MODULE dommsk !!====================================================================== !! *** MODULE dommsk *** !! Ocean initialization : domain land/sea mask !!====================================================================== !! History : OPA ! 1987-07 (G. Madec) Original code !! 6.0 ! 1993-03 (M. Guyon) symetrical conditions (M. Guyon) !! 7.0 ! 1996-01 (G. Madec) suppression of common work arrays !! - ! 1996-05 (G. Madec) mask computed from tmask !! 8.0 ! 1997-02 (G. Madec) mesh information put in domhgr.F !! 8.1 ! 1997-07 (G. Madec) modification of kbat and fmask !! - ! 1998-05 (G. Roullet) free surface !! 8.2 ! 2000-03 (G. Madec) no slip accurate !! - ! 2001-09 (J.-M. Molines) Open boundaries !! NEMO 1.0 ! 2002-08 (G. Madec) F90: Free form and module !! - ! 2005-11 (V. Garnier) Surface pressure gradient organization !! 3.2 ! 2009-07 (R. Benshila) Suppression of rigid-lid option !! 3.6 ! 2015-05 (P. Mathiot) ISF: add wmask,wumask and wvmask !! 4.0 ! 2016-06 (G. Madec, S. Flavoni) domain configuration / user defined interface !! 4.x ! 2020-02 (G. Madec, S. Techene) introduce ssh to h0 ratio !!---------------------------------------------------------------------- !!---------------------------------------------------------------------- !! dom_msk : compute land/ocean mask !!---------------------------------------------------------------------- USE oce ! ocean dynamics and tracers USE dom_oce ! ocean space and time domain USE domutl ! USE usrdef_fmask ! user defined fmask USE bdy_oce ! open boundary ! USE in_out_manager ! I/O manager USE iom ! IOM library USE lbclnk ! ocean lateral boundary conditions (or mpp link) USE lib_mpp ! Massively Parallel Processing library IMPLICIT NONE PRIVATE PUBLIC dom_msk ! routine called by inidom.F90 ! !!* Namelist namlbc : lateral boundary condition * REAL(wp) :: rn_shlat ! type of lateral boundary condition on velocity LOGICAL, PUBLIC :: ln_vorlat ! consistency of vorticity boundary condition ! with analytical eqs. !! * Substitutions # include "do_loop_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/OCE 4.0 , NEMO Consortium (2018) !! $Id$ !! Software governed by the CeCILL license (see ./LICENSE) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE dom_msk( k_top, k_bot ) !!--------------------------------------------------------------------- !! *** ROUTINE dom_msk *** !! !! ** Purpose : Compute land/ocean mask arrays at tracer points, hori- !! zontal velocity points (u & v), vorticity points (f) points. !! !! ** Method : The ocean/land mask at t-point is deduced from ko_top !! and ko_bot, the indices of the fist and last ocean t-levels which !! are either defined in usrdef_zgr or read in zgr_read. !! The velocity masks (umask, vmask, wmask, wumask, wvmask) !! are deduced from a product of the two neighboring tmask. !! The vorticity mask (fmask) is deduced from tmask taking !! into account the choice of lateral boundary condition (rn_shlat) : !! rn_shlat = 0, free slip (no shear along the coast) !! rn_shlat = 2, no slip (specified zero velocity at the coast) !! 0 < rn_shlat < 2, partial slip | non-linear velocity profile !! 2 < rn_shlat, strong slip | in the lateral boundary layer !! !! tmask_i : interior ocean mask at t-point, i.e. excluding duplicated !! rows/lines due to cyclic or North Fold boundaries as well !! as MPP halos. !! tmask_h : halo mask at t-point, i.e. excluding duplicated rows/lines !! due to cyclic or North Fold boundaries as well as MPP halos. !! !! ** Action : tmask, umask, vmask, wmask, wumask, wvmask : land/ocean mask !! at t-, u-, v- w, wu-, and wv-points (=0. or 1.) !! fmask : land/ocean mask at f-point (=0., or =1., or !! =rn_shlat along lateral boundaries) !! tmask_i : interior ocean mask !! tmask_h : halo mask !! ssmask , ssumask, ssvmask, ssfmask : 2D ocean mask !!---------------------------------------------------------------------- INTEGER, DIMENSION(:,:), INTENT(in) :: k_top, k_bot ! first and last ocean level ! INTEGER :: ji, jj, jk ! dummy loop indices INTEGER :: iktop, ikbot ! - - INTEGER :: ios, inum !! NAMELIST/namlbc/ rn_shlat, ln_vorlat NAMELIST/nambdy/ ln_bdy ,nb_bdy, ln_coords_file, cn_coords_file, & & ln_mask_file, cn_mask_file, cn_dyn2d, nn_dyn2d_dta, & & cn_dyn3d, nn_dyn3d_dta, cn_tra, nn_tra_dta, & & ln_tra_dmp, ln_dyn3d_dmp, rn_time_dmp, rn_time_dmp_out, & & cn_ice, nn_ice_dta, & & ln_vol, nn_volctl, nn_rimwidth !!--------------------------------------------------------------------- ! READ ( numnam_ref, namlbc, IOSTAT = ios, ERR = 901 ) 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namlbc in reference namelist' ) READ ( numnam_cfg, namlbc, IOSTAT = ios, ERR = 902 ) 902 IF( ios > 0 ) CALL ctl_nam ( ios , 'namlbc in configuration namelist' ) IF(lwm) WRITE ( numond, namlbc ) IF(lwp) THEN ! control print WRITE(numout,*) WRITE(numout,*) 'dommsk : ocean mask ' WRITE(numout,*) '~~~~~~' WRITE(numout,*) ' Namelist namlbc' WRITE(numout,*) ' lateral momentum boundary cond. rn_shlat = ',rn_shlat WRITE(numout,*) ' consistency with analytical form ln_vorlat = ',ln_vorlat ENDIF ! IF(lwp) WRITE(numout,*) IF ( rn_shlat == 0. ) THEN ; IF(lwp) WRITE(numout,*) ' ==>>> ocean lateral free-slip' ELSEIF ( rn_shlat == 2. ) THEN ; IF(lwp) WRITE(numout,*) ' ==>>> ocean lateral no-slip' ELSEIF ( 0. < rn_shlat .AND. rn_shlat < 2. ) THEN ; IF(lwp) WRITE(numout,*) ' ==>>> ocean lateral partial-slip' ELSEIF ( 2. < rn_shlat ) THEN ; IF(lwp) WRITE(numout,*) ' ==>>> ocean lateral strong-slip' ELSE CALL ctl_stop( 'dom_msk: wrong value for rn_shlat (i.e. a negalive value). We stop.' ) ENDIF ! Ocean/land mask at t-point (computed from ko_top and ko_bot) ! ---------------------------- ! tmask(:,:,:) = 0._wp DO_2D( nn_hls, nn_hls, nn_hls, nn_hls ) iktop = k_top(ji,jj) ikbot = k_bot(ji,jj) IF( iktop /= 0 ) THEN ! water in the column tmask(ji,jj,iktop:ikbot) = 1._wp ENDIF END_2D ! ! Mask corrections for bdy (read in mppini2) READ ( numnam_ref, nambdy, IOSTAT = ios, ERR = 903) 903 IF( ios /= 0 ) CALL ctl_nam ( ios , 'nambdy in reference namelist' ) READ ( numnam_cfg, nambdy, IOSTAT = ios, ERR = 904 ) 904 IF( ios > 0 ) CALL ctl_nam ( ios , 'nambdy in configuration namelist' ) ! ------------------------ IF ( ln_bdy .AND. ln_mask_file ) THEN CALL iom_open( cn_mask_file, inum ) CALL iom_get ( inum, jpdom_global, 'bdy_msk', bdytmask(:,:) ) CALL iom_close( inum ) DO_3D( 1, 1, 1, 1, 1, jpkm1 ) tmask(ji,jj,jk) = tmask(ji,jj,jk) * bdytmask(ji,jj) END_3D ENDIF ! Ocean/land mask at u-, v-, and f-points (computed from tmask) ! ---------------------------------------- ! NB: at this point, fmask is designed for free slip lateral boundary condition DO_3D( 0, 0, 0, 0, 1, jpk ) umask(ji,jj,jk) = tmask(ji,jj ,jk) * tmask(ji+1,jj ,jk) vmask(ji,jj,jk) = tmask(ji,jj ,jk) * tmask(ji ,jj+1,jk) fmask(ji,jj,jk) = tmask(ji,jj ,jk) * tmask(ji+1,jj ,jk) & & * tmask(ji,jj+1,jk) * tmask(ji+1,jj+1,jk) END_3D CALL lbc_lnk_multi( 'dommsk', umask, 'U', 1.0_wp, vmask, 'V', 1.0_wp, fmask, 'F', 1.0_wp ) ! Lateral boundary conditions ! Ocean/land mask at wu-, wv- and w points (computed from tmask) !----------------------------------------- wmask (:,:,1) = tmask(:,:,1) ! surface wumask(:,:,1) = umask(:,:,1) wvmask(:,:,1) = vmask(:,:,1) DO jk = 2, jpk ! interior values wmask (:,:,jk) = tmask(:,:,jk) * tmask(:,:,jk-1) wumask(:,:,jk) = umask(:,:,jk) * umask(:,:,jk-1) wvmask(:,:,jk) = vmask(:,:,jk) * vmask(:,:,jk-1) END DO ! Ocean/land column mask at t-, u-, and v-points (i.e. at least 1 wet cell in the vertical) ! ---------------------------------------------- ssmask (:,:) = MAXVAL( tmask(:,:,:), DIM=3 ) ssumask(:,:) = MAXVAL( umask(:,:,:), DIM=3 ) ssvmask(:,:) = MAXVAL( vmask(:,:,:), DIM=3 ) ssfmask(:,:) = MAXVAL( fmask(:,:,:), DIM=3 ) ! Interior domain mask (used for global sum) ! -------------------- ! CALL dom_uniq( tmask_h, 'T' ) ! ! ! interior mask : 2D ocean mask x halo mask tmask_i(:,:) = ssmask(:,:) * tmask_h(:,:) ! Lateral boundary conditions on velocity (modify fmask) ! --------------------------------------- IF( rn_shlat /= 0 ) THEN ! Not free-slip lateral boundary condition ! DO jk = 1, jpk DO_2D( 0, 0, 0, 0 ) IF( fmask(ji,jj,jk) == 0._wp ) THEN fmask(ji,jj,jk) = rn_shlat * MIN( 1._wp , MAX( umask(ji,jj,jk), umask(ji,jj+1,jk), & & vmask(ji,jj,jk), vmask(ji+1,jj,jk) ) ) ENDIF END_2D DO jj = 2, jpjm1 IF( fmask(1,jj,jk) == 0._wp ) THEN fmask(1 ,jj,jk) = rn_shlat * MIN( 1._wp , MAX( vmask(2,jj,jk), umask(1,jj+1,jk), umask(1,jj,jk) ) ) ENDIF IF( fmask(jpi,jj,jk) == 0._wp ) THEN fmask(jpi,jj,jk) = rn_shlat * MIN( 1._wp , MAX( umask(jpi,jj+1,jk), vmask(jpim1,jj,jk), umask(jpi,jj-1,jk) ) ) ENDIF END DO DO ji = 2, jpim1 IF( fmask(ji,1,jk) == 0._wp ) THEN fmask(ji, 1 ,jk) = rn_shlat * MIN( 1._wp , MAX( vmask(ji+1,1,jk), umask(ji,2,jk), vmask(ji,1,jk) ) ) ENDIF IF( fmask(ji,jpj,jk) == 0._wp ) THEN fmask(ji,jpj,jk) = rn_shlat * MIN( 1._wp , MAX( vmask(ji+1,jpj,jk), vmask(ji-1,jpj,jk), umask(ji,jpjm1,jk) ) ) ENDIF END DO END DO ! CALL lbc_lnk( 'dommsk', fmask, 'F', 1._wp ) ! Lateral boundary conditions on fmask ! ! CAUTION : The fmask may be further modified in dyn_vor_init ( dynvor.F90 ) depending on ln_vorlat ! ENDIF ! User defined alteration of fmask (use to reduce ocean transport in specified straits) ! -------------------------------- ! CALL usr_def_fmask( cn_cfg, nn_cfg, fmask ) ! END SUBROUTINE dom_msk !!====================================================================== END MODULE dommsk