MODULE dynspg_ts !!====================================================================== !! History : 1.0 ! 2004-12 (L. Bessieres, G. Madec) Original code !! - ! 2005-11 (V. Garnier, G. Madec) optimization !! - ! 2006-08 (S. Masson) distributed restart using iom !! 2.0 ! 2007-07 (D. Storkey) calls to BDY routines !! - ! 2008-01 (R. Benshila) change averaging method !! 3.2 ! 2009-07 (R. Benshila, G. Madec) Complete revisit associated to vvl reactivation !! 3.3 ! 2010-09 (D. Storkey, E. O'Dea) update for BDY for Shelf configurations !! 3.3 ! 2011-03 (R. Benshila, R. Hordoir, P. Oddo) update calculation of ub_b !! 3.5 ! 2013-07 (J. Chanut) Switch to Forward-backward time stepping !! 3.6 ! 2013-11 (A. Coward) Update for z-tilde compatibility !!--------------------------------------------------------------------- #if defined key_dynspg_ts || defined key_esopa !!---------------------------------------------------------------------- !! 'key_dynspg_ts' split explicit free surface !!---------------------------------------------------------------------- !! dyn_spg_ts : compute surface pressure gradient trend using a time- !! splitting scheme and add to the general trend !!---------------------------------------------------------------------- USE oce ! ocean dynamics and tracers USE dom_oce ! ocean space and time domain USE sbc_oce ! surface boundary condition: ocean USE sbcisf ! ice shelf variable (fwfisf) USE dynspg_oce ! surface pressure gradient variables USE phycst ! physical constants USE dynvor ! vorticity term USE bdy_par ! for lk_bdy USE bdytides ! open boundary condition data USE bdydyn2d ! open boundary conditions on barotropic variables USE sbctide ! tides USE updtide ! tide potential USE lib_mpp ! distributed memory computing library USE lbclnk ! ocean lateral boundary conditions (or mpp link) USE prtctl ! Print control USE in_out_manager ! I/O manager USE iom ! IOM library USE restart ! only for lrst_oce USE zdf_oce ! Bottom friction coefts USE wrk_nemo ! Memory Allocation USE timing ! Timing USE sbcapr ! surface boundary condition: atmospheric pressure USE dynadv, ONLY: ln_dynadv_vec #if defined key_agrif USE agrif_opa_interp ! agrif #endif #if defined key_asminc USE asminc ! Assimilation increment #endif IMPLICIT NONE PRIVATE PUBLIC dyn_spg_ts ! routine called in dynspg.F90 PUBLIC dyn_spg_ts_alloc ! " " " " PUBLIC dyn_spg_ts_init ! " " " " PUBLIC ts_rst ! " " " " INTEGER, SAVE :: icycle ! Number of barotropic sub-steps for each internal step nn_baro <= 2.5 nn_baro REAL(wp),SAVE :: rdtbt ! Barotropic time step REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:) :: & wgtbtp1, & ! Primary weights used for time filtering of barotropic variables wgtbtp2 ! Secondary weights used for time filtering of barotropic variables REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: zwz ! ff/h at F points REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: ftnw, ftne ! triad of coriolis parameter REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: ftsw, ftse ! (only used with een vorticity scheme) ! Arrays below are saved to allow testing of the "no time averaging" option ! If this option is not retained, these could be replaced by temporary arrays REAL(wp), ALLOCATABLE, SAVE, DIMENSION(:,:) :: sshbb_e, sshb_e, & ! Instantaneous barotropic arrays ubb_e, ub_e, & vbb_e, vb_e !! * Substitutions # include "domzgr_substitute.h90" # include "vectopt_loop_substitute.h90" !!---------------------------------------------------------------------- !! NEMO/OPA 3.5 , NEMO Consortium (2013) !! $Id: dynspg_ts.F90 5628 2015-07-22 20:26:35Z mathiot $ !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- CONTAINS INTEGER FUNCTION dyn_spg_ts_alloc() !!---------------------------------------------------------------------- !! *** routine dyn_spg_ts_alloc *** !!---------------------------------------------------------------------- INTEGER :: ierr(3) !!---------------------------------------------------------------------- ierr(:) = 0 ALLOCATE( sshb_e(jpi,jpj), sshbb_e(jpi,jpj), & & ub_e(jpi,jpj) , vb_e(jpi,jpj) , & & ubb_e(jpi,jpj) , vbb_e(jpi,jpj) , STAT= ierr(1) ) ALLOCATE( wgtbtp1(3*nn_baro), wgtbtp2(3*nn_baro), zwz(jpi,jpj), STAT= ierr(2) ) IF( ln_dynvor_een .or. ln_dynvor_een_old ) ALLOCATE( ftnw(jpi,jpj) , ftne(jpi,jpj) , & & ftsw(jpi,jpj) , ftse(jpi,jpj) , STAT=ierr(3) ) dyn_spg_ts_alloc = MAXVAL(ierr(:)) IF( lk_mpp ) CALL mpp_sum( dyn_spg_ts_alloc ) IF( dyn_spg_ts_alloc /= 0 ) CALL ctl_warn('dynspg_oce_alloc: failed to allocate arrays') ! END FUNCTION dyn_spg_ts_alloc SUBROUTINE dyn_spg_ts( kt ) !!---------------------------------------------------------------------- !! !! ** Purpose : !! -Compute the now trend due to the explicit time stepping !! of the quasi-linear barotropic system. !! !! ** Method : !! Barotropic variables are advanced from internal time steps !! "n" to "n+1" if ln_bt_fw=T !! or from !! "n-1" to "n+1" if ln_bt_fw=F !! thanks to a generalized forward-backward time stepping (see ref. below). !! !! ** Action : !! -Update the filtered free surface at step "n+1" : ssha !! -Update filtered barotropic velocities at step "n+1" : ua_b, va_b !! -Compute barotropic advective velocities at step "n" : un_adv, vn_adv !! These are used to advect tracers and are compliant with discrete !! continuity equation taken at the baroclinic time steps. This !! ensures tracers conservation. !! -Update 3d trend (ua, va) with barotropic component. !! !! References : Shchepetkin, A.F. and J.C. McWilliams, 2005: !! The regional oceanic modeling system (ROMS): !! a split-explicit, free-surface, !! topography-following-coordinate oceanic model. !! Ocean Modelling, 9, 347-404. !!--------------------------------------------------------------------- ! INTEGER, INTENT(in) :: kt ! ocean time-step index ! LOGICAL :: ll_fw_start ! if true, forward integration LOGICAL :: ll_init ! if true, special startup of 2d equations INTEGER :: ji, jj, jk, jn ! dummy loop indices INTEGER :: ikbu, ikbv, noffset ! local integers REAL(wp) :: zraur, z1_2dt_b, z2dt_bf ! local scalars REAL(wp) :: zx1, zy1, zx2, zy2 ! - - REAL(wp) :: z1_12, z1_8, z1_4, z1_2 ! - - REAL(wp) :: zu_spg, zv_spg ! - - REAL(wp) :: zhura, zhvra ! - - REAL(wp) :: za0, za1, za2, za3 ! - - ! REAL(wp), POINTER, DIMENSION(:,:) :: zun_e, zvn_e, zsshp2_e REAL(wp), POINTER, DIMENSION(:,:) :: zu_trd, zv_trd, zu_frc, zv_frc, zssh_frc REAL(wp), POINTER, DIMENSION(:,:) :: zu_sum, zv_sum, zwx, zwy, zhdiv REAL(wp), POINTER, DIMENSION(:,:) :: zhup2_e, zhvp2_e, zhust_e, zhvst_e REAL(wp), POINTER, DIMENSION(:,:) :: zsshu_a, zsshv_a REAL(wp), POINTER, DIMENSION(:,:) :: zhf !!---------------------------------------------------------------------- ! IF( nn_timing == 1 ) CALL timing_start('dyn_spg_ts') ! ! !* Allocate temporary arrays CALL wrk_alloc( jpi, jpj, zsshp2_e, zhdiv ) CALL wrk_alloc( jpi, jpj, zu_trd, zv_trd, zun_e, zvn_e ) CALL wrk_alloc( jpi, jpj, zwx, zwy, zu_sum, zv_sum, zssh_frc, zu_frc, zv_frc) CALL wrk_alloc( jpi, jpj, zhup2_e, zhvp2_e, zhust_e, zhvst_e) CALL wrk_alloc( jpi, jpj, zsshu_a, zsshv_a ) CALL wrk_alloc( jpi, jpj, zhf ) ! ! !* Local constant initialization z1_12 = 1._wp / 12._wp z1_8 = 0.125_wp z1_4 = 0.25_wp z1_2 = 0.5_wp zraur = 1._wp / rau0 ! IF( kt == nit000 .AND. neuler == 0 ) THEN ! reciprocal of baroclinic time step z2dt_bf = rdt ELSE z2dt_bf = 2.0_wp * rdt ENDIF z1_2dt_b = 1.0_wp / z2dt_bf ! ll_init = ln_bt_av ! if no time averaging, then no specific restart ll_fw_start = .FALSE. ! ! time offset in steps for bdy data update IF (.NOT.ln_bt_fw) THEN ; noffset=-nn_baro ; ELSE ; noffset = 0 ; ENDIF ! IF( kt == nit000 ) THEN !* initialisation ! IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) 'dyn_spg_ts : surface pressure gradient trend' IF(lwp) WRITE(numout,*) '~~~~~~~~~~ free surface with time splitting' IF(lwp) WRITE(numout,*) ! IF (neuler==0) ll_init=.TRUE. ! IF (ln_bt_fw.OR.(neuler==0)) THEN ll_fw_start=.TRUE. noffset = 0 ELSE ll_fw_start=.FALSE. ENDIF ! ! Set averaging weights and cycle length: CALL ts_wgt(ln_bt_av, ll_fw_start, icycle, wgtbtp1, wgtbtp2) ! ! ENDIF ! ! Set arrays to remove/compute coriolis trend. ! Do it once at kt=nit000 if volume is fixed, else at each long time step. ! Note that these arrays are also used during barotropic loop. These are however frozen ! although they should be updated in the variable volume case. Not a big approximation. ! To remove this approximation, copy lines below inside barotropic loop ! and update depths at T-F points (ht and zhf resp.) at each barotropic time step ! IF ( kt == nit000 .OR. lk_vvl ) THEN IF ( ln_dynvor_een_old ) THEN DO jj = 1, jpjm1 DO ji = 1, jpim1 zwz(ji,jj) = ( ht(ji ,jj+1) + ht(ji+1,jj+1) + & & ht(ji ,jj ) + ht(ji+1,jj ) ) / 4._wp IF( zwz(ji,jj) /= 0._wp ) zwz(ji,jj) = 1._wp / zwz(ji,jj) END DO END DO CALL lbc_lnk( zwz, 'F', 1._wp ) zwz(:,:) = ff(:,:) * zwz(:,:) ftne(1,:) = 0._wp ; ftnw(1,:) = 0._wp ; ftse(1,:) = 0._wp ; ftsw(1,:) = 0._wp DO jj = 2, jpj DO ji = fs_2, jpi ! vector opt. ftne(ji,jj) = zwz(ji-1,jj ) + zwz(ji ,jj ) + zwz(ji ,jj-1) ftnw(ji,jj) = zwz(ji-1,jj-1) + zwz(ji-1,jj ) + zwz(ji ,jj ) ftse(ji,jj) = zwz(ji ,jj ) + zwz(ji ,jj-1) + zwz(ji-1,jj-1) ftsw(ji,jj) = zwz(ji ,jj-1) + zwz(ji-1,jj-1) + zwz(ji-1,jj ) END DO END DO ELSE IF ( ln_dynvor_een ) THEN DO jj = 1, jpjm1 DO ji = 1, jpim1 zwz(ji,jj) = ( ht(ji ,jj+1) + ht(ji+1,jj+1) + & & ht(ji ,jj ) + ht(ji+1,jj ) ) & & / ( MAX( 1.0_wp, tmask(ji ,jj+1, 1) + tmask(ji+1,jj+1, 1) + & & tmask(ji ,jj , 1) + tmask(ji+1,jj , 1) ) ) IF( zwz(ji,jj) /= 0._wp ) zwz(ji,jj) = 1._wp / zwz(ji,jj) END DO END DO CALL lbc_lnk( zwz, 'F', 1._wp ) zwz(:,:) = ff(:,:) * zwz(:,:) ftne(1,:) = 0._wp ; ftnw(1,:) = 0._wp ; ftse(1,:) = 0._wp ; ftsw(1,:) = 0._wp DO jj = 2, jpj DO ji = fs_2, jpi ! vector opt. ftne(ji,jj) = zwz(ji-1,jj ) + zwz(ji ,jj ) + zwz(ji ,jj-1) ftnw(ji,jj) = zwz(ji-1,jj-1) + zwz(ji-1,jj ) + zwz(ji ,jj ) ftse(ji,jj) = zwz(ji ,jj ) + zwz(ji ,jj-1) + zwz(ji-1,jj-1) ftsw(ji,jj) = zwz(ji ,jj-1) + zwz(ji-1,jj-1) + zwz(ji-1,jj ) END DO END DO ELSE zwz(:,:) = 0._wp zhf(:,:) = 0. IF ( .not. ln_sco ) THEN ! JC: It not clear yet what should be the depth at f-points over land in z-coordinate case ! Set it to zero for the time being ! IF( rn_hmin < 0._wp ) THEN ; jk = - INT( rn_hmin ) ! from a nb of level ! ELSE ; jk = MINLOC( gdepw_0, mask = gdepw_0 > rn_hmin, dim = 1 ) ! from a depth ! ENDIF ! zhf(:,:) = gdepw_0(:,:,jk+1) ELSE zhf(:,:) = hbatf(:,:) END IF DO jj = 1, jpjm1 zhf(:,jj) = zhf(:,jj)*(1._wp- umask(:,jj,1) * umask(:,jj+1,1)) END DO DO jk = 1, jpkm1 DO jj = 1, jpjm1 zhf(:,jj) = zhf(:,jj) + fse3f_n(:,jj,jk) * umask(:,jj,jk) * umask(:,jj+1,jk) END DO END DO CALL lbc_lnk( zhf, 'F', 1._wp ) ! JC: TBC. hf should be greater than 0 DO jj = 1, jpj DO ji = 1, jpi IF( zhf(ji,jj) /= 0._wp ) zwz(ji,jj) = 1._wp / zhf(ji,jj) ! zhf is actually hf here but it saves an array END DO END DO zwz(:,:) = ff(:,:) * zwz(:,:) ENDIF ENDIF ! ! If forward start at previous time step, and centered integration, ! then update averaging weights: IF ((.NOT.ln_bt_fw).AND.((neuler==0).AND.(kt==nit000+1))) THEN ll_fw_start=.FALSE. CALL ts_wgt(ln_bt_av, ll_fw_start, icycle, wgtbtp1, wgtbtp2) ENDIF ! ----------------------------------------------------------------------------- ! Phase 1 : Coupling between general trend and barotropic estimates (1st step) ! ----------------------------------------------------------------------------- ! ! ! !* e3*d/dt(Ua) (Vertically integrated) ! ! -------------------------------------------------- zu_frc(:,:) = 0._wp zv_frc(:,:) = 0._wp ! DO jk = 1, jpkm1 zu_frc(:,:) = zu_frc(:,:) + fse3u_n(:,:,jk) * ua(:,:,jk) * umask(:,:,jk) zv_frc(:,:) = zv_frc(:,:) + fse3v_n(:,:,jk) * va(:,:,jk) * vmask(:,:,jk) END DO ! zu_frc(:,:) = zu_frc(:,:) * hur(:,:) zv_frc(:,:) = zv_frc(:,:) * hvr(:,:) ! ! ! !* baroclinic momentum trend (remove the vertical mean trend) DO jk = 1, jpkm1 ! ----------------------------------------------------------- DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. ua(ji,jj,jk) = ua(ji,jj,jk) - zu_frc(ji,jj) * umask(ji,jj,jk) va(ji,jj,jk) = va(ji,jj,jk) - zv_frc(ji,jj) * vmask(ji,jj,jk) END DO END DO END DO ! !* barotropic Coriolis trends (vorticity scheme dependent) ! ! -------------------------------------------------------- zwx(:,:) = un_b(:,:) * hu(:,:) * e2u(:,:) ! now fluxes zwy(:,:) = vn_b(:,:) * hv(:,:) * e1v(:,:) ! IF( ln_dynvor_ene .OR. ln_dynvor_mix ) THEN ! energy conserving or mixed scheme DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zy1 = ( zwy(ji,jj-1) + zwy(ji+1,jj-1) ) / e1u(ji,jj) zy2 = ( zwy(ji,jj ) + zwy(ji+1,jj ) ) / e1u(ji,jj) zx1 = ( zwx(ji-1,jj) + zwx(ji-1,jj+1) ) / e2v(ji,jj) zx2 = ( zwx(ji ,jj) + zwx(ji ,jj+1) ) / e2v(ji,jj) ! energy conserving formulation for planetary vorticity term zu_trd(ji,jj) = z1_4 * ( zwz(ji ,jj-1) * zy1 + zwz(ji,jj) * zy2 ) zv_trd(ji,jj) =-z1_4 * ( zwz(ji-1,jj ) * zx1 + zwz(ji,jj) * zx2 ) END DO END DO ! ELSEIF ( ln_dynvor_ens ) THEN ! enstrophy conserving scheme DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zy1 = z1_8 * ( zwy(ji ,jj-1) + zwy(ji+1,jj-1) & & + zwy(ji ,jj ) + zwy(ji+1,jj ) ) / e1u(ji,jj) zx1 = - z1_8 * ( zwx(ji-1,jj ) + zwx(ji-1,jj+1) & & + zwx(ji ,jj ) + zwx(ji ,jj+1) ) / e2v(ji,jj) zu_trd(ji,jj) = zy1 * ( zwz(ji ,jj-1) + zwz(ji,jj) ) zv_trd(ji,jj) = zx1 * ( zwz(ji-1,jj ) + zwz(ji,jj) ) END DO END DO ! ELSEIF ( ln_dynvor_een .or. ln_dynvor_een_old ) THEN ! enstrophy and energy conserving scheme DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zu_trd(ji,jj) = + z1_12 / e1u(ji,jj) * ( ftne(ji,jj ) * zwy(ji ,jj ) & & + ftnw(ji+1,jj) * zwy(ji+1,jj ) & & + ftse(ji,jj ) * zwy(ji ,jj-1) & & + ftsw(ji+1,jj) * zwy(ji+1,jj-1) ) zv_trd(ji,jj) = - z1_12 / e2v(ji,jj) * ( ftsw(ji,jj+1) * zwx(ji-1,jj+1) & & + ftse(ji,jj+1) * zwx(ji ,jj+1) & & + ftnw(ji,jj ) * zwx(ji-1,jj ) & & + ftne(ji,jj ) * zwx(ji ,jj ) ) END DO END DO ! ENDIF ! ! !* Right-Hand-Side of the barotropic momentum equation ! ! ---------------------------------------------------- IF( lk_vvl ) THEN ! Variable volume : remove surface pressure gradient DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zu_trd(ji,jj) = zu_trd(ji,jj) - grav * ( sshn(ji+1,jj ) - sshn(ji ,jj ) ) / e1u(ji,jj) zv_trd(ji,jj) = zv_trd(ji,jj) - grav * ( sshn(ji ,jj+1) - sshn(ji ,jj ) ) / e2v(ji,jj) END DO END DO ENDIF DO jj = 2, jpjm1 ! Remove coriolis term (and possibly spg) from barotropic trend DO ji = fs_2, fs_jpim1 zu_frc(ji,jj) = zu_frc(ji,jj) - zu_trd(ji,jj) * umask(ji,jj,1) zv_frc(ji,jj) = zv_frc(ji,jj) - zv_trd(ji,jj) * vmask(ji,jj,1) END DO END DO ! ! ! Add bottom stress contribution from baroclinic velocities: IF (ln_bt_fw) THEN DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. ikbu = mbku(ji,jj) ikbv = mbkv(ji,jj) zwx(ji,jj) = un(ji,jj,ikbu) - un_b(ji,jj) ! NOW bottom baroclinic velocities zwy(ji,jj) = vn(ji,jj,ikbv) - vn_b(ji,jj) END DO END DO ELSE DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. ikbu = mbku(ji,jj) ikbv = mbkv(ji,jj) zwx(ji,jj) = ub(ji,jj,ikbu) - ub_b(ji,jj) ! BEFORE bottom baroclinic velocities zwy(ji,jj) = vb(ji,jj,ikbv) - vb_b(ji,jj) END DO END DO ENDIF ! ! Note that the "unclipped" bottom friction parameter is used even with explicit drag zu_frc(:,:) = zu_frc(:,:) + hur(:,:) * bfrua(:,:) * zwx(:,:) zv_frc(:,:) = zv_frc(:,:) + hvr(:,:) * bfrva(:,:) * zwy(:,:) ! IF (ln_bt_fw) THEN ! Add wind forcing zu_frc(:,:) = zu_frc(:,:) + zraur * utau(:,:) * hur(:,:) zv_frc(:,:) = zv_frc(:,:) + zraur * vtau(:,:) * hvr(:,:) ELSE zu_frc(:,:) = zu_frc(:,:) + zraur * z1_2 * ( utau_b(:,:) + utau(:,:) ) * hur(:,:) zv_frc(:,:) = zv_frc(:,:) + zraur * z1_2 * ( vtau_b(:,:) + vtau(:,:) ) * hvr(:,:) ENDIF ! IF ( ln_apr_dyn ) THEN ! Add atm pressure forcing IF (ln_bt_fw) THEN DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zu_spg = grav * ( ssh_ib (ji+1,jj ) - ssh_ib (ji,jj) ) /e1u(ji,jj) zv_spg = grav * ( ssh_ib (ji ,jj+1) - ssh_ib (ji,jj) ) /e2v(ji,jj) zu_frc(ji,jj) = zu_frc(ji,jj) + zu_spg zv_frc(ji,jj) = zv_frc(ji,jj) + zv_spg END DO END DO ELSE DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zu_spg = grav * z1_2 * ( ssh_ib (ji+1,jj ) - ssh_ib (ji,jj) & & + ssh_ibb(ji+1,jj ) - ssh_ibb(ji,jj) ) /e1u(ji,jj) zv_spg = grav * z1_2 * ( ssh_ib (ji ,jj+1) - ssh_ib (ji,jj) & & + ssh_ibb(ji ,jj+1) - ssh_ibb(ji,jj) ) /e2v(ji,jj) zu_frc(ji,jj) = zu_frc(ji,jj) + zu_spg zv_frc(ji,jj) = zv_frc(ji,jj) + zv_spg END DO END DO ENDIF ENDIF ! !* Right-Hand-Side of the barotropic ssh equation ! ! ----------------------------------------------- ! ! Surface net water flux and rivers IF (ln_bt_fw) THEN zssh_frc(:,:) = zraur * ( emp(:,:) - rnf(:,:) + fwfisf(:,:) ) ELSE zssh_frc(:,:) = zraur * z1_2 * ( emp(:,:) + emp_b(:,:) - rnf(:,:) - rnf_b(:,:) & & + fwfisf(:,:) + fwfisf_b(:,:) ) ENDIF #if defined key_asminc ! ! Include the IAU weighted SSH increment IF( lk_asminc .AND. ln_sshinc .AND. ln_asmiau ) THEN zssh_frc(:,:) = zssh_frc(:,:) - ssh_iau(:,:) ENDIF #endif ! !* Fill boundary data arrays for AGRIF ! ! ------------------------------------ #if defined key_agrif IF( .NOT.Agrif_Root() ) CALL agrif_dta_ts( kt ) #endif ! ! ----------------------------------------------------------------------- ! Phase 2 : Integration of the barotropic equations ! ----------------------------------------------------------------------- ! ! ! ==================== ! ! ! Initialisations ! ! ! ==================== ! ! Initialize barotropic variables: IF( ll_init )THEN sshbb_e(:,:) = 0._wp ubb_e (:,:) = 0._wp vbb_e (:,:) = 0._wp sshb_e (:,:) = 0._wp ub_e (:,:) = 0._wp vb_e (:,:) = 0._wp ENDIF ! IF (ln_bt_fw) THEN ! FORWARD integration: start from NOW fields sshn_e(:,:) = sshn (:,:) zun_e (:,:) = un_b (:,:) zvn_e (:,:) = vn_b (:,:) ! hu_e (:,:) = hu (:,:) hv_e (:,:) = hv (:,:) hur_e (:,:) = hur (:,:) hvr_e (:,:) = hvr (:,:) ELSE ! CENTRED integration: start from BEFORE fields sshn_e(:,:) = sshb (:,:) zun_e (:,:) = ub_b (:,:) zvn_e (:,:) = vb_b (:,:) ! hu_e (:,:) = hu_b (:,:) hv_e (:,:) = hv_b (:,:) hur_e (:,:) = hur_b(:,:) hvr_e (:,:) = hvr_b(:,:) ENDIF ! ! ! ! Initialize sums: ua_b (:,:) = 0._wp ! After barotropic velocities (or transport if flux form) va_b (:,:) = 0._wp ssha (:,:) = 0._wp ! Sum for after averaged sea level zu_sum(:,:) = 0._wp ! Sum for now transport issued from ts loop zv_sum(:,:) = 0._wp ! ! ==================== ! DO jn = 1, icycle ! sub-time-step loop ! ! ! ==================== ! ! !* Update the forcing (BDY and tides) ! ! ------------------ ! Update only tidal forcing at open boundaries #if defined key_tide IF ( lk_bdy .AND. lk_tide ) CALL bdy_dta_tides( kt, kit=jn, time_offset=(noffset+1) ) IF ( ln_tide_pot .AND. lk_tide ) CALL upd_tide( kt, kit=jn, time_offset=noffset ) #endif ! ! Set extrapolation coefficients for predictor step: IF ((jn<3).AND.ll_init) THEN ! Forward za1 = 1._wp za2 = 0._wp za3 = 0._wp ELSE ! AB3-AM4 Coefficients: bet=0.281105 za1 = 1.781105_wp ! za1 = 3/2 + bet za2 = -1.06221_wp ! za2 = -(1/2 + 2*bet) za3 = 0.281105_wp ! za3 = bet ENDIF ! Extrapolate barotropic velocities at step jit+0.5: ua_e(:,:) = za1 * zun_e(:,:) + za2 * ub_e(:,:) + za3 * ubb_e(:,:) va_e(:,:) = za1 * zvn_e(:,:) + za2 * vb_e(:,:) + za3 * vbb_e(:,:) IF( lk_vvl ) THEN !* Update ocean depth (variable volume case only) ! ! ------------------ ! Extrapolate Sea Level at step jit+0.5: zsshp2_e(:,:) = za1 * sshn_e(:,:) + za2 * sshb_e(:,:) + za3 * sshbb_e(:,:) ! DO jj = 2, jpjm1 ! Sea Surface Height at u- & v-points DO ji = 2, fs_jpim1 ! Vector opt. zwx(ji,jj) = z1_2 * umask(ji,jj,1) * r1_e12u(ji,jj) & & * ( e12t(ji ,jj) * zsshp2_e(ji ,jj) & & + e12t(ji+1,jj) * zsshp2_e(ji+1,jj) ) zwy(ji,jj) = z1_2 * vmask(ji,jj,1) * r1_e12v(ji,jj) & & * ( e12t(ji,jj ) * zsshp2_e(ji,jj ) & & + e12t(ji,jj+1) * zsshp2_e(ji,jj+1) ) END DO END DO CALL lbc_lnk_multi( zwx, 'U', 1._wp, zwy, 'V', 1._wp ) ! zhup2_e (:,:) = hu_0(:,:) + zwx(:,:) ! Ocean depth at U- and V-points zhvp2_e (:,:) = hv_0(:,:) + zwy(:,:) ELSE zhup2_e (:,:) = hu(:,:) zhvp2_e (:,:) = hv(:,:) ENDIF ! !* after ssh ! ! ----------- ! One should enforce volume conservation at open boundaries here ! considering fluxes below: ! zwx(:,:) = e2u(:,:) * ua_e(:,:) * zhup2_e(:,:) ! fluxes at jn+0.5 zwy(:,:) = e1v(:,:) * va_e(:,:) * zhvp2_e(:,:) ! #if defined key_agrif ! Set fluxes during predictor step to ensure ! volume conservation IF( (.NOT.Agrif_Root()).AND.ln_bt_fw ) THEN IF((nbondi == -1).OR.(nbondi == 2)) THEN DO jj=1,jpj zwx(2,jj) = ubdy_w(jj) * e2u(2,jj) END DO ENDIF IF((nbondi == 1).OR.(nbondi == 2)) THEN DO jj=1,jpj zwx(nlci-2,jj) = ubdy_e(jj) * e2u(nlci-2,jj) END DO ENDIF IF((nbondj == -1).OR.(nbondj == 2)) THEN DO ji=1,jpi zwy(ji,2) = vbdy_s(ji) * e1v(ji,2) END DO ENDIF IF((nbondj == 1).OR.(nbondj == 2)) THEN DO ji=1,jpi zwy(ji,nlcj-2) = vbdy_n(ji) * e1v(ji,nlcj-2) END DO ENDIF ENDIF #endif ! ! Sum over sub-time-steps to compute advective velocities za2 = wgtbtp2(jn) zu_sum (:,:) = zu_sum (:,:) + za2 * zwx (:,:) / e2u (:,:) zv_sum (:,:) = zv_sum (:,:) + za2 * zwy (:,:) / e1v (:,:) ! ! Set next sea level: DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zhdiv(ji,jj) = ( zwx(ji,jj) - zwx(ji-1,jj) & & + zwy(ji,jj) - zwy(ji,jj-1) ) * r1_e12t(ji,jj) END DO END DO ssha_e(:,:) = ( sshn_e(:,:) - rdtbt * ( zssh_frc(:,:) + zhdiv(:,:) ) ) * tmask(:,:,1) CALL lbc_lnk( ssha_e, 'T', 1._wp ) #if defined key_bdy ! Duplicate sea level across open boundaries (this is only cosmetic if lk_vvl=.false.) IF (lk_bdy) CALL bdy_ssh( ssha_e ) #endif #if defined key_agrif IF( .NOT.Agrif_Root() ) CALL agrif_ssh_ts( jn ) #endif ! ! Sea Surface Height at u-,v-points (vvl case only) IF ( lk_vvl ) THEN DO jj = 2, jpjm1 DO ji = 2, jpim1 ! NO Vector Opt. zsshu_a(ji,jj) = z1_2 * umask(ji,jj,1) * r1_e12u(ji,jj) & & * ( e12t(ji ,jj ) * ssha_e(ji ,jj ) & & + e12t(ji+1,jj ) * ssha_e(ji+1,jj ) ) zsshv_a(ji,jj) = z1_2 * vmask(ji,jj,1) * r1_e12v(ji,jj) & & * ( e12t(ji ,jj ) * ssha_e(ji ,jj ) & & + e12t(ji ,jj+1) * ssha_e(ji ,jj+1) ) END DO END DO CALL lbc_lnk_multi( zsshu_a, 'U', 1._wp, zsshv_a, 'V', 1._wp ) ENDIF ! ! Half-step back interpolation of SSH for surface pressure computation: !---------------------------------------------------------------------- IF ((jn==1).AND.ll_init) THEN za0=1._wp ! Forward-backward za1=0._wp za2=0._wp za3=0._wp ELSEIF ((jn==2).AND.ll_init) THEN ! AB2-AM3 Coefficients; bet=0 ; gam=-1/6 ; eps=1/12 za0= 1.0833333333333_wp ! za0 = 1-gam-eps za1=-0.1666666666666_wp ! za1 = gam za2= 0.0833333333333_wp ! za2 = eps za3= 0._wp ELSE ! AB3-AM4 Coefficients; bet=0.281105 ; eps=0.013 ; gam=0.0880 za0=0.614_wp ! za0 = 1/2 + gam + 2*eps za1=0.285_wp ! za1 = 1/2 - 2*gam - 3*eps za2=0.088_wp ! za2 = gam za3=0.013_wp ! za3 = eps ENDIF zsshp2_e(:,:) = za0 * ssha_e(:,:) + za1 * sshn_e (:,:) & & + za2 * sshb_e(:,:) + za3 * sshbb_e(:,:) ! ! Compute associated depths at U and V points: IF ( lk_vvl.AND.(.NOT.ln_dynadv_vec) ) THEN ! DO jj = 2, jpjm1 DO ji = 2, jpim1 zx1 = z1_2 * umask(ji ,jj,1) * r1_e12u(ji ,jj) & & * ( e12t(ji ,jj ) * zsshp2_e(ji ,jj) & & + e12t(ji+1,jj ) * zsshp2_e(ji+1,jj ) ) zy1 = z1_2 * vmask(ji ,jj,1) * r1_e12v(ji ,jj ) & & * ( e12t(ji ,jj ) * zsshp2_e(ji ,jj ) & & + e12t(ji ,jj+1) * zsshp2_e(ji ,jj+1) ) zhust_e(ji,jj) = hu_0(ji,jj) + zx1 zhvst_e(ji,jj) = hv_0(ji,jj) + zy1 END DO END DO ENDIF ! ! Add Coriolis trend: ! zwz array below or triads normally depend on sea level with key_vvl and should be updated ! at each time step. We however keep them constant here for optimization. ! Recall that zwx and zwy arrays hold fluxes at this stage: ! zwx(:,:) = e2u(:,:) * ua_e(:,:) * zhup2_e(:,:) ! fluxes at jn+0.5 ! zwy(:,:) = e1v(:,:) * va_e(:,:) * zhvp2_e(:,:) ! IF( ln_dynvor_ene .OR. ln_dynvor_mix ) THEN !== energy conserving or mixed scheme ==! DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zy1 = ( zwy(ji ,jj-1) + zwy(ji+1,jj-1) ) / e1u(ji,jj) zy2 = ( zwy(ji ,jj ) + zwy(ji+1,jj ) ) / e1u(ji,jj) zx1 = ( zwx(ji-1,jj ) + zwx(ji-1,jj+1) ) / e2v(ji,jj) zx2 = ( zwx(ji ,jj ) + zwx(ji ,jj+1) ) / e2v(ji,jj) zu_trd(ji,jj) = z1_4 * ( zwz(ji ,jj-1) * zy1 + zwz(ji,jj) * zy2 ) zv_trd(ji,jj) =-z1_4 * ( zwz(ji-1,jj ) * zx1 + zwz(ji,jj) * zx2 ) END DO END DO ! ELSEIF ( ln_dynvor_ens ) THEN !== enstrophy conserving scheme ==! DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zy1 = z1_8 * ( zwy(ji ,jj-1) + zwy(ji+1,jj-1) & & + zwy(ji ,jj ) + zwy(ji+1,jj ) ) / e1u(ji,jj) zx1 = - z1_8 * ( zwx(ji-1,jj ) + zwx(ji-1,jj+1) & & + zwx(ji ,jj ) + zwx(ji ,jj+1) ) / e2v(ji,jj) zu_trd(ji,jj) = zy1 * ( zwz(ji ,jj-1) + zwz(ji,jj) ) zv_trd(ji,jj) = zx1 * ( zwz(ji-1,jj ) + zwz(ji,jj) ) END DO END DO ! ELSEIF ( ln_dynvor_een .or. ln_dynvor_een_old ) THEN !== energy and enstrophy conserving scheme ==! DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zu_trd(ji,jj) = + z1_12 / e1u(ji,jj) * ( ftne(ji,jj ) * zwy(ji ,jj ) & & + ftnw(ji+1,jj) * zwy(ji+1,jj ) & & + ftse(ji,jj ) * zwy(ji ,jj-1) & & + ftsw(ji+1,jj) * zwy(ji+1,jj-1) ) zv_trd(ji,jj) = - z1_12 / e2v(ji,jj) * ( ftsw(ji,jj+1) * zwx(ji-1,jj+1) & & + ftse(ji,jj+1) * zwx(ji ,jj+1) & & + ftnw(ji,jj ) * zwx(ji-1,jj ) & & + ftne(ji,jj ) * zwx(ji ,jj ) ) END DO END DO ! ENDIF ! ! Add tidal astronomical forcing if defined IF ( lk_tide.AND.ln_tide_pot ) THEN DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zu_spg = grav * ( pot_astro(ji+1,jj) - pot_astro(ji,jj) ) / e1u(ji,jj) zv_spg = grav * ( pot_astro(ji,jj+1) - pot_astro(ji,jj) ) / e2v(ji,jj) zu_trd(ji,jj) = zu_trd(ji,jj) + zu_spg zv_trd(ji,jj) = zv_trd(ji,jj) + zv_spg END DO END DO ENDIF ! ! Add bottom stresses: zu_trd(:,:) = zu_trd(:,:) + bfrua(:,:) * zun_e(:,:) * hur_e(:,:) zv_trd(:,:) = zv_trd(:,:) + bfrva(:,:) * zvn_e(:,:) * hvr_e(:,:) ! ! Surface pressure trend: DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. ! Add surface pressure gradient zu_spg = - grav * ( zsshp2_e(ji+1,jj) - zsshp2_e(ji,jj) ) / e1u(ji,jj) zv_spg = - grav * ( zsshp2_e(ji,jj+1) - zsshp2_e(ji,jj) ) / e2v(ji,jj) zwx(ji,jj) = zu_spg zwy(ji,jj) = zv_spg END DO END DO ! ! Set next velocities: IF( ln_dynadv_vec .OR. (.NOT. lk_vvl) ) THEN ! Vector form DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. ua_e(ji,jj) = ( zun_e(ji,jj) & & + rdtbt * ( zwx(ji,jj) & & + zu_trd(ji,jj) & & + zu_frc(ji,jj) ) & & ) * umask(ji,jj,1) va_e(ji,jj) = ( zvn_e(ji,jj) & & + rdtbt * ( zwy(ji,jj) & & + zv_trd(ji,jj) & & + zv_frc(ji,jj) ) & & ) * vmask(ji,jj,1) END DO END DO ELSE ! Flux form DO jj = 2, jpjm1 DO ji = fs_2, fs_jpim1 ! vector opt. zhura = umask(ji,jj,1)/(hu_0(ji,jj) + zsshu_a(ji,jj) + 1._wp - umask(ji,jj,1)) zhvra = vmask(ji,jj,1)/(hv_0(ji,jj) + zsshv_a(ji,jj) + 1._wp - vmask(ji,jj,1)) ua_e(ji,jj) = ( hu_e(ji,jj) * zun_e(ji,jj) & & + rdtbt * ( zhust_e(ji,jj) * zwx(ji,jj) & & + zhup2_e(ji,jj) * zu_trd(ji,jj) & & + hu(ji,jj) * zu_frc(ji,jj) ) & & ) * zhura va_e(ji,jj) = ( hv_e(ji,jj) * zvn_e(ji,jj) & & + rdtbt * ( zhvst_e(ji,jj) * zwy(ji,jj) & & + zhvp2_e(ji,jj) * zv_trd(ji,jj) & & + hv(ji,jj) * zv_frc(ji,jj) ) & & ) * zhvra END DO END DO ENDIF ! IF( lk_vvl ) THEN !* Update ocean depth (variable volume case only) ! ! ---------------------------------------------- hu_e (:,:) = hu_0(:,:) + zsshu_a(:,:) hv_e (:,:) = hv_0(:,:) + zsshv_a(:,:) hur_e(:,:) = umask(:,:,1) / ( hu_e(:,:) + 1._wp - umask(:,:,1) ) hvr_e(:,:) = vmask(:,:,1) / ( hv_e(:,:) + 1._wp - vmask(:,:,1) ) ! ENDIF ! !* domain lateral boundary ! ! ----------------------- ! CALL lbc_lnk_multi( ua_e, 'U', -1._wp, va_e , 'V', -1._wp ) #if defined key_bdy ! open boundaries IF( lk_bdy ) CALL bdy_dyn2d( jn, ua_e, va_e, zun_e, zvn_e, hur_e, hvr_e, ssha_e ) #endif #if defined key_agrif IF( .NOT.Agrif_Root() ) CALL agrif_dyn_ts( jn ) ! Agrif #endif ! !* Swap ! ! ---- ubb_e (:,:) = ub_e (:,:) ub_e (:,:) = zun_e (:,:) zun_e (:,:) = ua_e (:,:) ! vbb_e (:,:) = vb_e (:,:) vb_e (:,:) = zvn_e (:,:) zvn_e (:,:) = va_e (:,:) ! sshbb_e(:,:) = sshb_e(:,:) sshb_e (:,:) = sshn_e(:,:) sshn_e (:,:) = ssha_e(:,:) ! !* Sum over whole bt loop ! ! ---------------------- za1 = wgtbtp1(jn) IF (( ln_dynadv_vec ).OR. (.NOT. lk_vvl)) THEN ! Sum velocities ua_b (:,:) = ua_b (:,:) + za1 * ua_e (:,:) va_b (:,:) = va_b (:,:) + za1 * va_e (:,:) ELSE ! Sum transports ua_b (:,:) = ua_b (:,:) + za1 * ua_e (:,:) * hu_e (:,:) va_b (:,:) = va_b (:,:) + za1 * va_e (:,:) * hv_e (:,:) ENDIF ! ! Sum sea level ssha(:,:) = ssha(:,:) + za1 * ssha_e(:,:) ! ! ==================== ! END DO ! end loop ! ! ! ==================== ! ! ----------------------------------------------------------------------------- ! Phase 3. update the general trend with the barotropic trend ! ----------------------------------------------------------------------------- ! ! At this stage ssha holds a time averaged value ! ! Sea Surface Height at u-,v- and f-points IF( lk_vvl ) THEN ! (required only in key_vvl case) DO jj = 1, jpjm1 DO ji = 1, jpim1 ! NO Vector Opt. zsshu_a(ji,jj) = z1_2 * umask(ji,jj,1) * r1_e12u(ji,jj) & & * ( e12t(ji ,jj) * ssha(ji ,jj) & & + e12t(ji+1,jj) * ssha(ji+1,jj) ) zsshv_a(ji,jj) = z1_2 * vmask(ji,jj,1) * r1_e12v(ji,jj) & & * ( e12t(ji,jj ) * ssha(ji,jj ) & & + e12t(ji,jj+1) * ssha(ji,jj+1) ) END DO END DO CALL lbc_lnk_multi( zsshu_a, 'U', 1._wp, zsshv_a, 'V', 1._wp ) ! Boundary conditions ENDIF ! ! Set advection velocity correction: IF (((kt==nit000).AND.(neuler==0)).OR.(.NOT.ln_bt_fw)) THEN un_adv(:,:) = zu_sum(:,:)*hur(:,:) vn_adv(:,:) = zv_sum(:,:)*hvr(:,:) ELSE un_adv(:,:) = z1_2 * ( ub2_b(:,:) + zu_sum(:,:)) * hur(:,:) vn_adv(:,:) = z1_2 * ( vb2_b(:,:) + zv_sum(:,:)) * hvr(:,:) END IF IF (ln_bt_fw) THEN ! Save integrated transport for next computation ub2_b(:,:) = zu_sum(:,:) vb2_b(:,:) = zv_sum(:,:) ENDIF ! ! Update barotropic trend: IF (( ln_dynadv_vec ).OR. (.NOT. lk_vvl)) THEN DO jk=1,jpkm1 ua(:,:,jk) = ua(:,:,jk) + ( ua_b(:,:) - ub_b(:,:) ) * z1_2dt_b va(:,:,jk) = va(:,:,jk) + ( va_b(:,:) - vb_b(:,:) ) * z1_2dt_b END DO ELSE DO jk=1,jpkm1 ua(:,:,jk) = ua(:,:,jk) + hur(:,:) * ( ua_b(:,:) - ub_b(:,:) * hu_b(:,:) ) * z1_2dt_b va(:,:,jk) = va(:,:,jk) + hvr(:,:) * ( va_b(:,:) - vb_b(:,:) * hv_b(:,:) ) * z1_2dt_b END DO ! Save barotropic velocities not transport: ua_b (:,:) = ua_b(:,:) / ( hu_0(:,:) + zsshu_a(:,:) + 1._wp - umask(:,:,1) ) va_b (:,:) = va_b(:,:) / ( hv_0(:,:) + zsshv_a(:,:) + 1._wp - vmask(:,:,1) ) ENDIF ! DO jk = 1, jpkm1 ! Correct velocities: un(:,:,jk) = ( un(:,:,jk) + un_adv(:,:) - un_b(:,:) )*umask(:,:,jk) vn(:,:,jk) = ( vn(:,:,jk) + vn_adv(:,:) - vn_b(:,:) )*vmask(:,:,jk) ! END DO ! #if defined key_agrif ! Save time integrated fluxes during child grid integration ! (used to update coarse grid transports at next time step) ! IF ( (.NOT.Agrif_Root()).AND.(ln_bt_fw) ) THEN IF ( Agrif_NbStepint().EQ.0 ) THEN ub2_i_b(:,:) = 0.e0 vb2_i_b(:,:) = 0.e0 END IF ! za1 = 1._wp / REAL(Agrif_rhot(), wp) ub2_i_b(:,:) = ub2_i_b(:,:) + za1 * ub2_b(:,:) vb2_i_b(:,:) = vb2_i_b(:,:) + za1 * vb2_b(:,:) ENDIF ! ! #endif ! ! !* write time-spliting arrays in the restart IF(lrst_oce .AND.ln_bt_fw) CALL ts_rst( kt, 'WRITE' ) ! CALL wrk_dealloc( jpi, jpj, zsshp2_e, zhdiv ) CALL wrk_dealloc( jpi, jpj, zu_trd, zv_trd, zun_e, zvn_e ) CALL wrk_dealloc( jpi, jpj, zwx, zwy, zu_sum, zv_sum, zssh_frc, zu_frc, zv_frc ) CALL wrk_dealloc( jpi, jpj, zhup2_e, zhvp2_e, zhust_e, zhvst_e ) CALL wrk_dealloc( jpi, jpj, zsshu_a, zsshv_a ) CALL wrk_dealloc( jpi, jpj, zhf ) ! IF( nn_timing == 1 ) CALL timing_stop('dyn_spg_ts') ! END SUBROUTINE dyn_spg_ts SUBROUTINE ts_wgt( ll_av, ll_fw, jpit, zwgt1, zwgt2) !!--------------------------------------------------------------------- !! *** ROUTINE ts_wgt *** !! !! ** Purpose : Set time-splitting weights for temporal averaging (or not) !!---------------------------------------------------------------------- LOGICAL, INTENT(in) :: ll_av ! temporal averaging=.true. LOGICAL, INTENT(in) :: ll_fw ! forward time splitting =.true. INTEGER, INTENT(inout) :: jpit ! cycle length REAL(wp), DIMENSION(3*nn_baro), INTENT(inout) :: zwgt1, & ! Primary weights zwgt2 ! Secondary weights INTEGER :: jic, jn, ji ! temporary integers REAL(wp) :: za1, za2 !!---------------------------------------------------------------------- zwgt1(:) = 0._wp zwgt2(:) = 0._wp ! Set time index when averaged value is requested IF (ll_fw) THEN jic = nn_baro ELSE jic = 2 * nn_baro ENDIF ! Set primary weights: IF (ll_av) THEN ! Define simple boxcar window for primary weights ! (width = nn_baro, centered around jic) SELECT CASE ( nn_bt_flt ) CASE( 0 ) ! No averaging zwgt1(jic) = 1._wp jpit = jic CASE( 1 ) ! Boxcar, width = nn_baro DO jn = 1, 3*nn_baro za1 = ABS(float(jn-jic))/float(nn_baro) IF (za1 < 0.5_wp) THEN zwgt1(jn) = 1._wp jpit = jn ENDIF ENDDO CASE( 2 ) ! Boxcar, width = 2 * nn_baro DO jn = 1, 3*nn_baro za1 = ABS(float(jn-jic))/float(nn_baro) IF (za1 < 1._wp) THEN zwgt1(jn) = 1._wp jpit = jn ENDIF ENDDO CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_bt_flt' ) END SELECT ELSE ! No time averaging zwgt1(jic) = 1._wp jpit = jic ENDIF ! Set secondary weights DO jn = 1, jpit DO ji = jn, jpit zwgt2(jn) = zwgt2(jn) + zwgt1(ji) END DO END DO ! Normalize weigths: za1 = 1._wp / SUM(zwgt1(1:jpit)) za2 = 1._wp / SUM(zwgt2(1:jpit)) DO jn = 1, jpit zwgt1(jn) = zwgt1(jn) * za1 zwgt2(jn) = zwgt2(jn) * za2 END DO ! END SUBROUTINE ts_wgt SUBROUTINE ts_rst( kt, cdrw ) !!--------------------------------------------------------------------- !! *** ROUTINE ts_rst *** !! !! ** Purpose : Read or write time-splitting arrays in restart file !!---------------------------------------------------------------------- INTEGER , INTENT(in) :: kt ! ocean time-step CHARACTER(len=*), INTENT(in) :: cdrw ! "READ"/"WRITE" flag ! !!---------------------------------------------------------------------- ! IF( TRIM(cdrw) == 'READ' ) THEN CALL iom_get( numror, jpdom_autoglo, 'ub2_b' , ub2_b (:,:) ) CALL iom_get( numror, jpdom_autoglo, 'vb2_b' , vb2_b (:,:) ) IF( .NOT.ln_bt_av ) THEN CALL iom_get( numror, jpdom_autoglo, 'sshbb_e' , sshbb_e(:,:) ) CALL iom_get( numror, jpdom_autoglo, 'ubb_e' , ubb_e(:,:) ) CALL iom_get( numror, jpdom_autoglo, 'vbb_e' , vbb_e(:,:) ) CALL iom_get( numror, jpdom_autoglo, 'sshb_e' , sshb_e(:,:) ) CALL iom_get( numror, jpdom_autoglo, 'ub_e' , ub_e(:,:) ) CALL iom_get( numror, jpdom_autoglo, 'vb_e' , vb_e(:,:) ) ENDIF #if defined key_agrif ! Read time integrated fluxes IF ( .NOT.Agrif_Root() ) THEN CALL iom_get( numror, jpdom_autoglo, 'ub2_i_b' , ub2_i_b(:,:) ) CALL iom_get( numror, jpdom_autoglo, 'vb2_i_b' , vb2_i_b(:,:) ) ENDIF #endif ! ELSEIF( TRIM(cdrw) == 'WRITE' ) THEN CALL iom_rstput( kt, nitrst, numrow, 'ub2_b' , ub2_b (:,:) ) CALL iom_rstput( kt, nitrst, numrow, 'vb2_b' , vb2_b (:,:) ) ! IF (.NOT.ln_bt_av) THEN CALL iom_rstput( kt, nitrst, numrow, 'sshbb_e' , sshbb_e(:,:) ) CALL iom_rstput( kt, nitrst, numrow, 'ubb_e' , ubb_e(:,:) ) CALL iom_rstput( kt, nitrst, numrow, 'vbb_e' , vbb_e(:,:) ) CALL iom_rstput( kt, nitrst, numrow, 'sshb_e' , sshb_e(:,:) ) CALL iom_rstput( kt, nitrst, numrow, 'ub_e' , ub_e(:,:) ) CALL iom_rstput( kt, nitrst, numrow, 'vb_e' , vb_e(:,:) ) ENDIF #if defined key_agrif ! Save time integrated fluxes IF ( .NOT.Agrif_Root() ) THEN CALL iom_rstput( kt, nitrst, numrow, 'ub2_i_b' , ub2_i_b(:,:) ) CALL iom_rstput( kt, nitrst, numrow, 'vb2_i_b' , vb2_i_b(:,:) ) ENDIF #endif ENDIF ! END SUBROUTINE ts_rst SUBROUTINE dyn_spg_ts_init( kt ) !!--------------------------------------------------------------------- !! *** ROUTINE dyn_spg_ts_init *** !! !! ** Purpose : Set time splitting options !!---------------------------------------------------------------------- INTEGER , INTENT(in) :: kt ! ocean time-step ! INTEGER :: ji ,jj INTEGER :: ios ! Local integer output status for namelist read REAL(wp) :: zxr2, zyr2, zcmax REAL(wp), POINTER, DIMENSION(:,:) :: zcu !! NAMELIST/namsplit/ ln_bt_fw, ln_bt_av, ln_bt_nn_auto, & & nn_baro, rn_bt_cmax, nn_bt_flt !!---------------------------------------------------------------------- ! REWIND( numnam_ref ) ! Namelist namsplit in reference namelist : time splitting parameters READ ( numnam_ref, namsplit, IOSTAT = ios, ERR = 901) 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsplit in reference namelist', lwp ) REWIND( numnam_cfg ) ! Namelist namsplit in configuration namelist : time splitting parameters READ ( numnam_cfg, namsplit, IOSTAT = ios, ERR = 902 ) 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namsplit in configuration namelist', lwp ) IF(lwm) WRITE ( numond, namsplit ) ! ! ! Max courant number for ext. grav. waves ! CALL wrk_alloc( jpi, jpj, zcu ) ! IF (lk_vvl) THEN DO jj = 1, jpj DO ji =1, jpi zxr2 = 1./(e1t(ji,jj)*e1t(ji,jj)) zyr2 = 1./(e2t(ji,jj)*e2t(ji,jj)) zcu(ji,jj) = sqrt(grav*ht_0(ji,jj)*(zxr2 + zyr2) ) END DO END DO ELSE DO jj = 1, jpj DO ji =1, jpi zxr2 = 1./(e1t(ji,jj)*e1t(ji,jj)) zyr2 = 1./(e2t(ji,jj)*e2t(ji,jj)) zcu(ji,jj) = sqrt(grav*ht(ji,jj)*(zxr2 + zyr2) ) END DO END DO ENDIF zcmax = MAXVAL(zcu(:,:)) IF( lk_mpp ) CALL mpp_max( zcmax ) ! Estimate number of iterations to satisfy a max courant number= rn_bt_cmax IF (ln_bt_nn_auto) nn_baro = CEILING( rdt / rn_bt_cmax * zcmax) rdtbt = rdt / FLOAT(nn_baro) zcmax = zcmax * rdtbt ! Print results IF(lwp) WRITE(numout,*) IF(lwp) WRITE(numout,*) 'dyn_spg_ts : split-explicit free surface' IF(lwp) WRITE(numout,*) '~~~~~~~~~~' IF( ln_bt_nn_auto ) THEN IF(lwp) WRITE(numout,*) ' ln_ts_nn_auto=.true. Automatically set nn_baro ' IF(lwp) WRITE(numout,*) ' Max. courant number allowed: ', rn_bt_cmax ELSE IF(lwp) WRITE(numout,*) ' ln_ts_nn_auto=.false.: Use nn_baro in namelist ' ENDIF IF(ln_bt_av) THEN IF(lwp) WRITE(numout,*) ' ln_bt_av=.true. => Time averaging over nn_baro time steps is on ' ELSE IF(lwp) WRITE(numout,*) ' ln_bt_av=.false. => No time averaging of barotropic variables ' ENDIF ! ! IF(ln_bt_fw) THEN IF(lwp) WRITE(numout,*) ' ln_bt_fw=.true. => Forward integration of barotropic variables ' ELSE IF(lwp) WRITE(numout,*) ' ln_bt_fw =.false.=> Centred integration of barotropic variables ' ENDIF ! #if defined key_agrif ! Restrict the use of Agrif to the forward case only IF ((.NOT.ln_bt_fw ).AND.(.NOT.Agrif_Root())) CALL ctl_stop( 'AGRIF not implemented if ln_bt_fw=.FALSE.' ) #endif ! IF(lwp) WRITE(numout,*) ' Time filter choice, nn_bt_flt: ', nn_bt_flt SELECT CASE ( nn_bt_flt ) CASE( 0 ) ; IF(lwp) WRITE(numout,*) ' Dirac' CASE( 1 ) ; IF(lwp) WRITE(numout,*) ' Boxcar: width = nn_baro' CASE( 2 ) ; IF(lwp) WRITE(numout,*) ' Boxcar: width = 2*nn_baro' CASE DEFAULT ; CALL ctl_stop( 'unrecognised value for nn_bt_flt: should 0,1,2' ) END SELECT ! IF(lwp) WRITE(numout,*) ' ' IF(lwp) WRITE(numout,*) ' nn_baro = ', nn_baro IF(lwp) WRITE(numout,*) ' Barotropic time step [s] is :', rdtbt IF(lwp) WRITE(numout,*) ' Maximum Courant number is :', zcmax ! IF ((.NOT.ln_bt_av).AND.(.NOT.ln_bt_fw)) THEN CALL ctl_stop( 'dynspg_ts ERROR: No time averaging => only forward integration is possible' ) ENDIF IF ( zcmax>0.9_wp ) THEN CALL ctl_stop( 'dynspg_ts ERROR: Maximum Courant number is greater than 0.9: Inc. nn_baro !' ) ENDIF ! CALL wrk_dealloc( jpi, jpj, zcu ) ! END SUBROUTINE dyn_spg_ts_init #else !!--------------------------------------------------------------------------- !! Default case : Empty module No split explicit free surface !!--------------------------------------------------------------------------- CONTAINS INTEGER FUNCTION dyn_spg_ts_alloc() ! Dummy function dyn_spg_ts_alloc = 0 END FUNCTION dyn_spg_ts_alloc SUBROUTINE dyn_spg_ts( kt ) ! Empty routine INTEGER, INTENT(in) :: kt WRITE(*,*) 'dyn_spg_ts: You should not have seen this print! error?', kt END SUBROUTINE dyn_spg_ts SUBROUTINE ts_rst( kt, cdrw ) ! Empty routine INTEGER , INTENT(in) :: kt ! ocean time-step CHARACTER(len=*), INTENT(in) :: cdrw ! "READ"/"WRITE" flag WRITE(*,*) 'ts_rst : You should not have seen this print! error?', kt, cdrw END SUBROUTINE ts_rst SUBROUTINE dyn_spg_ts_init( kt ) ! Empty routine INTEGER , INTENT(in) :: kt ! ocean time-step WRITE(*,*) 'dyn_spg_ts_init : You should not have seen this print! error?', kt END SUBROUTINE dyn_spg_ts_init #endif !!====================================================================== END MODULE dynspg_ts