MODULE iceadv !!====================================================================== !! *** MODULE iceadv *** !! LIM transport ice model : sea-ice advection/diffusion !!====================================================================== !! History : LIM-2 ! 2000-01 (M.A. Morales Maqueda, H. Goosse, and T. Fichefet) Original code !! 3.0 ! 2005-11 (M. Vancoppenolle) Multi-layer sea ice, salinity variations !! 4.0 ! 2011-02 (G. Madec) dynamical allocation !!---------------------------------------------------------------------- #if defined key_lim3 !!---------------------------------------------------------------------- !! 'key_lim3' LIM3 sea-ice model !!---------------------------------------------------------------------- !! ice_adv : advection/diffusion process of sea ice !!---------------------------------------------------------------------- USE phycst ! physical constant USE dom_oce ! ocean domain USE sbc_oce , ONLY : nn_fsbc ! frequency of sea-ice call USE ice ! sea-ice: variables USE icevar ! sea-ice: operations USE iceadv_prather ! sea-ice: advection scheme (Prather) USE iceadv_umx ! sea-ice: advection scheme (ultimate-macho) USE icectl ! sea-ice: control prints ! USE in_out_manager ! I/O manager USE lbclnk ! lateral boundary conditions -- MPP exchanges USE lib_mpp ! MPP library USE prtctl ! Print control USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) USE timing ! Timing USE iom ! IMPLICIT NONE PRIVATE PUBLIC ice_adv ! called by icestp PUBLIC ice_adv_init ! called by icestp !! * Substitution # include "vectopt_loop_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/ICE 4.0 , NEMO Consortium (2017) !! $Id: iceadv.F90 8373 2017-07-25 17:44:54Z clem $ !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE ice_adv( kt ) !!---------------------------------------------------------------------- !! *** ROUTINE ice_adv *** !! !! ** purpose : advection of sea ice !! !! ** method : variables included in the process are scalar, !! other values are considered as second order. !! For advection, one can choose between !! a) an Ultimate-Macho scheme (whose order is defined by nn_UMx) => ln_adv_UMx !! b) and a second order Prather scheme => ln_adv_Pra !! !! ** action : !!---------------------------------------------------------------------- INTEGER, INTENT(in) :: kt ! number of iteration ! INTEGER :: ji, jj, jk, jl, jt ! dummy loop indices INTEGER :: initad ! number of sub-timestep for the advection REAL(wp) :: zcfl , zusnit ! - - CHARACTER(len=80) :: cltmp ! REAL(wp) :: zvi_b, zsmv_b, zei_b, zfs_b, zfw_b, zft_b REAL(wp) :: zdv REAL(wp), DIMENSION(jpi,jpj) :: zatold, zeiold, zesold, zsmvold REAL(wp), DIMENSION(jpi,jpj,jpl) :: zhimax, zviold, zvsold !!--------------------------------------------------------------------- IF( nn_timing == 1 ) CALL timing_start('iceadv') IF( kt == nit000 .AND. lwp ) THEN WRITE(numout,*) WRITE(numout,*) 'ice_adv: sea-ice advection' WRITE(numout,*) '~~~~~~~' ENDIF CALL ice_var_agg( 1 ) ! integrated values + ato_i ! conservation test IF( ln_icediachk ) CALL ice_cons_hsm(0, 'iceadv', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) ! store old values for diag zviold (:,:,:) = v_i(:,:,:) zvsold (:,:,:) = v_s(:,:,:) zsmvold(:,:) = SUM( smv_i(:,:,:), dim=3 ) zeiold (:,:) = et_i(:,:) zesold (:,:) = et_s(:,:) ! Thickness correction init. zatold(:,:) = at_i WHERE( a_i(:,:,:) >= epsi20 ) ht_i(:,:,:) = v_i(:,:,:) / a_i(:,:,:) ht_s(:,:,:) = v_s(:,:,:) / a_i(:,:,:) ELSEWHERE ht_i(:,:,:) = 0._wp ht_s(:,:,:) = 0._wp END WHERE ! Record max of the surrounding ice thicknesses for correction in case advection creates ice too thick zhimax(:,:,:) = ht_i(:,:,:) + ht_s(:,:,:) DO jl = 1, jpl DO jj = 2, jpjm1 DO ji = 2, jpim1 !!gm use of MAXVAL here is very probably less efficient than expending the 9 values zhimax(ji,jj,jl) = MAX( epsi20, MAXVAL( ht_i(ji-1:ji+1,jj-1:jj+1,jl) + ht_s(ji-1:ji+1,jj-1:jj+1,jl) ) ) END DO END DO END DO CALL lbc_lnk( zhimax(:,:,:), 'T', 1. ) !---------- ! Advection !---------- IF( ln_adv_UMx ) THEN !-- ULTIMATE-MACHO scheme CALL ice_adv_umx( kt, u_ice, v_ice, & & ato_i, v_i, v_s, smv_i, oa_i, a_i, a_ip, v_ip, e_s, e_i ) ELSEIF( ln_adv_Pra ) THEN !-- PRATHER scheme CALL ice_adv_prather( kt, u_ice, v_ice, & & ato_i, v_i, v_s, smv_i, oa_i, a_i, a_ip, v_ip, e_s, e_i ) ENDIF ! total ice fraction at_i(:,:) = a_i(:,:,1) DO jl = 2, jpl at_i(:,:) = at_i(:,:) + a_i(:,:,jl) END DO !------------ ! diagnostics !------------ DO jj = 1, jpj DO ji = 1, jpi diag_trp_ei (ji,jj) = ( SUM( e_i (ji,jj,1:nlay_i,:) ) - zeiold(ji,jj) ) * r1_rdtice diag_trp_es (ji,jj) = ( SUM( e_s (ji,jj,1:nlay_s,:) ) - zesold(ji,jj) ) * r1_rdtice diag_trp_smv(ji,jj) = ( SUM( smv_i(ji,jj,:) ) - zsmvold(ji,jj) ) * r1_rdtice diag_trp_vi (ji,jj) = SUM( v_i(ji,jj,:) - zviold(ji,jj,:) ) * r1_rdtice diag_trp_vs (ji,jj) = SUM( v_s(ji,jj,:) - zvsold(ji,jj,:) ) * r1_rdtice END DO END DO IF( iom_use('icetrp') ) CALL iom_put( "icetrp" , diag_trp_vi * rday ) ! ice volume transport IF( iom_use('snwtrp') ) CALL iom_put( "snwtrp" , diag_trp_vs * rday ) ! snw volume transport IF( iom_use('saltrp') ) CALL iom_put( "saltrp" , diag_trp_smv * rday * rhoic ) ! salt content transport IF( iom_use('deitrp') ) CALL iom_put( "deitrp" , diag_trp_ei ) ! advected ice enthalpy (W/m2) IF( iom_use('destrp') ) CALL iom_put( "destrp" , diag_trp_es ) ! advected snw enthalpy (W/m2) !-------------------------------------- ! Thickness correction in case too high !-------------------------------------- IF( nn_icedyn == 2 ) THEN ! CALL ice_var_zapsmall !-- zap small areas ! DO jl = 1, jpl DO jj = 1, jpj DO ji = 1, jpi IF ( v_i(ji,jj,jl) > 0._wp ) THEN !-- bound to zhimax ! ht_i (ji,jj,jl) = v_i (ji,jj,jl) / a_i(ji,jj,jl) ht_s (ji,jj,jl) = v_s (ji,jj,jl) / a_i(ji,jj,jl) zdv = v_i(ji,jj,jl) + v_s(ji,jj,jl) - zviold(ji,jj,jl) - zvsold(ji,jj,jl) ! IF ( ( zdv > 0.0 .AND. (ht_i(ji,jj,jl)+ht_s(ji,jj,jl)) > zhimax(ji,jj,jl) .AND. zatold(ji,jj) < 0.80 ) .OR. & & ( zdv <= 0.0 .AND. (ht_i(ji,jj,jl)+ht_s(ji,jj,jl)) > zhimax(ji,jj,jl) ) ) THEN a_i (ji,jj,jl) = ( v_i(ji,jj,jl) + v_s(ji,jj,jl) ) / zhimax(ji,jj,jl) ht_i(ji,jj,jl) = v_i(ji,jj,jl) / a_i(ji,jj,jl) ENDIF ! ENDIF END DO END DO END DO WHERE( ht_i(:,:,jpl) > hi_max(jpl) ) !-- bound ht_i to hi_max (99 m) ht_i(:,:,jpl) = hi_max(jpl) a_i (:,:,jpl) = v_i(:,:,jpl) / hi_max(jpl) END WHERE IF ( nn_pnd_scheme > 0 ) THEN !-- correct pond fraction to avoid a_ip > a_i WHERE( a_ip(:,:,:) > a_i(:,:,:) ) a_ip(:,:,:) = a_i(:,:,:) ENDIF ! ENDIF !------------------------------------------------------------ ! Impose a_i < amax if no ridging/rafting or in mono-category !------------------------------------------------------------ IF( l_piling ) THEN !-- simple conservative piling, comparable with 1-cat models at_i(:,:) = SUM( a_i(:,:,:), dim=3 ) DO jl = 1, jpl WHERE( at_i(:,:) > epsi20 ) a_i(:,:,jl) = a_i(:,:,jl) * ( 1._wp + MIN( rn_amax_2d(:,:) - at_i(:,:) , 0._wp ) / at_i(:,:) ) END WHERE END DO ENDIF ! agglomerate variables vt_i(:,:) = SUM( v_i(:,:,:), dim=3 ) vt_s(:,:) = SUM( v_s(:,:,:), dim=3 ) at_i(:,:) = SUM( a_i(:,:,:), dim=3 ) ! MV MP 2016 (remove once we get rid of a_i_frac and ht_i) IF ( nn_pnd_scheme > 0 ) THEN at_ip(:,:) = SUM( a_ip(:,:,:), dim = 3 ) vt_ip(:,:) = SUM( v_ip(:,:,:), dim = 3 ) ENDIF ! END MP 2016 ! open water = 1 if at_i=0 WHERE( at_i == 0._wp ) ato_i = 1._wp ! conservation test IF( ln_icediachk ) CALL ice_cons_hsm(1, 'iceadv', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) ! -------------- ! control prints ! -------------- IF( ln_icectl ) CALL ice_prt( kt, iiceprt, jiceprt,-1, ' - ice dyn & trp - ' ) ! IF( nn_timing == 1 ) CALL timing_stop('iceadv') ! END SUBROUTINE ice_adv SUBROUTINE ice_adv_init !!------------------------------------------------------------------- !! *** ROUTINE ice_adv_init *** !! !! ** Purpose : Physical constants and parameters linked to the ice !! dynamics !! !! ** Method : Read the namice_adv namelist and check the ice-dynamic !! parameter values called at the first timestep (nit000) !! !! ** input : Namelist namice_adv !!------------------------------------------------------------------- INTEGER :: ios ! Local integer output status for namelist read !! NAMELIST/namice_adv/ ln_adv_Pra, ln_adv_UMx, nn_UMx !!------------------------------------------------------------------- ! REWIND( numnam_ice_ref ) ! Namelist namice_adv in reference namelist : Ice dynamics READ ( numnam_ice_ref, namice_adv, IOSTAT = ios, ERR = 901) 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namice_adv in reference namelist', lwp ) ! REWIND( numnam_ice_cfg ) ! Namelist namice_adv in configuration namelist : Ice dynamics READ ( numnam_ice_cfg, namice_adv, IOSTAT = ios, ERR = 902 ) 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namice_adv in configuration namelist', lwp ) IF(lwm) WRITE ( numoni, namice_adv ) ! IF(lwp) THEN ! control print WRITE(numout,*) WRITE(numout,*) 'ice_adv_init: ice parameters for ice dynamics ' WRITE(numout,*) '~~~~~~~~~~~~' WRITE(numout,*) ' Namelist namice_adv' WRITE(numout,*) ' advection scheme for ice transport (limtrp)' WRITE(numout,*) ' type of advection scheme (Prather) ln_adv_Pra = ', ln_adv_Pra WRITE(numout,*) ' type of advection scheme (Ulimate-Macho) ln_adv_UMx = ', ln_adv_UMx WRITE(numout,*) ' order of the Ultimate-Macho scheme nn_UMx = ', nn_UMx ENDIF ! IF ( ( ln_adv_Pra .AND. ln_adv_UMx ) .OR. ( .NOT.ln_adv_Pra .AND. .NOT.ln_adv_UMx ) ) THEN CALL ctl_stop( 'ice_adv_init: choose one and only one ice advection scheme (ln_adv_Pra or ln_adv_UMx)' ) ENDIF ! END SUBROUTINE ice_adv_init #else !!---------------------------------------------------------------------- !! Default option Empty Module No sea-ice model !!---------------------------------------------------------------------- #endif !!====================================================================== END MODULE iceadv