[358] | 1 | MODULE dynspg |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE dynspg *** |
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| 4 | !! Ocean dynamics: surface pressure gradient control |
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| 5 | !!====================================================================== |
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[1566] | 6 | !! History : 1.0 ! 2005-12 (C. Talandier, G. Madec, V. Garnier) Original code |
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| 7 | !! 3.2 ! 2009-07 (R. Benshila) Suppression of rigid-lid option |
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[503] | 8 | !!---------------------------------------------------------------------- |
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[358] | 9 | |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | !! dyn_spg : update the dynamics trend with the lateral diffusion |
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| 12 | !! dyn_spg_ctl : initialization, namelist read, and parameters control |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | USE oce ! ocean dynamics and tracers variables |
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| 15 | USE dom_oce ! ocean space and time domain variables |
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[367] | 16 | USE obc_oce ! ocean open boundary conditions |
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[2528] | 17 | USE sbc_oce ! surface boundary condition: ocean |
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| 18 | USE sbcapr ! surface boundary condition: atmospheric pressure |
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[367] | 19 | USE dynspg_oce ! surface pressure gradient variables |
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[358] | 20 | USE dynspg_exp ! surface pressure gradient (dyn_spg_exp routine) |
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| 21 | USE dynspg_ts ! surface pressure gradient (dyn_spg_ts routine) |
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| 22 | USE dynspg_flt ! surface pressure gradient (dyn_spg_flt routine) |
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[2528] | 23 | USE dynadv ! dynamics: vector invariant versus flux form |
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[358] | 24 | USE trdmod ! ocean dynamics trends |
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| 25 | USE trdmod_oce ! ocean variables trends |
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| 26 | USE prtctl ! Print control (prt_ctl routine) |
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| 27 | USE in_out_manager ! I/O manager |
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[2528] | 28 | USE phycst ! physical constants |
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[358] | 29 | |
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| 30 | IMPLICIT NONE |
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| 31 | PRIVATE |
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| 32 | |
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[2528] | 33 | PUBLIC dyn_spg ! routine called by step module |
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| 34 | PUBLIC dyn_spg_init ! routine called by opa module |
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[358] | 35 | |
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[503] | 36 | INTEGER :: nspg = 0 ! type of surface pressure gradient scheme defined from lk_dynspg_... |
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[358] | 37 | |
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| 38 | !! * Substitutions |
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| 39 | # include "domzgr_substitute.h90" |
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| 40 | # include "vectopt_loop_substitute.h90" |
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| 41 | !!---------------------------------------------------------------------- |
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[1566] | 42 | !! NEMO/OPA 3.2 , LODYC-IPSL (2009) |
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[1152] | 43 | !! $Id$ |
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[2528] | 44 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[358] | 45 | !!---------------------------------------------------------------------- |
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| 46 | |
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| 47 | CONTAINS |
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| 48 | |
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| 49 | SUBROUTINE dyn_spg( kt, kindic ) |
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| 50 | !!---------------------------------------------------------------------- |
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| 51 | !! *** ROUTINE dyn_spg *** |
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| 52 | !! |
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[1566] | 53 | !! ** Purpose : achieve the momentum time stepping by computing the |
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[2528] | 54 | !! last trend, the surface pressure gradient including the |
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| 55 | !! atmospheric pressure forcing (ln_apr_dyn=T), and performing |
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[1566] | 56 | !! the Leap-Frog integration. |
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| 57 | !!gm In the current version only the filtered solution provide |
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| 58 | !!gm the after velocity, in the 2 other (ua,va) are still the trends |
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| 59 | !! |
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| 60 | !! ** Method : Three schemes: |
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| 61 | !! - explicit computation : the spg is evaluated at now |
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| 62 | !! - filtered computation : the Roulet & madec (2000) technique is used |
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| 63 | !! - split-explicit computation: a time splitting technique is used |
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| 64 | !! |
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[2528] | 65 | !! ln_apr_dyn=T : the atmospheric pressure forcing is applied |
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| 66 | !! as the gradient of the inverse barometer ssh: |
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| 67 | !! apgu = - 1/rau0 di[apr] = 0.5*grav di[ssh_ib+ssh_ibb] |
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| 68 | !! apgv = - 1/rau0 dj[apr] = 0.5*grav dj[ssh_ib+ssh_ibb] |
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| 69 | !! Note that as all external forcing a time averaging over a two rdt |
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| 70 | !! period is used to prevent the divergence of odd and even time step. |
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| 71 | !! |
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[1566] | 72 | !! N.B. : When key_esopa is used all the scheme are tested, regardless |
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| 73 | !! of the physical meaning of the results. |
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[358] | 74 | !!---------------------------------------------------------------------- |
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[2590] | 75 | USE wrk_nemo, ONLY: wrk_use, wrk_release |
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| 76 | USE wrk_nemo, ONLY: ztrdu => wrk_3d_4, ztrdv => wrk_3d_5 |
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| 77 | !! |
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[1566] | 78 | INTEGER, INTENT(in ) :: kt ! ocean time-step index |
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| 79 | INTEGER, INTENT( out) :: kindic ! solver flag |
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[503] | 80 | !! |
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[2528] | 81 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 82 | REAL(wp) :: z2dt, zg_2 ! temporary scalar |
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[358] | 83 | !!---------------------------------------------------------------------- |
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| 84 | |
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[2590] | 85 | IF(.NOT. wrk_use(3, 4,5))THEN |
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| 86 | CALL ctl_stop('dyn_spg: requested workspace arrays unavailable.') |
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| 87 | RETURN |
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| 88 | END IF |
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[1566] | 89 | |
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| 90 | !!gm NOTA BENE : the dynspg_exp and dynspg_ts should be modified so that |
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| 91 | !!gm they return the after velocity, not the trends (as in trazdf_imp...) |
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| 92 | !!gm In this case, change/simplify dynnxt |
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| 93 | |
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| 94 | |
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| 95 | |
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[358] | 96 | IF( l_trddyn ) THEN ! temporary save of ta and sa trends |
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| 97 | ztrdu(:,:,:) = ua(:,:,:) |
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| 98 | ztrdv(:,:,:) = va(:,:,:) |
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| 99 | ENDIF |
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| 100 | |
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[2528] | 101 | IF( ln_apr_dyn ) THEN !== Atmospheric pressure gradient ==! |
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| 102 | zg_2 = grav * 0.5 |
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| 103 | DO jj = 2, jpjm1 ! gradient of Patm using inverse barometer ssh |
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| 104 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 105 | spgu(ji,jj) = zg_2 * ( ssh_ib (ji+1,jj) - ssh_ib (ji,jj) & |
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| 106 | & + ssh_ibb(ji+1,jj) - ssh_ibb(ji,jj) ) /e1u(ji,jj) |
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| 107 | spgv(ji,jj) = zg_2 * ( ssh_ib (ji,jj+1) - ssh_ib (ji,jj) & |
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| 108 | & + ssh_ibb(ji,jj+1) - ssh_ib (ji,jj) ) /e2v(ji,jj) |
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| 109 | END DO |
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| 110 | END DO |
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| 111 | DO jk = 1, jpkm1 ! Add the apg to the general trend |
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| 112 | DO jj = 2, jpjm1 |
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| 113 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 114 | ua(ji,jj,jk) = ua(ji,jj,jk) + spgu(ji,jj) |
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| 115 | va(ji,jj,jk) = va(ji,jj,jk) + spgv(ji,jj) |
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| 116 | END DO |
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| 117 | END DO |
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| 118 | END DO |
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| 119 | ENDIF |
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| 120 | |
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| 121 | |
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[358] | 122 | SELECT CASE ( nspg ) ! compute surf. pressure gradient trend and add it to the general trend |
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[789] | 123 | ! |
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[1566] | 124 | CASE ( 0 ) ; CALL dyn_spg_exp( kt ) ! explicit |
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| 125 | CASE ( 1 ) ; CALL dyn_spg_ts ( kt ) ! time-splitting |
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| 126 | CASE ( 2 ) ; CALL dyn_spg_flt( kt, kindic ) ! filtered |
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[789] | 127 | ! |
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[1566] | 128 | CASE ( -1 ) ! esopa: test all possibility with control print |
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| 129 | CALL dyn_spg_exp( kt ) |
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| 130 | CALL prt_ctl( tab3d_1=ua, clinfo1=' spg0 - Ua: ', mask1=umask, & |
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| 131 | & tab3d_2=va, clinfo2= ' Va: ', mask2=vmask, clinfo3='dyn' ) |
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| 132 | CALL dyn_spg_ts ( kt ) |
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| 133 | CALL prt_ctl( tab3d_1=ua, clinfo1=' spg1 - Ua: ', mask1=umask, & |
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| 134 | & tab3d_2=va, clinfo2= ' Va: ', mask2=vmask, clinfo3='dyn' ) |
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| 135 | CALL dyn_spg_flt( kt, kindic ) |
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| 136 | CALL prt_ctl( tab3d_1=ua, clinfo1=' spg2 - Ua: ', mask1=umask, & |
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| 137 | & tab3d_2=va, clinfo2= ' Va: ', mask2=vmask, clinfo3='dyn' ) |
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[358] | 138 | END SELECT |
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[503] | 139 | ! |
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[1566] | 140 | IF( l_trddyn ) THEN ! save the surface pressure gradient trends for further diagnostics |
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[358] | 141 | SELECT CASE ( nspg ) |
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[1528] | 142 | CASE ( 0, 1 ) |
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[358] | 143 | ztrdu(:,:,:) = ua(:,:,:) - ztrdu(:,:,:) |
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| 144 | ztrdv(:,:,:) = va(:,:,:) - ztrdv(:,:,:) |
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[1528] | 145 | CASE( 2 ) |
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[358] | 146 | z2dt = 2. * rdt |
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| 147 | IF( neuler == 0 .AND. kt == nit000 ) z2dt = rdt |
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| 148 | ztrdu(:,:,:) = ( ua(:,:,:) - ub(:,:,:) ) / z2dt - ztrdu(:,:,:) |
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| 149 | ztrdv(:,:,:) = ( va(:,:,:) - vb(:,:,:) ) / z2dt - ztrdv(:,:,:) |
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| 150 | END SELECT |
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[503] | 151 | CALL trd_mod( ztrdu, ztrdv, jpdyn_trd_spg, 'DYN', kt ) |
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[358] | 152 | ENDIF |
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| 153 | ! ! print mean trends (used for debugging) |
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| 154 | IF(ln_ctl) CALL prt_ctl( tab3d_1=ua, clinfo1=' spg - Ua: ', mask1=umask, & |
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| 155 | & tab3d_2=va, clinfo2= ' Va: ', mask2=vmask, clinfo3='dyn' ) |
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[503] | 156 | ! |
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[2590] | 157 | IF(.NOT. wrk_release(3, 4,5))THEN |
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| 158 | CALL ctl_stop('dyn_spg: failed to release workspace arrays.') |
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| 159 | END IF |
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| 160 | ! |
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[358] | 161 | END SUBROUTINE dyn_spg |
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| 162 | |
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| 163 | |
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[2528] | 164 | SUBROUTINE dyn_spg_init |
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[358] | 165 | !!--------------------------------------------------------------------- |
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[2528] | 166 | !! *** ROUTINE dyn_spg_init *** |
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[358] | 167 | !! |
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| 168 | !! ** Purpose : Control the consistency between cpp options for |
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[1566] | 169 | !! surface pressure gradient schemes |
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[358] | 170 | !!---------------------------------------------------------------------- |
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| 171 | INTEGER :: ioptio |
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| 172 | !!---------------------------------------------------------------------- |
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| 173 | |
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[1566] | 174 | IF(lwp) THEN ! Control print |
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[358] | 175 | WRITE(numout,*) |
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[2528] | 176 | WRITE(numout,*) 'dyn_spg_init : choice of the surface pressure gradient scheme' |
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[358] | 177 | WRITE(numout,*) '~~~~~~~~~~~' |
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| 178 | WRITE(numout,*) ' Explicit free surface lk_dynspg_exp = ', lk_dynspg_exp |
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| 179 | WRITE(numout,*) ' Free surface with time splitting lk_dynspg_ts = ', lk_dynspg_ts |
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| 180 | WRITE(numout,*) ' Filtered free surface cst volume lk_dynspg_flt = ', lk_dynspg_flt |
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| 181 | ENDIF |
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| 182 | |
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[1566] | 183 | ! ! Control of surface pressure gradient scheme options |
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[358] | 184 | ioptio = 0 |
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| 185 | IF(lk_dynspg_exp) ioptio = ioptio + 1 |
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| 186 | IF(lk_dynspg_ts ) ioptio = ioptio + 1 |
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| 187 | IF(lk_dynspg_flt) ioptio = ioptio + 1 |
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[1566] | 188 | ! |
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[474] | 189 | IF( ( ioptio > 1 .AND. .NOT. lk_esopa ) .OR. ioptio == 0 ) & |
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| 190 | & CALL ctl_stop( ' Choose only one surface pressure gradient scheme with a key cpp' ) |
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[1566] | 191 | ! |
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[358] | 192 | IF( lk_esopa ) nspg = -1 |
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| 193 | IF( lk_dynspg_exp) nspg = 0 |
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| 194 | IF( lk_dynspg_ts ) nspg = 1 |
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| 195 | IF( lk_dynspg_flt) nspg = 2 |
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[1566] | 196 | ! |
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[372] | 197 | IF( lk_esopa ) nspg = -1 |
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[1566] | 198 | ! |
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| 199 | IF(lwp) THEN |
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[358] | 200 | WRITE(numout,*) |
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[1528] | 201 | IF( nspg == -1 ) WRITE(numout,*) ' ESOPA test All scheme used' |
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[372] | 202 | IF( nspg == 0 ) WRITE(numout,*) ' explicit free surface' |
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| 203 | IF( nspg == 1 ) WRITE(numout,*) ' free surface with time splitting scheme' |
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| 204 | IF( nspg == 2 ) WRITE(numout,*) ' filtered free surface' |
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[358] | 205 | ENDIF |
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| 206 | |
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[1566] | 207 | ! ! Control of timestep choice |
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[1241] | 208 | IF( lk_dynspg_ts .OR. lk_dynspg_exp ) THEN |
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[2528] | 209 | IF( nn_cla == 1 ) CALL ctl_stop( 'Crossland advection not implemented for this free surface formulation' ) |
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[358] | 210 | ENDIF |
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| 211 | |
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[2528] | 212 | ! ! Control of momentum formulation |
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| 213 | IF( lk_dynspg_ts .AND. lk_vvl ) THEN |
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| 214 | IF( .NOT.ln_dynadv_vec ) CALL ctl_stop( 'Flux form not implemented for this free surface formulation' ) |
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| 215 | ENDIF |
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| 216 | |
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[1058] | 217 | #if defined key_obc |
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[1566] | 218 | ! ! Conservation of ocean volume (key_dynspg_flt) |
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| 219 | IF( lk_dynspg_flt ) ln_vol_cst = .true. |
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[367] | 220 | |
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[1566] | 221 | ! ! Application of Flather's algorithm at open boundaries |
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| 222 | IF( lk_dynspg_flt ) ln_obc_fla = .false. |
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| 223 | IF( lk_dynspg_exp ) ln_obc_fla = .true. |
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| 224 | IF( lk_dynspg_ts ) ln_obc_fla = .true. |
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[367] | 225 | #endif |
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[1566] | 226 | ! |
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[2528] | 227 | END SUBROUTINE dyn_spg_init |
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[358] | 228 | |
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| 229 | !!====================================================================== |
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| 230 | END MODULE dynspg |
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