[3] | 1 | MODULE dynzad |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE dynzad *** |
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| 4 | !! Ocean dynamics : vertical advection trend |
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| 5 | !!====================================================================== |
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[2715] | 6 | !! History : OPA ! 1991-01 (G. Madec) Original code |
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| 7 | !! 7.0 ! 1991-11 (G. Madec) |
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| 8 | !! 7.5 ! 1996-01 (G. Madec) statement function for e3 |
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| 9 | !! NEMO 0.5 ! 2002-07 (G. Madec) Free form, F90 |
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[503] | 10 | !!---------------------------------------------------------------------- |
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[3] | 11 | |
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| 12 | !!---------------------------------------------------------------------- |
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[503] | 13 | !! dyn_zad : vertical advection momentum trend |
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[3] | 14 | !!---------------------------------------------------------------------- |
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[503] | 15 | USE oce ! ocean dynamics and tracers |
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| 16 | USE dom_oce ! ocean space and time domain |
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[888] | 17 | USE sbc_oce ! surface boundary condition: ocean |
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| 18 | USE trdmod_oce ! ocean variables trends |
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| 19 | USE trdmod ! ocean dynamics trends |
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[719] | 20 | USE in_out_manager ! I/O manager |
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[2715] | 21 | USE lib_mpp ! MPP library |
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[503] | 22 | USE prtctl ! Print control |
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[3294] | 23 | USE wrk_nemo ! Memory Allocation |
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| 24 | USE timing ! Timing |
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[3] | 25 | |
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| 26 | IMPLICIT NONE |
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| 27 | PRIVATE |
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| 28 | |
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[503] | 29 | PUBLIC dyn_zad ! routine called by step.F90 |
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[3] | 30 | |
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| 31 | !! * Substitutions |
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| 32 | # include "domzgr_substitute.h90" |
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| 33 | # include "vectopt_loop_substitute.h90" |
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| 34 | !!---------------------------------------------------------------------- |
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[2528] | 35 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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[888] | 36 | !! $Id$ |
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[2715] | 37 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[3] | 38 | !!---------------------------------------------------------------------- |
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| 39 | CONTAINS |
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| 40 | |
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| 41 | SUBROUTINE dyn_zad ( kt ) |
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| 42 | !!---------------------------------------------------------------------- |
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| 43 | !! *** ROUTINE dynzad *** |
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| 44 | !! |
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| 45 | !! ** Purpose : Compute the now vertical momentum advection trend and |
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| 46 | !! add it to the general trend of momentum equation. |
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| 47 | !! |
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| 48 | !! ** Method : The now vertical advection of momentum is given by: |
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| 49 | !! w dz(u) = ua + 1/(e1u*e2u*e3u) mk+1[ mi(e1t*e2t*wn) dk(un) ] |
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| 50 | !! w dz(v) = va + 1/(e1v*e2v*e3v) mk+1[ mj(e1t*e2t*wn) dk(vn) ] |
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| 51 | !! Add this trend to the general trend (ua,va): |
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| 52 | !! (ua,va) = (ua,va) + w dz(u,v) |
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| 53 | !! |
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| 54 | !! ** Action : - Update (ua,va) with the vert. momentum adv. trends |
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[503] | 55 | !! - Save the trends in (ztrdu,ztrdv) ('key_trddyn') |
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[3294] | 56 | !!---------------------------------------------------------------------- |
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[503] | 57 | INTEGER, INTENT(in) :: kt ! ocean time-step inedx |
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[2715] | 58 | ! |
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[503] | 59 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 60 | REAL(wp) :: zua, zva ! temporary scalars |
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[3294] | 61 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zwuw , zwvw |
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| 62 | REAL(wp), POINTER, DIMENSION(:,: ) :: zww |
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| 63 | REAL(wp), POINTER, DIMENSION(:,:,:) :: ztrdu, ztrdv |
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[3] | 64 | !!---------------------------------------------------------------------- |
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[3294] | 65 | ! |
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| 66 | IF( nn_timing == 1 ) CALL timing_start('dyn_zad') |
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| 67 | ! |
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| 68 | CALL wrk_alloc( jpi,jpj, zww ) |
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| 69 | CALL wrk_alloc( jpi,jpj,jpk, zwuw , zwvw ) |
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| 70 | ! |
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[3] | 71 | IF( kt == nit000 ) THEN |
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| 72 | IF(lwp)WRITE(numout,*) |
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| 73 | IF(lwp)WRITE(numout,*) 'dyn_zad : arakawa advection scheme' |
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| 74 | ENDIF |
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[216] | 75 | |
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[503] | 76 | IF( l_trddyn ) THEN ! Save ua and va trends |
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[3294] | 77 | CALL wrk_alloc( jpi, jpj, jpk, ztrdu, ztrdv ) |
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[503] | 78 | ztrdu(:,:,:) = ua(:,:,:) |
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| 79 | ztrdv(:,:,:) = va(:,:,:) |
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[216] | 80 | ENDIF |
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[3] | 81 | |
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[503] | 82 | DO jk = 2, jpkm1 ! Vertical momentum advection at level w and u- and v- vertical |
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| 83 | DO jj = 2, jpj ! vertical fluxes |
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| 84 | DO ji = fs_2, jpi ! vector opt. |
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[3] | 85 | zww(ji,jj) = 0.25 * e1t(ji,jj) * e2t(ji,jj) * wn(ji,jj,jk) |
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| 86 | END DO |
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| 87 | END DO |
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[503] | 88 | DO jj = 2, jpjm1 ! vertical momentum advection at w-point |
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| 89 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[3] | 90 | zwuw(ji,jj,jk) = ( zww(ji+1,jj ) + zww(ji,jj) ) * ( un(ji,jj,jk-1)-un(ji,jj,jk) ) |
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| 91 | zwvw(ji,jj,jk) = ( zww(ji ,jj+1) + zww(ji,jj) ) * ( vn(ji,jj,jk-1)-vn(ji,jj,jk) ) |
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| 92 | END DO |
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| 93 | END DO |
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| 94 | END DO |
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[503] | 95 | DO jj = 2, jpjm1 ! Surface and bottom values set to zero |
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| 96 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[3] | 97 | zwuw(ji,jj, 1 ) = 0.e0 |
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| 98 | zwvw(ji,jj, 1 ) = 0.e0 |
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| 99 | zwuw(ji,jj,jpk) = 0.e0 |
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| 100 | zwvw(ji,jj,jpk) = 0.e0 |
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| 101 | END DO |
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| 102 | END DO |
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| 103 | |
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[503] | 104 | DO jk = 1, jpkm1 ! Vertical momentum advection at u- and v-points |
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[3] | 105 | DO jj = 2, jpjm1 |
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[503] | 106 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 107 | ! ! vertical momentum advective trends |
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[3] | 108 | zua = - ( zwuw(ji,jj,jk) + zwuw(ji,jj,jk+1) ) / ( e1u(ji,jj) * e2u(ji,jj) * fse3u(ji,jj,jk) ) |
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| 109 | zva = - ( zwvw(ji,jj,jk) + zwvw(ji,jj,jk+1) ) / ( e1v(ji,jj) * e2v(ji,jj) * fse3v(ji,jj,jk) ) |
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[503] | 110 | ! ! add the trends to the general momentum trends |
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[3] | 111 | ua(ji,jj,jk) = ua(ji,jj,jk) + zua |
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| 112 | va(ji,jj,jk) = va(ji,jj,jk) + zva |
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| 113 | END DO |
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| 114 | END DO |
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| 115 | END DO |
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| 116 | |
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[503] | 117 | IF( l_trddyn ) THEN ! save the vertical advection trends for diagnostic |
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| 118 | ztrdu(:,:,:) = ua(:,:,:) - ztrdu(:,:,:) |
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| 119 | ztrdv(:,:,:) = va(:,:,:) - ztrdv(:,:,:) |
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| 120 | CALL trd_mod(ztrdu, ztrdv, jpdyn_trd_zad, 'DYN', kt) |
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[3294] | 121 | CALL wrk_dealloc( jpi, jpj, jpk, ztrdu, ztrdv ) |
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[216] | 122 | ENDIF |
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[503] | 123 | ! ! Control print |
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| 124 | IF(ln_ctl) CALL prt_ctl( tab3d_1=ua, clinfo1=' zad - Ua: ', mask1=umask, & |
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| 125 | & tab3d_2=va, clinfo2= ' Va: ', mask2=vmask, clinfo3='dyn' ) |
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| 126 | ! |
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[3294] | 127 | CALL wrk_dealloc( jpi,jpj, zww ) |
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| 128 | CALL wrk_dealloc( jpi,jpj,jpk, zwuw , zwvw ) |
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[2715] | 129 | ! |
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[3294] | 130 | IF( nn_timing == 1 ) CALL timing_stop('dyn_zad') |
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| 131 | ! |
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[3] | 132 | END SUBROUTINE dyn_zad |
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| 133 | |
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[503] | 134 | !!====================================================================== |
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[3] | 135 | END MODULE dynzad |
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