| 1 | MODULE dynspg_flt |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE dynspg_flt *** |
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| 4 | !! Ocean dynamics: surface pressure gradient trend |
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| 5 | !!====================================================================== |
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| 6 | !! History 8.0 ! 98-05 (G. Roullet) free surface |
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| 7 | !! ! 98-10 (G. Madec, M. Imbard) release 8.2 |
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| 8 | !! 8.5 ! 02-08 (G. Madec) F90: Free form and module |
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| 9 | !! " " ! 02-11 (C. Talandier, A-M Treguier) Open boundaries |
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| 10 | !! 9.0 ! 04-08 (C. Talandier) New trends organization |
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| 11 | !! " " ! 05-11 (V. Garnier) Surface pressure gradient organization |
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| 12 | !! " " ! 06-07 (S. Masson) distributed restart using iom |
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| 13 | !! " " ! 05-01 (J.Chanut, A.Sellar) Calls to BDY routines. |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | #if defined key_dynspg_flt || defined key_esopa |
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| 16 | !!---------------------------------------------------------------------- |
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| 17 | !! 'key_dynspg_flt' filtered free surface |
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| 18 | !!---------------------------------------------------------------------- |
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| 19 | !!---------------------------------------------------------------------- |
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| 20 | !! dyn_spg_flt : update the momentum trend with the surface pressure |
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| 21 | !! gradient in the filtered free surface case with |
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| 22 | !! vector optimization |
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| 23 | !! flt_rst : read/write the time-splitting restart fields in the ocean restart file |
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| 24 | !!---------------------------------------------------------------------- |
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| 25 | USE oce ! ocean dynamics and tracers |
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| 26 | USE dom_oce ! ocean space and time domain |
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| 27 | USE zdf_oce ! ocean vertical physics |
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| 28 | USE sbc_oce ! surface boundary condition: ocean |
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| 29 | USE obc_oce ! Lateral open boundary condition |
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| 30 | USE sol_oce ! ocean elliptic solver |
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| 31 | USE phycst ! physical constants |
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| 32 | USE domvvl ! variable volume |
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| 33 | USE solver ! solver initialization |
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| 34 | USE solpcg ! preconditionned conjugate gradient solver |
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| 35 | USE solsor ! Successive Over-relaxation solver |
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| 36 | USE solfet ! FETI solver |
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| 37 | USE obcdyn ! ocean open boundary condition (obc_dyn routines) |
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| 38 | USE obcvol ! ocean open boundary condition (obc_vol routines) |
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| 39 | USE bdy_oce ! Unstructured open boundaries condition |
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| 40 | USE bdydyn ! Unstructured open boundaries condition (bdy_dyn routine) |
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| 41 | USE bdyvol ! Unstructured open boundaries condition (bdy_vol routine) |
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| 42 | USE cla_dynspg ! cross land advection |
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| 43 | USE in_out_manager ! I/O manager |
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| 44 | USE lib_mpp ! distributed memory computing library |
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| 45 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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| 46 | USE prtctl ! Print control |
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| 47 | USE solmat ! matrix construction for elliptic solvers |
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| 48 | USE agrif_opa_interp |
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| 49 | USE iom |
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| 50 | USE restart ! only for lrst_oce |
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| 51 | |
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| 52 | IMPLICIT NONE |
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| 53 | PRIVATE |
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| 54 | |
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| 55 | PUBLIC dyn_spg_flt ! routine called by step.F90 |
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| 56 | PUBLIC flt_rst ! routine called by istate.F90 |
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| 57 | |
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| 58 | !! * Substitutions |
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| 59 | # include "domzgr_substitute.h90" |
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| 60 | # include "vectopt_loop_substitute.h90" |
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| 61 | !!---------------------------------------------------------------------- |
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| 62 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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| 63 | !! $Id$ |
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| 64 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 65 | !!---------------------------------------------------------------------- |
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| 66 | |
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| 67 | CONTAINS |
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| 68 | |
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| 69 | SUBROUTINE dyn_spg_flt( kt, kindic ) |
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| 70 | !!---------------------------------------------------------------------- |
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| 71 | !! *** routine dyn_spg_flt *** |
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| 72 | !! |
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| 73 | !! ** Purpose : Compute the now trend due to the surface pressure |
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| 74 | !! gradient in case of filtered free surface formulation and add |
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| 75 | !! it to the general trend of momentum equation. |
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| 76 | !! |
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| 77 | !! ** Method : Filtered free surface formulation. The surface |
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| 78 | !! pressure gradient is given by: |
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| 79 | !! spgu = 1/rau0 d/dx(ps) = 1/e1u di( sshn + rnu btda ) |
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| 80 | !! spgv = 1/rau0 d/dy(ps) = 1/e2v dj( sshn + rnu btda ) |
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| 81 | !! where sshn is the free surface elevation and btda is the after |
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| 82 | !! of the free surface elevation |
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| 83 | !! -1- compute the after sea surface elevation from the kinematic |
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| 84 | !! surface boundary condition: |
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| 85 | !! zssha = sshb + 2 rdt ( wn - emp ) |
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| 86 | !! Time filter applied on now sea surface elevation to avoid |
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| 87 | !! the divergence of two consecutive time-steps and swap of free |
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| 88 | !! surface arrays to start the next time step: |
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| 89 | !! sshb = sshn + atfp * [ sshb + zssha - 2 sshn ] |
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| 90 | !! sshn = zssha |
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| 91 | !! -2- evaluate the surface presure trend (including the addi- |
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| 92 | !! tional force) in three steps: |
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| 93 | !! a- compute the right hand side of the elliptic equation: |
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| 94 | !! gcb = 1/(e1t e2t) [ di(e2u spgu) + dj(e1v spgv) ] |
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| 95 | !! where (spgu,spgv) are given by: |
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| 96 | !! spgu = vertical sum[ e3u (ub+ 2 rdt ua ) ] |
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| 97 | !! - grav 2 rdt hu /e1u di[sshn + emp] |
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| 98 | !! spgv = vertical sum[ e3v (vb+ 2 rdt va) ] |
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| 99 | !! - grav 2 rdt hv /e2v dj[sshn + emp] |
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| 100 | !! and define the first guess from previous computation : |
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| 101 | !! zbtd = btda |
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| 102 | !! btda = 2 zbtd - btdb |
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| 103 | !! btdb = zbtd |
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| 104 | !! b- compute the relative accuracy to be reached by the |
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| 105 | !! iterative solver |
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| 106 | !! c- apply the solver by a call to sol... routine |
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| 107 | !! -3- compute and add the free surface pressure gradient inclu- |
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| 108 | !! ding the additional force used to stabilize the equation. |
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| 109 | !! |
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| 110 | !! ** Action : - Update (ua,va) with the surf. pressure gradient trend |
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| 111 | !! |
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| 112 | !! References : Roullet and Madec 1999, JGR. |
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| 113 | !!--------------------------------------------------------------------- |
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| 114 | !! * Modules used |
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| 115 | USE oce , ONLY : zub => ta, & ! ta used as workspace |
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| 116 | zvb => sa ! sa " " |
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| 117 | |
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| 118 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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| 119 | INTEGER, INTENT( out ) :: kindic ! solver convergence flag (<0 if not converge) |
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| 120 | !! |
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| 121 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 122 | REAL(wp) :: z2dt, z2dtg, zraur, znugdt, & ! temporary scalars |
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| 123 | & znurau, zgcb, zbtd, & ! " " |
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| 124 | & ztdgu, ztdgv ! " " |
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| 125 | !! Variable volume |
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| 126 | REAL(wp), DIMENSION(jpi,jpj) :: & |
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| 127 | zsshub, zsshua, zsshvb, zsshva, zssha ! 2D workspace |
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| 128 | REAL(wp), DIMENSION(jpi,jpj,jpk) :: & ! 3D workspace |
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| 129 | zfse3ub, zfse3ua, zfse3vb, zfse3va ! 3D workspace |
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| 130 | !!---------------------------------------------------------------------- |
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| 131 | ! |
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| 132 | IF( kt == nit000 ) THEN |
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| 133 | IF(lwp) WRITE(numout,*) |
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| 134 | IF(lwp) WRITE(numout,*) 'dyn_spg_flt : surface pressure gradient trend' |
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| 135 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~ (free surface constant volume case)' |
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| 136 | |
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| 137 | ! set to zero free surface specific arrays |
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| 138 | spgu(:,:) = 0.e0 ! surface pressure gradient (i-direction) |
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| 139 | spgv(:,:) = 0.e0 ! surface pressure gradient (j-direction) |
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| 140 | CALL solver_init( nit000 ) ! Elliptic solver initialisation |
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| 141 | |
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| 142 | ! read filtered free surface arrays in restart file |
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| 143 | ! when using agrif, sshn, gcx have to be read in istate |
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| 144 | IF (.NOT. lk_agrif) CALL flt_rst( nit000, 'READ' ) ! read or initialize the following fields: |
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| 145 | ! ! gcx, gcxb, sshb, sshn |
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| 146 | ENDIF |
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| 147 | |
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| 148 | ! Local constant initialization |
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| 149 | z2dt = 2. * rdt ! time step: leap-frog |
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| 150 | IF( neuler == 0 .AND. kt == nit000 ) z2dt = rdt ! time step: Euler if restart from rest |
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| 151 | IF( neuler == 0 .AND. kt == nit000+1 ) CALL sol_mat(kt) |
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| 152 | z2dtg = grav * z2dt |
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| 153 | zraur = 1. / rauw |
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| 154 | znugdt = rnu * grav * z2dt |
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| 155 | znurau = znugdt * zraur |
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| 156 | |
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| 157 | !! Explicit physics with thickness weighted updates |
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| 158 | IF( lk_vvl ) THEN ! variable volume |
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| 159 | |
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| 160 | DO jj = 1, jpjm1 |
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| 161 | DO ji = 1,jpim1 |
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| 162 | |
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| 163 | ! Sea Surface Height at u-point before |
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| 164 | zsshub(ji,jj) = 0.5 * umask(ji,jj,1) / ( e1u(ji,jj) * e2u(ji,jj) ) & |
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| 165 | & * ( e1t(ji ,jj) * e2t(ji ,jj) * sshb(ji ,jj) & |
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| 166 | & + e1t(ji+1,jj) * e2t(ji+1,jj) * sshb(ji+1,jj) ) |
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| 167 | |
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| 168 | ! Sea Surface Height at v-point before |
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| 169 | zsshvb(ji,jj) = 0.5 * vmask(ji,jj,1) / ( e1v(ji,jj) * e2v(ji,jj) ) & |
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| 170 | & * ( e1t(ji,jj ) * e2t(ji,jj ) * sshb(ji,jj ) & |
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| 171 | & + e1t(ji,jj+1) * e2t(ji,jj+1) * sshb(ji,jj+1) ) |
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| 172 | |
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| 173 | ! Sea Surface Height at u-point after |
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| 174 | zsshua(ji,jj) = 0.5 * umask(ji,jj,1) / ( e1u(ji,jj) * e2u(ji,jj) ) & |
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| 175 | & * ( e1t(ji ,jj) * e2t(ji ,jj) * ssha(ji ,jj) & |
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| 176 | & + e1t(ji+1,jj) * e2t(ji+1,jj) * ssha(ji+1,jj) ) |
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| 177 | |
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| 178 | ! Sea Surface Height at v-point after |
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| 179 | zsshva(ji,jj) = 0.5 * vmask(ji,jj,1) / ( e1v(ji,jj) * e2v(ji,jj) ) & |
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| 180 | & * ( e1t(ji,jj ) * e2t(ji,jj ) * ssha(ji,jj ) & |
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| 181 | & + e1t(ji,jj+1) * e2t(ji,jj+1) * ssha(ji,jj+1) ) |
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| 182 | |
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| 183 | END DO |
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| 184 | END DO |
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| 185 | |
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| 186 | ! Boundaries conditions |
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| 187 | CALL lbc_lnk( zsshub, 'U', 1. ) ; CALL lbc_lnk( zsshvb, 'V', 1. ) |
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| 188 | CALL lbc_lnk( zsshua, 'U', 1. ) ; CALL lbc_lnk( zsshva, 'V', 1. ) |
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| 189 | |
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| 190 | ! Scale factors at before and after time step |
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| 191 | ! ------------------------------------------- |
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| 192 | CALL dom_vvl_sf( zsshub, 'U', zfse3ub ) ; CALL dom_vvl_sf( zsshua, 'U', zfse3ua ) |
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| 193 | CALL dom_vvl_sf( zsshvb, 'V', zfse3vb ) ; CALL dom_vvl_sf( zsshva, 'V', zfse3va ) |
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| 194 | |
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| 195 | |
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| 196 | ! Thickness weighting |
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| 197 | ! ------------------- |
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| 198 | DO jk = 1, jpkm1 |
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| 199 | DO jj = 1, jpj |
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| 200 | DO ji = 1, jpi |
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| 201 | ua(ji,jj,jk) = ua(ji,jj,jk) * fse3u(ji,jj,jk) |
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| 202 | va(ji,jj,jk) = va(ji,jj,jk) * fse3v(ji,jj,jk) |
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| 203 | |
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| 204 | zub(ji,jj,jk) = ub(ji,jj,jk) * zfse3ub(ji,jj,jk) |
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| 205 | zvb(ji,jj,jk) = vb(ji,jj,jk) * zfse3vb(ji,jj,jk) |
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| 206 | END DO |
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| 207 | END DO |
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| 208 | END DO |
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| 209 | |
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| 210 | ! Evaluate the masked next velocity (effect of the additional force not included) |
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| 211 | DO jk = 1, jpkm1 |
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| 212 | DO jj = 2, jpjm1 |
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| 213 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 214 | ua(ji,jj,jk) = ( zub(ji,jj,jk) + z2dt * ua(ji,jj,jk) ) /zfse3ua(ji,jj,jk) * umask(ji,jj,jk) |
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| 215 | va(ji,jj,jk) = ( zvb(ji,jj,jk) + z2dt * va(ji,jj,jk) ) /zfse3va(ji,jj,jk) * vmask(ji,jj,jk) |
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| 216 | END DO |
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| 217 | END DO |
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| 218 | END DO |
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| 219 | |
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| 220 | ELSE ! fixed volume |
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| 221 | |
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| 222 | ! Surface pressure gradient (now) |
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| 223 | DO jj = 2, jpjm1 |
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| 224 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 225 | spgu(ji,jj) = - grav * ( sshn(ji+1,jj) - sshn(ji,jj) ) / e1u(ji,jj) |
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| 226 | spgv(ji,jj) = - grav * ( sshn(ji,jj+1) - sshn(ji,jj) ) / e2v(ji,jj) |
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| 227 | END DO |
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| 228 | END DO |
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| 229 | |
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| 230 | ! Add the surface pressure trend to the general trend |
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| 231 | DO jk = 1, jpkm1 |
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| 232 | DO jj = 2, jpjm1 |
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| 233 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 234 | ua(ji,jj,jk) = ua(ji,jj,jk) + spgu(ji,jj) |
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| 235 | va(ji,jj,jk) = va(ji,jj,jk) + spgv(ji,jj) |
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| 236 | END DO |
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| 237 | END DO |
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| 238 | END DO |
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| 239 | |
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| 240 | ! Evaluate the masked next velocity (effect of the additional force not included) |
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| 241 | DO jk = 1, jpkm1 |
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| 242 | DO jj = 2, jpjm1 |
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| 243 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 244 | ua(ji,jj,jk) = ( ub(ji,jj,jk) + z2dt * ua(ji,jj,jk) ) * umask(ji,jj,jk) |
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| 245 | va(ji,jj,jk) = ( vb(ji,jj,jk) + z2dt * va(ji,jj,jk) ) * vmask(ji,jj,jk) |
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| 246 | END DO |
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| 247 | END DO |
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| 248 | END DO |
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| 249 | |
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| 250 | ENDIF |
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| 251 | |
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| 252 | #if defined key_obc |
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| 253 | CALL obc_dyn( kt ) ! Update velocities on each open boundary with the radiation algorithm |
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| 254 | CALL obc_vol( kt ) ! Correction of the barotropic componant velocity to control the volume of the system |
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| 255 | #endif |
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| 256 | #if defined key_bdy |
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| 257 | ! Update velocities on unstructured boundary using the Flow Relaxation Scheme |
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| 258 | CALL bdy_dyn_frs( kt ) |
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| 259 | |
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| 260 | IF (ln_bdy_vol) THEN |
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| 261 | ! Correction of the barotropic component velocity to control the volume of the system |
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| 262 | CALL bdy_vol( kt ) |
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| 263 | ENDIF |
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| 264 | #endif |
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| 265 | #if defined key_agrif |
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| 266 | CALL Agrif_dyn( kt ) ! Update velocities on each coarse/fine interfaces |
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| 267 | #endif |
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| 268 | #if defined key_orca_r2 |
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| 269 | IF( n_cla == 1 ) CALL dyn_spg_cla( kt ) ! Cross Land Advection (update (ua,va)) |
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| 270 | #endif |
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| 271 | |
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| 272 | ! compute the next vertically averaged velocity (effect of the additional force not included) |
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| 273 | ! --------------------------------------------- |
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| 274 | DO jj = 2, jpjm1 |
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| 275 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 276 | spgu(ji,jj) = 0.e0 |
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| 277 | spgv(ji,jj) = 0.e0 |
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| 278 | END DO |
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| 279 | END DO |
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| 280 | |
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| 281 | ! vertical sum |
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| 282 | !CDIR NOLOOPCHG |
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| 283 | IF( lk_vopt_loop ) THEN ! vector opt., forced unroll |
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| 284 | DO jk = 1, jpkm1 |
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| 285 | DO ji = 1, jpij |
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| 286 | spgu(ji,1) = spgu(ji,1) + fse3u(ji,1,jk) * ua(ji,1,jk) |
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| 287 | spgv(ji,1) = spgv(ji,1) + fse3v(ji,1,jk) * va(ji,1,jk) |
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| 288 | END DO |
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| 289 | END DO |
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| 290 | ELSE ! No vector opt. |
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| 291 | DO jk = 1, jpkm1 |
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| 292 | DO jj = 2, jpjm1 |
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| 293 | DO ji = 2, jpim1 |
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| 294 | spgu(ji,jj) = spgu(ji,jj) + fse3u(ji,jj,jk) * ua(ji,jj,jk) |
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| 295 | spgv(ji,jj) = spgv(ji,jj) + fse3v(ji,jj,jk) * va(ji,jj,jk) |
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| 296 | END DO |
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| 297 | END DO |
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| 298 | END DO |
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| 299 | ENDIF |
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| 300 | |
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| 301 | ! transport: multiplied by the horizontal scale factor |
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| 302 | DO jj = 2, jpjm1 |
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| 303 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 304 | spgu(ji,jj) = spgu(ji,jj) * e2u(ji,jj) |
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| 305 | spgv(ji,jj) = spgv(ji,jj) * e1v(ji,jj) |
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| 306 | END DO |
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| 307 | END DO |
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| 308 | |
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| 309 | ! Boundary conditions on (spgu,spgv) |
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| 310 | CALL lbc_lnk( spgu, 'U', -1. ) |
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| 311 | CALL lbc_lnk( spgv, 'V', -1. ) |
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| 312 | |
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| 313 | IF( lk_vvl ) CALL sol_mat( kt ) |
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| 314 | |
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| 315 | ! Right hand side of the elliptic equation and first guess |
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| 316 | ! ----------------------------------------------------------- |
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| 317 | DO jj = 2, jpjm1 |
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| 318 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 319 | ! Divergence of the after vertically averaged velocity |
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| 320 | zgcb = spgu(ji,jj) - spgu(ji-1,jj) & |
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| 321 | + spgv(ji,jj) - spgv(ji,jj-1) |
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| 322 | gcb(ji,jj) = gcdprc(ji,jj) * zgcb |
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| 323 | ! First guess of the after barotropic transport divergence |
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| 324 | zbtd = gcx(ji,jj) |
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| 325 | gcx (ji,jj) = 2. * zbtd - gcxb(ji,jj) |
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| 326 | gcxb(ji,jj) = zbtd |
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| 327 | END DO |
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| 328 | END DO |
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| 329 | ! applied the lateral boundary conditions |
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| 330 | IF( nsolv == 2 .AND. MAX( jpr2di, jpr2dj ) > 0 ) CALL lbc_lnk_e( gcb, c_solver_pt, 1. ) |
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| 331 | |
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| 332 | #if defined key_agrif |
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| 333 | IF( .NOT. AGRIF_ROOT() ) THEN |
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| 334 | ! add contribution of gradient of after barotropic transport divergence |
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| 335 | IF( nbondi == -1 .OR. nbondi == 2 ) gcb(3 ,:) = & |
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| 336 | & gcb(3 ,:) - znugdt * z2dt * laplacu(2 ,:) * gcdprc(3 ,:) * hu(2 ,:) * e2u(2 ,:) |
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| 337 | IF( nbondi == 1 .OR. nbondi == 2 ) gcb(nlci-2,:) = & |
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| 338 | & gcb(nlci-2,:) + znugdt * z2dt * laplacu(nlci-2,:) * gcdprc(nlci-2,:) * hu(nlci-2,:) * e2u(nlci-2,:) |
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| 339 | IF( nbondj == -1 .OR. nbondj == 2 ) gcb(: ,3) = & |
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| 340 | & gcb(:,3 ) - znugdt * z2dt * laplacv(:,2 ) * gcdprc(:,3 ) * hv(:,2 ) * e1v(:,2 ) |
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| 341 | IF( nbondj == 1 .OR. nbondj == 2 ) gcb(:,nlcj-2) = & |
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| 342 | & gcb(:,nlcj-2) + znugdt * z2dt * laplacv(:,nlcj-2) * gcdprc(:,nlcj-2) * hv(:,nlcj-2) * e1v(:,nlcj-2) |
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| 343 | ENDIF |
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| 344 | #endif |
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| 345 | |
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| 346 | |
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| 347 | ! Relative precision (computation on one processor) |
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| 348 | ! ------------------ |
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| 349 | rnorme =0. |
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| 350 | rnorme = SUM( gcb(1:jpi,1:jpj) * gcdmat(1:jpi,1:jpj) * gcb(1:jpi,1:jpj) * bmask(:,:) ) |
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| 351 | IF( lk_mpp ) CALL mpp_sum( rnorme ) ! sum over the global domain |
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| 352 | |
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| 353 | epsr = eps * eps * rnorme |
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| 354 | ncut = 0 |
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| 355 | ! if rnorme is 0, the solution is 0, the solver is not called |
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| 356 | IF( rnorme == 0.e0 ) THEN |
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| 357 | gcx(:,:) = 0.e0 |
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| 358 | res = 0.e0 |
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| 359 | niter = 0 |
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| 360 | ncut = 999 |
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| 361 | ENDIF |
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| 362 | |
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| 363 | ! Evaluate the next transport divergence |
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| 364 | ! -------------------------------------- |
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| 365 | ! Iterarive solver for the elliptic equation (except IF sol.=0) |
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| 366 | ! (output in gcx with boundary conditions applied) |
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| 367 | kindic = 0 |
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| 368 | IF( ncut == 0 ) THEN |
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| 369 | IF( nsolv == 1 ) THEN ! diagonal preconditioned conjuguate gradient |
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| 370 | CALL sol_pcg( kindic ) |
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| 371 | ELSEIF( nsolv == 2 ) THEN ! successive-over-relaxation |
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| 372 | CALL sol_sor( kindic ) |
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| 373 | ELSEIF( nsolv == 3 ) THEN ! FETI solver |
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| 374 | CALL sol_fet( kindic ) |
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| 375 | ELSE ! e r r o r in nsolv namelist parameter |
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| 376 | WRITE(ctmp1,*) ' ~~~~~~~~~~~ not = ', nsolv |
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| 377 | CALL ctl_stop( ' dyn_spg_flt : e r r o r, nsolv = 1, 2 or 3', ctmp1 ) |
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| 378 | ENDIF |
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| 379 | ENDIF |
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| 380 | |
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| 381 | ! Transport divergence gradient multiplied by z2dt |
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| 382 | ! --------------------------------------------==== |
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| 383 | DO jj = 2, jpjm1 |
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| 384 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 385 | ! trend of Transport divergence gradient |
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| 386 | ztdgu = znugdt * (gcx(ji+1,jj ) - gcx(ji,jj) ) / e1u(ji,jj) |
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| 387 | ztdgv = znugdt * (gcx(ji ,jj+1) - gcx(ji,jj) ) / e2v(ji,jj) |
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| 388 | ! multiplied by z2dt |
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| 389 | #if defined key_obc |
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| 390 | ! caution : grad D = 0 along open boundaries |
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| 391 | spgu(ji,jj) = z2dt * ztdgu * obcumask(ji,jj) |
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| 392 | spgv(ji,jj) = z2dt * ztdgv * obcvmask(ji,jj) |
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| 393 | #elif defined key_bdy |
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| 394 | ! caution : grad D = 0 along open boundaries |
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| 395 | ! Remark: The filtering force could be reduced here in the FRS zone |
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| 396 | ! by multiplying spgu/spgv by (1-alpha) ?? |
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| 397 | spgu(ji,jj) = z2dt * ztdgu * bdyumask(ji,jj) |
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| 398 | spgv(ji,jj) = z2dt * ztdgv * bdyvmask(ji,jj) |
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| 399 | #else |
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| 400 | spgu(ji,jj) = z2dt * ztdgu |
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| 401 | spgv(ji,jj) = z2dt * ztdgv |
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| 402 | #endif |
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| 403 | END DO |
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| 404 | END DO |
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| 405 | |
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| 406 | #if defined key_agrif |
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| 407 | IF( .NOT. Agrif_Root() ) THEN |
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| 408 | ! caution : grad D (fine) = grad D (coarse) at coarse/fine interface |
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| 409 | IF( nbondi == -1 .OR. nbondi == 2 ) spgu(2 ,:) = znugdt * z2dt * laplacu(2 ,:) * umask(2 ,:,1) |
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| 410 | IF( nbondi == 1 .OR. nbondi == 2 ) spgu(nlci-2,:) = znugdt * z2dt * laplacu(nlci-2,:) * umask(nlci-2,:,1) |
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| 411 | IF( nbondj == -1 .OR. nbondj == 2 ) spgv(:,2 ) = znugdt * z2dt * laplacv(:,2 ) * vmask(: ,2,1) |
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| 412 | IF( nbondj == 1 .OR. nbondj == 2 ) spgv(:,nlcj-2) = znugdt * z2dt * laplacv(:,nlcj-2) * vmask(:,nlcj-2,1) |
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| 413 | ENDIF |
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| 414 | #endif |
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| 415 | ! 7. Add the trends multiplied by z2dt to the after velocity |
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| 416 | ! ----------------------------------------------------------- |
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| 417 | ! ( c a u t i o n : (ua,va) here are the after velocity not the |
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| 418 | ! trend, the leap-frog time stepping will not |
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| 419 | ! be done in dynnxt.F90 routine) |
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| 420 | DO jk = 1, jpkm1 |
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| 421 | DO jj = 2, jpjm1 |
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| 422 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 423 | ua(ji,jj,jk) = (ua(ji,jj,jk) + spgu(ji,jj)) * umask(ji,jj,jk) |
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| 424 | va(ji,jj,jk) = (va(ji,jj,jk) + spgv(ji,jj)) * vmask(ji,jj,jk) |
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| 425 | END DO |
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| 426 | END DO |
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| 427 | END DO |
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| 428 | |
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| 429 | ! Sea surface elevation time stepping |
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| 430 | ! ----------------------------------- |
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| 431 | IF( lk_vvl ) THEN ! after free surface elevation |
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| 432 | zssha(:,:) = ssha(:,:) |
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| 433 | ELSE |
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| 434 | zssha(:,:) = sshb(:,:) + z2dt * ( wn(:,:,1) - emp(:,:) * zraur ) * tmask(:,:,1) |
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| 435 | ENDIF |
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| 436 | #if defined key_obc |
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| 437 | # if defined key_agrif |
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| 438 | IF ( Agrif_Root() ) THEN |
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| 439 | # endif |
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| 440 | zssha(:,:)=zssha(:,:)*obctmsk(:,:) |
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| 441 | CALL lbc_lnk(zssha,'T',1.) ! absolutly compulsory !! (jmm) |
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| 442 | # if defined key_agrif |
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| 443 | ENDIF |
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| 444 | # endif |
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| 445 | #endif |
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| 446 | |
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| 447 | IF( neuler == 0 .AND. kt == nit000 ) THEN ! Euler (forward) time stepping, no time filter |
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| 448 | ! swap of arrays |
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| 449 | sshb(:,:) = sshn (:,:) |
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| 450 | sshn(:,:) = zssha(:,:) |
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| 451 | ELSE ! Leap-frog time stepping and time filter |
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| 452 | ! time filter and array swap |
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| 453 | sshb(:,:) = atfp * ( sshb(:,:) + zssha(:,:) ) + atfp1 * sshn(:,:) |
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| 454 | sshn(:,:) = zssha(:,:) |
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| 455 | ENDIF |
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| 456 | |
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| 457 | ! write filtered free surface arrays in restart file |
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| 458 | ! -------------------------------------------------- |
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| 459 | IF( lrst_oce ) CALL flt_rst( kt, 'WRITE' ) |
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| 460 | |
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| 461 | ! print sum trends (used for debugging) |
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| 462 | IF(ln_ctl) CALL prt_ctl( tab2d_1=sshn, clinfo1=' spg - ssh: ', mask1=tmask ) |
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| 463 | ! |
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| 464 | END SUBROUTINE dyn_spg_flt |
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| 465 | |
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| 466 | |
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| 467 | SUBROUTINE flt_rst( kt, cdrw ) |
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| 468 | !!--------------------------------------------------------------------- |
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| 469 | !! *** ROUTINE ts_rst *** |
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| 470 | !! |
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| 471 | !! ** Purpose : Read or write filtered free surface arrays in restart file |
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| 472 | !!---------------------------------------------------------------------- |
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| 473 | INTEGER , INTENT(in) :: kt ! ocean time-step |
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| 474 | CHARACTER(len=*), INTENT(in) :: cdrw ! "READ"/"WRITE" flag |
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| 475 | !!---------------------------------------------------------------------- |
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| 476 | |
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| 477 | IF( TRIM(cdrw) == 'READ' ) THEN |
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| 478 | IF( iom_varid( numror, 'gcx', ldstop = .FALSE. ) > 0 ) THEN |
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| 479 | ! Caution : extra-hallow |
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| 480 | ! gcx and gcxb are defined as: DIMENSION(1-jpr2di:jpi+jpr2di,1-jpr2dj:jpj+jpr2dj) |
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| 481 | CALL iom_get( numror, jpdom_autoglo, 'gcx' , gcx (1:jpi,1:jpj) ) |
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| 482 | CALL iom_get( numror, jpdom_autoglo, 'gcxb', gcxb(1:jpi,1:jpj) ) |
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| 483 | CALL iom_get( numror, jpdom_autoglo, 'sshb', sshb(:,:) ) |
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| 484 | CALL iom_get( numror, jpdom_autoglo, 'sshn', sshn(:,:) ) |
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| 485 | IF( neuler == 0 ) THEN |
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| 486 | sshb(:,:) = sshn(:,:) |
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| 487 | gcxb(:,:) = gcx (:,:) |
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| 488 | ENDIF |
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| 489 | ELSE |
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| 490 | gcx (:,:) = 0.e0 |
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| 491 | gcxb(:,:) = 0.e0 |
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| 492 | IF( nn_rstssh == 1 ) THEN |
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| 493 | sshb(:,:) = 0.e0 |
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| 494 | sshn(:,:) = 0.e0 |
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| 495 | ENDIF |
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| 496 | ENDIF |
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| 497 | ELSEIF( TRIM(cdrw) == 'WRITE' ) THEN |
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| 498 | ! Caution : extra-hallow |
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| 499 | ! gcx and gcxb are defined as: DIMENSION(1-jpr2di:jpi+jpr2di,1-jpr2dj:jpj+jpr2dj) |
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| 500 | CALL iom_rstput( kt, nitrst, numrow, 'gcx' , gcx( 1:jpi,1:jpj) ) |
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| 501 | CALL iom_rstput( kt, nitrst, numrow, 'gcxb', gcxb(1:jpi,1:jpj) ) |
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| 502 | CALL iom_rstput( kt, nitrst, numrow, 'sshb', sshb(:,:) ) |
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| 503 | CALL iom_rstput( kt, nitrst, numrow, 'sshn', sshn(:,:) ) |
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| 504 | ENDIF |
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| 505 | ! |
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| 506 | END SUBROUTINE flt_rst |
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| 507 | |
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| 508 | #else |
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| 509 | !!---------------------------------------------------------------------- |
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| 510 | !! Default case : Empty module No standart free surface cst volume |
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| 511 | !!---------------------------------------------------------------------- |
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| 512 | CONTAINS |
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| 513 | SUBROUTINE dyn_spg_flt( kt, kindic ) ! Empty routine |
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| 514 | WRITE(*,*) 'dyn_spg_flt: You should not have seen this print! error?', kt, kindic |
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| 515 | END SUBROUTINE dyn_spg_flt |
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| 516 | SUBROUTINE flt_rst ( kt, cdrw ) ! Empty routine |
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| 517 | INTEGER , INTENT(in) :: kt ! ocean time-step |
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| 518 | CHARACTER(len=*), INTENT(in) :: cdrw ! "READ"/"WRITE" flag |
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| 519 | WRITE(*,*) 'flt_rst: You should not have seen this print! error?', kt, cdrw |
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| 520 | END SUBROUTINE flt_rst |
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| 521 | #endif |
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| 522 | |
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| 523 | !!====================================================================== |
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| 524 | END MODULE dynspg_flt |
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