MODULE limsbc_2 !!====================================================================== !! *** MODULE limsbc_2 *** !! LIM-2 : updates the fluxes at the ocean surface with ice-ocean fluxes !!====================================================================== !! History : LIM ! 2000-01 (H. Goosse) Original code !! 1.0 ! 2002-07 (C. Ethe, G. Madec) re-writing F90 !! 3.0 ! 2006-07 (G. Madec) surface module !! 3.3 ! 2009-05 (G. Garric, C. Bricaud) addition of the lim2_evp case !! - ! 2010-11 (G. Madec) ice-ocean stress computed at each ocean time-step !! 3.3.1 ! 2011-01 (A. R. Porter, STFC Daresbury) dynamical allocation !! 3.5 ! 2012-11 ((G. Madec, Y. Aksenov, A. Coward) salt and heat fluxes associated with e-p !!---------------------------------------------------------------------- #if defined key_lim2 !!---------------------------------------------------------------------- !! 'key_lim2' LIM 2.0 sea-ice model !!---------------------------------------------------------------------- !! lim_sbc_alloc_2 : allocate the limsbc arrays !! lim_sbc_init : initialisation !! lim_sbc_flx_2 : update mass, heat and salt fluxes at the ocean surface !! lim_sbc_tau_2 : update i- and j-stresses, and its modulus at the ocean surface !!---------------------------------------------------------------------- USE par_oce ! ocean parameters USE phycst ! physical constants USE dom_oce ! ocean domain USE dom_ice_2 ! LIM-2: ice domain USE ice_2 ! LIM-2: ice variables USE sbc_ice ! surface boundary condition: ice USE sbc_oce ! surface boundary condition: ocean USE sbccpl USE cpl_oasis3, ONLY : lk_cpl USE oce , ONLY : sshn, sshb, snwice_mass, snwice_mass_b, snwice_fmass USE albedo ! albedo parameters USE lbclnk ! ocean lateral boundary condition - MPP exchanges USE lib_mpp ! MPP library USE wrk_nemo ! work arrays USE in_out_manager ! I/O manager USE diaar5, ONLY : lk_diaar5 USE iom ! I/O library USE prtctl ! Print control USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) IMPLICIT NONE PRIVATE PUBLIC lim_sbc_init_2 ! called by ice_init_2 PUBLIC lim_sbc_flx_2 ! called by sbc_ice_lim_2 PUBLIC lim_sbc_tau_2 ! called by sbc_ice_lim_2 REAL(wp) :: r1_rdtice ! = 1. / rdt_ice REAL(wp) :: epsi16 = 1.e-16_wp ! constant values REAL(wp) :: rzero = 0._wp ! - - REAL(wp) :: rone = 1._wp ! - - ! REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: soce_0, sice_0 ! constant SSS and ice salinity used in levitating sea-ice case REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: utau_oce, vtau_oce ! air-ocean surface i- & j-stress [N/m2] REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: tmod_io ! modulus of the ice-ocean relative velocity [m/s] !! * Substitutions # include "vectopt_loop_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/LIM2 4.0 , UCL - NEMO Consortium (2011) !! $Id$ !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- CONTAINS INTEGER FUNCTION lim_sbc_alloc_2() !!------------------------------------------------------------------- !! *** ROUTINE lim_sbc_alloc_2 *** !!------------------------------------------------------------------- ALLOCATE( soce_0(jpi,jpj) , utau_oce(jpi,jpj) , & & sice_0(jpi,jpj) , vtau_oce(jpi,jpj) , tmod_io(jpi,jpj), STAT=lim_sbc_alloc_2) ! IF( lk_mpp ) CALL mpp_sum( lim_sbc_alloc_2 ) IF( lim_sbc_alloc_2 /= 0 ) CALL ctl_warn('lim_sbc_alloc_2: failed to allocate arrays.') ! END FUNCTION lim_sbc_alloc_2 SUBROUTINE lim_sbc_flx_2( kt ) !!------------------------------------------------------------------- !! *** ROUTINE lim_sbc_2 *** !! !! ** Purpose : Update surface ocean boundary condition over areas !! that are at least partially covered by sea-ice !! !! ** Action : - comput. of the momentum, heat and freshwater/salt !! fluxes at the ice-ocean interface. !! - Update the fluxes provided to the ocean !! !! ** Outputs : - qsr : sea heat flux : solar !! - qns : sea heat flux : non solar (including heat content of the mass flux) !! - emp : freshwater budget: mass flux !! - sfx : freshwater budget: salt flux due to Freezing/Melting !! - utau : sea surface i-stress (ocean referential) !! - vtau : sea surface j-stress (ocean referential) !! - fr_i : ice fraction !! - tn_ice : sea-ice surface temperature !! - alb_ice : sea-ice alberdo (lk_cpl=T) !! !! References : Goosse, H. et al. 1996, Bul. Soc. Roy. Sc. Liege, 65, 87-90. !! Tartinville et al. 2001 Ocean Modelling, 3, 95-108. !!--------------------------------------------------------------------- INTEGER, INTENT(in) :: kt ! number of iteration !! INTEGER :: ji, jj ! dummy loop indices INTEGER :: ii0, ii1, ij0, ij1 ! local integers INTEGER :: ifvt, i1mfr, idfr, iflt ! - - INTEGER :: ial, iadv, ifral, ifrdv ! - - REAL(wp) :: zqsr, zqns, zfmm ! local scalars REAL(wp) :: zinda, zfsalt, zemp ! - - REAL(wp) :: zemp_snw, zqhc, zcd ! - - REAL(wp) :: zswitch ! - - REAL(wp), POINTER, DIMENSION(:,:) :: zqnsoce ! 2D workspace REAL(wp), POINTER, DIMENSION(:,:,:) :: zalb, zalbp ! 2D/3D workspace !!--------------------------------------------------------------------- CALL wrk_alloc( jpi, jpj, zqnsoce ) CALL wrk_alloc( jpi, jpj, 1, zalb, zalbp ) SELECT CASE( nn_ice_embd ) ! levitating or embedded sea-ice option CASE( 0 ) ; zswitch = 1 ! (0) standard levitating sea-ice : salt exchange only CASE( 1, 2 ) ; zswitch = 0 ! (1) levitating sea-ice: salt and volume exchange but no pressure effect ! (2) embedded sea-ice : salt and volume fluxes and pressure END SELECT ! !------------------------------------------! ! heat flux at the ocean surface ! !------------------------------------------! zqnsoce(:,:) = qns(:,:) DO jj = 1, jpj DO ji = 1, jpi zinda = 1.0 - MAX( rzero , SIGN( rone, - ( 1.0 - pfrld(ji,jj) ) ) ) ifvt = zinda * MAX( rzero , SIGN( rone, - phicif(ji,jj) ) ) i1mfr = 1.0 - MAX( rzero , SIGN( rone, - ( 1.0 - frld(ji,jj) ) ) ) idfr = 1.0 - MAX( rzero , SIGN( rone, frld(ji,jj) - pfrld(ji,jj) ) ) iflt = zinda * (1 - i1mfr) * (1 - ifvt ) ial = ifvt * i1mfr + ( 1 - ifvt ) * idfr iadv = ( 1 - i1mfr ) * zinda ifral = ( 1 - i1mfr * ( 1 - ial ) ) ifrdv = ( 1 - ifral * ( 1 - ial ) ) * iadv !!$ attempt to explain the tricky flags set above.... !!$ zinda = 1.0 - AINT( pfrld(ji,jj) ) ! = 0. if ice-free ocean else 1. (after ice adv, but before ice thermo) !!$ i1mfr = 1.0 - AINT( frld(ji,jj) ) ! = 0. if ice-free ocean else 1. (after ice thermo) !!$ !!$ IF( phicif(ji,jj) <= 0. ) THEN ; ifvt = zinda ! = zinda if previous thermodynamic step overmelted the ice??? !!$ ELSE ; ifvt = 0. ! !!$ ENDIF !!$ !!$ IF( frld(ji,jj) >= pfrld(ji,jj) ) THEN ; idfr = 0. ! = 0. if lead fraction increases due to ice thermodynamics !!$ ELSE ; idfr = 1. !!$ ENDIF !!$ !!$ iflt = zinda * (1 - i1mfr) * (1 - ifvt ) ! = 1. if ice (not only snow) at previous time and ice-free ocean currently !!$ !!$ ial = ifvt * i1mfr + ( 1 - ifvt ) * idfr !!$ = i1mfr if ifvt = 1 i.e. !!$ = idfr if ifvt = 0 !!$! snow no ice ice ice or nothing lead fraction increases !!$! at previous now at previous !!$! -> ice area increases ??? -> ice area decreases ??? !!$ !!$ iadv = ( 1 - i1mfr ) * zinda !!$! pure ocean ice at !!$! at current previous !!$! -> = 1. if ice disapear between previous and current !!$ !!$ ifral = ( 1 - i1mfr * ( 1 - ial ) ) !!$! ice at ??? !!$! current !!$! -> ??? !!$ !!$ ifrdv = ( 1 - ifral * ( 1 - ial ) ) * iadv !!$! ice disapear !!$ !!$ ! computation the solar flux at ocean surface #if defined key_coupled zqsr = qsr_tot(ji,jj) + ( fstric(ji,jj) - qsr_ice(ji,jj,1) ) * ( 1.0 - pfrld(ji,jj) ) #else zqsr = pfrld(ji,jj) * qsr(ji,jj) + ( 1. - pfrld(ji,jj) ) * fstric(ji,jj) #endif ! computation the non solar heat flux at ocean surface zqns = - ( 1. - thcm(ji,jj) ) * zqsr & ! part of the solar energy used in leads & + iflt * ( fscmbq(ji,jj) + ffltbif(ji,jj) ) & & + ifral * ( ial * qcmif(ji,jj) + (1 - ial) * qldif(ji,jj) ) * r1_rdtice & & + ifrdv * ( qfvbq(ji,jj) + qdtcn(ji,jj) ) * r1_rdtice fsbbq(ji,jj) = ( 1.0 - ( ifvt + iflt ) ) * fscmbq(ji,jj) ! store residual heat flux (to put into the ocean at the next time-step) zqhc = ( rdq_snw(ji,jj) & & + rdq_ice(ji,jj) * ( 1.- zswitch) ) * r1_rdtice ! heat flux due to snow ( & ice heat content, ! ! if ice/ocean mass exchange active) qsr (ji,jj) = zqsr ! solar heat flux qns (ji,jj) = zqns - fdtcn(ji,jj) + zqhc ! non solar heat flux ! ! !------------------------------------------! ! ! mass and salt flux at the ocean surface ! ! !------------------------------------------! ! ! mass flux at the ocean-atmosphere interface (open ocean fraction = leads area) #if defined key_coupled ! ! coupled mode: zemp = + emp_tot(ji,jj) & ! net mass flux over the grid cell (ice+ocean area) & - emp_ice(ji,jj) * ( 1. - pfrld(ji,jj) ) ! minus the mass flux intercepted by sea-ice #else ! ! forced mode: zemp = + emp(ji,jj) * frld(ji,jj) & ! mass flux over open ocean fraction & - tprecip(ji,jj) * ( 1. - frld(ji,jj) ) & ! liquid precip. over ice reaches directly the ocean & + sprecip(ji,jj) * ( 1. - pfrld(ji,jj) ) ! snow is intercepted by sea-ice (previous frld) #endif ! ! mass flux at the ocean/ice interface (sea ice fraction) zemp_snw = rdm_snw(ji,jj) * r1_rdtice ! snow melting = pure water that enters the ocean zfmm = rdm_ice(ji,jj) * r1_rdtice ! Freezing minus Melting (F-M) ! salt flux at the ice/ocean interface (sea ice fraction) [PSU*kg/m2/s] zfsalt = - sice_0(ji,jj) * zfmm ! F-M salt exchange zcd = soce_0(ji,jj) * zfmm ! concentration/dilution term due to F-M ! ! salt flux only : add concentration dilution term in salt flux and no F-M term in volume flux ! salt and mass fluxes : non concentration dilution term in salt flux and add F-M term in volume flux sfx (ji,jj) = zfsalt + zswitch * zcd ! salt flux (+ C/D if no ice/ocean mass exchange) emp (ji,jj) = zemp + zemp_snw + ( 1.- zswitch) * zfmm ! mass flux (+ F/M mass flux if ice/ocean mass exchange) ! END DO END DO ! !------------------------------------------! ! ! mass of snow and ice per unit area ! ! !------------------------------------------! IF( nn_ice_embd /= 0 ) THEN ! embedded sea-ice (mass required) snwice_mass_b(:,:) = snwice_mass(:,:) ! save mass from the previous ice time step ! ! new mass per unit area snwice_mass (:,:) = tms(:,:) * ( rhosn * hsnif(:,:) + rhoic * hicif(:,:) ) * ( 1.0 - frld(:,:) ) ! ! time evolution of snow+ice mass snwice_fmass (:,:) = ( snwice_mass(:,:) - snwice_mass_b(:,:) ) / rdt_ice ENDIF CALL iom_put( 'hflx_ice_cea', - fdtcn(:,:) ) CALL iom_put( 'qns_io_cea', qns(:,:) - zqnsoce(:,:) * pfrld(:,:) ) CALL iom_put( 'qsr_io_cea', fstric(:,:) * (1.e0 - pfrld(:,:)) ) IF( lk_diaar5 ) THEN ! AR5 diagnostics CALL iom_put( 'isnwmlt_cea' , rdm_snw(:,:) * r1_rdtice ) CALL iom_put( 'fsal_virt_cea', soce_0(:,:) * rdm_ice(:,:) * r1_rdtice ) CALL iom_put( 'fsal_real_cea', - sice_0(:,:) * rdm_ice(:,:) * r1_rdtice ) ENDIF !-----------------------------------------------! ! Coupling variables ! !-----------------------------------------------! #if defined key_coupled tn_ice(:,:,1) = sist(:,:) ! sea-ice surface temperature ht_i(:,:,1) = hicif(:,:) ht_s(:,:,1) = hsnif(:,:) a_i(:,:,1) = fr_i(:,:) ! ! Computation of snow/ice and ocean albedo CALL albedo_ice( tn_ice, ht_i, ht_s, zalbp, zalb ) alb_ice(:,:,1) = 0.5 * ( zalbp(:,:,1) + zalb (:,:,1) ) ! Ice albedo (mean clear and overcast skys) CALL iom_put( "icealb_cea", alb_ice(:,:,1) * fr_i(:,:) ) ! ice albedo #endif IF(ln_ctl) THEN ! control print CALL prt_ctl(tab2d_1=qsr , clinfo1=' lim_sbc: qsr : ', tab2d_2=qns , clinfo2=' qns : ') CALL prt_ctl(tab2d_1=emp , clinfo1=' lim_sbc: emp : ', tab2d_2=sfx , clinfo2=' sfx : ') CALL prt_ctl(tab2d_1=utau , clinfo1=' lim_sbc: utau : ', mask1=umask, & & tab2d_2=vtau , clinfo2=' vtau : ' , mask2=vmask ) CALL prt_ctl(tab2d_1=fr_i , clinfo1=' lim_sbc: fr_i : ', tab2d_2=tn_ice(:,:,1), clinfo2=' tn_ice : ') ENDIF ! CALL wrk_dealloc( jpi, jpj, zqnsoce ) CALL wrk_dealloc( jpi, jpj, 1, zalb, zalbp ) ! END SUBROUTINE lim_sbc_flx_2 SUBROUTINE lim_sbc_tau_2( kt , pu_oce, pv_oce ) !!------------------------------------------------------------------- !! *** ROUTINE lim_sbc_tau_2 *** !! !! ** Purpose : Update the ocean surface stresses due to the ice !! !! ** Action : * at each ice time step (every nn_fsbc time step): !! - compute the modulus of ice-ocean relative velocity !! at T-point (C-grid) or I-point (B-grid) !! tmod_io = rhoco * | U_ice-U_oce | !! - update the modulus of stress at ocean surface !! taum = frld * taum + (1-frld) * tmod_io * | U_ice-U_oce | !! * at each ocean time step (each kt): !! compute linearized ice-ocean stresses as !! Utau = tmod_io * | U_ice - pU_oce | !! using instantaneous current ocean velocity (usually before) !! !! NB: - the averaging operator used depends on the ice dynamics grid (cp_ice_msh='I' or 'C') !! - ice-ocean rotation angle only allowed in cp_ice_msh='I' case !! - here we make an approximation: taum is only computed every ice time step !! This avoids mutiple average to pass from T -> U,V grids and next from U,V grids !! to T grid. taum is used in TKE and GLS, which should not be too sensitive to this approximation... !! !! ** Outputs : - utau, vtau : surface ocean i- and j-stress (u- & v-pts) updated with ice-ocean fluxes !! - taum : modulus of the surface ocean stress (T-point) updated with ice-ocean fluxes !!--------------------------------------------------------------------- INTEGER , INTENT(in) :: kt ! ocean time-step index REAL(wp), DIMENSION(jpi,jpj), INTENT(in) :: pu_oce, pv_oce ! surface ocean currents !! INTEGER :: ji, jj ! dummy loop indices REAL(wp) :: zfrldu, zat_u, zu_i, zutau_ice, zu_t, zmodt ! local scalar REAL(wp) :: zfrldv, zat_v, zv_i, zvtau_ice, zv_t, zmodi ! - - REAL(wp) :: zsang, zumt ! - - REAL(wp), POINTER, DIMENSION(:,:) :: ztio_u, ztio_v ! ocean stress below sea-ice !!--------------------------------------------------------------------- ! CALL wrk_alloc( jpi, jpj, ztio_u, ztio_v ) ! SELECT CASE( cp_ice_msh ) ! !-----------------------! CASE( 'I' ) ! B-grid ice dynamics ! I-point (i.e. F-point with sea-ice indexation) ! !--=--------------------! ! IF( MOD( kt-1, nn_fsbc ) == 0 ) THEN !== Ice time-step only ==! (i.e. surface module time-step) !CDIR NOVERRCHK DO jj = 1, jpj !* modulus of ice-ocean relative velocity at I-point !CDIR NOVERRCHK DO ji = 1, jpi zu_i = u_ice(ji,jj) - u_oce(ji,jj) ! ice-ocean relative velocity at I-point zv_i = v_ice(ji,jj) - v_oce(ji,jj) tmod_io(ji,jj) = SQRT( zu_i * zu_i + zv_i * zv_i ) ! modulus of this velocity (at I-point) END DO END DO !CDIR NOVERRCHK DO jj = 1, jpjm1 !* update the modulus of stress at ocean surface (T-point) !CDIR NOVERRCHK DO ji = 1, jpim1 ! NO vector opt. ! ! modulus of U_ice-U_oce at T-point zumt = 0.25_wp * ( tmod_io(ji+1,jj) + tmod_io(ji ,jj ) & & + tmod_io(ji,jj+1) + tmod_io(ji+1,jj+1) ) ! ! update the modulus of stress at ocean surface taum(ji,jj) = frld(ji,jj) * taum(ji,jj) + ( 1._wp - frld(ji,jj) ) * rhoco * zumt * zumt END DO END DO CALL lbc_lnk( taum, 'T', 1. ) ! utau_oce(:,:) = utau(:,:) !* save the air-ocean stresses at ice time-step vtau_oce(:,:) = vtau(:,:) ! ENDIF ! ! !== at each ocean time-step ==! ! ! !* ice/ocean stress WITH a ice-ocean rotation angle at I-point DO jj = 2, jpj zsang = SIGN( 1._wp, gphif(1,jj) ) * sangvg ! change the cosine angle sign in the SH DO ji = 2, jpi ! NO vect. opt. possible ! ... ice-ocean relative velocity at I-point using instantaneous surface ocean current at u- & v-pts zu_i = u_ice(ji,jj) - 0.5_wp * ( pu_oce(ji-1,jj ) + pu_oce(ji-1,jj-1) ) * tmu(ji,jj) zv_i = v_ice(ji,jj) - 0.5_wp * ( pv_oce(ji ,jj-1) + pv_oce(ji-1,jj-1) ) * tmu(ji,jj) ! ... components of stress with a ice-ocean rotation angle zmodi = rhoco * tmod_io(ji,jj) ztio_u(ji,jj) = zmodi * ( cangvg * zu_i - zsang * zv_i ) ztio_v(ji,jj) = zmodi * ( cangvg * zv_i + zsang * zu_i ) END DO END DO ! !* surface ocean stresses at u- and v-points DO jj = 2, jpjm1 DO ji = 2, jpim1 ! NO vector opt. ! ! ice-ocean stress at U and V-points (from I-point values) zutau_ice = 0.5_wp * ( ztio_u(ji+1,jj) + ztio_u(ji+1,jj+1) ) zvtau_ice = 0.5_wp * ( ztio_v(ji,jj+1) + ztio_v(ji+1,jj+1) ) ! ! open-ocean (lead) fraction at U- & V-points (from T-point values) zfrldu = 0.5_wp * ( frld(ji,jj) + frld(ji+1,jj) ) zfrldv = 0.5_wp * ( frld(ji,jj) + frld(ji,jj+1) ) ! ! update the surface ocean stress (ice-cover wheighted) utau(ji,jj) = zfrldu * utau_oce(ji,jj) + ( 1._wp - zfrldu ) * zutau_ice vtau(ji,jj) = zfrldv * vtau_oce(ji,jj) + ( 1._wp - zfrldv ) * zvtau_ice END DO END DO CALL lbc_lnk( utau, 'U', -1. ) ; CALL lbc_lnk( vtau, 'V', -1. ) ! lateral boundary condition ! ! ! !-----------------------! CASE( 'C' ) ! C-grid ice dynamics ! U & V-points (same as in the ocean) ! !--=--------------------! ! IF( MOD( kt-1, nn_fsbc ) == 0 ) THEN !== Ice time-step only ==! (i.e. surface module time-step) !CDIR NOVERRCHK DO jj = 2, jpjm1 !* modulus of the ice-ocean velocity at T-point !CDIR NOVERRCHK DO ji = fs_2, fs_jpim1 zu_t = u_ice(ji,jj) + u_ice(ji-1,jj) - u_oce(ji,jj) - u_oce(ji-1,jj) ! 2*(U_ice-U_oce) at T-point zv_t = v_ice(ji,jj) + v_ice(ji,jj-1) - v_oce(ji,jj) - v_oce(ji,jj-1) zmodt = 0.25_wp * ( zu_t * zu_t + zv_t * zv_t ) ! |U_ice-U_oce|^2 ! ! update the modulus of stress at ocean surface taum (ji,jj) = frld(ji,jj) * taum(ji,jj) + ( 1._wp - frld(ji,jj) ) * rhoco * zmodt tmod_io(ji,jj) = SQRT( zmodt ) * rhoco ! rhoco*|Uice-Uoce| END DO END DO CALL lbc_lnk( taum, 'T', 1. ) ; CALL lbc_lnk( tmod_io, 'T', 1. ) ! utau_oce(:,:) = utau(:,:) !* save the air-ocean stresses at ice time-step vtau_oce(:,:) = vtau(:,:) ! ENDIF ! ! !== at each ocean time-step ==! ! DO jj = 2, jpjm1 !* ice stress over ocean WITHOUT a ice-ocean rotation angle DO ji = fs_2, fs_jpim1 ! ! ocean area at u- & v-points zfrldu = 0.5_wp * ( frld(ji,jj) + frld(ji+1,jj) ) zfrldv = 0.5_wp * ( frld(ji,jj) + frld(ji,jj+1) ) ! ! quadratic drag formulation without rotation ! ! using instantaneous surface ocean current zutau_ice = 0.5 * ( tmod_io(ji,jj) + tmod_io(ji+1,jj) ) * ( u_ice(ji,jj) - pu_oce(ji,jj) ) zvtau_ice = 0.5 * ( tmod_io(ji,jj) + tmod_io(ji,jj+1) ) * ( v_ice(ji,jj) - pv_oce(ji,jj) ) ! ! update the surface ocean stress (ice-cover wheighted) utau(ji,jj) = zfrldu * utau_oce(ji,jj) + ( 1._wp - zfrldu ) * zutau_ice vtau(ji,jj) = zfrldv * vtau_oce(ji,jj) + ( 1._wp - zfrldv ) * zvtau_ice END DO END DO CALL lbc_lnk( utau, 'U', -1. ) ; CALL lbc_lnk( vtau, 'V', -1. ) ! lateral boundary condition ! END SELECT IF(ln_ctl) CALL prt_ctl( tab2d_1=utau, clinfo1=' lim_sbc: utau : ', mask1=umask, & & tab2d_2=vtau, clinfo2=' vtau : ' , mask2=vmask ) ! CALL wrk_dealloc( jpi, jpj, ztio_u, ztio_v ) ! END SUBROUTINE lim_sbc_tau_2 SUBROUTINE lim_sbc_init_2 !!------------------------------------------------------------------- !! *** ROUTINE lim_sbc_init *** !! !! ** Purpose : Preparation of the file ice_evolu for the output of !! the temporal evolution of key variables !! !! ** input : Namelist namicedia !!------------------------------------------------------------------- ! IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) 'lim_sbc_init_2 : LIM-2 sea-ice - surface boundary condition' IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~~ ' ! ! allocate lim_sbc arrays IF( lim_sbc_alloc_2() /= 0 ) CALL ctl_stop( 'STOP', 'lim_sbc_flx_2 : unable to allocate arrays' ) ! r1_rdtice = 1._wp / rdt_ice ! soce_0(:,:) = soce ! constant SSS and ice salinity used in levitating sea-ice case sice_0(:,:) = sice ! IF( cp_cfg == "orca" ) THEN ! decrease ocean & ice reference salinities in the Baltic sea WHERE( 14._wp <= glamt(:,:) .AND. glamt(:,:) <= 32._wp .AND. & & 54._wp <= gphit(:,:) .AND. gphit(:,:) <= 66._wp ) soce_0(:,:) = 4._wp sice_0(:,:) = 2._wp END WHERE ENDIF ! ! embedded sea ice IF( nn_ice_embd /= 0 ) THEN ! mass exchanges between ice and ocean (case 1 or 2) set the snow+ice mass snwice_mass (:,:) = tms(:,:) * ( rhosn * hsnif(:,:) + rhoic * hicif(:,:) ) * ( 1.0 - frld(:,:) ) snwice_mass_b(:,:) = snwice_mass(:,:) ELSE snwice_mass (:,:) = 0.e0 ! no mass exchanges snwice_mass_b(:,:) = 0.e0 ! no mass exchanges ENDIF IF( nn_ice_embd == 2 .AND. & ! full embedment (case 2) & no restart : & .NOT.ln_rstart ) THEN ! deplete the initial ssh below sea-ice area sshn(:,:) = sshn(:,:) - snwice_mass(:,:) * r1_rau0 sshb(:,:) = sshb(:,:) - snwice_mass(:,:) * r1_rau0 ENDIF ! END SUBROUTINE lim_sbc_init_2 #else !!---------------------------------------------------------------------- !! Default option Empty module NO LIM 2.0 sea-ice model !!---------------------------------------------------------------------- #endif !!====================================================================== END MODULE limsbc_2