[3] | 1 | MODULE wzvmod |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE wzvmod *** |
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| 4 | !! Ocean diagnostic variable : vertical velocity |
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| 5 | !!============================================================================== |
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[592] | 6 | !! History : 5.0 ! 90-10 (C. Levy, G. Madec) Original code |
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| 7 | !! 7.0 ! 96-01 (G. Madec) Statement function for e3 |
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| 8 | !! 8.5 ! 02-07 (G. Madec) Free form, F90 |
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[911] | 9 | !! " ! 07-07 (D. Storkey) Zero zhdiv at open boundary (BDY) |
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[3] | 10 | !!---------------------------------------------------------------------- |
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| 11 | !! wzv : Compute the vertical velocity |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | !! * Modules used |
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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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[888] | 16 | USE sbc_oce ! surface boundary condition: ocean |
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| 17 | USE domvvl ! Variable volume |
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[3] | 18 | USE in_out_manager ! I/O manager |
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[258] | 19 | USE prtctl ! Print control |
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[592] | 20 | USE phycst |
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[911] | 21 | USE bdy_oce ! unstructured open boundaries |
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[592] | 22 | USE lbclnk ! ocean lateral boundary condition (or mpp link) |
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| 23 | |
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[3] | 24 | IMPLICIT NONE |
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| 25 | PRIVATE |
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| 26 | |
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| 27 | !! * Routine accessibility |
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[592] | 28 | PUBLIC wzv ! routine called by step.F90 and inidtr.F90 |
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[3] | 29 | |
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| 30 | !! * Substitutions |
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| 31 | # include "domzgr_substitute.h90" |
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| 32 | !!---------------------------------------------------------------------- |
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[592] | 33 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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[888] | 34 | !! $Id$ |
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[592] | 35 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 36 | !!---------------------------------------------------------------------- |
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[3] | 37 | |
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| 38 | CONTAINS |
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| 39 | |
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| 40 | SUBROUTINE wzv( kt ) |
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| 41 | !!---------------------------------------------------------------------- |
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| 42 | !! *** ROUTINE wzv *** |
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| 43 | !! |
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| 44 | !! ** Purpose : Compute the now vertical velocity after the array swap |
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| 45 | !! |
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| 46 | !! ** Method : Using the incompressibility hypothesis, the vertical |
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| 47 | !! velocity is computed by integrating the horizontal divergence |
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| 48 | !! from the bottom to the surface. |
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| 49 | !! The boundary conditions are w=0 at the bottom (no flux) and, |
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| 50 | !! in regid-lid case, w=0 at the sea surface. |
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| 51 | !! |
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| 52 | !! ** action : wn array : the now vertical velocity |
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| 53 | !!---------------------------------------------------------------------- |
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| 54 | !! * Arguments |
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| 55 | INTEGER, INTENT( in ) :: kt ! ocean time-step index |
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| 56 | |
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| 57 | !! * Local declarations |
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[592] | 58 | INTEGER :: jk ! dummy loop indices |
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| 59 | !! Variable volume |
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| 60 | INTEGER :: ji, jj ! dummy loop indices |
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| 61 | REAL(wp) :: z2dt, zraur ! temporary scalar |
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| 62 | REAL(wp), DIMENSION (jpi,jpj) :: zssha, zun, zvn, zhdiv |
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[1125] | 63 | #if defined key_bdy |
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[1040] | 64 | INTEGER :: jgrd, jb ! temporary scalars |
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| 65 | #endif |
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[3] | 66 | !!---------------------------------------------------------------------- |
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| 67 | |
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| 68 | IF( kt == nit000 ) THEN |
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| 69 | IF(lwp) WRITE(numout,*) |
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| 70 | IF(lwp) WRITE(numout,*) 'wzv : vertical velocity from continuity eq.' |
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| 71 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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| 72 | |
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| 73 | ! bottom boundary condition: w=0 (set once for all) |
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| 74 | wn(:,:,jpk) = 0.e0 |
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| 75 | ENDIF |
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| 76 | |
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[592] | 77 | IF( lk_vvl ) THEN ! Variable volume |
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| 78 | ! |
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| 79 | z2dt = 2. * rdt ! time step: leap-frog |
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| 80 | IF( neuler == 0 .AND. kt == nit000 ) z2dt = rdt ! time step: Euler if restart from rest |
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| 81 | zraur = 1. / rauw |
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[3] | 82 | |
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[592] | 83 | ! Vertically integrated quantities |
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| 84 | ! -------------------------------- |
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| 85 | zun(:,:) = 0.e0 |
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| 86 | zvn(:,:) = 0.e0 |
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| 87 | ! |
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| 88 | DO jk = 1, jpkm1 ! Vertically integrated transports (now) |
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| 89 | zun(:,:) = zun(:,:) + fse3u(:,:,jk) * un(:,:,jk) |
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| 90 | zvn(:,:) = zvn(:,:) + fse3v(:,:,jk) * vn(:,:,jk) |
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| 91 | END DO |
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| 92 | |
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| 93 | ! Horizontal divergence of barotropic transports |
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| 94 | !-------------------------------------------------- |
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[911] | 95 | zhdiv(:,:) = 0.e0 |
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[592] | 96 | DO jj = 2, jpjm1 |
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| 97 | DO ji = 2, jpim1 ! vector opt. |
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| 98 | zhdiv(ji,jj) = ( e2u(ji ,jj ) * zun(ji ,jj ) & |
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| 99 | & - e2u(ji-1,jj ) * zun(ji-1,jj ) & |
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| 100 | & + e1v(ji ,jj ) * zvn(ji ,jj ) & |
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| 101 | & - e1v(ji ,jj-1) * zvn(ji ,jj-1) ) & |
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| 102 | & / ( e1t(ji,jj) * e2t(ji,jj) ) |
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| 103 | END DO |
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| 104 | END DO |
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| 105 | |
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[1151] | 106 | #if defined key_obc && ( defined key_dynspg_exp || defined key_dynspg_ts ) |
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[592] | 107 | ! open boundaries (div must be zero behind the open boundary) |
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| 108 | ! mpp remark: The zeroing of hdiv can probably be extended to 1->jpi/jpj for the correct row/column |
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| 109 | IF( lp_obc_east ) zhdiv(nie0p1:nie1p1,nje0 :nje1) = 0.e0 ! east |
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| 110 | IF( lp_obc_west ) zhdiv(niw0 :niw1 ,njw0 :njw1) = 0.e0 ! west |
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| 111 | IF( lp_obc_north ) zhdiv(nin0 :nin1 ,njn0p1:njn1p1) = 0.e0 ! north |
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| 112 | IF( lp_obc_south ) zhdiv(nis0 :nis1 ,njs0 :njs1) = 0.e0 ! south |
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| 113 | #endif |
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| 114 | |
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[1125] | 115 | #if defined key_bdy |
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[911] | 116 | jgrd=1 !: tracer grid. |
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| 117 | DO jb = 1, nblenrim(jgrd) |
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| 118 | ji = nbi(jb,jgrd) |
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| 119 | jj = nbj(jb,jgrd) |
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[1040] | 120 | zhdiv(ji,jj) = 0.e0 |
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[911] | 121 | END DO |
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| 122 | #endif |
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| 123 | |
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[592] | 124 | CALL lbc_lnk( zhdiv, 'T', 1. ) |
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| 125 | |
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| 126 | ! Sea surface elevation time stepping |
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| 127 | ! ----------------------------------- |
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| 128 | zssha(:,:) = sshb(:,:) - z2dt * ( zraur * emp(:,:) + zhdiv(:,:) ) * tmask(:,:,1) |
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| 129 | |
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| 130 | ! Vertical velocity computed from bottom |
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| 131 | ! -------------------------------------- |
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| 132 | DO jk = jpkm1, 1, -1 |
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| 133 | wn(:,:,jk) = wn(:,:,jk+1) - fse3t(:,:,jk) * hdivn(:,:,jk) & |
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| 134 | & - ( zssha(:,:) - sshb(:,:) ) * fsve3t(:,:,jk) * mut(:,:,jk) / z2dt |
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| 135 | END DO |
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| 136 | |
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| 137 | ELSE ! Fixed volume |
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| 138 | |
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| 139 | ! Vertical velocity computed from bottom |
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| 140 | ! -------------------------------------- |
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| 141 | DO jk = jpkm1, 1, -1 |
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| 142 | wn(:,:,jk) = wn(:,:,jk+1) - fse3t(:,:,jk) * hdivn(:,:,jk) |
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| 143 | END DO |
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| 144 | |
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| 145 | ENDIF |
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| 146 | |
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[258] | 147 | IF(ln_ctl) CALL prt_ctl(tab3d_1=wn, clinfo1=' w**2 - : ', mask1=wn) |
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[3] | 148 | |
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| 149 | END SUBROUTINE wzv |
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| 150 | |
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| 151 | !!====================================================================== |
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| 152 | END MODULE wzvmod |
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