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- 2015-07-10T13:28:53+02:00 (9 years ago)
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branches/2014/dev_r4765_CNRS_agrif/NEMOGCM/NEMO/OPA_SRC/SBC/sbcblk_core.F90
r4689 r5581 5 5 !!===================================================================== 6 6 !! History : 1.0 ! 2004-08 (U. Schweckendiek) Original code 7 !! 2.0 ! 2005-04 (L. Brodeau, A.M. Treguier) additions: 7 !! 2.0 ! 2005-04 (L. Brodeau, A.M. Treguier) additions: 8 8 !! - new bulk routine for efficiency 9 9 !! - WINDS ARE NOW ASSUMED TO BE AT T POINTS in input files !!!! 10 !! - file names and file characteristics in namelist 11 !! - Implement reading of 6-hourly fields 12 !! 3.0 ! 2006-06 (G. Madec) sbc rewritting 13 !! - ! 2006-12 (L. Brodeau) Original code for TURB_CORE_2Z10 !! - file names and file characteristics in namelist 11 !! - Implement reading of 6-hourly fields 12 !! 3.0 ! 2006-06 (G. Madec) sbc rewritting 13 !! - ! 2006-12 (L. Brodeau) Original code for turb_core_2z 14 14 !! 3.2 ! 2009-04 (B. Lemaire) Introduce iom_put 15 15 !! 3.3 ! 2010-10 (S. Masson) add diurnal cycle 16 16 !! 3.4 ! 2011-11 (C. Harris) Fill arrays required by CICE 17 !! 3.7 ! 2014-06 (L. Brodeau) simplification and optimization of CORE bulk 17 18 !!---------------------------------------------------------------------- 18 19 19 20 !!---------------------------------------------------------------------- 20 !! sbc_blk_core : bulk formulation as ocean surface boundary condition 21 !! (forced mode, CORE bulk formulea) 22 !! blk_oce_core : ocean: computes momentum, heat and freshwater fluxes 23 !! blk_ice_core : ice : computes momentum, heat and freshwater fluxes 24 !! turb_core : computes the CORE turbulent transfer coefficients 21 !! sbc_blk_core : bulk formulation as ocean surface boundary condition (forced mode, CORE bulk formulea) 22 !! blk_oce_core : computes momentum, heat and freshwater fluxes over ocean 23 !! blk_ice_core : computes momentum, heat and freshwater fluxes over ice 24 !! turb_core_2z : Computes turbulent transfert coefficients 25 !! cd_neutral_10m : Estimate of the neutral drag coefficient at 10m 26 !! psi_m : universal profile stability function for momentum 27 !! psi_h : universal profile stability function for temperature and humidity 25 28 !!---------------------------------------------------------------------- 26 29 USE oce ! ocean dynamics and tracers … … 38 41 USE lbclnk ! ocean lateral boundary conditions (or mpp link) 39 42 USE prtctl ! Print control 40 USE sbcwave,ONLY : cdn_wave !wave module 41 #if defined key_lim3 || defined key_cice 43 USE sbcwave, ONLY : cdn_wave ! wave module 42 44 USE sbc_ice ! Surface boundary condition: ice fields 45 USE lib_fortran ! to use key_nosignedzero 46 #if defined key_lim3 47 USE ice, ONLY : u_ice, v_ice, jpl, pfrld, a_i_b 48 USE limthd_dh ! for CALL lim_thd_snwblow 49 #elif defined key_lim2 50 USE ice_2, ONLY : u_ice, v_ice 51 USE par_ice_2 43 52 #endif 44 USE lib_fortran ! to use key_nosignedzero45 53 46 54 IMPLICIT NONE … … 48 56 49 57 PUBLIC sbc_blk_core ! routine called in sbcmod module 50 PUBLIC blk_ice_core ! routine called in sbc_ice_lim module 51 PUBLIC blk_ice_meanqsr ! routine called in sbc_ice_lim module 58 #if defined key_lim2 || defined key_lim3 59 PUBLIC blk_ice_core_tau ! routine called in sbc_ice_lim module 60 PUBLIC blk_ice_core_flx ! routine called in sbc_ice_lim module 61 #endif 52 62 PUBLIC turb_core_2z ! routine calles in sbcblk_mfs module 53 63 54 INTEGER , PARAMETER :: jpfld = 9 ! maximum number of files to read 64 INTEGER , PARAMETER :: jpfld = 9 ! maximum number of files to read 55 65 INTEGER , PARAMETER :: jp_wndi = 1 ! index of 10m wind velocity (i-component) (m/s) at T-point 56 66 INTEGER , PARAMETER :: jp_wndj = 2 ! index of 10m wind velocity (j-component) (m/s) at T-point … … 62 72 INTEGER , PARAMETER :: jp_snow = 8 ! index of snow (solid prcipitation) (kg/m2/s) 63 73 INTEGER , PARAMETER :: jp_tdif = 9 ! index of tau diff associated to HF tau (N/m2) at T-point 64 74 65 75 TYPE(FLD), ALLOCATABLE, DIMENSION(:) :: sf ! structure of input fields (file informations, fields read) 66 76 67 77 ! !!! CORE bulk parameters 68 78 REAL(wp), PARAMETER :: rhoa = 1.22 ! air density … … 75 85 76 86 ! !!* Namelist namsbc_core : CORE bulk parameters 77 LOGICAL :: ln_2m ! logical flag for height of air temp. and hum78 87 LOGICAL :: ln_taudif ! logical flag to use the "mean of stress module - module of mean stress" data 79 88 REAL(wp) :: rn_pfac ! multiplication factor for precipitation 80 89 REAL(wp) :: rn_efac ! multiplication factor for evaporation (clem) 81 90 REAL(wp) :: rn_vfac ! multiplication factor for ice/ocean velocity in the calculation of wind stress (clem) 82 LOGICAL :: ln_bulk2z ! logical flag for case where z(q,t) and z(u) are specified in the namelist83 91 REAL(wp) :: rn_zqt ! z(q,t) : height of humidity and temperature measurements 84 92 REAL(wp) :: rn_zu ! z(u) : height of wind measurements … … 88 96 # include "vectopt_loop_substitute.h90" 89 97 !!---------------------------------------------------------------------- 90 !! NEMO/OPA 3. 3 , NEMO-consortium (2010)98 !! NEMO/OPA 3.7 , NEMO-consortium (2014) 91 99 !! $Id$ 92 100 !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) … … 97 105 !!--------------------------------------------------------------------- 98 106 !! *** ROUTINE sbc_blk_core *** 99 !! 107 !! 100 108 !! ** Purpose : provide at each time step the surface ocean fluxes 101 !! (momentum, heat, freshwater and runoff) 109 !! (momentum, heat, freshwater and runoff) 102 110 !! 103 111 !! ** Method : (1) READ each fluxes in NetCDF files: … … 118 126 !! ** Action : defined at each time-step at the air-sea interface 119 127 !! - utau, vtau i- and j-component of the wind stress 120 !! - taum, wndm wind stress and 10m wind modules at T-point 128 !! - taum wind stress module at T-point 129 !! - wndm wind speed module at T-point over free ocean or leads in presence of sea-ice 121 130 !! - qns, qsr non-solar and solar heat fluxes 122 131 !! - emp upward mass flux (evapo. - precip.) 123 132 !! - sfx salt flux due to freezing/melting (non-zero only if ice is present) 124 133 !! (set in limsbc(_2).F90) 134 !! 135 !! ** References : Large & Yeager, 2004 / Large & Yeager, 2008 136 !! Brodeau et al. Ocean Modelling 2010 125 137 !!---------------------------------------------------------------------- 126 138 INTEGER, INTENT(in) :: kt ! ocean time step 127 ! !139 ! 128 140 INTEGER :: ierror ! return error code 129 141 INTEGER :: ifpr ! dummy loop indice 130 142 INTEGER :: jfld ! dummy loop arguments 131 143 INTEGER :: ios ! Local integer output status for namelist read 132 ! !144 ! 133 145 CHARACTER(len=100) :: cn_dir ! Root directory for location of core files 134 146 TYPE(FLD_N), DIMENSION(jpfld) :: slf_i ! array of namelist informations on the fields to read … … 136 148 TYPE(FLD_N) :: sn_qlw , sn_tair, sn_prec, sn_snow ! " " 137 149 TYPE(FLD_N) :: sn_tdif ! " " 138 NAMELIST/namsbc_core/ cn_dir , ln_ 2m , ln_taudif, rn_pfac, rn_efac, rn_vfac, &150 NAMELIST/namsbc_core/ cn_dir , ln_taudif, rn_pfac, rn_efac, rn_vfac, & 139 151 & sn_wndi, sn_wndj, sn_humi , sn_qsr , & 140 152 & sn_qlw , sn_tair, sn_prec , sn_snow, & 141 & sn_tdif, rn_zqt , ln_bulk2z,rn_zu142 !!--------------------------------------------------------------------- 143 153 & sn_tdif, rn_zqt, rn_zu 154 !!--------------------------------------------------------------------- 155 ! 144 156 ! ! ====================== ! 145 157 IF( kt == nit000 ) THEN ! First call kt=nit000 ! … … 149 161 READ ( numnam_ref, namsbc_core, IOSTAT = ios, ERR = 901) 150 162 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_core in reference namelist', lwp ) 151 163 ! 152 164 REWIND( numnam_cfg ) ! Namelist namsbc_core in configuration namelist : CORE bulk parameters 153 165 READ ( numnam_cfg, namsbc_core, IOSTAT = ios, ERR = 902 ) 154 166 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsbc_core in configuration namelist', lwp ) 155 167 156 IF(lwm) WRITE 168 IF(lwm) WRITE( numond, namsbc_core ) 157 169 ! ! check: do we plan to use ln_dm2dc with non-daily forcing? 158 IF( ln_dm2dc .AND. sn_qsr%nfreqh /= 24 ) & 159 & CALL ctl_stop( 'sbc_blk_core: ln_dm2dc can be activated only with daily short-wave forcing' ) 170 IF( ln_dm2dc .AND. sn_qsr%nfreqh /= 24 ) & 171 & CALL ctl_stop( 'sbc_blk_core: ln_dm2dc can be activated only with daily short-wave forcing' ) 160 172 IF( ln_dm2dc .AND. sn_qsr%ln_tint ) THEN 161 173 CALL ctl_warn( 'sbc_blk_core: ln_dm2dc is taking care of the temporal interpolation of daily qsr', & 162 174 & ' ==> We force time interpolation = .false. for qsr' ) 163 175 sn_qsr%ln_tint = .false. 164 176 ENDIF … … 169 181 slf_i(jp_prec) = sn_prec ; slf_i(jp_snow) = sn_snow 170 182 slf_i(jp_tdif) = sn_tdif 171 ! 183 ! 172 184 lhftau = ln_taudif ! do we use HF tau information? 173 185 jfld = jpfld - COUNT( (/.NOT. lhftau/) ) … … 190 202 ! ! compute the surface ocean fluxes using CORE bulk formulea 191 203 IF( MOD( kt - 1, nn_fsbc ) == 0 ) CALL blk_oce_core( kt, sf, sst_m, ssu_m, ssv_m ) 192 193 ! If diurnal cycle is activated, compute a daily mean short waves flux for biogeochemistery194 IF( ltrcdm2dc ) CALL blk_bio_meanqsr195 204 196 205 #if defined key_cice … … 226 235 !! - qsr : Solar heat flux over the ocean (W/m2) 227 236 !! - qns : Non Solar heat flux over the ocean (W/m2) 228 !! - evap : Evaporation over the ocean (kg/m2/s)229 237 !! - emp : evaporation minus precipitation (kg/m2/s) 230 238 !! … … 269 277 zwnd_j(:,:) = 0.e0 270 278 #if defined key_cyclone 271 # if defined key_vectopt_loop 272 !CDIR COLLAPSE 273 # endif 274 CALL wnd_cyc( kt, zwnd_i, zwnd_j ) ! add Manu ! 279 CALL wnd_cyc( kt, zwnd_i, zwnd_j ) ! add analytical tropical cyclone (Vincent et al. JGR 2012) 275 280 DO jj = 2, jpjm1 276 281 DO ji = fs_2, fs_jpim1 ! vect. opt. … … 279 284 END DO 280 285 END DO 281 #endif282 #if defined key_vectopt_loop283 !CDIR COLLAPSE284 286 #endif 285 287 DO jj = 2, jpjm1 … … 292 294 CALL lbc_lnk( zwnd_j(:,:) , 'T', -1. ) 293 295 ! ... scalar wind ( = | U10m - U_oce | ) at T-point (masked) 294 !CDIR NOVERRCHK295 !CDIR COLLAPSE296 296 wndm(:,:) = SQRT( zwnd_i(:,:) * zwnd_i(:,:) & 297 297 & + zwnd_j(:,:) * zwnd_j(:,:) ) * tmask(:,:,1) … … 300 300 ! I Radiative FLUXES ! 301 301 ! ----------------------------------------------------------------------------- ! 302 302 303 303 ! ocean albedo assumed to be constant + modify now Qsr to include the diurnal cycle ! Short Wave 304 304 zztmp = 1. - albo … … 306 306 ELSE ; qsr(:,:) = zztmp * sf(jp_qsr)%fnow(:,:,1) * tmask(:,:,1) 307 307 ENDIF 308 !CDIR COLLAPSE 308 309 309 zqlw(:,:) = ( sf(jp_qlw)%fnow(:,:,1) - Stef * zst(:,:)*zst(:,:)*zst(:,:)*zst(:,:) ) * tmask(:,:,1) ! Long Wave 310 310 ! ----------------------------------------------------------------------------- ! … … 313 313 314 314 ! ... specific humidity at SST and IST 315 !CDIR NOVERRCHK 316 !CDIR COLLAPSE 317 zqsatw(:,:) = zcoef_qsatw * EXP( -5107.4 / zst(:,:) ) 315 zqsatw(:,:) = zcoef_qsatw * EXP( -5107.4 / zst(:,:) ) 318 316 319 317 ! ... NCAR Bulk formulae, computation of Cd, Ch, Ce at T-point : 320 IF( ln_2m ) THEN 321 !! If air temp. and spec. hum. are given at different height (2m) than wind (10m) : 322 CALL TURB_CORE_2Z(2.,10., zst , sf(jp_tair)%fnow, & 323 & zqsatw, sf(jp_humi)%fnow, wndm, & 324 & Cd , Ch , Ce , & 325 & zt_zu , zq_zu ) 326 ELSE IF( ln_bulk2z ) THEN 327 !! If the height of the air temp./spec. hum. and wind are to be specified by hand : 328 IF( rn_zqt == rn_zu ) THEN 329 !! If air temp. and spec. hum. are at the same height as wind : 330 CALL TURB_CORE_1Z( rn_zu, zst , sf(jp_tair)%fnow(:,:,1), & 331 & zqsatw, sf(jp_humi)%fnow(:,:,1), wndm, & 332 & Cd , Ch , Ce ) 333 ELSE 334 !! If air temp. and spec. hum. are at a different height to wind : 335 CALL TURB_CORE_2Z(rn_zqt, rn_zu , zst , sf(jp_tair)%fnow, & 336 & zqsatw, sf(jp_humi)%fnow, wndm, & 337 & Cd , Ch , Ce , & 338 & zt_zu , zq_zu ) 339 ENDIF 340 ELSE 341 !! If air temp. and spec. hum. are given at same height than wind (10m) : 342 !gm bug? at the compiling phase, add a copy in temporary arrays... ==> check perf 343 ! CALL TURB_CORE_1Z( 10., zst (:,:), sf(jp_tair)%fnow(:,:), & 344 ! & zqsatw(:,:), sf(jp_humi)%fnow(:,:), wndm(:,:), & 345 ! & Cd (:,:), Ch (:,:), Ce (:,:) ) 346 !gm bug 347 ! ARPDBG - this won't compile with gfortran. Fix but check performance 348 ! as per comment above. 349 CALL TURB_CORE_1Z( 10., zst , sf(jp_tair)%fnow(:,:,1), & 350 & zqsatw, sf(jp_humi)%fnow(:,:,1), wndm, & 351 & Cd , Ch , Ce ) 352 ENDIF 353 318 CALL turb_core_2z( rn_zqt, rn_zu, zst, sf(jp_tair)%fnow, zqsatw, sf(jp_humi)%fnow, wndm, & 319 & Cd, Ch, Ce, zt_zu, zq_zu ) 320 354 321 ! ... tau module, i and j component 355 322 DO jj = 1, jpj … … 363 330 364 331 ! ... add the HF tau contribution to the wind stress module? 365 IF( lhftau ) THEN 366 !CDIR COLLAPSE 332 IF( lhftau ) THEN 367 333 taum(:,:) = taum(:,:) + sf(jp_tdif)%fnow(:,:,1) 368 334 ENDIF … … 371 337 ! ... utau, vtau at U- and V_points, resp. 372 338 ! Note the use of 0.5*(2-umask) in order to unmask the stress along coastlines 339 ! Note the use of MAX(tmask(i,j),tmask(i+1,j) is to mask tau over ice shelves 373 340 DO jj = 1, jpjm1 374 341 DO ji = 1, fs_jpim1 375 utau(ji,jj) = 0.5 * ( 2. - umask(ji,jj,1) ) * ( zwnd_i(ji,jj) + zwnd_i(ji+1,jj ) ) 376 vtau(ji,jj) = 0.5 * ( 2. - vmask(ji,jj,1) ) * ( zwnd_j(ji,jj) + zwnd_j(ji ,jj+1) ) 342 utau(ji,jj) = 0.5 * ( 2. - umask(ji,jj,1) ) * ( zwnd_i(ji,jj) + zwnd_i(ji+1,jj ) ) & 343 & * MAX(tmask(ji,jj,1),tmask(ji+1,jj,1)) 344 vtau(ji,jj) = 0.5 * ( 2. - vmask(ji,jj,1) ) * ( zwnd_j(ji,jj) + zwnd_j(ji ,jj+1) ) & 345 & * MAX(tmask(ji,jj,1),tmask(ji,jj+1,1)) 377 346 END DO 378 347 END DO … … 380 349 CALL lbc_lnk( vtau(:,:), 'V', -1. ) 381 350 351 382 352 ! Turbulent fluxes over ocean 383 353 ! ----------------------------- 384 IF( ln_2m .OR. ( ln_bulk2z .AND. rn_zqt /= rn_zu )) THEN385 ! Values of temp. and hum. adjusted to height of wind must be used386 zevap(:,:) = rn_efac * MAX( 0.e0, rhoa *Ce(:,:)*( zqsatw(:,:) - zq_zu(:,:) ) * wndm(:,:) )! Evaporation387 zqsb (:,:) = rhoa*cpa*Ch(:,:)*( zst (:,:) - zt_zu(:,:) ) * wndm(:,:)! Sensible Heat354 IF( ABS( rn_zu - rn_zqt) < 0.01_wp ) THEN 355 !! q_air and t_air are (or "are almost") given at 10m (wind reference height) 356 zevap(:,:) = rn_efac*MAX( 0._wp, rhoa*Ce(:,:)*( zqsatw(:,:) - sf(jp_humi)%fnow(:,:,1) )*wndm(:,:) ) ! Evaporation 357 zqsb (:,:) = cpa*rhoa*Ch(:,:)*( zst (:,:) - sf(jp_tair)%fnow(:,:,1) )*wndm(:,:) ! Sensible Heat 388 358 ELSE 389 !CDIR COLLAPSE 390 zevap(:,:) = rn_efac * MAX( 0.e0, rhoa *Ce(:,:)*( zqsatw(:,:) - sf(jp_humi)%fnow(:,:,1) ) * wndm(:,:) ) ! Evaporation 391 !CDIR COLLAPSE 392 zqsb (:,:) = rhoa*cpa*Ch(:,:)*( zst (:,:) - sf(jp_tair)%fnow(:,:,1) ) * wndm(:,:) ! Sensible Heat 393 ENDIF 394 !CDIR COLLAPSE 359 !! q_air and t_air are not given at 10m (wind reference height) 360 ! Values of temp. and hum. adjusted to height of wind during bulk algorithm iteration must be used!!! 361 zevap(:,:) = rn_efac*MAX( 0._wp, rhoa*Ce(:,:)*( zqsatw(:,:) - zq_zu(:,:) )*wndm(:,:) ) ! Evaporation 362 zqsb (:,:) = cpa*rhoa*Ch(:,:)*( zst (:,:) - zt_zu(:,:) )*wndm(:,:) ! Sensible Heat 363 ENDIF 395 364 zqla (:,:) = Lv * zevap(:,:) ! Latent Heat 396 365 … … 409 378 ! III Total FLUXES ! 410 379 ! ----------------------------------------------------------------------------- ! 411 412 !CDIR COLLAPSE 380 ! 413 381 emp (:,:) = ( zevap(:,:) & ! mass flux (evap. - precip.) 414 382 & - sf(jp_prec)%fnow(:,:,1) * rn_pfac ) * tmask(:,:,1) 415 !CDIR COLLAPSE 416 qns(:,:) = zqlw(:,:) - zqsb(:,:) - zqla(:,:) & ! Downward Non Solar flux383 ! 384 qns(:,:) = zqlw(:,:) - zqsb(:,:) - zqla(:,:) & ! Downward Non Solar 417 385 & - sf(jp_snow)%fnow(:,:,1) * rn_pfac * lfus & ! remove latent melting heat for solid precip 418 386 & - zevap(:,:) * pst(:,:) * rcp & ! remove evap heat content at SST 419 387 & + ( sf(jp_prec)%fnow(:,:,1) - sf(jp_snow)%fnow(:,:,1) ) * rn_pfac & ! add liquid precip heat content at Tair 420 & * ( sf(jp_tair)%fnow(:,:,1) - rt0 ) * rcp & 388 & * ( sf(jp_tair)%fnow(:,:,1) - rt0 ) * rcp & 421 389 & + sf(jp_snow)%fnow(:,:,1) * rn_pfac & ! add solid precip heat content at min(Tair,Tsnow) 422 & * ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic 423 ! 424 CALL iom_put( "qlw_oce", zqlw ) ! output downward longwave heat over the ocean 425 CALL iom_put( "qsb_oce", - zqsb ) ! output downward sensible heat over the ocean 426 CALL iom_put( "qla_oce", - zqla ) ! output downward latent heat over the ocean 427 CALL iom_put( "qhc_oce", qns-zqlw+zqsb+zqla ) ! output downward heat content of E-P over the ocean 428 CALL iom_put( "qns_oce", qns ) ! output downward non solar heat over the ocean 390 & * ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) 391 ! 392 #if defined key_lim3 393 qns_oce(:,:) = zqlw(:,:) - zqsb(:,:) - zqla(:,:) ! non solar without emp (only needed by LIM3) 394 qsr_oce(:,:) = qsr(:,:) 395 #endif 396 ! 397 IF ( nn_ice == 0 ) THEN 398 CALL iom_put( "qlw_oce" , zqlw ) ! output downward longwave heat over the ocean 399 CALL iom_put( "qsb_oce" , - zqsb ) ! output downward sensible heat over the ocean 400 CALL iom_put( "qla_oce" , - zqla ) ! output downward latent heat over the ocean 401 CALL iom_put( "qemp_oce", qns-zqlw+zqsb+zqla ) ! output downward heat content of E-P over the ocean 402 CALL iom_put( "qns_oce" , qns ) ! output downward non solar heat over the ocean 403 CALL iom_put( "qsr_oce" , qsr ) ! output downward solar heat over the ocean 404 CALL iom_put( "qt_oce" , qns+qsr ) ! output total downward heat over the ocean 405 ENDIF 429 406 ! 430 407 IF(ln_ctl) THEN … … 442 419 ! 443 420 END SUBROUTINE blk_oce_core 444 445 SUBROUTINE blk_bio_meanqsr446 !!---------------------------------------------------------------------447 !! *** ROUTINE blk_bio_meanqsr448 !!449 !! ** Purpose : provide daily qsr_mean for PISCES when450 !! analytic diurnal cycle is applied in physic451 !!452 !! ** Method : add part where there is no ice453 !!454 !!---------------------------------------------------------------------455 IF( nn_timing == 1 ) CALL timing_start('blk_bio_meanqsr')456 457 qsr_mean(:,:) = (1. - albo ) * sf(jp_qsr)%fnow(:,:,1)458 459 IF( nn_timing == 1 ) CALL timing_stop('blk_bio_meanqsr')460 461 END SUBROUTINE blk_bio_meanqsr462 421 463 464 SUBROUTINE blk_ice_meanqsr(palb,p_qsr_mean,pdim) 465 !!--------------------------------------------------------------------- 466 !! 467 !! ** Purpose : provide the daily qsr_mean over sea_ice for PISCES when 468 !! analytic diurnal cycle is applied in physic 469 !! 470 !! ** Method : compute qsr 471 !! 472 !!--------------------------------------------------------------------- 473 REAL(wp), DIMENSION(:,:,:), INTENT(in ) :: palb ! ice albedo (clear sky) (alb_ice_cs) [%] 474 REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qsr_mean ! solar heat flux over ice (T-point) [W/m2] 475 INTEGER , INTENT(in ) :: pdim ! number of ice categories 476 !! 477 INTEGER :: ijpl ! number of ice categories (size of 3rd dim of input arrays) 478 INTEGER :: ji, jj, jl ! dummy loop indices 479 REAL(wp) :: zztmp ! temporary variable 480 !!--------------------------------------------------------------------- 481 IF( nn_timing == 1 ) CALL timing_start('blk_ice_meanqsr') 482 ! 483 ijpl = pdim ! number of ice categories 484 zztmp = 1. / ( 1. - albo ) 485 ! ! ========================== ! 486 DO jl = 1, ijpl ! Loop over ice categories ! 487 ! ! ========================== ! 488 DO jj = 1 , jpj 489 DO ji = 1, jpi 490 p_qsr_mean(ji,jj,jl) = zztmp * ( 1. - palb(ji,jj,jl) ) * qsr_mean(ji,jj) 422 423 #if defined key_lim2 || defined key_lim3 424 SUBROUTINE blk_ice_core_tau 425 !!--------------------------------------------------------------------- 426 !! *** ROUTINE blk_ice_core_tau *** 427 !! 428 !! ** Purpose : provide the surface boundary condition over sea-ice 429 !! 430 !! ** Method : compute momentum using CORE bulk 431 !! formulea, ice variables and read atmospheric fields. 432 !! NB: ice drag coefficient is assumed to be a constant 433 !!--------------------------------------------------------------------- 434 INTEGER :: ji, jj ! dummy loop indices 435 REAL(wp) :: zcoef_wnorm, zcoef_wnorm2 436 REAL(wp) :: zwnorm_f, zwndi_f , zwndj_f ! relative wind module and components at F-point 437 REAL(wp) :: zwndi_t , zwndj_t ! relative wind components at T-point 438 !!--------------------------------------------------------------------- 439 ! 440 IF( nn_timing == 1 ) CALL timing_start('blk_ice_core_tau') 441 ! 442 ! local scalars ( place there for vector optimisation purposes) 443 zcoef_wnorm = rhoa * Cice 444 zcoef_wnorm2 = rhoa * Cice * 0.5 445 446 !!gm brutal.... 447 utau_ice (:,:) = 0._wp 448 vtau_ice (:,:) = 0._wp 449 wndm_ice (:,:) = 0._wp 450 !!gm end 451 452 ! ----------------------------------------------------------------------------- ! 453 ! Wind components and module relative to the moving ocean ( U10m - U_ice ) ! 454 ! ----------------------------------------------------------------------------- ! 455 SELECT CASE( cp_ice_msh ) 456 CASE( 'I' ) ! B-grid ice dynamics : I-point (i.e. F-point with sea-ice indexation) 457 ! and scalar wind at T-point ( = | U10m - U_ice | ) (masked) 458 DO jj = 2, jpjm1 459 DO ji = 2, jpim1 ! B grid : NO vector opt 460 ! ... scalar wind at I-point (fld being at T-point) 461 zwndi_f = 0.25 * ( sf(jp_wndi)%fnow(ji-1,jj ,1) + sf(jp_wndi)%fnow(ji ,jj ,1) & 462 & + sf(jp_wndi)%fnow(ji-1,jj-1,1) + sf(jp_wndi)%fnow(ji ,jj-1,1) ) - rn_vfac * u_ice(ji,jj) 463 zwndj_f = 0.25 * ( sf(jp_wndj)%fnow(ji-1,jj ,1) + sf(jp_wndj)%fnow(ji ,jj ,1) & 464 & + sf(jp_wndj)%fnow(ji-1,jj-1,1) + sf(jp_wndj)%fnow(ji ,jj-1,1) ) - rn_vfac * v_ice(ji,jj) 465 zwnorm_f = zcoef_wnorm * SQRT( zwndi_f * zwndi_f + zwndj_f * zwndj_f ) 466 ! ... ice stress at I-point 467 utau_ice(ji,jj) = zwnorm_f * zwndi_f 468 vtau_ice(ji,jj) = zwnorm_f * zwndj_f 469 ! ... scalar wind at T-point (fld being at T-point) 470 zwndi_t = sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.25 * ( u_ice(ji,jj+1) + u_ice(ji+1,jj+1) & 471 & + u_ice(ji,jj ) + u_ice(ji+1,jj ) ) 472 zwndj_t = sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.25 * ( v_ice(ji,jj+1) + v_ice(ji+1,jj+1) & 473 & + v_ice(ji,jj ) + v_ice(ji+1,jj ) ) 474 wndm_ice(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1) 491 475 END DO 492 476 END DO 493 END DO 494 ! 495 IF( nn_timing == 1 ) CALL timing_stop('blk_ice_meanqsr') 496 ! 497 END SUBROUTINE blk_ice_meanqsr 498 499 500 SUBROUTINE blk_ice_core( pst , pui , pvi , palb , & 501 & p_taui, p_tauj, p_qns , p_qsr, & 502 & p_qla , p_dqns, p_dqla, & 503 & p_tpr , p_spr , & 504 & p_fr1 , p_fr2 , cd_grid, pdim ) 505 !!--------------------------------------------------------------------- 506 !! *** ROUTINE blk_ice_core *** 477 CALL lbc_lnk( utau_ice, 'I', -1. ) 478 CALL lbc_lnk( vtau_ice, 'I', -1. ) 479 CALL lbc_lnk( wndm_ice, 'T', 1. ) 480 ! 481 CASE( 'C' ) ! C-grid ice dynamics : U & V-points (same as ocean) 482 DO jj = 2, jpj 483 DO ji = fs_2, jpi ! vect. opt. 484 zwndi_t = ( sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( u_ice(ji-1,jj ) + u_ice(ji,jj) ) ) 485 zwndj_t = ( sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( v_ice(ji ,jj-1) + v_ice(ji,jj) ) ) 486 wndm_ice(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1) 487 END DO 488 END DO 489 DO jj = 2, jpjm1 490 DO ji = fs_2, fs_jpim1 ! vect. opt. 491 utau_ice(ji,jj) = zcoef_wnorm2 * ( wndm_ice(ji+1,jj ) + wndm_ice(ji,jj) ) & 492 & * ( 0.5 * (sf(jp_wndi)%fnow(ji+1,jj,1) + sf(jp_wndi)%fnow(ji,jj,1) ) - rn_vfac * u_ice(ji,jj) ) 493 vtau_ice(ji,jj) = zcoef_wnorm2 * ( wndm_ice(ji,jj+1 ) + wndm_ice(ji,jj) ) & 494 & * ( 0.5 * (sf(jp_wndj)%fnow(ji,jj+1,1) + sf(jp_wndj)%fnow(ji,jj,1) ) - rn_vfac * v_ice(ji,jj) ) 495 END DO 496 END DO 497 CALL lbc_lnk( utau_ice, 'U', -1. ) 498 CALL lbc_lnk( vtau_ice, 'V', -1. ) 499 CALL lbc_lnk( wndm_ice, 'T', 1. ) 500 ! 501 END SELECT 502 503 IF(ln_ctl) THEN 504 CALL prt_ctl(tab2d_1=utau_ice , clinfo1=' blk_ice_core: utau_ice : ', tab2d_2=vtau_ice , clinfo2=' vtau_ice : ') 505 CALL prt_ctl(tab2d_1=wndm_ice , clinfo1=' blk_ice_core: wndm_ice : ') 506 ENDIF 507 508 IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core_tau') 509 510 END SUBROUTINE blk_ice_core_tau 511 512 513 SUBROUTINE blk_ice_core_flx( ptsu, palb ) 514 !!--------------------------------------------------------------------- 515 !! *** ROUTINE blk_ice_core_flx *** 507 516 !! 508 517 !! ** Purpose : provide the surface boundary condition over sea-ice 509 518 !! 510 !! ** Method : compute momentum,heat and freshwater exchanged519 !! ** Method : compute heat and freshwater exchanged 511 520 !! between atmosphere and sea-ice using CORE bulk 512 521 !! formulea, ice variables and read atmmospheric fields. 513 !! NB: ice drag coefficient is assumed to be a constant514 522 !! 515 523 !! caution : the net upward water flux has with mm/day unit 516 524 !!--------------------------------------------------------------------- 517 REAL(wp), DIMENSION(:,:,:), INTENT(in ) :: pst ! ice surface temperature (>0, =rt0 over land) [Kelvin] 518 REAL(wp), DIMENSION(:,:) , INTENT(in ) :: pui ! ice surface velocity (i- and i- components [m/s] 519 REAL(wp), DIMENSION(:,:) , INTENT(in ) :: pvi ! at I-point (B-grid) or U & V-point (C-grid) 520 REAL(wp), DIMENSION(:,:,:), INTENT(in ) :: palb ! ice albedo (clear sky) (alb_ice_cs) [%] 521 REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_taui ! i- & j-components of surface ice stress [N/m2] 522 REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_tauj ! at I-point (B-grid) or U & V-point (C-grid) 523 REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qns ! non solar heat flux over ice (T-point) [W/m2] 524 REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qsr ! solar heat flux over ice (T-point) [W/m2] 525 REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_qla ! latent heat flux over ice (T-point) [W/m2] 526 REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_dqns ! non solar heat sensistivity (T-point) [W/m2] 527 REAL(wp), DIMENSION(:,:,:), INTENT( out) :: p_dqla ! latent heat sensistivity (T-point) [W/m2] 528 REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_tpr ! total precipitation (T-point) [Kg/m2/s] 529 REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_spr ! solid precipitation (T-point) [Kg/m2/s] 530 REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_fr1 ! 1sr fraction of qsr penetration in ice (T-point) [%] 531 REAL(wp), DIMENSION(:,:) , INTENT( out) :: p_fr2 ! 2nd fraction of qsr penetration in ice (T-point) [%] 532 CHARACTER(len=1) , INTENT(in ) :: cd_grid ! ice grid ( C or B-grid) 533 INTEGER , INTENT(in ) :: pdim ! number of ice categories 525 REAL(wp), DIMENSION(:,:,:), INTENT(in) :: ptsu ! sea ice surface temperature 526 REAL(wp), DIMENSION(:,:,:), INTENT(in) :: palb ! ice albedo (all skies) 534 527 !! 535 528 INTEGER :: ji, jj, jl ! dummy loop indices 536 INTEGER :: ijpl ! number of ice categories (size of 3rd dim of input arrays)537 529 REAL(wp) :: zst2, zst3 538 REAL(wp) :: zcoef_wnorm, zcoef_wnorm2, zcoef_dqlw, zcoef_dqla, zcoef_dqsb 539 REAL(wp) :: zztmp ! temporary variable 540 REAL(wp) :: zcoef_frca ! fractional cloud amount 541 REAL(wp) :: zwnorm_f, zwndi_f , zwndj_f ! relative wind module and components at F-point 542 REAL(wp) :: zwndi_t , zwndj_t ! relative wind components at T-point 543 !! 544 REAL(wp), DIMENSION(:,:) , POINTER :: z_wnds_t ! wind speed ( = | U10m - U_ice | ) at T-point 530 REAL(wp) :: zcoef_dqlw, zcoef_dqla, zcoef_dqsb 531 REAL(wp) :: zztmp, z1_lsub ! temporary variable 532 !! 545 533 REAL(wp), DIMENSION(:,:,:), POINTER :: z_qlw ! long wave heat flux over ice 546 534 REAL(wp), DIMENSION(:,:,:), POINTER :: z_qsb ! sensible heat flux over ice 547 535 REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqlw ! long wave heat sensitivity over ice 548 536 REAL(wp), DIMENSION(:,:,:), POINTER :: z_dqsb ! sensible heat sensitivity over ice 549 !!--------------------------------------------------------------------- 550 ! 551 IF( nn_timing == 1 ) CALL timing_start('blk_ice_core') 552 ! 553 CALL wrk_alloc( jpi,jpj, z_wnds_t ) 554 CALL wrk_alloc( jpi,jpj,pdim, z_qlw, z_qsb, z_dqlw, z_dqsb ) 555 556 ijpl = pdim ! number of ice categories 537 REAL(wp), DIMENSION(:,:) , POINTER :: zevap, zsnw ! evaporation and snw distribution after wind blowing (LIM3) 538 !!--------------------------------------------------------------------- 539 ! 540 IF( nn_timing == 1 ) CALL timing_start('blk_ice_core_flx') 541 ! 542 CALL wrk_alloc( jpi,jpj,jpl, z_qlw, z_qsb, z_dqlw, z_dqsb ) 557 543 558 544 ! local scalars ( place there for vector optimisation purposes) 559 zcoef_wnorm = rhoa * Cice560 zcoef_wnorm2 = rhoa * Cice * 0.5561 545 zcoef_dqlw = 4.0 * 0.95 * Stef 562 546 zcoef_dqla = -Ls * Cice * 11637800. * (-5897.8) 563 547 zcoef_dqsb = rhoa * cpa * Cice 564 zcoef_frca = 1.0 - 0.3565 ! MV 2014 the proper cloud fraction (mean summer months from the CLIO climato, NH+SH) is 0.19566 zcoef_frca = 1.0 - 0.19567 568 !!gm brutal....569 z_wnds_t(:,:) = 0.e0570 p_taui (:,:) = 0.e0571 p_tauj (:,:) = 0.e0572 !!gm end573 574 #if defined key_lim3575 tatm_ice(:,:) = sf(jp_tair)%fnow(:,:,1) ! LIM3: make Tair available in sea-ice. WARNING allocated after call to ice_init576 #endif577 ! ----------------------------------------------------------------------------- !578 ! Wind components and module relative to the moving ocean ( U10m - U_ice ) !579 ! ----------------------------------------------------------------------------- !580 SELECT CASE( cd_grid )581 CASE( 'I' ) ! B-grid ice dynamics : I-point (i.e. F-point with sea-ice indexation)582 ! and scalar wind at T-point ( = | U10m - U_ice | ) (masked)583 !CDIR NOVERRCHK584 DO jj = 2, jpjm1585 DO ji = 2, jpim1 ! B grid : NO vector opt586 ! ... scalar wind at I-point (fld being at T-point)587 zwndi_f = 0.25 * ( sf(jp_wndi)%fnow(ji-1,jj ,1) + sf(jp_wndi)%fnow(ji ,jj ,1) &588 & + sf(jp_wndi)%fnow(ji-1,jj-1,1) + sf(jp_wndi)%fnow(ji ,jj-1,1) ) - rn_vfac * pui(ji,jj)589 zwndj_f = 0.25 * ( sf(jp_wndj)%fnow(ji-1,jj ,1) + sf(jp_wndj)%fnow(ji ,jj ,1) &590 & + sf(jp_wndj)%fnow(ji-1,jj-1,1) + sf(jp_wndj)%fnow(ji ,jj-1,1) ) - rn_vfac * pvi(ji,jj)591 zwnorm_f = zcoef_wnorm * SQRT( zwndi_f * zwndi_f + zwndj_f * zwndj_f )592 ! ... ice stress at I-point593 p_taui(ji,jj) = zwnorm_f * zwndi_f594 p_tauj(ji,jj) = zwnorm_f * zwndj_f595 ! ... scalar wind at T-point (fld being at T-point)596 zwndi_t = sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.25 * ( pui(ji,jj+1) + pui(ji+1,jj+1) &597 & + pui(ji,jj ) + pui(ji+1,jj ) )598 zwndj_t = sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.25 * ( pvi(ji,jj+1) + pvi(ji+1,jj+1) &599 & + pvi(ji,jj ) + pvi(ji+1,jj ) )600 z_wnds_t(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1)601 END DO602 END DO603 CALL lbc_lnk( p_taui , 'I', -1. )604 CALL lbc_lnk( p_tauj , 'I', -1. )605 CALL lbc_lnk( z_wnds_t, 'T', 1. )606 !607 CASE( 'C' ) ! C-grid ice dynamics : U & V-points (same as ocean)608 #if defined key_vectopt_loop609 !CDIR COLLAPSE610 #endif611 DO jj = 2, jpj612 DO ji = fs_2, jpi ! vect. opt.613 zwndi_t = ( sf(jp_wndi)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( pui(ji-1,jj ) + pui(ji,jj) ) )614 zwndj_t = ( sf(jp_wndj)%fnow(ji,jj,1) - rn_vfac * 0.5 * ( pvi(ji ,jj-1) + pvi(ji,jj) ) )615 z_wnds_t(ji,jj) = SQRT( zwndi_t * zwndi_t + zwndj_t * zwndj_t ) * tmask(ji,jj,1)616 END DO617 END DO618 #if defined key_vectopt_loop619 !CDIR COLLAPSE620 #endif621 DO jj = 2, jpjm1622 DO ji = fs_2, fs_jpim1 ! vect. opt.623 p_taui(ji,jj) = zcoef_wnorm2 * ( z_wnds_t(ji+1,jj ) + z_wnds_t(ji,jj) ) &624 & * ( 0.5 * (sf(jp_wndi)%fnow(ji+1,jj,1) + sf(jp_wndi)%fnow(ji,jj,1) ) - rn_vfac * pui(ji,jj) )625 p_tauj(ji,jj) = zcoef_wnorm2 * ( z_wnds_t(ji,jj+1 ) + z_wnds_t(ji,jj) ) &626 & * ( 0.5 * (sf(jp_wndj)%fnow(ji,jj+1,1) + sf(jp_wndj)%fnow(ji,jj,1) ) - rn_vfac * pvi(ji,jj) )627 END DO628 END DO629 CALL lbc_lnk( p_taui , 'U', -1. )630 CALL lbc_lnk( p_tauj , 'V', -1. )631 CALL lbc_lnk( z_wnds_t, 'T', 1. )632 !633 END SELECT634 548 635 549 zztmp = 1. / ( 1. - albo ) 636 550 ! ! ========================== ! 637 DO jl = 1, ijpl! Loop over ice categories !551 DO jl = 1, jpl ! Loop over ice categories ! 638 552 ! ! ========================== ! 639 !CDIR NOVERRCHK640 !CDIR COLLAPSE641 553 DO jj = 1 , jpj 642 !CDIR NOVERRCHK643 554 DO ji = 1, jpi 644 555 ! ----------------------------! 645 556 ! I Radiative FLUXES ! 646 557 ! ----------------------------! 647 zst2 = p st(ji,jj,jl) * pst(ji,jj,jl)648 zst3 = p st(ji,jj,jl) * zst2558 zst2 = ptsu(ji,jj,jl) * ptsu(ji,jj,jl) 559 zst3 = ptsu(ji,jj,jl) * zst2 649 560 ! Short Wave (sw) 650 p_qsr(ji,jj,jl) = zztmp * ( 1. - palb(ji,jj,jl) ) * qsr(ji,jj)561 qsr_ice(ji,jj,jl) = zztmp * ( 1. - palb(ji,jj,jl) ) * qsr(ji,jj) 651 562 ! Long Wave (lw) 652 z_qlw(ji,jj,jl) = 0.95 * ( sf(jp_qlw)%fnow(ji,jj,1) - Stef * p st(ji,jj,jl) * zst3 ) * tmask(ji,jj,1)563 z_qlw(ji,jj,jl) = 0.95 * ( sf(jp_qlw)%fnow(ji,jj,1) - Stef * ptsu(ji,jj,jl) * zst3 ) * tmask(ji,jj,1) 653 564 ! lw sensitivity 654 565 z_dqlw(ji,jj,jl) = zcoef_dqlw * zst3 … … 660 571 ! ... turbulent heat fluxes 661 572 ! Sensible Heat 662 z_qsb(ji,jj,jl) = rhoa * cpa * Cice * z_wnds_t(ji,jj) * ( pst(ji,jj,jl) - sf(jp_tair)%fnow(ji,jj,1) )573 z_qsb(ji,jj,jl) = rhoa * cpa * Cice * wndm_ice(ji,jj) * ( ptsu(ji,jj,jl) - sf(jp_tair)%fnow(ji,jj,1) ) 663 574 ! Latent Heat 664 p_qla(ji,jj,jl) = rn_efac * MAX( 0.e0, rhoa * Ls * Cice * z_wnds_t(ji,jj) & 665 & * ( 11637800. * EXP( -5897.8 / pst(ji,jj,jl) ) / rhoa - sf(jp_humi)%fnow(ji,jj,1) ) ) 666 ! Latent heat sensitivity for ice (Dqla/Dt) 667 ! MV we also have to cap the sensitivity if the flux is zero 668 IF ( p_qla(ji,jj,jl) .GT. 0.0 ) THEN 669 p_dqla(ji,jj,jl) = rn_efac * zcoef_dqla * z_wnds_t(ji,jj) / ( zst2 ) * EXP( -5897.8 / pst(ji,jj,jl) ) 575 qla_ice(ji,jj,jl) = rn_efac * MAX( 0.e0, rhoa * Ls * Cice * wndm_ice(ji,jj) & 576 & * ( 11637800. * EXP( -5897.8 / ptsu(ji,jj,jl) ) / rhoa - sf(jp_humi)%fnow(ji,jj,1) ) ) 577 ! Latent heat sensitivity for ice (Dqla/Dt) 578 IF( qla_ice(ji,jj,jl) > 0._wp ) THEN 579 dqla_ice(ji,jj,jl) = rn_efac * zcoef_dqla * wndm_ice(ji,jj) / ( zst2 ) * EXP( -5897.8 / ptsu(ji,jj,jl) ) 670 580 ELSE 671 p_dqla(ji,jj,jl) = 0.0581 dqla_ice(ji,jj,jl) = 0._wp 672 582 ENDIF 673 583 674 584 ! Sensible heat sensitivity (Dqsb_ice/Dtn_ice) 675 z_dqsb(ji,jj,jl) = zcoef_dqsb * z_wnds_t(ji,jj)585 z_dqsb(ji,jj,jl) = zcoef_dqsb * wndm_ice(ji,jj) 676 586 677 587 ! ----------------------------! … … 679 589 ! ----------------------------! 680 590 ! Downward Non Solar flux 681 p_qns (ji,jj,jl) = z_qlw (ji,jj,jl) - z_qsb (ji,jj,jl) - p_qla (ji,jj,jl)591 qns_ice (ji,jj,jl) = z_qlw (ji,jj,jl) - z_qsb (ji,jj,jl) - qla_ice (ji,jj,jl) 682 592 ! Total non solar heat flux sensitivity for ice 683 p_dqns(ji,jj,jl) = - ( z_dqlw(ji,jj,jl) + z_dqsb(ji,jj,jl) + p_dqla(ji,jj,jl) )593 dqns_ice(ji,jj,jl) = - ( z_dqlw(ji,jj,jl) + z_dqsb(ji,jj,jl) + dqla_ice(ji,jj,jl) ) 684 594 END DO 685 595 ! … … 688 598 END DO 689 599 ! 600 tprecip(:,:) = sf(jp_prec)%fnow(:,:,1) * rn_pfac ! total precipitation [kg/m2/s] 601 sprecip(:,:) = sf(jp_snow)%fnow(:,:,1) * rn_pfac ! solid precipitation [kg/m2/s] 602 CALL iom_put( 'snowpre', sprecip * 86400. ) ! Snow precipitation 603 CALL iom_put( 'precip' , tprecip * 86400. ) ! Total precipitation 604 605 #if defined key_lim3 606 CALL wrk_alloc( jpi,jpj, zevap, zsnw ) 607 608 ! --- evaporation --- ! 609 z1_lsub = 1._wp / Lsub 610 evap_ice (:,:,:) = qla_ice (:,:,:) * z1_lsub ! sublimation 611 devap_ice(:,:,:) = dqla_ice(:,:,:) * z1_lsub 612 zevap (:,:) = emp(:,:) + tprecip(:,:) ! evaporation over ocean 613 614 ! --- evaporation minus precipitation --- ! 615 zsnw(:,:) = 0._wp 616 CALL lim_thd_snwblow( pfrld, zsnw ) ! snow distribution over ice after wind blowing 617 emp_oce(:,:) = pfrld(:,:) * zevap(:,:) - ( tprecip(:,:) - sprecip(:,:) ) - sprecip(:,:) * (1._wp - zsnw ) 618 emp_ice(:,:) = SUM( a_i_b(:,:,:) * evap_ice(:,:,:), dim=3 ) - sprecip(:,:) * zsnw 619 emp_tot(:,:) = emp_oce(:,:) + emp_ice(:,:) 620 621 ! --- heat flux associated with emp --- ! 622 qemp_oce(:,:) = - pfrld(:,:) * zevap(:,:) * sst_m(:,:) * rcp & ! evap at sst 623 & + ( tprecip(:,:) - sprecip(:,:) ) * ( sf(jp_tair)%fnow(:,:,1) - rt0 ) * rcp & ! liquid precip at Tair 624 & + sprecip(:,:) * ( 1._wp - zsnw ) * & ! solid precip at min(Tair,Tsnow) 625 & ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus ) 626 qemp_ice(:,:) = sprecip(:,:) * zsnw * & ! solid precip (only) 627 & ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus ) 628 629 ! --- total solar and non solar fluxes --- ! 630 qns_tot(:,:) = pfrld(:,:) * qns_oce(:,:) + SUM( a_i_b(:,:,:) * qns_ice(:,:,:), dim=3 ) + qemp_ice(:,:) + qemp_oce(:,:) 631 qsr_tot(:,:) = pfrld(:,:) * qsr_oce(:,:) + SUM( a_i_b(:,:,:) * qsr_ice(:,:,:), dim=3 ) 632 633 ! --- heat content of precip over ice in J/m3 (to be used in 1D-thermo) --- ! 634 qprec_ice(:,:) = rhosn * ( ( MIN( sf(jp_tair)%fnow(:,:,1), rt0_snow ) - rt0 ) * cpic * tmask(:,:,1) - lfus ) 635 636 CALL wrk_dealloc( jpi,jpj, zevap, zsnw ) 637 #endif 638 690 639 !-------------------------------------------------------------------- 691 640 ! FRACTIONs of net shortwave radiation which is not absorbed in the 692 641 ! thin surface layer and penetrates inside the ice cover 693 642 ! ( Maykut and Untersteiner, 1971 ; Ebert and Curry, 1993 ) 694 695 !CDIR COLLAPSE 696 p_fr1(:,:) = ( 0.18 * ( 1.0 - zcoef_frca ) + 0.35 * zcoef_frca ) 697 !CDIR COLLAPSE 698 p_fr2(:,:) = ( 0.82 * ( 1.0 - zcoef_frca ) + 0.65 * zcoef_frca ) 699 700 !CDIR COLLAPSE 701 p_tpr(:,:) = sf(jp_prec)%fnow(:,:,1) * rn_pfac ! total precipitation [kg/m2/s] 702 !CDIR COLLAPSE 703 p_spr(:,:) = sf(jp_snow)%fnow(:,:,1) * rn_pfac ! solid precipitation [kg/m2/s] 704 CALL iom_put( 'snowpre', p_spr * 86400. ) ! Snow precipitation 705 CALL iom_put( 'precip', p_tpr * 86400. ) ! Total precipitation 643 ! 644 fr1_i0(:,:) = ( 0.18 * ( 1.0 - cldf_ice ) + 0.35 * cldf_ice ) 645 fr2_i0(:,:) = ( 0.82 * ( 1.0 - cldf_ice ) + 0.65 * cldf_ice ) 646 ! 706 647 ! 707 648 IF(ln_ctl) THEN 708 CALL prt_ctl(tab3d_1=p_qla , clinfo1=' blk_ice_core: p_qla : ', tab3d_2=z_qsb , clinfo2=' z_qsb : ', kdim=ijpl) 709 CALL prt_ctl(tab3d_1=z_qlw , clinfo1=' blk_ice_core: z_qlw : ', tab3d_2=p_dqla , clinfo2=' p_dqla : ', kdim=ijpl) 710 CALL prt_ctl(tab3d_1=z_dqsb , clinfo1=' blk_ice_core: z_dqsb : ', tab3d_2=z_dqlw , clinfo2=' z_dqlw : ', kdim=ijpl) 711 CALL prt_ctl(tab3d_1=p_dqns , clinfo1=' blk_ice_core: p_dqns : ', tab3d_2=p_qsr , clinfo2=' p_qsr : ', kdim=ijpl) 712 CALL prt_ctl(tab3d_1=pst , clinfo1=' blk_ice_core: pst : ', tab3d_2=p_qns , clinfo2=' p_qns : ', kdim=ijpl) 713 CALL prt_ctl(tab2d_1=p_tpr , clinfo1=' blk_ice_core: p_tpr : ', tab2d_2=p_spr , clinfo2=' p_spr : ') 714 CALL prt_ctl(tab2d_1=p_taui , clinfo1=' blk_ice_core: p_taui : ', tab2d_2=p_tauj , clinfo2=' p_tauj : ') 715 CALL prt_ctl(tab2d_1=z_wnds_t, clinfo1=' blk_ice_core: z_wnds_t : ') 716 ENDIF 717 718 CALL wrk_dealloc( jpi,jpj, z_wnds_t ) 719 CALL wrk_dealloc( jpi,jpj,pdim, z_qlw, z_qsb, z_dqlw, z_dqsb ) 720 ! 721 IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core') 722 ! 723 END SUBROUTINE blk_ice_core 724 725 726 SUBROUTINE TURB_CORE_1Z(zu, sst, T_a, q_sat, q_a, & 727 & dU , Cd , Ch , Ce ) 649 CALL prt_ctl(tab3d_1=qla_ice , clinfo1=' blk_ice_core: qla_ice : ', tab3d_2=z_qsb , clinfo2=' z_qsb : ', kdim=jpl) 650 CALL prt_ctl(tab3d_1=z_qlw , clinfo1=' blk_ice_core: z_qlw : ', tab3d_2=dqla_ice, clinfo2=' dqla_ice : ', kdim=jpl) 651 CALL prt_ctl(tab3d_1=z_dqsb , clinfo1=' blk_ice_core: z_dqsb : ', tab3d_2=z_dqlw , clinfo2=' z_dqlw : ', kdim=jpl) 652 CALL prt_ctl(tab3d_1=dqns_ice, clinfo1=' blk_ice_core: dqns_ice : ', tab3d_2=qsr_ice , clinfo2=' qsr_ice : ', kdim=jpl) 653 CALL prt_ctl(tab3d_1=ptsu , clinfo1=' blk_ice_core: ptsu : ', tab3d_2=qns_ice , clinfo2=' qns_ice : ', kdim=jpl) 654 CALL prt_ctl(tab2d_1=tprecip , clinfo1=' blk_ice_core: tprecip : ', tab2d_2=sprecip , clinfo2=' sprecip : ') 655 ENDIF 656 657 CALL wrk_dealloc( jpi,jpj,jpl, z_qlw, z_qsb, z_dqlw, z_dqsb ) 658 ! 659 IF( nn_timing == 1 ) CALL timing_stop('blk_ice_core_flx') 660 661 END SUBROUTINE blk_ice_core_flx 662 #endif 663 664 SUBROUTINE turb_core_2z( zt, zu, sst, T_zt, q_sat, q_zt, dU, & 665 & Cd, Ch, Ce , T_zu, q_zu ) 728 666 !!---------------------------------------------------------------------- 729 667 !! *** ROUTINE turb_core *** 730 668 !! 731 669 !! ** Purpose : Computes turbulent transfert coefficients of surface 732 !! fluxes according to Large & Yeager (2004) 733 !! 734 !! ** Method : I N E R T I A L D I S S I P A T I O N M E T H O D 735 !! Momentum, Latent and sensible heat exchange coefficients 736 !! Caution: this procedure should only be used in cases when air 737 !! temperature (T_air), air specific humidity (q_air) and wind (dU) 738 !! are provided at the same height 'zzu'! 739 !! 740 !! References : Large & Yeager, 2004 : ??? 741 !!---------------------------------------------------------------------- 742 REAL(wp) , INTENT(in ) :: zu ! altitude of wind measurement [m] 743 REAL(wp), DIMENSION(:,:), INTENT(in ) :: sst ! sea surface temperature [Kelvin] 744 REAL(wp), DIMENSION(:,:), INTENT(in ) :: T_a ! potential air temperature [Kelvin] 745 REAL(wp), DIMENSION(:,:), INTENT(in ) :: q_sat ! sea surface specific humidity [kg/kg] 746 REAL(wp), DIMENSION(:,:), INTENT(in ) :: q_a ! specific air humidity [kg/kg] 747 REAL(wp), DIMENSION(:,:), INTENT(in ) :: dU ! wind module |U(zu)-U(0)| [m/s] 748 REAL(wp), DIMENSION(:,:), INTENT( out) :: Cd ! transfert coefficient for momentum (tau) 749 REAL(wp), DIMENSION(:,:), INTENT( out) :: Ch ! transfert coefficient for temperature (Q_sens) 750 REAL(wp), DIMENSION(:,:), INTENT( out) :: Ce ! transfert coefficient for evaporation (Q_lat) 751 !! 752 INTEGER :: j_itt 753 INTEGER , PARAMETER :: nb_itt = 3 754 REAL(wp), PARAMETER :: grav = 9.8 ! gravity 755 REAL(wp), PARAMETER :: kappa = 0.4 ! von Karman s constant 756 757 REAL(wp), DIMENSION(:,:), POINTER :: dU10 ! dU [m/s] 758 REAL(wp), DIMENSION(:,:), POINTER :: dT ! air/sea temperature differeence [K] 759 REAL(wp), DIMENSION(:,:), POINTER :: dq ! air/sea humidity difference [K] 760 REAL(wp), DIMENSION(:,:), POINTER :: Cd_n10 ! 10m neutral drag coefficient 761 REAL(wp), DIMENSION(:,:), POINTER :: Ce_n10 ! 10m neutral latent coefficient 762 REAL(wp), DIMENSION(:,:), POINTER :: Ch_n10 ! 10m neutral sensible coefficient 763 REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd_n10 ! root square of Cd_n10 764 REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd ! root square of Cd 765 REAL(wp), DIMENSION(:,:), POINTER :: T_vpot ! virtual potential temperature [K] 766 REAL(wp), DIMENSION(:,:), POINTER :: T_star ! turbulent scale of tem. fluct. 767 REAL(wp), DIMENSION(:,:), POINTER :: q_star ! turbulent humidity of temp. fluct. 768 REAL(wp), DIMENSION(:,:), POINTER :: U_star ! turb. scale of velocity fluct. 769 REAL(wp), DIMENSION(:,:), POINTER :: L ! Monin-Obukov length [m] 770 REAL(wp), DIMENSION(:,:), POINTER :: zeta ! stability parameter at height zu 771 REAL(wp), DIMENSION(:,:), POINTER :: U_n10 ! neutral wind velocity at 10m [m] 772 REAL(wp), DIMENSION(:,:), POINTER :: xlogt, xct, zpsi_h, zpsi_m 773 774 INTEGER , DIMENSION(:,:), POINTER :: stab ! 1st guess stability test integer 775 !!---------------------------------------------------------------------- 776 ! 777 IF( nn_timing == 1 ) CALL timing_start('TURB_CORE_1Z') 778 ! 779 CALL wrk_alloc( jpi,jpj, stab ) ! integer 780 CALL wrk_alloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) 781 CALL wrk_alloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta, U_n10, xlogt, xct, zpsi_h, zpsi_m ) 782 783 !! * Start 784 !! Air/sea differences 785 dU10 = max(0.5, dU) ! we don't want to fall under 0.5 m/s 786 dT = T_a - sst ! assuming that T_a is allready the potential temp. at zzu 787 dq = q_a - q_sat 788 !! 789 !! Virtual potential temperature 790 T_vpot = T_a*(1. + 0.608*q_a) 791 !! 792 !! Neutral Drag Coefficient 793 stab = 0.5 + sign(0.5,dT) ! stable : stab = 1 ; unstable : stab = 0 794 IF ( ln_cdgw ) THEN 795 cdn_wave = cdn_wave - rsmall*(tmask(:,:,1)-1) 796 Cd_n10(:,:) = cdn_wave 797 ELSE 798 Cd_n10 = 1.e-3 * ( 2.7/dU10 + 0.142 + dU10/13.09 ) ! L & Y eq. (6a) 799 ENDIF 800 sqrt_Cd_n10 = sqrt(Cd_n10) 801 Ce_n10 = 1.e-3 * ( 34.6 * sqrt_Cd_n10 ) ! L & Y eq. (6b) 802 Ch_n10 = 1.e-3*sqrt_Cd_n10*(18.*stab + 32.7*(1.-stab)) ! L & Y eq. (6c), (6d) 803 !! 804 !! Initializing transfert coefficients with their first guess neutral equivalents : 805 Cd = Cd_n10 ; Ce = Ce_n10 ; Ch = Ch_n10 ; sqrt_Cd = sqrt(Cd) 806 807 !! * Now starting iteration loop 808 DO j_itt=1, nb_itt 809 !! Turbulent scales : 810 U_star = sqrt_Cd*dU10 ! L & Y eq. (7a) 811 T_star = Ch/sqrt_Cd*dT ! L & Y eq. (7b) 812 q_star = Ce/sqrt_Cd*dq ! L & Y eq. (7c) 813 814 !! Estimate the Monin-Obukov length : 815 L = (U_star**2)/( kappa*grav*(T_star/T_vpot + q_star/(q_a + 1./0.608)) ) 816 817 !! Stability parameters : 818 zeta = zu/L ; zeta = sign( min(abs(zeta),10.0), zeta ) 819 zpsi_h = psi_h(zeta) 820 zpsi_m = psi_m(zeta) 821 822 IF ( ln_cdgw ) THEN 823 sqrt_Cd=kappa/((kappa/sqrt_Cd_n10) - zpsi_m) ; Cd=sqrt_Cd*sqrt_Cd; 824 ELSE 825 !! Shifting the wind speed to 10m and neutral stability : L & Y eq. (9a) 826 ! In very rare low-wind conditions, the old way of estimating the 827 ! neutral wind speed at 10m leads to a negative value that causes the code 828 ! to crash. To prevent this a threshold of 0.25m/s is now imposed. 829 U_n10 = MAX( 0.25 , dU10/(1. + sqrt_Cd_n10/kappa*(log(zu/10.) - zpsi_m)) ) 830 831 !! Updating the neutral 10m transfer coefficients : 832 Cd_n10 = 1.e-3 * (2.7/U_n10 + 0.142 + U_n10/13.09) ! L & Y eq. (6a) 833 sqrt_Cd_n10 = sqrt(Cd_n10) 834 Ce_n10 = 1.e-3 * (34.6 * sqrt_Cd_n10) ! L & Y eq. (6b) 835 stab = 0.5 + sign(0.5,zeta) 836 Ch_n10 = 1.e-3*sqrt_Cd_n10*(18.*stab + 32.7*(1.-stab)) ! L & Y eq. (6c), (6d) 837 838 !! Shifting the neutral 10m transfer coefficients to ( zu , zeta ) : 839 !! 840 xct = 1. + sqrt_Cd_n10/kappa*(log(zu/10) - zpsi_m) 841 Cd = Cd_n10/(xct*xct) ; sqrt_Cd = sqrt(Cd) 842 ENDIF 843 !! 844 xlogt = log(zu/10.) - zpsi_h 845 !! 846 xct = 1. + Ch_n10*xlogt/kappa/sqrt_Cd_n10 847 Ch = Ch_n10*sqrt_Cd/sqrt_Cd_n10/xct 848 !! 849 xct = 1. + Ce_n10*xlogt/kappa/sqrt_Cd_n10 850 Ce = Ce_n10*sqrt_Cd/sqrt_Cd_n10/xct 851 !! 852 END DO 853 !! 854 CALL wrk_dealloc( jpi,jpj, stab ) ! integer 855 CALL wrk_dealloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) 856 CALL wrk_dealloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta, U_n10, xlogt, xct, zpsi_h, zpsi_m ) 857 ! 858 IF( nn_timing == 1 ) CALL timing_stop('TURB_CORE_1Z') 859 ! 860 END SUBROUTINE TURB_CORE_1Z 861 862 863 SUBROUTINE TURB_CORE_2Z(zt, zu, sst, T_zt, q_sat, q_zt, dU, Cd, Ch, Ce, T_zu, q_zu) 864 !!---------------------------------------------------------------------- 865 !! *** ROUTINE turb_core *** 866 !! 867 !! ** Purpose : Computes turbulent transfert coefficients of surface 868 !! fluxes according to Large & Yeager (2004). 869 !! 870 !! ** Method : I N E R T I A L D I S S I P A T I O N M E T H O D 871 !! Momentum, Latent and sensible heat exchange coefficients 872 !! Caution: this procedure should only be used in cases when air 873 !! temperature (T_air) and air specific humidity (q_air) are at a 874 !! different height to wind (dU). 875 !! 876 !! References : Large & Yeager, 2004 : ??? 670 !! fluxes according to Large & Yeager (2004) and Large & Yeager (2008) 671 !! If relevant (zt /= zu), adjust temperature and humidity from height zt to zu 672 !! 673 !! ** Method : Monin Obukhov Similarity Theory 674 !! + Large & Yeager (2004,2008) closure: CD_n10 = f(U_n10) 675 !! 676 !! ** References : Large & Yeager, 2004 / Large & Yeager, 2008 677 !! 678 !! ** Last update: Laurent Brodeau, June 2014: 679 !! - handles both cases zt=zu and zt/=zu 680 !! - optimized: less 2D arrays allocated and less operations 681 !! - better first guess of stability by checking air-sea difference of virtual temperature 682 !! rather than temperature difference only... 683 !! - added function "cd_neutral_10m" that uses the improved parametrization of 684 !! Large & Yeager 2008. Drag-coefficient reduction for Cyclone conditions! 685 !! - using code-wide physical constants defined into "phycst.mod" rather than redifining them 686 !! => 'vkarmn' and 'grav' 877 687 !!---------------------------------------------------------------------- 878 688 REAL(wp), INTENT(in ) :: zt ! height for T_zt and q_zt [m] … … 882 692 REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_sat ! sea surface specific humidity [kg/kg] 883 693 REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: q_zt ! specific air humidity [kg/kg] 884 REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: dU ! relative wind module |U(zu)-U(0)|[m/s]694 REAL(wp), INTENT(in ), DIMENSION(jpi,jpj) :: dU ! relative wind module at zu [m/s] 885 695 REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Cd ! transfer coefficient for momentum (tau) 886 696 REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: Ch ! transfer coefficient for sensible heat (Q_sens) … … 888 698 REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: T_zu ! air temp. shifted at zu [K] 889 699 REAL(wp), INTENT( out), DIMENSION(jpi,jpj) :: q_zu ! spec. hum. shifted at zu [kg/kg] 890 891 INTEGER :: j_itt 892 INTEGER , PARAMETER :: nb_itt = 5 ! number of itterations 893 REAL(wp), PARAMETER :: grav = 9.8 ! gravity 894 REAL(wp), PARAMETER :: kappa = 0.4 ! von Karman's constant 895 896 REAL(wp), DIMENSION(:,:), POINTER :: dU10 ! dU [m/s] 897 REAL(wp), DIMENSION(:,:), POINTER :: dT ! air/sea temperature differeence [K] 898 REAL(wp), DIMENSION(:,:), POINTER :: dq ! air/sea humidity difference [K] 899 REAL(wp), DIMENSION(:,:), POINTER :: Cd_n10 ! 10m neutral drag coefficient 700 ! 701 INTEGER :: j_itt 702 INTEGER , PARAMETER :: nb_itt = 5 ! number of itterations 703 LOGICAL :: l_zt_equal_zu = .FALSE. ! if q and t are given at different height than U 704 ! 705 REAL(wp), DIMENSION(:,:), POINTER :: U_zu ! relative wind at zu [m/s] 900 706 REAL(wp), DIMENSION(:,:), POINTER :: Ce_n10 ! 10m neutral latent coefficient 901 707 REAL(wp), DIMENSION(:,:), POINTER :: Ch_n10 ! 10m neutral sensible coefficient 902 708 REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd_n10 ! root square of Cd_n10 903 709 REAL(wp), DIMENSION(:,:), POINTER :: sqrt_Cd ! root square of Cd 904 REAL(wp), DIMENSION(:,:), POINTER :: T_vpot ! virtual potential temperature [K]905 REAL(wp), DIMENSION(:,:), POINTER :: T_star ! turbulent scale of tem. fluct.906 REAL(wp), DIMENSION(:,:), POINTER :: q_star ! turbulent humidity of temp. fluct.907 REAL(wp), DIMENSION(:,:), POINTER :: U_star ! turb. scale of velocity fluct.908 REAL(wp), DIMENSION(:,:), POINTER :: L ! Monin-Obukov length [m]909 710 REAL(wp), DIMENSION(:,:), POINTER :: zeta_u ! stability parameter at height zu 910 711 REAL(wp), DIMENSION(:,:), POINTER :: zeta_t ! stability parameter at height zt 911 REAL(wp), DIMENSION(:,:), POINTER :: U_n10 ! neutral wind velocity at 10m [m] 912 REAL(wp), DIMENSION(:,:), POINTER :: xlogt, xct, zpsi_hu, zpsi_ht, zpsi_m 913 914 INTEGER , DIMENSION(:,:), POINTER :: stab ! 1st stability test integer 712 REAL(wp), DIMENSION(:,:), POINTER :: zpsi_h_u, zpsi_m_u 713 REAL(wp), DIMENSION(:,:), POINTER :: ztmp0, ztmp1, ztmp2 714 REAL(wp), DIMENSION(:,:), POINTER :: stab ! 1st stability test integer 915 715 !!---------------------------------------------------------------------- 916 ! 917 IF( nn_timing == 1 ) CALL timing_start('TURB_CORE_2Z') 918 ! 919 CALL wrk_alloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) 920 CALL wrk_alloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta_u, zeta_t, U_n10 ) 921 CALL wrk_alloc( jpi,jpj, xlogt, xct, zpsi_hu, zpsi_ht, zpsi_m ) 922 CALL wrk_alloc( jpi,jpj, stab ) ! interger 923 924 !! Initial air/sea differences 925 dU10 = max(0.5, dU) ! we don't want to fall under 0.5 m/s 926 dT = T_zt - sst 927 dq = q_zt - q_sat 928 929 !! Neutral Drag Coefficient : 930 stab = 0.5 + sign(0.5,dT) ! stab = 1 if dT > 0 -> STABLE 931 IF( ln_cdgw ) THEN 932 cdn_wave = cdn_wave - rsmall*(tmask(:,:,1)-1) 933 Cd_n10(:,:) = cdn_wave 716 717 IF( nn_timing == 1 ) CALL timing_start('turb_core_2z') 718 719 CALL wrk_alloc( jpi,jpj, U_zu, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd ) 720 CALL wrk_alloc( jpi,jpj, zeta_u, stab ) 721 CALL wrk_alloc( jpi,jpj, zpsi_h_u, zpsi_m_u, ztmp0, ztmp1, ztmp2 ) 722 723 l_zt_equal_zu = .FALSE. 724 IF( ABS(zu - zt) < 0.01 ) l_zt_equal_zu = .TRUE. ! testing "zu == zt" is risky with double precision 725 726 IF( .NOT. l_zt_equal_zu ) CALL wrk_alloc( jpi,jpj, zeta_t ) 727 728 U_zu = MAX( 0.5 , dU ) ! relative wind speed at zu (normally 10m), we don't want to fall under 0.5 m/s 729 730 !! First guess of stability: 731 ztmp0 = T_zt*(1. + 0.608*q_zt) - sst*(1. + 0.608*q_sat) ! air-sea difference of virtual pot. temp. at zt 732 stab = 0.5 + sign(0.5,ztmp0) ! stab = 1 if dTv > 0 => STABLE, 0 if unstable 733 734 !! Neutral coefficients at 10m: 735 IF( ln_cdgw ) THEN ! wave drag case 736 cdn_wave(:,:) = cdn_wave(:,:) + rsmall * ( 1._wp - tmask(:,:,1) ) 737 ztmp0 (:,:) = cdn_wave(:,:) 934 738 ELSE 935 Cd_n10 = 1.e-3*( 2.7/dU10 + 0.142 + dU10/13.09 )936 ENDIF 937 sqrt_Cd_n10 = sqrt(Cd_n10)739 ztmp0 = cd_neutral_10m( U_zu ) 740 ENDIF 741 sqrt_Cd_n10 = SQRT( ztmp0 ) 938 742 Ce_n10 = 1.e-3*( 34.6 * sqrt_Cd_n10 ) 939 743 Ch_n10 = 1.e-3*sqrt_Cd_n10*(18.*stab + 32.7*(1. - stab)) 940 744 941 745 !! Initializing transf. coeff. with their first guess neutral equivalents : 942 Cd = Cd_n10 ; Ce = Ce_n10 ; Ch = Ch_n10 ; sqrt_Cd = sqrt(Cd)943 944 !! Initializing z_u values with z_t values:945 T_zu = T_zt ;q_zu = q_zt746 Cd = ztmp0 ; Ce = Ce_n10 ; Ch = Ch_n10 ; sqrt_Cd = sqrt_Cd_n10 747 748 !! Initializing values at z_u with z_t values: 749 T_zu = T_zt ; q_zu = q_zt 946 750 947 751 !! * Now starting iteration loop 948 752 DO j_itt=1, nb_itt 949 dT = T_zu - sst ; dq = q_zu - q_sat ! Updating air/sea differences 950 T_vpot = T_zu*(1. + 0.608*q_zu) ! Updating virtual potential temperature at zu 951 U_star = sqrt_Cd*dU10 ! Updating turbulent scales : (L & Y eq. (7)) 952 T_star = Ch/sqrt_Cd*dT ! 953 q_star = Ce/sqrt_Cd*dq ! 954 !! 955 L = (U_star*U_star) & ! Estimate the Monin-Obukov length at height zu 956 & / (kappa*grav/T_vpot*(T_star*(1.+0.608*q_zu) + 0.608*T_zu*q_star)) 753 ! 754 ztmp1 = T_zu - sst ! Updating air/sea differences 755 ztmp2 = q_zu - q_sat 756 757 ! Updating turbulent scales : (L&Y 2004 eq. (7)) 758 ztmp1 = Ch/sqrt_Cd*ztmp1 ! theta* 759 ztmp2 = Ce/sqrt_Cd*ztmp2 ! q* 760 761 ztmp0 = T_zu*(1. + 0.608*q_zu) ! virtual potential temperature at zu 762 763 ! Estimate the inverse of Monin-Obukov length (1/L) at height zu: 764 ztmp0 = (vkarmn*grav/ztmp0*(ztmp1*(1.+0.608*q_zu) + 0.608*T_zu*ztmp2)) / (Cd*U_zu*U_zu) 765 ! ( Cd*U_zu*U_zu is U*^2 at zu) 766 957 767 !! Stability parameters : 958 zeta_u = zu/L ; zeta_u = sign( min(abs(zeta_u),10.0), zeta_u ) 959 zeta_t = zt/L ; zeta_t = sign( min(abs(zeta_t),10.0), zeta_t ) 960 zpsi_hu = psi_h(zeta_u) 961 zpsi_ht = psi_h(zeta_t) 962 zpsi_m = psi_m(zeta_u) 963 !! 964 !! Shifting the wind speed to 10m and neutral stability : L & Y eq.(9a) 965 ! In very rare low-wind conditions, the old way of estimating the 966 ! neutral wind speed at 10m leads to a negative value that causes the code 967 ! to crash. To prevent this a threshold of 0.25m/s is now imposed. 968 U_n10 = MAX( 0.25 , dU10/(1. + sqrt_Cd_n10/kappa*(log(zu/10.) - zpsi_m)) ) 969 !! 970 !! Shifting temperature and humidity at zu : (L & Y eq. (9b-9c)) 971 ! T_zu = T_zt - T_star/kappa*(log(zt/zu) + psi_h(zeta_u) - psi_h(zeta_t)) 972 T_zu = T_zt - T_star/kappa*(log(zt/zu) + zpsi_hu - zpsi_ht) 973 ! q_zu = q_zt - q_star/kappa*(log(zt/zu) + psi_h(zeta_u) - psi_h(zeta_t)) 974 q_zu = q_zt - q_star/kappa*(log(zt/zu) + zpsi_hu - zpsi_ht) 975 !! 976 !! q_zu cannot have a negative value : forcing 0 977 stab = 0.5 + sign(0.5,q_zu) ; q_zu = stab*q_zu 978 !! 979 IF( ln_cdgw ) THEN 980 sqrt_Cd=kappa/((kappa/sqrt_Cd_n10) - zpsi_m) ; Cd=sqrt_Cd*sqrt_Cd; 768 zeta_u = zu*ztmp0 ; zeta_u = sign( min(abs(zeta_u),10.0), zeta_u ) 769 zpsi_h_u = psi_h( zeta_u ) 770 zpsi_m_u = psi_m( zeta_u ) 771 772 !! Shifting temperature and humidity at zu (L&Y 2004 eq. (9b-9c)) 773 IF ( .NOT. l_zt_equal_zu ) THEN 774 zeta_t = zt*ztmp0 ; zeta_t = sign( min(abs(zeta_t),10.0), zeta_t ) 775 stab = LOG(zu/zt) - zpsi_h_u + psi_h(zeta_t) ! stab just used as temp array!!! 776 T_zu = T_zt + ztmp1/vkarmn*stab ! ztmp1 is still theta* 777 q_zu = q_zt + ztmp2/vkarmn*stab ! ztmp2 is still q* 778 q_zu = max(0., q_zu) 779 END IF 780 781 IF( ln_cdgw ) THEN ! surface wave case 782 sqrt_Cd = vkarmn / ( vkarmn / sqrt_Cd_n10 - zpsi_m_u ) 783 Cd = sqrt_Cd * sqrt_Cd 981 784 ELSE 982 !! Updating the neutral 10m transfer coefficients : 983 Cd_n10 = 1.e-3 * (2.7/U_n10 + 0.142 + U_n10/13.09) ! L & Y eq. (6a) 984 sqrt_Cd_n10 = sqrt(Cd_n10) 985 Ce_n10 = 1.e-3 * (34.6 * sqrt_Cd_n10) ! L & Y eq. (6b) 986 stab = 0.5 + sign(0.5,zeta_u) 987 Ch_n10 = 1.e-3*sqrt_Cd_n10*(18.*stab + 32.7*(1.-stab)) ! L & Y eq. (6c-6d) 988 !! 989 !! 990 !! Shifting the neutral 10m transfer coefficients to (zu,zeta_u) : 991 xct = 1. + sqrt_Cd_n10/kappa*(log(zu/10.) - zpsi_m) ! L & Y eq. (10a) 992 Cd = Cd_n10/(xct*xct) ; sqrt_Cd = sqrt(Cd) 785 ! Update neutral wind speed at 10m and neutral Cd at 10m (L&Y 2004 eq. 9a)... 786 ! In very rare low-wind conditions, the old way of estimating the 787 ! neutral wind speed at 10m leads to a negative value that causes the code 788 ! to crash. To prevent this a threshold of 0.25m/s is imposed. 789 ztmp0 = MAX( 0.25 , U_zu/(1. + sqrt_Cd_n10/vkarmn*(LOG(zu/10.) - zpsi_m_u)) ) ! U_n10 790 ztmp0 = cd_neutral_10m(ztmp0) ! Cd_n10 791 sqrt_Cd_n10 = sqrt(ztmp0) 792 793 Ce_n10 = 1.e-3 * (34.6 * sqrt_Cd_n10) ! L&Y 2004 eq. (6b) 794 stab = 0.5 + sign(0.5,zeta_u) ! update stability 795 Ch_n10 = 1.e-3*sqrt_Cd_n10*(18.*stab + 32.7*(1. - stab)) ! L&Y 2004 eq. (6c-6d) 796 797 !! Update of transfer coefficients: 798 ztmp1 = 1. + sqrt_Cd_n10/vkarmn*(LOG(zu/10.) - zpsi_m_u) ! L&Y 2004 eq. (10a) 799 Cd = ztmp0 / ( ztmp1*ztmp1 ) 800 sqrt_Cd = SQRT( Cd ) 993 801 ENDIF 994 !! 995 xlogt = log(zu/10.) - zpsi_hu 996 !! 997 xct = 1. + Ch_n10*xlogt/kappa/sqrt_Cd_n10 ! L & Y eq. (10b) 998 Ch = Ch_n10*sqrt_Cd/sqrt_Cd_n10/xct 999 !! 1000 xct = 1. + Ce_n10*xlogt/kappa/sqrt_Cd_n10 ! L & Y eq. (10c) 1001 Ce = Ce_n10*sqrt_Cd/sqrt_Cd_n10/xct 1002 !! 1003 !! 802 ! 803 ztmp0 = (LOG(zu/10.) - zpsi_h_u) / vkarmn / sqrt_Cd_n10 804 ztmp2 = sqrt_Cd / sqrt_Cd_n10 805 ztmp1 = 1. + Ch_n10*ztmp0 806 Ch = Ch_n10*ztmp2 / ztmp1 ! L&Y 2004 eq. (10b) 807 ! 808 ztmp1 = 1. + Ce_n10*ztmp0 809 Ce = Ce_n10*ztmp2 / ztmp1 ! L&Y 2004 eq. (10c) 810 ! 1004 811 END DO 1005 !! 1006 CALL wrk_dealloc( jpi,jpj, dU10, dT, dq, Cd_n10, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd, L ) 1007 CALL wrk_dealloc( jpi,jpj, T_vpot, T_star, q_star, U_star, zeta_u, zeta_t, U_n10 ) 1008 CALL wrk_dealloc( jpi,jpj, xlogt, xct, zpsi_hu, zpsi_ht, zpsi_m ) 1009 CALL wrk_dealloc( jpi,jpj, stab ) ! interger 1010 ! 1011 IF( nn_timing == 1 ) CALL timing_stop('TURB_CORE_2Z') 1012 ! 1013 END SUBROUTINE TURB_CORE_2Z 1014 1015 1016 FUNCTION psi_m(zta) !! Psis, L & Y eq. (8c), (8d), (8e) 812 813 CALL wrk_dealloc( jpi,jpj, U_zu, Ce_n10, Ch_n10, sqrt_Cd_n10, sqrt_Cd ) 814 CALL wrk_dealloc( jpi,jpj, zeta_u, stab ) 815 CALL wrk_dealloc( jpi,jpj, zpsi_h_u, zpsi_m_u, ztmp0, ztmp1, ztmp2 ) 816 817 IF( .NOT. l_zt_equal_zu ) CALL wrk_dealloc( jpi,jpj, zeta_t ) 818 819 IF( nn_timing == 1 ) CALL timing_stop('turb_core_2z') 820 ! 821 END SUBROUTINE turb_core_2z 822 823 824 FUNCTION cd_neutral_10m( zw10 ) 825 !!---------------------------------------------------------------------- 826 !! Estimate of the neutral drag coefficient at 10m as a function 827 !! of neutral wind speed at 10m 828 !! 829 !! Origin: Large & Yeager 2008 eq.(11a) and eq.(11b) 830 !! 831 !! Author: L. Brodeau, june 2014 832 !!---------------------------------------------------------------------- 833 REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: zw10 ! scalar wind speed at 10m (m/s) 834 REAL(wp), DIMENSION(jpi,jpj) :: cd_neutral_10m 835 ! 836 REAL(wp), DIMENSION(:,:), POINTER :: rgt33 837 !!---------------------------------------------------------------------- 838 ! 839 CALL wrk_alloc( jpi,jpj, rgt33 ) 840 ! 841 !! When wind speed > 33 m/s => Cyclone conditions => special treatment 842 rgt33 = 0.5_wp + SIGN( 0.5_wp, (zw10 - 33._wp) ) ! If zw10 < 33. => 0, else => 1 843 cd_neutral_10m = 1.e-3 * ( & 844 & (1._wp - rgt33)*( 2.7_wp/zw10 + 0.142_wp + zw10/13.09_wp - 3.14807E-10*zw10**6) & ! zw10< 33. 845 & + rgt33 * 2.34 ) ! zw10 >= 33. 846 ! 847 CALL wrk_dealloc( jpi,jpj, rgt33) 848 ! 849 END FUNCTION cd_neutral_10m 850 851 852 FUNCTION psi_m(pta) !! Psis, L&Y 2004 eq. (8c), (8d), (8e) 1017 853 !------------------------------------------------------------------------------- 1018 REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: zta 1019 1020 REAL(wp), PARAMETER :: pi = 3.141592653589793_wp 854 ! universal profile stability function for momentum 855 !------------------------------------------------------------------------------- 856 REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pta 857 ! 1021 858 REAL(wp), DIMENSION(jpi,jpj) :: psi_m 1022 859 REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit 1023 860 !------------------------------------------------------------------------------- 1024 861 ! 1025 862 CALL wrk_alloc( jpi,jpj, X2, X, stabit ) 1026 1027 X2 = sqrt(abs(1. - 16.*zta)) ; X2 = max(X2 , 1.0) ; X = sqrt(X2)1028 stabit = 0.5 + sign(0.5,zta)1029 psi_m = -5.* zta*stabit & ! Stable1030 & + (1. - stabit)*(2 *log((1. + X)/2) + log((1. + X2)/2) - 2*atan(X) + pi/2) ! Unstable1031 863 ! 864 X2 = SQRT( ABS( 1. - 16.*pta ) ) ; X2 = MAX( X2 , 1. ) ; X = SQRT( X2 ) 865 stabit = 0.5 + SIGN( 0.5 , pta ) 866 psi_m = -5.*pta*stabit & ! Stable 867 & + (1. - stabit)*(2.*LOG((1. + X)*0.5) + LOG((1. + X2)*0.5) - 2.*ATAN(X) + rpi*0.5) ! Unstable 868 ! 1032 869 CALL wrk_dealloc( jpi,jpj, X2, X, stabit ) 1033 870 ! 1034 1035 1036 1037 FUNCTION psi_h( zta ) !! Psis, L & Yeq. (8c), (8d), (8e)871 END FUNCTION psi_m 872 873 874 FUNCTION psi_h( pta ) !! Psis, L&Y 2004 eq. (8c), (8d), (8e) 1038 875 !------------------------------------------------------------------------------- 1039 REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: zta 876 ! universal profile stability function for temperature and humidity 877 !------------------------------------------------------------------------------- 878 REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pta 1040 879 ! 1041 880 REAL(wp), DIMENSION(jpi,jpj) :: psi_h 1042 REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit881 REAL(wp), DIMENSION(:,:), POINTER :: X2, X, stabit 1043 882 !------------------------------------------------------------------------------- 1044 883 ! 1045 884 CALL wrk_alloc( jpi,jpj, X2, X, stabit ) 1046 1047 X2 = sqrt(abs(1. - 16.*zta)) ; X2 = max(X2 , 1.) ; X = sqrt(X2)1048 stabit = 0.5 + sign(0.5,zta)1049 psi_h = -5.* zta*stabit& ! Stable1050 & + (1. - stabit)*(2.* log( (1. + X2)/2. ))! Unstable1051 885 ! 886 X2 = SQRT( ABS( 1. - 16.*pta ) ) ; X2 = MAX( X2 , 1. ) ; X = SQRT( X2 ) 887 stabit = 0.5 + SIGN( 0.5 , pta ) 888 psi_h = -5.*pta*stabit & ! Stable 889 & + (1. - stabit)*(2.*LOG( (1. + X2)*0.5 )) ! Unstable 890 ! 1052 891 CALL wrk_dealloc( jpi,jpj, X2, X, stabit ) 1053 892 ! 1054 1055 893 END FUNCTION psi_h 894 1056 895 !!====================================================================== 1057 896 END MODULE sbcblk_core
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