MODULE isfpar !!====================================================================== !! *** MODULE isfpar *** !! ice shelf module : update ocean boundary condition under ice !! shelf !!====================================================================== !! History : 3.2 ! 2011-02 (C.Harris ) Original code isf cav !! X.X ! 2006-02 (C. Wang ) Original code bg03 !! 3.4 ! 2013-03 (P. Mathiot) Merging + parametrization !! 4.1 ! 2019-09 (P. Mathiot) Restructuration !!---------------------------------------------------------------------- !!---------------------------------------------------------------------- !! isfpar : compute ice shelf melt using a prametrisation of ice shelf cavities !!---------------------------------------------------------------------- USE oce ! ocean dynamics and tracers USE isf ! ice shelf USE isfutils ! USE isfparmlt ! ice shelf parametrisation USE isftbl ! ice shelf depth average USE isfdiags ! ice shelf diagnostics USE dom_oce ! ocean space and time domain USE phycst ! physical constants USE eosbn2 ! equation of state ! USE in_out_manager ! I/O manager USE iom ! I/O library USE fldread ! read input field at current time step USE lbclnk ! IMPLICIT NONE PRIVATE PUBLIC isf_par, isf_par_init !!---------------------------------------------------------------------- !! NEMO/OCE 4.0 , NEMO Consortium (2018) !! $Id: sbcisf.F90 10536 2019-01-16 19:21:09Z mathiot $ !! Software governed by the CeCILL license (see ./LICENSE) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE isf_par( kt, ptsc, pqfwf ) !!--------------------------------------------------------------------- !! *** ROUTINE isf_par *** !! !! ** Purpose : compute the heat and fresh water due to ice shelf melting/freezing using a parametrisation !! !!--------------------------------------------------------------------- !!-------------------------- OUT -------------------------------------- REAL(wp), DIMENSION(jpi,jpj) , INTENT(inout) :: pqfwf REAL(wp), DIMENSION(jpi,jpj,jpts), INTENT(inout) :: ptsc !!-------------------------- IN -------------------------------------- INTEGER, INTENT(in) :: kt ! ocean time step !!--------------------------------------------------------------------- REAL(wp), DIMENSION(jpi,jpj) :: zqoce, zqhc, zqlat, zqh !!--------------------------------------------------------------------- ! ! compute heat content, latent heat and melt fluxes (2d) CALL isfpar_mlt( kt, zqhc, zqoce, pqfwf ) ! ! compute heat and water flux (change signe directly in the melt subroutine) pqfwf(:,:) = pqfwf(:,:) * mskisf_par(:,:) zqoce(:,:) = zqoce(:,:) * mskisf_par(:,:) zqhc (:,:) = zqhc(:,:) * mskisf_par(:,:) ! ! compute heat content flux zqlat(:,:) = pqfwf(:,:) * rLfusisf ! 2d latent heat flux (W/m2) ! ! total heat flux zqh(:,:) = ( zqhc (:,:) + zqoce(:,:) ) ! ! lbclnk on melt and heat fluxes CALL lbc_lnk_multi( 'isfmlt', zqh, 'T', 1., pqfwf, 'T', 1.) ! ! output fluxes CALL isf_diags_flx( misfkt_par, misfkb_par, rhisf_tbl_par, rfrac_tbl_par, 'par', pqfwf, zqoce, zqlat, zqhc) ! ! set temperature content ptsc(:,:,jp_tem) = zqh(:,:) * r1_rau0_rcp ! END SUBROUTINE isf_par SUBROUTINE isf_par_init !!--------------------------------------------------------------------- !! *** ROUTINE isf_par_init *** !! !! ** Purpose : initialisation of the variable needed for the parametrisation of ice shelf melt !! !!---------------------------------------------------------------------- INTEGER :: ierr REAL(wp), DIMENSION(jpi,jpj) :: ztblmax, ztblmin !!---------------------------------------------------------------------- ! ! allocation CALL isf_alloc_par() ! ! par misfkt_par(:,:) = 1 ; misfkb_par(:,:) = 1 rhisf_tbl_par(:,:) = 1e-20 ; rfrac_tbl_par(:,:) = 0.0_wp ! mskisf_par(:,:) = 0 ! ! define isf tbl tickness, top and bottom indice CALL read_2dcstdta(TRIM(sn_isfpar_zmax%clname), TRIM(sn_isfpar_zmax%clvar), ztblmax) CALL read_2dcstdta(TRIM(sn_isfpar_zmin%clname), TRIM(sn_isfpar_zmin%clvar), ztblmin) ! ! mask ice shelf parametrisation location ztblmax(:,:) = ztblmax(:,:) * ssmask(:,:) ztblmin(:,:) = ztblmin(:,:) * ssmask(:,:) ! ! if param used under an ice shelf overwrite ztblmax by the ice shelf draft WHERE ( risfdep > 0._wp .AND. ztblmin > 0._wp ) ztblmin(:,:) = risfdep(:,:) END WHERE ! ! compute ktop CALL isf_tbl_ktop(ztblmin, misfkt_par) ! ! initial tbl thickness rhisf0_tbl_par(:,:) = ztblmax(:,:) - ztblmin(:,:) ! ! define iceshelf parametrisation mask mskisf_par = 0 WHERE ( ztblmax > 0._wp ) mskisf_par(:,:) = 1._wp END WHERE ! ! compute misfkb_par, rhisf_tbl rhisf_tbl_par(:,:) = rhisf0_tbl_par(:,:) CALL isf_tbl_lvl( ht_n * mskisf_par, e3t_n, misfkt_par, misfkb_par, rhisf_tbl_par, rfrac_tbl_par ) ! SELECT CASE ( TRIM(cn_isfpar_mlt) ) ! CASE ( 'spe' ) ! ALLOCATE( sf_isfpar_fwf(1), STAT=ierr ) ALLOCATE( sf_isfpar_fwf(1)%fnow(jpi,jpj,1), sf_isfpar_fwf(1)%fdta(jpi,jpj,1,2) ) CALL fld_fill( sf_isfpar_fwf, (/ sn_isfpar_fwf /), cn_isfdir, 'isf_par_init', 'read fresh water flux isf data', 'namisf' ) ! IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) ' ==>>> ice melt read from forcing field (cn_isfmlt_par = spe)' ! CASE ( 'bg03' ) ! IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) ' ==>>> bg03 parametrisation (cn_isfmlt_par = bg03)' ! ! read effective length CALL read_2dcstdta(TRIM(sn_isfpar_Leff%clname), TRIM(sn_isfpar_Leff%clvar), risfLeff) risfLeff = risfLeff*1000.0_wp !: convertion in m ! CASE ( 'oasis' ) ! IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) ' ==>>> isf melt provided by OASIS (cn_isfmlt_par = oasis)' ! CASE DEFAULT CALL ctl_stop( 'sbc_isf_init: wrong value of nn_isf' ) END SELECT ! END SUBROUTINE isf_par_init END MODULE isfpar