Changeset 888 for trunk/NEMO/LIM_SRC_2/limdyn_2.F90
- Timestamp:
- 2008-04-11T19:05:03+02:00 (16 years ago)
- File:
-
- 1 edited
-
trunk/NEMO/LIM_SRC_2/limdyn_2.F90 (modified) (12 diffs)
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trunk/NEMO/LIM_SRC_2/limdyn_2.F90
r823 r888 4 4 !! Sea-Ice dynamics : 5 5 !!====================================================================== 6 !! History : 1.0 ! 01-04 (LIM) Original code 7 !! 2.0 ! 02-08 (C. Ethe, G. Madec) F90, mpp 8 !! 2.0 ! 03-08 (C. Ethe) add lim_dyn_init 9 !! 2.0 ! 06-07 (G. Madec) Surface module 10 !!--------------------------------------------------------------------- 6 11 #if defined key_lim2 7 12 !!---------------------------------------------------------------------- … … 11 16 !! lim_dyn_init_2 : initialization and namelist read 12 17 !!---------------------------------------------------------------------- 13 !! * Modules used 14 USE phycst 15 USE in_out_manager ! I/O manager 16 USE dom_ice_2 17 USE dom_oce ! ocean space and time domain 18 USE ice_2 19 USE ice_oce 20 USE iceini_2 21 USE limistate_2 22 USE limrhg_2 ! ice rheology 23 USE lbclnk 24 USE lib_mpp 25 USE prtctl ! Print control 18 USE dom_oce ! ocean space and time domain 19 USE sbc_oce ! 20 USE phycst ! 21 USE ice_2 ! 22 USE ice_oce ! 23 USE dom_ice_2 ! 24 USE iceini_2 ! 25 USE limistate_2 ! 26 USE limrhg_2 ! ice rheology 27 28 USE lbclnk ! 29 USE lib_mpp ! 30 USE in_out_manager ! I/O manager 31 USE prtctl ! Print control 26 32 27 33 IMPLICIT NONE 28 34 PRIVATE 29 35 30 !! * Accessibility 31 PUBLIC lim_dyn_2 ! routine called by ice_step 36 PUBLIC lim_dyn_2 ! routine called by sbc_ice_lim 32 37 33 38 !! * Module variables 34 39 REAL(wp) :: rone = 1.e0 ! constant value 35 40 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 41 # include "vectopt_loop_substitute.h90" 42 !!---------------------------------------------------------------------- 43 !! LIM 2.0, UCL-LOCEAN-IPSL (2006) 44 !! $ Id: $ 45 !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) 40 46 !!---------------------------------------------------------------------- 41 47 … … 46 52 !! *** ROUTINE lim_dyn_2 *** 47 53 !! 48 !! ** Purpose : compute ice velocity and ocean-ice stress54 !! ** Purpose : compute ice velocity and ocean-ice friction velocity 49 55 !! 50 56 !! ** Method : … … 52 58 !! ** Action : - Initialisation 53 59 !! - Call of the dynamic routine for each hemisphere 54 !! - computation of the stress at the ocean surface60 !! - computation of the friction velocity at the sea-ice base 55 61 !! - treatment of the case if no ice dynamic 56 !! History :57 !! 1.0 ! 01-04 (LIM) Original code58 !! 2.0 ! 02-08 (C. Ethe, G. Madec) F90, mpp59 62 !!--------------------------------------------------------------------- 60 63 INTEGER, INTENT(in) :: kt ! number of iteration 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 64 !! 65 INTEGER :: ji, jj ! dummy loop indices 66 INTEGER :: i_j1, i_jpj ! Starting/ending j-indices for rheology 67 REAL(wp) :: zcoef ! temporary scalar 68 REAL(wp), DIMENSION(jpj) :: zind ! i-averaged indicator of sea-ice 69 REAL(wp), DIMENSION(jpj) :: zmsk ! i-averaged of tmask 70 REAL(wp), DIMENSION(jpi,jpj) :: zu_io, zv_io ! ice-ocean velocity 74 71 !!--------------------------------------------------------------------- 75 72 76 IF( kt == nit000 73 IF( kt == nit000 ) CALL lim_dyn_init_2 ! Initialization (first time-step only) 77 74 78 IF 79 75 IF( ln_limdyn ) THEN 76 ! 80 77 ! Mean ice and snow thicknesses. 81 78 hsnm(:,:) = ( 1.0 - frld(:,:) ) * hsnif(:,:) 82 79 hicm(:,:) = ( 1.0 - frld(:,:) ) * hicif(:,:) 83 84 u_oce(:,:) = u_io(:,:) * tmu(:,:) 85 v_oce(:,:) = v_io(:,:) * tmu(:,:) 86 87 ! ! Rheology (ice dynamics) 88 ! ! ======== 80 ! 81 ! ! Rheology (ice dynamics) 82 ! ! ======== 89 83 90 84 ! Define the j-limits where ice rheology is computed … … 94 88 i_j1 = 1 95 89 i_jpj = 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 90 IF(ln_ctl) CALL prt_ctl_info( 'lim_dyn : i_j1 = ', ivar1=i_j1, clinfo2=' ij_jpj = ', ivar2=i_jpj ) 99 91 CALL lim_rhg_2( i_j1, i_jpj ) 100 92 ! 101 93 ELSE ! optimization of the computational area 102 94 ! 103 95 DO jj = 1, jpj 104 96 zind(jj) = SUM( frld (:,jj ) ) ! = FLOAT(jpj) if ocean everywhere on a j-line 105 97 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) 107 END DO 108 98 END DO 99 ! 109 100 IF( l_jeq ) THEN ! local domain include both hemisphere 110 101 ! ! Rheology is computed in each hemisphere … … 118 109 i_j1 = MAX( 1, i_j1-1 ) 119 110 IF(ln_ctl) WRITE(numout,*) 'lim_dyn : NH i_j1 = ', i_j1, ' ij_jpj = ', i_jpj 120 111 ! 121 112 CALL lim_rhg_2( i_j1, i_jpj ) 122 113 ! 123 114 ! Southern hemisphere 124 115 i_j1 = 1 … … 129 120 i_jpj = MIN( jpj, i_jpj+2 ) 130 121 IF(ln_ctl) WRITE(numout,*) 'lim_dyn : SH i_j1 = ', i_j1, ' ij_jpj = ', i_jpj 131 122 ! 132 123 CALL lim_rhg_2( i_j1, i_jpj ) 133 124 ! 134 125 ELSE ! local domain extends over one hemisphere only 135 126 ! ! Rheology is computed only over the ice cover … … 148 139 149 140 IF(ln_ctl) WRITE(numout,*) 'lim_dyn : one hemisphere: i_j1 = ', i_j1, ' ij_jpj = ', i_jpj 150 141 ! 151 142 CALL lim_rhg_2( i_j1, i_jpj ) 152 143 ! 153 144 ENDIF 154 145 ! 155 146 ENDIF 156 147 157 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 161 162 ! ! Ice-Ocean stress 163 ! ! ================ 148 IF(ln_ctl) CALL prt_ctl(tab2d_1=ui_ice , clinfo1=' lim_dyn : ui_ice :', tab2d_2=vi_ice , clinfo2=' vi_ice :') 149 150 ! computation of friction velocity 151 ! -------------------------------- 152 ! ice-ocean velocity at U & V-points (ui_ice vi_ice at I-point ; ssu_m, ssv_m at U- & V-points) 153 154 DO jj = 1, jpjm1 155 DO ji = 1, fs_jpim1 ! vector opt. 156 zu_io(ji,jj) = 0.5 * ( ui_ice(ji+1,jj+1) + ui_ice(ji+1,jj ) ) - ssu_m(ji,jj) 157 zv_io(ji,jj) = 0.5 * ( vi_ice(ji+1,jj+1) + vi_ice(ji ,jj+1) ) - ssv_m(ji,jj) 158 END DO 159 END DO 160 ! frictional velocity at T-point 164 161 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 ) 162 DO ji = fs_2, fs_jpim1 ! vector opt. 163 ust2s(ji,jj) = 0.5 * cw & 164 & * ( zu_io(ji,jj) * zu_io(ji,jj) + zu_io(ji-1,jj) * zu_io(ji-1,jj) & 165 & + zv_io(ji,jj) * zv_io(ji,jj) + zv_io(ji,jj-1) * zv_io(ji,jj-1) ) * tms(ji,jj) 188 166 END DO 189 167 END DO 190 191 ! computation of friction velocity 168 ! 169 ELSE ! no ice dynamics : transmit directly the atmospheric stress to the ocean 170 ! 171 zcoef = SQRT( 0.5 ) / rau0 192 172 DO jj = 2, jpjm1 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) 173 DO ji = fs_2, fs_jpim1 ! vector opt. 174 ust2s(ji,jj) = zcoef * tms(ji,jj) * SQRT( utau(ji,jj) * utau(ji,jj) + utau(ji-1,jj) * utau(ji-1,jj) & 175 & + vtau(ji,jj) * vtau(ji,jj) + vtau(ji,jj-1) * vtau(ji,jj-1) ) 217 176 END DO 218 177 END DO 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) 238 END DO 239 END DO 240 178 ! 241 179 ENDIF 242 180 ! 243 181 CALL lbc_lnk( ust2s, 'T', 1. ) ! T-point 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 182 ! 183 IF(ln_ctl) CALL prt_ctl(tab2d_1=ust2s , clinfo1=' lim_dyn : ust2s :') 251 184 252 185 END SUBROUTINE lim_dyn_2 … … 257 190 !! *** ROUTINE lim_dyn_init_2 *** 258 191 !! 259 !! ** Purpose : Physical constants and parameters linked to the ice260 !! dynamics261 !! 262 !! ** Method : Read the namicedyn namelist and check the ice-dynamic263 !! parameter values called at the first timestep (nit000)192 !! ** Purpose : Physical constants and parameters linked to the ice 193 !! dynamics 194 !! 195 !! ** Method : Read the namicedyn namelist and check the ice-dynamic 196 !! parameter values 264 197 !! 265 198 !! ** input : Namelist namicedyn 266 !!267 !! history :268 !! 8.5 ! 03-08 (C. Ethe) original code269 199 !!------------------------------------------------------------------- 270 200 NAMELIST/namicedyn/ epsd, alpha, & … … 273 203 !!------------------------------------------------------------------- 274 204 275 ! Define the initial parameters 276 ! ------------------------- 277 278 ! Read Namelist namicedyn 279 REWIND ( numnam_ice ) 205 REWIND ( numnam_ice ) ! Read Namelist namicedyn 280 206 READ ( numnam_ice , namicedyn ) 281 IF(lwp) THEN 207 208 IF(lwp) THEN ! Control print 282 209 WRITE(numout,*) 283 210 WRITE(numout,*) 'lim_dyn_init_2: ice parameters for ice dynamics ' … … 291 218 WRITE(numout,*) ' maximum value for the residual of relaxation resl = ', resl 292 219 WRITE(numout,*) ' drag coefficient for oceanic stress cw = ', cw 293 WRITE(numout,*) ' turning angle for oceanic stress angvg = ', angvg 220 WRITE(numout,*) ' turning angle for oceanic stress angvg = ', angvg, ' degrees' 294 221 WRITE(numout,*) ' first bulk-rheology parameter pstar = ', pstar 295 222 WRITE(numout,*) ' second bulk-rhelogy parameter c_rhg = ', c_rhg … … 303 230 usecc2 = 1.0 / ( ecc * ecc ) 304 231 rhoco = rau0 * cw 305 angvg = angvg * rad 232 angvg = angvg * rad ! convert angvg from degree to radian 306 233 sangvg = SIN( angvg ) 307 234 cangvg = COS( angvg ) 308 235 pstarh = pstar / 2.0 309 sdvt(:,:) = 0.e0 310 311 ! Diffusion coefficients. 312 ahiu(:,:) = ahi0 * umask(:,:,1) 236 ! 237 ahiu(:,:) = ahi0 * umask(:,:,1) ! Ice eddy Diffusivity coefficients. 313 238 ahiv(:,:) = ahi0 * vmask(:,:,1) 314 239 ! 315 240 END SUBROUTINE lim_dyn_init_2 316 241
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