MODULE traisf !!============================================================================== !! *** MODULE traisf *** !! Ocean active tracers: ice shelf boundary condition !!============================================================================== !! History : 4.0 ! 2019-09 (P. Mathiot) original file !!---------------------------------------------------------------------- !!---------------------------------------------------------------------- !! tra_isf : update the tracer trend at ocean surface !!---------------------------------------------------------------------- USE isf_oce ! Ice shelf variables USE oce , ONLY : tsa ! ocean dynamics and active tracers USE dom_oce , ONLY : e3t_n, r1_e1e2t ! ocean space domain variables USE isfutils, ONLY : debug ! debug option USE timing , ONLY : timing_start, timing_stop ! Timing USE in_out_manager ! I/O manager IMPLICIT NONE PRIVATE PUBLIC tra_isf ! routine called by step.F90 !! * Substitutions # include "vectopt_loop_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/OCE 4.0 , NEMO Consortium (2018) !! $Id: trasbc.F90 10499 2019-01-10 15:12:24Z deazer $ !! Software governed by the CeCILL license (see ./LICENSE) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE tra_isf ( kt ) !!---------------------------------------------------------------------- !! *** ROUTINE tra_isf *** !! !! ** Purpose : Compute the temperature trend due to the ice shelf melting (qhoce + qhc) !! !! ** Action : - update tsa for cav, par and cpl case !!---------------------------------------------------------------------- INTEGER, INTENT(in) :: kt ! ocean time-step index !!---------------------------------------------------------------------- ! IF( ln_timing ) CALL timing_start('tra_isf') ! IF( kt == nit000 ) THEN IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) 'tra_isf : Ice shelf heat fluxes' IF(lwp) WRITE(numout,*) '~~~~~~~ ' ENDIF ! ! cavity case IF ( ln_isfcav_mlt ) CALL tra_isf_mlt(misfkt_cav, misfkb_cav, rhisf_tbl_cav, rfrac_tbl_cav, risf_cav_tsc, risf_cav_tsc_b, tsa) ! ! parametrisation case IF ( ln_isfpar_mlt ) CALL tra_isf_mlt(misfkt_par, misfkb_par, rhisf_tbl_par, rfrac_tbl_par, risf_par_tsc, risf_par_tsc_b, tsa) ! ! ice sheet coupling case IF ( ln_isfcpl ) THEN ! ! Dynamical stability at start up after change in under ice shelf cavity geometry is achieve by correcting the divergence. ! This is achieved by applying a volume flux in order to keep the horizontal divergence after remapping ! the same as at the end of the latest time step. So correction need to be apply at nit000 (euler time step) and ! half of it at nit000+1 (leap frog time step). ! in accordance to this, the heat content flux due to injected water need to be added in the temperature and salt trend ! at time step nit000 and nit000+1 IF ( kt == nit000 ) CALL tra_isf_cpl(risfcpl_tsc , tsa) IF ( kt == nit000+1) CALL tra_isf_cpl(risfcpl_tsc*0.5_wp, tsa) ! ! ensure 0 trend due to unconservation of the ice shelf coupling IF ( ln_isfcpl_cons ) CALL tra_isf_cpl(risfcpl_cons_tsc, tsa) ! END IF ! IF ( ln_isfdebug ) THEN CALL debug('tra_isf: tsa T', tsa(:,:,:,1)) CALL debug('tra_isf: tsa S', tsa(:,:,:,2)) END IF ! IF( ln_timing ) CALL timing_stop('tra_isf') ! END SUBROUTINE tra_isf ! SUBROUTINE tra_isf_mlt(ktop, kbot, phtbl, pfrac, ptsc, ptsc_b, pts) !!---------------------------------------------------------------------- !! *** ROUTINE tra_isf_mlt *** !! !! *** Purpose : Compute the temperature trend due to the ice shelf melting (qhoce + qhc) for cav or par case !! !! *** Action :: Update tsa with the surface boundary condition trend !! !!---------------------------------------------------------------------- REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(inout) :: pts !!---------------------------------------------------------------------- INTEGER , DIMENSION(jpi,jpj) , INTENT(in ) :: ktop , kbot REAL(wp), DIMENSION(jpi,jpj) , INTENT(in ) :: phtbl, pfrac REAL(wp), DIMENSION(jpi,jpj,jpts), INTENT(in ) :: ptsc , ptsc_b !!---------------------------------------------------------------------- INTEGER :: ji,jj,jk ! loop index INTEGER :: ikt, ikb ! top and bottom level of the tbl REAL(wp), DIMENSION(jpi,jpj) :: ztc ! total ice shelf tracer trend !!---------------------------------------------------------------------- ! ! compute 2d total trend due to isf ztc(:,:) = 0.5_wp * ( ptsc(:,:,jp_tem) + ptsc_b(:,:,jp_tem) ) / phtbl(:,:) ! ! update tsa DO jj = 1,jpj DO ji = 1,jpi ! ikt = ktop(ji,jj) ikb = kbot(ji,jj) ! ! level fully include in the ice shelf boundary layer DO jk = ikt, ikb - 1 pts(ji,jj,jk,jp_tem) = pts(ji,jj,jk,jp_tem) + ztc(ji,jj) END DO ! ! level partially include in ice shelf boundary layer pts(ji,jj,ikb,jp_tem) = pts(ji,jj,ikb,jp_tem) + ztc(ji,jj) * pfrac(ji,jj) ! END DO END DO ! END SUBROUTINE tra_isf_mlt ! SUBROUTINE tra_isf_cpl( ptsc, ptsa ) !!---------------------------------------------------------------------- !! *** ROUTINE tra_isf_cpl *** !! !! *** Action :: Update tsa with the ice shelf coupling trend !! !!---------------------------------------------------------------------- REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(inout) :: ptsa !!---------------------------------------------------------------------- REAL(wp), DIMENSION(jpi,jpj,jpk,jpts), INTENT(in ) :: ptsc !!---------------------------------------------------------------------- INTEGER :: jk !!---------------------------------------------------------------------- ! DO jk = 1,jpk ptsa(:,:,jk,jp_tem) = ptsa(:,:,jk,jp_tem) + ptsc(:,:,jk,jp_tem) * r1_e1e2t(:,:) / e3t_n(:,:,jk) ptsa(:,:,jk,jp_sal) = ptsa(:,:,jk,jp_sal) + ptsc(:,:,jk,jp_sal) * r1_e1e2t(:,:) / e3t_n(:,:,jk) END DO ! END SUBROUTINE tra_isf_cpl ! END MODULE traisf