) * gtauy(ji,jj) 212 213 zustm = ( 1 - frld(ji,jj) ) * 0.25 * ( zt11 + zt12 + zt21 + zt22 ) & 214 & + frld(ji,jj) * SQRT( ztair2 ) 215 216 ust2s(ji,jj) = ( zustm / rau0 ) * ( rone + sdvt(ji,jj) ) * tms(ji,jj) 194 217 END DO 195 218 END DO 196 !!$ DO jj = 2, jpjm1 197 !!$ DO ji = fs_2, fs_jpim1 ! vector opt. 198 !!$ ust2s(ji,jj) = 0.25 * cw * ( zmod(ji,jj+1) + zmod(ji+1,jj+1) + & 199 !!$ & zmod(ji,jj ) + zmod(ji+1,jj ) ) * tms(ji,jj) 200 !!$ END DO 201 !!$ END DO 202 ! 203 ELSE ! no ice dynamics : transmit directly the atmospheric stress to the ocean 204 ! 205 zcoef = SQRT( 0.5 ) / rau0 206 DO jj = 2, jpjm1 207 DO ji = fs_2, fs_jpim1 ! vector opt. 208 ust2s(ji,jj) = zcoef * tms(ji,jj) * SQRT( utau(ji,jj) * utau(ji,jj) + utau(ji-1,jj) * utau(ji-1,jj) & 209 & + vtau(ji,jj) * vtau(ji,jj) + vtau(ji,jj-1) * vtau(ji,jj-1) ) 219 220 ELSE ! no ice dynamics : transmit directly the atmospheric stress to the ocean 221 222 DO jj = 2, jpjm1 223 DO ji = 2, jpim1 224 #if defined key_coupled && defined key_lim_cp1 225 tio_u(ji,jj) = - ( gtaux(ji ,jj ) + gtaux(ji-1,jj ) & 226 & + gtaux(ji-1,jj-1) + gtaux(ji ,jj-1) ) / ( 4 * rau0 ) 227 228 tio_v(ji,jj) = - ( gtauy(ji ,jj ) + gtauy(ji-1,jj ) & 229 & + gtauy(ji-1,jj-1) + gtauy(ji ,jj-1) ) / ( 4 * rau0 ) 230 #else 231 tio_u(ji,jj) = - gtaux(ji,jj) / rau0 232 tio_v(ji,jj) = - gtauy(ji,jj) / rau0 233 #endif 234 ztair2 = gtaux(ji,jj) * gtaux(ji,jj) + gtauy(ji,jj) * gtauy(ji,jj) 235 zustm = SQRT( ztair2 ) 236 237 ust2s(ji,jj) = ( zustm / rau0 ) * ( rone + sdvt(ji,jj) ) * tms(ji,jj) 210 238 END DO 211 239 END DO 212 ! 240 213 241 ENDIF 214 242 215 243 CALL lbc_lnk( ust2s, 'T', 1. ) ! T-point 216 217 IF(ln_ctl) CALL prt_ctl(tab2d_1=ust2s , clinfo1=' lim_dyn : ust2s :') 244 CALL lbc_lnk( tio_u, 'I', -1. ) ! I-point (i.e. ice U-V point) 245 CALL lbc_lnk( tio_v, 'I', -1. ) ! I-point (i.e. ice U-V point) 246 247 IF(ln_ctl) THEN 248 CALL prt_ctl(tab2d_1=tio_u , clinfo1=' lim_dyn : tio_u :', tab2d_2=tio_v , clinfo2=' tio_v :') 249 CALL prt_ctl(tab2d_1=ust2s , clinfo1=' lim_dyn : ust2s :') 250 ENDIF 218 251 219 252 END SUBROUTINE lim_dyn … … 224 257 !! *** ROUTINE lim_dyn_init *** 225 258 !! 226 !! ** Purpose : 227 !! 228 !! 229 !! ** Method : 230 !! parameter values259 !! ** Purpose : Physical constants and parameters linked to the ice 260 !! dynamics 261 !! 262 !! ** Method : Read the namicedyn namelist and check the ice-dynamic 263 !! parameter values called at the first timestep (nit000) 231 264 !! 232 265 !! ** input : Namelist namicedyn 266 !! 267 !! history : 268 !! 8.5 ! 03-08 (C. Ethe) original code 233 269 !!------------------------------------------------------------------- 234 270 NAMELIST/namicedyn/ epsd, alpha, & … … 237 273 !!------------------------------------------------------------------- 238 274 239 REWIND ( numnam_ice ) ! Read Namelist namicedyn 275 ! Define the initial parameters 276 ! ------------------------- 277 278 ! Read Namelist namicedyn 279 REWIND ( numnam_ice ) 240 280 READ ( numnam_ice , namicedyn ) 241 242 IF(lwp) THEN ! Control print 281 IF(lwp) THEN 243 282 WRITE(numout,*) 244 283 WRITE(numout,*) 'lim_dyn_init : ice parameters for ice dynamics ' … … 252 291 WRITE(numout,*) ' maximum value for the residual of relaxation resl = ', resl 253 292 WRITE(numout,*) ' drag coefficient for oceanic stress cw = ', cw 254 WRITE(numout,*) ' turning angle for oceanic stress angvg = ', angvg , ' degrees'293 WRITE(numout,*) ' turning angle for oceanic stress angvg = ', angvg 255 294 WRITE(numout,*) ' first bulk-rheology parameter pstar = ', pstar 256 295 WRITE(numout,*) ' second bulk-rhelogy parameter c_rhg = ', c_rhg … … 261 300 ENDIF 262 301 302 ! Initialization 263 303 usecc2 = 1.0 / ( ecc * ecc ) 264 304 rhoco = rau0 * cw 265 angvg = angvg * rad ! convert angvg from degree to radian305 angvg = angvg * rad 266 306 sangvg = SIN( angvg ) 267 307 cangvg = COS( angvg ) 268 308 pstarh = pstar / 2.0 269 ! 270 ahiu(:,:) = ahi0 * umask(:,:,1) ! Ice eddy Diffusivity coefficients. 309 sdvt(:,:) = 0.e0 310 311 ! Diffusion coefficients. 312 ahiu(:,:) = ahi0 * umask(:,:,1) 271 313 ahiv(:,:) = ahi0 * vmask(:,:,1) 272 ! 314 273 315 END SUBROUTINE lim_dyn_init 274 316
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