MODULE icecor !!====================================================================== !! *** MODULE icecor *** !! LIM-3 : Update of sea-ice global variables at the end of the time step !!====================================================================== !! History : 3.0 ! 2006-04 (M. Vancoppenolle) Original code !! 3.5 ! 2014-06 (C. Rousset) Complete rewriting/cleaning !!---------------------------------------------------------------------- #if defined key_lim3 !!---------------------------------------------------------------------- !! 'key_lim3' LIM3 sea-ice model !!---------------------------------------------------------------------- !! ice_cor : computes update of sea-ice global variables from trend terms !!---------------------------------------------------------------------- USE dom_oce USE phycst ! physical constants USE ice USE ice1D ! LIM thermodynamic sea-ice variables USE iceitd USE icevar USE icectl ! control prints ! USE in_out_manager ! I/O manager USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) USE lbclnk ! lateral boundary condition - MPP link USE lib_mpp ! MPP library USE timing ! Timing IMPLICIT NONE PRIVATE PUBLIC ice_cor !! * Substitutions # include "vectopt_loop_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011) !! $Id: icecor.F90 8378 2017-07-26 13:55:59Z clem $ !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE ice_cor( kt , kn ) !!------------------------------------------------------------------- !! *** ROUTINE ice_cor *** !! !! ** Purpose : Computes update of sea-ice global variables at !! the end of the dynamics. !! !!--------------------------------------------------------------------- INTEGER, INTENT(in) :: kt ! number of iteration INTEGER, INTENT(in) :: kn ! 1 = after dyn ; 2 = after thermo INTEGER :: ji, jj, jk, jl ! dummy loop indices REAL(wp) :: zsal REAL(wp) :: zvi_b, zsmv_b, zei_b, zfs_b, zfw_b, zft_b !!------------------------------------------------------------------- IF( nn_timing == 1 ) CALL timing_start('icecor') IF( kt == nit000 .AND. lwp .AND. kn == 2 ) THEN WRITE(numout,*) WRITE(numout,*)' icecor ' WRITE(numout,*)' ~~~~~~ ' ENDIF ! conservation test IF( ln_limdiachk ) CALL ice_cons_hsm(0, 'icecor', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) !---------------------------------------------------------------------- ! Constrain the thickness of the smallest category above himin !---------------------------------------------------------------------- IF( kn == 2 ) THEN DO jj = 1, jpj DO ji = 1, jpi rswitch = MAX( 0._wp , SIGN( 1._wp, a_i(ji,jj,1) - epsi20 ) ) !0 if no ice and 1 if yes ht_i(ji,jj,1) = v_i (ji,jj,1) / MAX( a_i(ji,jj,1) , epsi20 ) * rswitch IF( v_i(ji,jj,1) > 0._wp .AND. ht_i(ji,jj,1) < rn_himin ) THEN a_i (ji,jj,1) = a_i (ji,jj,1) * ht_i(ji,jj,1) / rn_himin ENDIF END DO END DO ENDIF !---------------------------------------------------- ! ice concentration should not exceed amax !----------------------------------------------------- at_i(:,:) = 0._wp DO jl = 1, jpl at_i(:,:) = a_i(:,:,jl) + at_i(:,:) END DO DO jl = 1, jpl DO jj = 1, jpj DO ji = 1, jpi IF( at_i(ji,jj) > rn_amax_2d(ji,jj) .AND. a_i(ji,jj,jl) > 0._wp ) THEN a_i (ji,jj,jl) = a_i (ji,jj,jl) * ( 1._wp - ( 1._wp - rn_amax_2d(ji,jj) / at_i(ji,jj) ) ) ENDIF END DO END DO END DO !--------------------- ! Ice salinity bounds !--------------------- IF ( nn_icesal == 2 ) THEN DO jl = 1, jpl DO jj = 1, jpj DO ji = 1, jpi zsal = smv_i(ji,jj,jl) ! salinity stays in bounds rswitch = 1._wp - MAX( 0._wp, SIGN( 1._wp, - v_i(ji,jj,jl) ) ) smv_i(ji,jj,jl) = rswitch * MAX( MIN( rn_simax * v_i(ji,jj,jl), smv_i(ji,jj,jl) ), rn_simin * v_i(ji,jj,jl) ) ! associated salt flux sfx_res(ji,jj) = sfx_res(ji,jj) - ( smv_i(ji,jj,jl) - zsal ) * rhoic * r1_rdtice END DO END DO END DO ENDIF !---------------------------------------------------- ! Rebin categories with thickness out of bounds !---------------------------------------------------- IF ( jpl > 1 ) CALL ice_itd_reb !----------------- ! zap small values !----------------- CALL ice_var_zapsmall !---------------------------------------------- ! Ice drift. Corrections to avoid wrong values !---------------------------------------------- IF( kn == 2 ) THEN DO jj = 2, jpjm1 DO ji = 2, jpim1 IF ( at_i(ji,jj) == 0._wp ) THEN ! what to do if there is no ice IF ( at_i(ji+1,jj) == 0._wp ) u_ice(ji,jj) = 0._wp ! right side IF ( at_i(ji-1,jj) == 0._wp ) u_ice(ji-1,jj) = 0._wp ! left side IF ( at_i(ji,jj+1) == 0._wp ) v_ice(ji,jj) = 0._wp ! upper side IF ( at_i(ji,jj-1) == 0._wp ) v_ice(ji,jj-1) = 0._wp ! bottom side ENDIF END DO END DO !lateral boundary conditions CALL lbc_lnk_multi( u_ice, 'U', -1., v_ice, 'V', -1. ) !mask velocities u_ice(:,:) = u_ice(:,:) * umask(:,:,1) v_ice(:,:) = v_ice(:,:) * vmask(:,:,1) ENDIF ! ------------------------------------------------- ! Diagnostics ! ------------------------------------------------- IF( kn == 1 ) THEN DO jl = 1, jpl afx_dyn(:,:) = afx_dyn(:,:) + ( a_i(:,:,jl) - a_i_b(:,:,jl) ) * r1_rdtice END DO DO jj = 1, jpj DO ji = 1, jpi ! heat content variation (W.m-2) diag_heat(ji,jj) = - ( SUM( e_i(ji,jj,1:nlay_i,:) - e_i_b(ji,jj,1:nlay_i,:) ) + & & SUM( e_s(ji,jj,1:nlay_s,:) - e_s_b(ji,jj,1:nlay_s,:) ) & & ) * r1_rdtice ! salt, volume diag_smvi(ji,jj) = SUM( smv_i(ji,jj,:) - smv_i_b(ji,jj,:) ) * rhoic * r1_rdtice diag_vice(ji,jj) = SUM( v_i (ji,jj,:) - v_i_b (ji,jj,:) ) * rhoic * r1_rdtice diag_vsnw(ji,jj) = SUM( v_s (ji,jj,:) - v_s_b (ji,jj,:) ) * rhosn * r1_rdtice END DO END DO ELSEIF( kn == 2 ) THEN DO jl = 1, jpl oa_i(:,:,jl) = oa_i(:,:,jl) + a_i(:,:,jl) * rdt_ice ! ice natural aging afx_thd(:,:) = afx_thd(:,:) + ( a_i(:,:,jl) - a_i_b(:,:,jl) ) * r1_rdtice END DO afx_tot = afx_thd + afx_dyn DO jj = 1, jpj DO ji = 1, jpi ! heat content variation (W.m-2) diag_heat(ji,jj) = diag_heat(ji,jj) - & & ( SUM( e_i(ji,jj,1:nlay_i,:) - e_i_b(ji,jj,1:nlay_i,:) ) + & & SUM( e_s(ji,jj,1:nlay_s,:) - e_s_b(ji,jj,1:nlay_s,:) ) & & ) * r1_rdtice ! salt, volume diag_smvi(ji,jj) = diag_smvi(ji,jj) + SUM( smv_i(ji,jj,:) - smv_i_b(ji,jj,:) ) * rhoic * r1_rdtice diag_vice(ji,jj) = diag_vice(ji,jj) + SUM( v_i (ji,jj,:) - v_i_b (ji,jj,:) ) * rhoic * r1_rdtice diag_vsnw(ji,jj) = diag_vsnw(ji,jj) + SUM( v_s (ji,jj,:) - v_s_b (ji,jj,:) ) * rhosn * r1_rdtice END DO END DO ENDIF ! conservation test IF( ln_limdiachk ) CALL ice_cons_hsm(1, 'icecor', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) ! control prints IF( ln_ctl ) CALL ice_prt3D( 'icecor' ) IF( ln_limctl .AND. kn == 2 ) & & CALL ice_prt( kt, iiceprt, jiceprt, 2, ' - Final state - ' ) IF( nn_timing == 1 ) CALL timing_stop('icecor') END SUBROUTINE ice_cor #endif END MODULE icecor