[3] | 1 | MODULE divcur |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE divcur *** |
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| 4 | !! Ocean diagnostic variable : horizontal divergence and relative vorticity |
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| 5 | !!============================================================================== |
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[2528] | 6 | !! History : OPA ! 1987-06 (P. Andrich, D. L Hostis) Original code |
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| 7 | !! 4.0 ! 1991-11 (G. Madec) |
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| 8 | !! 6.0 ! 1993-03 (M. Guyon) symetrical conditions |
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| 9 | !! 7.0 ! 1996-01 (G. Madec) s-coordinates |
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| 10 | !! 8.0 ! 1997-06 (G. Madec) lateral boundary cond., lbc |
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| 11 | !! 8.1 ! 1997-08 (J.M. Molines) Open boundaries |
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| 12 | !! 8.2 ! 2000-03 (G. Madec) no slip accurate |
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| 13 | !! NEMO 1.0 ! 2002-09 (G. Madec, E. Durand) Free form, F90 |
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| 14 | !! - ! 2005-01 (J. Chanut) Unstructured open boundaries |
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| 15 | !! - ! 2003-08 (G. Madec) merged of cur and div, free form, F90 |
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| 16 | !! - ! 2005-01 (J. Chanut, A. Sellar) unstructured open boundaries |
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| 17 | !! 3.3 ! 2010-09 (D.Storkey and E.O'Dea) bug fixes for BDY module |
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| 18 | !! - ! 2010-10 (R. Furner, G. Madec) runoff and cla added directly here |
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[5120] | 19 | !! 3.6 ! 2014-11 (P. Mathiot) isf added directly here |
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[2528] | 20 | !!---------------------------------------------------------------------- |
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[3] | 21 | |
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| 22 | !!---------------------------------------------------------------------- |
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| 23 | !! div_cur : Compute the horizontal divergence and relative |
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| 24 | !! vorticity fields |
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| 25 | !!---------------------------------------------------------------------- |
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| 26 | USE oce ! ocean dynamics and tracers |
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| 27 | USE dom_oce ! ocean space and time domain |
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[4990] | 28 | USE sbc_oce, ONLY : ln_rnf, nn_isf ! surface boundary condition: ocean |
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[2528] | 29 | USE sbcrnf ! river runoff |
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[4990] | 30 | USE sbcisf ! ice shelf |
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[2528] | 31 | USE cla ! cross land advection (cla_div routine) |
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[3] | 32 | USE in_out_manager ! I/O manager |
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| 33 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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[2715] | 34 | USE lib_mpp ! MPP library |
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[3294] | 35 | USE wrk_nemo ! Memory Allocation |
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| 36 | USE timing ! Timing |
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[3] | 37 | |
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| 38 | IMPLICIT NONE |
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| 39 | PRIVATE |
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| 40 | |
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[2528] | 41 | PUBLIC div_cur ! routine called by step.F90 and istate.F90 |
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[3] | 42 | |
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| 43 | !! * Substitutions |
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| 44 | # include "domzgr_substitute.h90" |
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| 45 | # include "vectopt_loop_substitute.h90" |
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| 46 | !!---------------------------------------------------------------------- |
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[2528] | 47 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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[6486] | 48 | !! $Id$ |
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[2528] | 49 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[3] | 50 | !!---------------------------------------------------------------------- |
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| 51 | CONTAINS |
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| 52 | |
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| 53 | #if defined key_noslip_accurate |
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| 54 | !!---------------------------------------------------------------------- |
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[2715] | 55 | !! 'key_noslip_accurate' 2nd order interior + 4th order at the coast |
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[3] | 56 | !!---------------------------------------------------------------------- |
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| 57 | |
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| 58 | SUBROUTINE div_cur( kt ) |
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| 59 | !!---------------------------------------------------------------------- |
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| 60 | !! *** ROUTINE div_cur *** |
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| 61 | !! |
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| 62 | !! ** Purpose : compute the horizontal divergence and the relative |
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[2715] | 63 | !! vorticity at before and now time-step |
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[3] | 64 | !! |
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[2528] | 65 | !! ** Method : I. divergence : |
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[3] | 66 | !! - save the divergence computed at the previous time-step |
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| 67 | !! (note that the Asselin filter has not been applied on hdivb) |
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| 68 | !! - compute the now divergence given by : |
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| 69 | !! hdivn = 1/(e1t*e2t*e3t) ( di[e2u*e3u un] + dj[e1v*e3v vn] ) |
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[4990] | 70 | !! correct hdiv with runoff inflow (div_rnf), ice shelf melting (div_isf) |
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| 71 | !! and cross land flow (div_cla) |
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[2528] | 72 | !! II. vorticity : |
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[3] | 73 | !! - save the curl computed at the previous time-step |
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| 74 | !! rotb = rotn |
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| 75 | !! (note that the Asselin time filter has not been applied to rotb) |
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| 76 | !! - compute the now curl in tensorial formalism: |
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| 77 | !! rotn = 1/(e1f*e2f) ( di[e2v vn] - dj[e1u un] ) |
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| 78 | !! - Coastal boundary condition: 'key_noslip_accurate' defined, |
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| 79 | !! the no-slip boundary condition is computed using Schchepetkin |
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| 80 | !! and O'Brien (1996) scheme (i.e. 4th order at the coast). |
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| 81 | !! For example, along east coast, the one-sided finite difference |
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| 82 | !! approximation used for di[v] is: |
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[2528] | 83 | !! di[e2v vn] = 1/(e1f*e2f) * ( (e2v vn)(i) + (e2v vn)(i-1) + (e2v vn)(i-2) ) |
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[3] | 84 | !! |
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| 85 | !! ** Action : - update hdivb, hdivn, the before & now hor. divergence |
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| 86 | !! - update rotb , rotn , the before & now rel. vorticity |
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| 87 | !!---------------------------------------------------------------------- |
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[2715] | 88 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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[2528] | 89 | ! |
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[2715] | 90 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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| 91 | INTEGER :: ii, ij, ijt, iju, ierr ! local integer |
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| 92 | REAL(wp) :: zraur, zdep ! local scalar |
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[3294] | 93 | REAL(wp), POINTER, DIMENSION(:,:) :: zwu ! specific 2D workspace |
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| 94 | REAL(wp), POINTER, DIMENSION(:,:) :: zwv ! specific 2D workspace |
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[3] | 95 | !!---------------------------------------------------------------------- |
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[3294] | 96 | ! |
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| 97 | IF( nn_timing == 1 ) CALL timing_start('div_cur') |
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| 98 | ! |
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[6487] | 99 | CALL wrk_alloc( jpi , jpj+2, zwu ) |
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| 100 | CALL wrk_alloc( jpi+2, jpj , zwv ) |
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[3294] | 101 | ! |
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[3] | 102 | IF( kt == nit000 ) THEN |
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| 103 | IF(lwp) WRITE(numout,*) |
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| 104 | IF(lwp) WRITE(numout,*) 'div_cur : horizontal velocity divergence and relative vorticity' |
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| 105 | IF(lwp) WRITE(numout,*) '~~~~~~~ NOT optimal for auto-tasking case' |
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| 106 | ENDIF |
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| 107 | |
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| 108 | ! ! =============== |
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| 109 | DO jk = 1, jpkm1 ! Horizontal slab |
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| 110 | ! ! =============== |
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[2528] | 111 | ! |
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[3] | 112 | hdivb(:,:,jk) = hdivn(:,:,jk) ! time swap of div arrays |
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| 113 | rotb (:,:,jk) = rotn (:,:,jk) ! time swap of rot arrays |
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[2528] | 114 | ! |
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[3] | 115 | ! ! -------- |
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| 116 | ! Horizontal divergence ! div |
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| 117 | ! ! -------- |
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| 118 | DO jj = 2, jpjm1 |
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| 119 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 120 | hdivn(ji,jj,jk) = & |
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[455] | 121 | ( e2u(ji,jj)*fse3u(ji,jj,jk) * un(ji,jj,jk) - e2u(ji-1,jj )*fse3u(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
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| 122 | + e1v(ji,jj)*fse3v(ji,jj,jk) * vn(ji,jj,jk) - e1v(ji ,jj-1)*fse3v(ji ,jj-1,jk) * vn(ji ,jj-1,jk) ) & |
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[3] | 123 | / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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| 124 | END DO |
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| 125 | END DO |
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| 126 | |
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[1792] | 127 | IF( .NOT. AGRIF_Root() ) THEN |
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| 128 | IF ((nbondi == 1).OR.(nbondi == 2)) hdivn(nlci-1 , : ,jk) = 0.e0 ! east |
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| 129 | IF ((nbondi == -1).OR.(nbondi == 2)) hdivn(2 , : ,jk) = 0.e0 ! west |
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| 130 | IF ((nbondj == 1).OR.(nbondj == 2)) hdivn(: ,nlcj-1 ,jk) = 0.e0 ! north |
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| 131 | IF ((nbondj == -1).OR.(nbondj == 2)) hdivn(: ,2 ,jk) = 0.e0 ! south |
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| 132 | ENDIF |
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[3] | 133 | |
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| 134 | ! ! -------- |
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| 135 | ! relative vorticity ! rot |
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| 136 | ! ! -------- |
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| 137 | ! contravariant velocity (extended for lateral b.c.) |
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| 138 | ! inside the model domain |
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| 139 | DO jj = 1, jpj |
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| 140 | DO ji = 1, jpi |
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| 141 | zwu(ji,jj) = e1u(ji,jj) * un(ji,jj,jk) |
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| 142 | zwv(ji,jj) = e2v(ji,jj) * vn(ji,jj,jk) |
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| 143 | END DO |
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| 144 | END DO |
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| 145 | |
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| 146 | ! East-West boundary conditions |
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| 147 | IF( nperio == 1 .OR. nperio == 4 .OR. nperio == 6) THEN |
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| 148 | zwv( 0 ,:) = zwv(jpi-2,:) |
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| 149 | zwv( -1 ,:) = zwv(jpi-3,:) |
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| 150 | zwv(jpi+1,:) = zwv( 3 ,:) |
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| 151 | zwv(jpi+2,:) = zwv( 4 ,:) |
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| 152 | ELSE |
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| 153 | zwv( 0 ,:) = 0.e0 |
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| 154 | zwv( -1 ,:) = 0.e0 |
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| 155 | zwv(jpi+1,:) = 0.e0 |
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| 156 | zwv(jpi+2,:) = 0.e0 |
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| 157 | ENDIF |
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| 158 | |
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| 159 | ! North-South boundary conditions |
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| 160 | IF( nperio == 3 .OR. nperio == 4 ) THEN |
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| 161 | ! north fold ( Grid defined with a T-point pivot) ORCA 2 degre |
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| 162 | zwu(jpi,jpj+1) = 0.e0 |
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| 163 | zwu(jpi,jpj+2) = 0.e0 |
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| 164 | DO ji = 1, jpi-1 |
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| 165 | iju = jpi - ji + 1 |
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| 166 | zwu(ji,jpj+1) = - zwu(iju,jpj-3) |
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| 167 | zwu(ji,jpj+2) = - zwu(iju,jpj-4) |
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| 168 | END DO |
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| 169 | ELSEIF( nperio == 5 .OR. nperio == 6 ) THEN |
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| 170 | ! north fold ( Grid defined with a F-point pivot) ORCA 0.5 degre\ |
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| 171 | zwu(jpi,jpj+1) = 0.e0 |
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| 172 | zwu(jpi,jpj+2) = 0.e0 |
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| 173 | DO ji = 1, jpi-1 |
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| 174 | iju = jpi - ji |
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| 175 | zwu(ji,jpj ) = - zwu(iju,jpj-1) |
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| 176 | zwu(ji,jpj+1) = - zwu(iju,jpj-2) |
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| 177 | zwu(ji,jpj+2) = - zwu(iju,jpj-3) |
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| 178 | END DO |
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| 179 | DO ji = -1, jpi+2 |
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| 180 | ijt = jpi - ji + 1 |
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| 181 | zwv(ji,jpj) = - zwv(ijt,jpj-2) |
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| 182 | END DO |
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| 183 | DO ji = jpi/2+1, jpi+2 |
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| 184 | ijt = jpi - ji + 1 |
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| 185 | zwv(ji,jpjm1) = - zwv(ijt,jpjm1) |
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| 186 | END DO |
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| 187 | ELSE |
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| 188 | ! closed |
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| 189 | zwu(:,jpj+1) = 0.e0 |
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| 190 | zwu(:,jpj+2) = 0.e0 |
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| 191 | ENDIF |
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| 192 | |
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| 193 | ! relative vorticity (vertical component of the velocity curl) |
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| 194 | DO jj = 1, jpjm1 |
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| 195 | DO ji = 1, fs_jpim1 ! vector opt. |
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| 196 | rotn(ji,jj,jk) = ( zwv(ji+1,jj ) - zwv(ji,jj) & |
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[2528] | 197 | & - zwu(ji ,jj+1) + zwu(ji,jj) ) * fmask(ji,jj,jk) / ( e1f(ji,jj)*e2f(ji,jj) ) |
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[3] | 198 | END DO |
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| 199 | END DO |
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| 200 | |
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| 201 | ! second order accurate scheme along straight coast |
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| 202 | DO jl = 1, npcoa(1,jk) |
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| 203 | ii = nicoa(jl,1,jk) |
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| 204 | ij = njcoa(jl,1,jk) |
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| 205 | rotn(ii,ij,jk) = 1. / ( e1f(ii,ij) * e2f(ii,ij) ) & |
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| 206 | * ( + 4. * zwv(ii+1,ij) - zwv(ii+2,ij) + 0.2 * zwv(ii+3,ij) ) |
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| 207 | END DO |
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| 208 | DO jl = 1, npcoa(2,jk) |
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| 209 | ii = nicoa(jl,2,jk) |
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| 210 | ij = njcoa(jl,2,jk) |
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| 211 | rotn(ii,ij,jk) = 1./(e1f(ii,ij)*e2f(ii,ij)) & |
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| 212 | *(-4.*zwv(ii,ij)+zwv(ii-1,ij)-0.2*zwv(ii-2,ij)) |
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| 213 | END DO |
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| 214 | DO jl = 1, npcoa(3,jk) |
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| 215 | ii = nicoa(jl,3,jk) |
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| 216 | ij = njcoa(jl,3,jk) |
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| 217 | rotn(ii,ij,jk) = -1. / ( e1f(ii,ij)*e2f(ii,ij) ) & |
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| 218 | * ( +4. * zwu(ii,ij+1) - zwu(ii,ij+2) + 0.2 * zwu(ii,ij+3) ) |
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| 219 | END DO |
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| 220 | DO jl = 1, npcoa(4,jk) |
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| 221 | ii = nicoa(jl,4,jk) |
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| 222 | ij = njcoa(jl,4,jk) |
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| 223 | rotn(ii,ij,jk) = -1. / ( e1f(ii,ij)*e2f(ii,ij) ) & |
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| 224 | * ( -4. * zwu(ii,ij) + zwu(ii,ij-1) - 0.2 * zwu(ii,ij-2) ) |
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| 225 | END DO |
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| 226 | ! ! =============== |
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| 227 | END DO ! End of slab |
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| 228 | ! ! =============== |
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[2528] | 229 | |
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[4990] | 230 | IF( ln_rnf ) CALL sbc_rnf_div( hdivn ) ! runoffs (update hdivn field) |
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| 231 | IF( ln_divisf .AND. (nn_isf /= 0) ) CALL sbc_isf_div( hdivn ) ! ice shelf (update hdivn field) |
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| 232 | IF( nn_cla == 1 ) CALL cla_div ( kt ) ! Cross Land Advection (Update Hor. divergence) |
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[3] | 233 | |
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| 234 | ! 4. Lateral boundary conditions on hdivn and rotn |
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| 235 | ! ---------------------------------=======---====== |
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[2528] | 236 | CALL lbc_lnk( hdivn, 'T', 1. ) ; CALL lbc_lnk( rotn , 'F', 1. ) ! lateral boundary cond. (no sign change) |
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| 237 | ! |
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[6487] | 238 | CALL wrk_dealloc( jpi , jpj+2, zwu ) |
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| 239 | CALL wrk_dealloc( jpi+2, jpj , zwv ) |
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[3294] | 240 | ! |
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| 241 | IF( nn_timing == 1 ) CALL timing_stop('div_cur') |
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| 242 | ! |
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[3] | 243 | END SUBROUTINE div_cur |
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| 244 | |
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| 245 | #else |
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| 246 | !!---------------------------------------------------------------------- |
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| 247 | !! Default option 2nd order centered schemes |
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| 248 | !!---------------------------------------------------------------------- |
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| 249 | |
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| 250 | SUBROUTINE div_cur( kt ) |
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| 251 | !!---------------------------------------------------------------------- |
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| 252 | !! *** ROUTINE div_cur *** |
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| 253 | !! |
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| 254 | !! ** Purpose : compute the horizontal divergence and the relative |
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| 255 | !! vorticity at before and now time-step |
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| 256 | !! |
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| 257 | !! ** Method : - Divergence: |
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| 258 | !! - save the divergence computed at the previous time-step |
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| 259 | !! (note that the Asselin filter has not been applied on hdivb) |
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| 260 | !! - compute the now divergence given by : |
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| 261 | !! hdivn = 1/(e1t*e2t*e3t) ( di[e2u*e3u un] + dj[e1v*e3v vn] ) |
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[2528] | 262 | !! correct hdiv with runoff inflow (div_rnf) and cross land flow (div_cla) |
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[3] | 263 | !! - Relavtive Vorticity : |
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| 264 | !! - save the curl computed at the previous time-step (rotb = rotn) |
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| 265 | !! (note that the Asselin time filter has not been applied to rotb) |
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| 266 | !! - compute the now curl in tensorial formalism: |
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| 267 | !! rotn = 1/(e1f*e2f) ( di[e2v vn] - dj[e1u un] ) |
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| 268 | !! Note: Coastal boundary condition: lateral friction set through |
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| 269 | !! the value of fmask along the coast (see dommsk.F90) and shlat |
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| 270 | !! (namelist parameter) |
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| 271 | !! |
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| 272 | !! ** Action : - update hdivb, hdivn, the before & now hor. divergence |
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| 273 | !! - update rotb , rotn , the before & now rel. vorticity |
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| 274 | !!---------------------------------------------------------------------- |
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[2715] | 275 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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[2528] | 276 | ! |
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[2715] | 277 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 278 | REAL(wp) :: zraur, zdep ! local scalars |
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[3] | 279 | !!---------------------------------------------------------------------- |
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[3294] | 280 | ! |
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| 281 | IF( nn_timing == 1 ) CALL timing_start('div_cur') |
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| 282 | ! |
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[3] | 283 | IF( kt == nit000 ) THEN |
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| 284 | IF(lwp) WRITE(numout,*) |
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| 285 | IF(lwp) WRITE(numout,*) 'div_cur : horizontal velocity divergence and' |
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| 286 | IF(lwp) WRITE(numout,*) '~~~~~~~ relative vorticity' |
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| 287 | ENDIF |
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| 288 | |
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| 289 | ! ! =============== |
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| 290 | DO jk = 1, jpkm1 ! Horizontal slab |
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| 291 | ! ! =============== |
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[2528] | 292 | ! |
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[3] | 293 | hdivb(:,:,jk) = hdivn(:,:,jk) ! time swap of div arrays |
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| 294 | rotb (:,:,jk) = rotn (:,:,jk) ! time swap of rot arrays |
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[2528] | 295 | ! |
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[3] | 296 | ! ! -------- |
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| 297 | ! Horizontal divergence ! div |
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| 298 | ! ! -------- |
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| 299 | DO jj = 2, jpjm1 |
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| 300 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[455] | 301 | hdivn(ji,jj,jk) = & |
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[2528] | 302 | ( e2u(ji,jj)*fse3u(ji,jj,jk) * un(ji,jj,jk) - e2u(ji-1,jj)*fse3u(ji-1,jj,jk) * un(ji-1,jj,jk) & |
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| 303 | + e1v(ji,jj)*fse3v(ji,jj,jk) * vn(ji,jj,jk) - e1v(ji,jj-1)*fse3v(ji,jj-1,jk) * vn(ji,jj-1,jk) ) & |
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[455] | 304 | / ( e1t(ji,jj) * e2t(ji,jj) * fse3t(ji,jj,jk) ) |
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[3] | 305 | END DO |
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| 306 | END DO |
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| 307 | |
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[1792] | 308 | IF( .NOT. AGRIF_Root() ) THEN |
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[780] | 309 | IF ((nbondi == 1).OR.(nbondi == 2)) hdivn(nlci-1 , : ,jk) = 0.e0 ! east |
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| 310 | IF ((nbondi == -1).OR.(nbondi == 2)) hdivn(2 , : ,jk) = 0.e0 ! west |
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| 311 | IF ((nbondj == 1).OR.(nbondj == 2)) hdivn(: ,nlcj-1 ,jk) = 0.e0 ! north |
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| 312 | IF ((nbondj == -1).OR.(nbondj == 2)) hdivn(: ,2 ,jk) = 0.e0 ! south |
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[1792] | 313 | ENDIF |
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[780] | 314 | |
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[3] | 315 | ! ! -------- |
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| 316 | ! relative vorticity ! rot |
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| 317 | ! ! -------- |
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| 318 | DO jj = 1, jpjm1 |
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| 319 | DO ji = 1, fs_jpim1 ! vector opt. |
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| 320 | rotn(ji,jj,jk) = ( e2v(ji+1,jj ) * vn(ji+1,jj ,jk) - e2v(ji,jj) * vn(ji,jj,jk) & |
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| 321 | & - e1u(ji ,jj+1) * un(ji ,jj+1,jk) + e1u(ji,jj) * un(ji,jj,jk) ) & |
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| 322 | & * fmask(ji,jj,jk) / ( e1f(ji,jj) * e2f(ji,jj) ) |
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| 323 | END DO |
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| 324 | END DO |
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| 325 | ! ! =============== |
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| 326 | END DO ! End of slab |
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| 327 | ! ! =============== |
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[2528] | 328 | |
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[4990] | 329 | IF( ln_rnf ) CALL sbc_rnf_div( hdivn ) ! runoffs (update hdivn field) |
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| 330 | IF( ln_divisf .AND. (nn_isf .GT. 0) ) CALL sbc_isf_div( hdivn ) ! ice shelf (update hdivn field) |
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[2528] | 331 | IF( nn_cla == 1 ) CALL cla_div ( kt ) ! Cross Land Advection (update hdivn field) |
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[2715] | 332 | ! |
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[2528] | 333 | CALL lbc_lnk( hdivn, 'T', 1. ) ; CALL lbc_lnk( rotn , 'F', 1. ) ! lateral boundary cond. (no sign change) |
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| 334 | ! |
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[3294] | 335 | IF( nn_timing == 1 ) CALL timing_stop('div_cur') |
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| 336 | ! |
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[3] | 337 | END SUBROUTINE div_cur |
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| 338 | |
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| 339 | #endif |
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| 340 | !!====================================================================== |
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| 341 | END MODULE divcur |
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