Changeset 5167 for trunk/NEMOGCM/NEMO/LIM_SRC_3/limthd_dh.F90
- Timestamp:
- 2015-03-24T18:35:00+01:00 (9 years ago)
- File:
-
- 1 edited
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trunk/NEMOGCM/NEMO/LIM_SRC_3/limthd_dh.F90 (modified) (27 diffs)
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trunk/NEMOGCM/NEMO/LIM_SRC_3/limthd_dh.F90
r5134 r5167 86 86 REAL(wp) :: zsstK ! SST in Kelvin 87 87 88 REAL(wp), POINTER, DIMENSION(:) :: zh_s ! snow layer thickness89 88 REAL(wp), POINTER, DIMENSION(:) :: zqprec ! energy of fallen snow (J.m-3) 90 89 REAL(wp), POINTER, DIMENSION(:) :: zq_su ! heat for surface ablation (J.m-2) … … 118 117 END SELECT 119 118 120 CALL wrk_alloc( jpij, z h_s, zqprec, zq_su, zq_bo, zf_tt, zq_rema )119 CALL wrk_alloc( jpij, zqprec, zq_su, zq_bo, zf_tt, zq_rema ) 121 120 CALL wrk_alloc( jpij, zdh_s_mel, zdh_s_pre, zdh_s_sub, zqh_i, zqh_s, zq_s ) 122 121 CALL wrk_alloc( jpij, nlay_i+1, zdeltah, zh_i ) … … 129 128 zq_rema(:) = 0._wp 130 129 131 zh_s (:) = 0._wp132 130 zdh_s_pre(:) = 0._wp 133 131 zdh_s_mel(:) = 0._wp … … 140 138 icount (:) = 0 141 139 140 ! Initialize enthalpy at nlay_i+1 141 DO ji = kideb, kiut 142 q_i_1d(ji,nlay_i+1) = 0._wp 143 END DO 144 142 145 ! initialize layer thicknesses and enthalpies 143 146 h_i_old (:,0:nlay_i+1) = 0._wp … … 155 158 ! 156 159 DO ji = kideb, kiut 157 rswitch = 1._wp - MAX( 0._wp , SIGN( 1._wp , - ht_s_1d(ji) ) )158 ztmelts = rswitch * rt0 + ( 1._wp - rswitch ) * rt0159 160 160 zfdum = qns_ice_1d(ji) + ( 1._wp - i0(ji) ) * qsr_ice_1d(ji) - fc_su(ji) 161 161 zf_tt(ji) = fc_bo_i(ji) + fhtur_1d(ji) + fhld_1d(ji) 162 162 163 zq_su (ji) = MAX( 0._wp, zfdum * rdt_ice ) * MAX( 0._wp , SIGN( 1._wp, t_su_1d(ji) - ztmelts) )163 zq_su (ji) = MAX( 0._wp, zfdum * rdt_ice ) * MAX( 0._wp , SIGN( 1._wp, t_su_1d(ji) - rt0 ) ) 164 164 zq_bo (ji) = MAX( 0._wp, zf_tt(ji) * rdt_ice ) 165 165 END DO … … 187 187 !------------------------------------------------------------! 188 188 ! 189 DO ji = kideb, kiut190 zh_s(ji) = ht_s_1d(ji) * r1_nlay_s191 END DO192 !193 189 DO jk = 1, nlay_s 194 190 DO ji = kideb, kiut 195 zqh_s(ji) = zqh_s(ji) + q_s_1d(ji,jk) * zh_s(ji)191 zqh_s(ji) = zqh_s(ji) + q_s_1d(ji,jk) * ht_s_1d(ji) * r1_nlay_s 196 192 END DO 197 193 END DO … … 222 218 ! Martin Vancoppenolle, December 2006 223 219 220 zdeltah(:,:) = 0._wp 224 221 DO ji = kideb, kiut 225 222 !----------- … … 236 233 ! mass flux, <0 237 234 wfx_spr_1d(ji) = wfx_spr_1d(ji) - rhosn * a_i_1d(ji) * zdh_s_pre(ji) * r1_rdtice 238 ! update thickness239 ht_s_1d (ji) = MAX( 0._wp , ht_s_1d(ji) + zdh_s_pre(ji) )240 235 241 236 !--------------------- … … 243 238 !--------------------- 244 239 ! thickness change 245 IF( zdh_s_pre(ji) > 0._wp ) THEN246 240 rswitch = MAX( 0._wp , SIGN( 1._wp , zqprec(ji) - epsi20 ) ) 247 zd h_s_mel (ji) = - rswitch * zq_su(ji) / MAX( zqprec(ji) , epsi20 )248 zd h_s_mel (ji) = MAX( - zdh_s_pre(ji), zdh_s_mel(ji) ) ! bound melting241 zdeltah (ji,1) = - rswitch * zq_su(ji) / MAX( zqprec(ji) , epsi20 ) 242 zdeltah (ji,1) = MAX( - zdh_s_pre(ji), zdeltah(ji,1) ) ! bound melting 249 243 ! heat used to melt snow (W.m-2, >0) 250 hfx_snw_1d(ji) = hfx_snw_1d(ji) - zd h_s_mel(ji) * a_i_1d(ji) * zqprec(ji) * r1_rdtice244 hfx_snw_1d(ji) = hfx_snw_1d(ji) - zdeltah(ji,1) * a_i_1d(ji) * zqprec(ji) * r1_rdtice 251 245 ! snow melting only = water into the ocean (then without snow precip), >0 252 wfx_snw_1d(ji) = wfx_snw_1d(ji) - rhosn * a_i_1d(ji) * zdh_s_mel(ji) * r1_rdtice 253 254 ! updates available heat + thickness 255 zq_su (ji) = MAX( 0._wp , zq_su (ji) + zdh_s_mel(ji) * zqprec(ji) ) 256 ht_s_1d(ji) = MAX( 0._wp , ht_s_1d(ji) + zdh_s_mel(ji) ) 257 zh_s (ji) = ht_s_1d(ji) * r1_nlay_s 258 259 ENDIF 260 END DO 261 262 ! If heat still available, then melt more snow 263 zdeltah(:,:) = 0._wp ! important 246 wfx_snw_1d(ji) = wfx_snw_1d(ji) - rhosn * a_i_1d(ji) * zdeltah(ji,1) * r1_rdtice 247 ! updates available heat + precipitations after melting 248 zq_su (ji) = MAX( 0._wp , zq_su (ji) + zdeltah(ji,1) * zqprec(ji) ) 249 zdh_s_pre (ji) = zdh_s_pre(ji) + zdeltah(ji,1) 250 251 ! update thickness 252 ht_s_1d(ji) = MAX( 0._wp , ht_s_1d(ji) + zdh_s_pre(ji) ) 253 END DO 254 255 ! If heat still available (zq_su > 0), then melt more snow 256 zdeltah(:,:) = 0._wp 264 257 DO jk = 1, nlay_s 265 258 DO ji = kideb, kiut … … 268 261 rswitch = rswitch * ( MAX( 0._wp, SIGN( 1._wp, q_s_1d(ji,jk) - epsi20 ) ) ) 269 262 zdeltah (ji,jk) = - rswitch * zq_su(ji) / MAX( q_s_1d(ji,jk), epsi20 ) 270 zdeltah (ji,jk) = MAX( zdeltah(ji,jk) , - zh_s(ji) ) ! bound melting263 zdeltah (ji,jk) = MAX( zdeltah(ji,jk) , - ht_s_1d(ji) ) ! bound melting 271 264 zdh_s_mel(ji) = zdh_s_mel(ji) + zdeltah(ji,jk) 272 265 ! heat used to melt snow(W.m-2, >0) … … 274 267 ! snow melting only = water into the ocean (then without snow precip) 275 268 wfx_snw_1d(ji) = wfx_snw_1d(ji) - rhosn * a_i_1d(ji) * zdeltah(ji,jk) * r1_rdtice 276 277 269 ! updates available heat + thickness 278 270 zq_su (ji) = MAX( 0._wp , zq_su (ji) + zdeltah(ji,jk) * q_s_1d(ji,jk) ) 279 271 ht_s_1d(ji) = MAX( 0._wp , ht_s_1d(ji) + zdeltah(ji,jk) ) 280 281 272 END DO 282 273 END DO … … 286 277 !---------------------- 287 278 ! qla_ice is always >=0 (upwards), heat goes to the atmosphere, therefore snow sublimates 288 ! clem comment: not counted in mass exchange in limsbc since this is an exchange with atm. (not ocean)279 ! clem comment: not counted in mass/heat exchange in limsbc since this is an exchange with atm. (not ocean) 289 280 ! clem comment: ice should also sublimate 281 zdeltah(:,:) = 0._wp 290 282 IF( lk_cpl ) THEN 291 283 ! coupled mode: sublimation already included in emp_ice (to do in limsbc_ice) … … 294 286 ! forced mode: snow thickness change due to sublimation 295 287 DO ji = kideb, kiut 296 zdh_s_sub(ji) = MAX( - ht_s_1d(ji) , - parsub *qla_ice_1d(ji) / ( rhosn * lsub ) * rdt_ice )288 zdh_s_sub(ji) = MAX( - ht_s_1d(ji) , - qla_ice_1d(ji) / ( rhosn * lsub ) * rdt_ice ) 297 289 ! Heat flux by sublimation [W.m-2], < 0 298 290 ! sublimate first snow that had fallen, then pre-existing snow 299 zcoeff = ( MAX( zdh_s_sub(ji), - MAX( 0._wp, zdh_s_pre(ji) + zdh_s_mel(ji) ) ) * zqprec(ji) + & 300 & ( zdh_s_sub(ji) - MAX( zdh_s_sub(ji), - MAX( 0._wp, zdh_s_pre(ji) + zdh_s_mel(ji) ) ) ) * q_s_1d(ji,1) ) & 301 & * a_i_1d(ji) * r1_rdtice 302 hfx_sub_1d(ji) = hfx_sub_1d(ji) + zcoeff 291 zdeltah(ji,1) = MAX( zdh_s_sub(ji), - zdh_s_pre(ji) ) 292 hfx_sub_1d(ji) = hfx_sub_1d(ji) + ( zdeltah(ji,1) * zqprec(ji) + ( zdh_s_sub(ji) - zdeltah(ji,1) ) * q_s_1d(ji,1) & 293 & ) * a_i_1d(ji) * r1_rdtice 303 294 ! Mass flux by sublimation 304 295 wfx_sub_1d(ji) = wfx_sub_1d(ji) - rhosn * a_i_1d(ji) * zdh_s_sub(ji) * r1_rdtice 305 296 ! new snow thickness 306 ht_s_1d(ji) = MAX( 0._wp , ht_s_1d(ji) + zdh_s_sub(ji) ) 297 ht_s_1d(ji) = MAX( 0._wp , ht_s_1d(ji) + zdh_s_sub(ji) ) 298 ! update precipitations after sublimation and correct sublimation 299 zdh_s_pre(ji) = zdh_s_pre(ji) + zdeltah(ji,1) 300 zdh_s_sub(ji) = zdh_s_sub(ji) - zdeltah(ji,1) 307 301 END DO 308 302 ENDIF … … 310 304 ! --- Update snow diags --- ! 311 305 DO ji = kideb, kiut 312 dh_s_tot(ji) = zdh_s_mel(ji) + zdh_s_pre(ji) + zdh_s_sub(ji) 313 zh_s(ji) = ht_s_1d(ji) * r1_nlay_s 314 END DO ! ji 306 dh_s_tot(ji) = zdh_s_mel(ji) + zdh_s_pre(ji) + zdh_s_sub(ji) 307 END DO 315 308 316 309 !------------------------------------------- … … 323 316 rswitch = MAX( 0._wp , SIGN( 1._wp, ht_s_1d(ji) - epsi20 ) ) 324 317 q_s_1d(ji,jk) = rswitch / MAX( ht_s_1d(ji), epsi20 ) * & 325 & ( ( MAX( 0._wp, dh_s_tot(ji) )) * zqprec(ji) + &326 & ( - MAX( 0._wp, dh_s_tot(ji) ) + ht_s_1d(ji) ) * rhosn * ( cpic * ( rt0 - t_s_1d(ji,jk) ) + lfus ) )318 & ( ( zdh_s_pre(ji) ) * zqprec(ji) + & 319 & ( ht_s_1d(ji) - zdh_s_pre(ji) ) * rhosn * ( cpic * ( rt0 - t_s_1d(ji,jk) ) + lfus ) ) 327 320 zq_s(ji) = zq_s(ji) + q_s_1d(ji,jk) 328 321 END DO … … 334 327 zdeltah(:,:) = 0._wp ! important 335 328 DO jk = 1, nlay_i 336 DO ji = kideb, kiut 337 zEi = - q_i_1d(ji,jk) * r1_rhoic 338 339 ztmelts = - tmut * s_i_1d(ji,jk) + rt0 329 DO ji = kideb, kiut 330 zEi = - q_i_1d(ji,jk) * r1_rhoic ! Specific enthalpy of layer k [J/kg, <0] 331 332 ztmelts = - tmut * s_i_1d(ji,jk) + rt0 ! Melting point of layer k [K] 340 333 341 334 zEw = rcp * ( ztmelts - rt0 ) ! Specific enthalpy of resulting meltwater [J/kg, <0] … … 343 336 zdE = zEi - zEw ! Specific enthalpy difference < 0 344 337 345 zfmdt = - zq_su(ji) / zdE ! Mass flux to the ocean [kg/m2, >0] 338 IF( zdE < 0._wp ) THEN 339 zfmdt = - zq_su(ji) / zdE ! Mass flux to the ocean [kg/m2, >0] 340 ELSE 341 zfmdt = rhoic * zh_i(ji,jk) !!! internal melting 342 zdE = 0._wp ! All the layer melts if t_i(jk) = Tmelt (i.e. zdE = 0) 343 END IF 346 344 347 345 zdeltah(ji,jk) = - zfmdt * r1_rhoic ! Melt of layer jk [m, <0] … … 358 356 359 357 ! Contribution to salt flux (clem: using sm_i_1d and not s_i_1d(jk) is ok) 360 sfx_sum_1d(ji) = sfx_sum_1d(ji) - sm_i_1d(ji) * a_i_1d(ji) * zdeltah(ji,jk) * rhoic* r1_rdtice358 sfx_sum_1d(ji) = sfx_sum_1d(ji) - rhoic * a_i_1d(ji) * zdeltah(ji,jk) * sm_i_1d(ji) * r1_rdtice 361 359 362 360 ! Contribution to heat flux [W.m-2], < 0 … … 405 403 ! -> need for an iterative procedure, which converges quickly 406 404 407 IF ( nn_icesal == 2 ) THEN 408 num_iter_max = 5 409 ELSE 410 num_iter_max = 1 411 ENDIF 412 413 ! Just to be sure that enthalpy at nlay_i+1 is null 414 DO ji = kideb, kiut 415 q_i_1d(ji,nlay_i+1) = 0._wp 416 END DO 405 num_iter_max = 1 406 IF( nn_icesal == 2 ) num_iter_max = 5 417 407 418 408 ! Iterative procedure … … 483 473 484 474 ! Contribution to salt flux, <0 485 sfx_bog_1d(ji) = sfx_bog_1d(ji) + s_i_new(ji) * a_i_1d(ji) * zfmdt* r1_rdtice475 sfx_bog_1d(ji) = sfx_bog_1d(ji) - rhoic * a_i_1d(ji) * dh_i_bott(ji) * s_i_new(ji) * r1_rdtice 486 476 487 477 ! Contribution to mass flux, <0 … … 500 490 DO jk = nlay_i, 1, -1 501 491 DO ji = kideb, kiut 502 IF( zf_tt(ji) > =0._wp .AND. jk > icount(ji) ) THEN ! do not calculate where layer has already disappeared by surface melting492 IF( zf_tt(ji) > 0._wp .AND. jk > icount(ji) ) THEN ! do not calculate where layer has already disappeared by surface melting 503 493 504 494 ztmelts = - tmut * s_i_1d(ji,jk) + rt0 ! Melting point of layer jk (K) … … 524 514 525 515 ! Contribution to salt flux (clem: using sm_i_1d and not s_i_1d(jk) is ok) 526 sfx_res_1d(ji) = sfx_res_1d(ji) - sm_i_1d(ji) * a_i_1d(ji) * zdeltah(ji,jk) * rhoic* r1_rdtice516 sfx_res_1d(ji) = sfx_res_1d(ji) - rhoic * a_i_1d(ji) * zdeltah(ji,jk) * sm_i_1d(ji) * r1_rdtice 527 517 528 518 ! Contribution to mass flux … … 559 549 560 550 ! Contribution to salt flux (clem: using sm_i_1d and not s_i_1d(jk) is ok) 561 sfx_bom_1d(ji) = sfx_bom_1d(ji) - sm_i_1d(ji) * a_i_1d(ji) * zdeltah(ji,jk) * rhoic* r1_rdtice551 sfx_bom_1d(ji) = sfx_bom_1d(ji) - rhoic * a_i_1d(ji) * zdeltah(ji,jk) * sm_i_1d(ji) * r1_rdtice 562 552 563 553 ! Total heat flux used in this process [W.m-2], >0 … … 595 585 zdeltah (ji,1) = - rswitch * zq_rema(ji) / MAX( q_s_1d(ji,1), epsi20 ) 596 586 zdeltah (ji,1) = MIN( 0._wp , MAX( zdeltah(ji,1) , - ht_s_1d(ji) ) ) ! bound melting 597 zdh_s_mel(ji) = zdh_s_mel(ji) + zdeltah(ji,1)598 587 dh_s_tot (ji) = dh_s_tot(ji) + zdeltah(ji,1) 599 588 ht_s_1d (ji) = ht_s_1d(ji) + zdeltah(ji,1) … … 622 611 dh_snowice(ji) = MAX( 0._wp , ( rhosn * ht_s_1d(ji) + (rhoic-rau0) * ht_i_1d(ji) ) / ( rhosn+rau0-rhoic ) ) 623 612 624 ht_i_1d(ji) 625 ht_s_1d(ji) 613 ht_i_1d(ji) = ht_i_1d(ji) + dh_snowice(ji) 614 ht_s_1d(ji) = ht_s_1d(ji) - dh_snowice(ji) 626 615 627 616 ! Salinity of snow ice … … 669 658 ! Update temperature, energy 670 659 !------------------------------------------- 671 !clem bug: we should take snow into account here672 660 DO ji = kideb, kiut 673 661 rswitch = 1.0 - MAX( 0._wp , SIGN( 1._wp , - ht_i_1d(ji) ) ) … … 688 676 WHERE( ht_i_1d == 0._wp ) a_i_1d = 0._wp 689 677 690 CALL wrk_dealloc( jpij, z h_s, zqprec, zq_su, zq_bo, zf_tt, zq_rema )678 CALL wrk_dealloc( jpij, zqprec, zq_su, zq_bo, zf_tt, zq_rema ) 691 679 CALL wrk_dealloc( jpij, zdh_s_mel, zdh_s_pre, zdh_s_sub, zqh_i, zqh_s, zq_s ) 692 680 CALL wrk_dealloc( jpij, nlay_i+1, zdeltah, zh_i )
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