| 1 | MODULE traldf_iso |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE traldf_iso *** |
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| 4 | !! Ocean tracers: horizontal component of the lateral tracer mixing trend |
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| 5 | !!====================================================================== |
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| 6 | !! History : OPA ! 1994-08 (G. Madec, M. Imbard) |
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| 7 | !! 8.0 ! 1997-05 (G. Madec) split into traldf and trazdf |
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| 8 | !! NEMO ! 2002-08 (G. Madec) Free form, F90 |
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| 9 | !! 1.0 ! 2005-11 (G. Madec) merge traldf and trazdf :-) |
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| 10 | !! 3.3 ! 2010-09 (C. Ethe, G. Madec) Merge TRA-TRC |
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| 11 | !! 3.7 ! 2014-01 (G. Madec, S. Masson) restructuration/simplification of aht/aeiv specification |
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| 12 | !! - ! 2014-02 (F. Lemarie, G. Madec) triad operator (Griffies) + Method of Stabilizing Correction |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | |
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| 15 | !!---------------------------------------------------------------------- |
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| 16 | !! tra_ldf_iso : update the tracer trend with the horizontal component of a iso-neutral laplacian operator |
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| 17 | !! and with the vertical part of the isopycnal or geopotential s-coord. operator |
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| 18 | !!---------------------------------------------------------------------- |
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| 19 | USE par_kind |
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| 20 | USE len_oce ! ocean dynamics and active tracers |
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| 21 | ! |
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| 22 | USE in_out_manager ! I/O manager |
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| 23 | |
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| 24 | IMPLICIT NONE |
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| 25 | |
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| 26 | PUBLIC tra_ldf_iso ! routine called by step.F90 |
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| 27 | |
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| 28 | !! * Substitutions |
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| 29 | # include "vectopt_loop_substitute.h90" |
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| 30 | !!---------------------------------------------------------------------- |
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| 31 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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| 32 | !! $Id$ |
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| 33 | !! Software governed by the CeCILL licence (./LICENSE) |
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| 34 | !!---------------------------------------------------------------------- |
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| 35 | CONTAINS |
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| 36 | |
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| 37 | SUBROUTINE tra_ldf_iso( ln_traldf_msc, ln_traldf_blp, ln_traldf_lap, ln_zps, ln_isfcav, kjpt, kpass, r2dt, & |
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| 38 | & e1t, e1u, e1v, e2t, e2u, e2v, e1e2t, e1_e2v, e2_e1u, r1_e1e2t, mbku, mbkv, miku, mikv, & |
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| 39 | & umask, vmask, wmask, e3t_n, e3u_n, e3v_n, e3w_n, wslpi, wslpj, uslp, vslp, & |
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| 40 | & pahu, pahv, pgu, pgv, pgui, pgvi, ptb , ptbb, & |
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| 41 | & akz, ah_wslp2, pta ) |
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| 42 | |
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| 43 | !!---------------------------------------------------------------------- |
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| 44 | !! *** ROUTINE tra_ldf_iso *** |
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| 45 | !! |
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| 46 | !! ** Purpose : Compute the before horizontal tracer (t & s) diffusive |
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| 47 | !! trend for a laplacian tensor (ezxcept the dz[ dz[.] ] term) and |
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| 48 | !! add it to the general trend of tracer equation. |
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| 49 | !! |
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| 50 | !! ** Method : The horizontal component of the lateral diffusive trends |
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| 51 | !! is provided by a 2nd order operator rotated along neural or geopo- |
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| 52 | !! tential surfaces to which an eddy induced advection can be added |
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| 53 | !! It is computed using before fields (forward in time) and isopyc- |
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| 54 | !! nal or geopotential slopes computed in routine ldfslp. |
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| 55 | !! |
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| 56 | !! 1st part : masked horizontal derivative of T ( di[ t ] ) |
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| 57 | !! ======== with partial cell update if ln_zps=T |
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| 58 | !! with top cell update if ln_isfcav |
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| 59 | !! |
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| 60 | !! 2nd part : horizontal fluxes of the lateral mixing operator |
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| 61 | !! ======== |
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| 62 | !! zftu = pahu e2u*e3u/e1u di[ tb ] |
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| 63 | !! - pahu e2u*uslp dk[ mi(mk(tb)) ] |
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| 64 | !! zftv = pahv e1v*e3v/e2v dj[ tb ] |
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| 65 | !! - pahv e2u*vslp dk[ mj(mk(tb)) ] |
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| 66 | !! take the horizontal divergence of the fluxes: |
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| 67 | !! difft = 1/(e1e2t*e3t) { di-1[ zftu ] + dj-1[ zftv ] } |
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| 68 | !! Add this trend to the general trend (ta,sa): |
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| 69 | !! ta = ta + difft |
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| 70 | !! |
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| 71 | !! 3rd part: vertical trends of the lateral mixing operator |
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| 72 | !! ======== (excluding the vertical flux proportional to dk[t] ) |
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| 73 | !! vertical fluxes associated with the rotated lateral mixing: |
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| 74 | !! zftw = - { mi(mk(pahu)) * e2t*wslpi di[ mi(mk(tb)) ] |
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| 75 | !! + mj(mk(pahv)) * e1t*wslpj dj[ mj(mk(tb)) ] } |
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| 76 | !! take the horizontal divergence of the fluxes: |
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| 77 | !! difft = 1/(e1e2t*e3t) dk[ zftw ] |
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| 78 | !! Add this trend to the general trend (ta,sa): |
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| 79 | !! pta = pta + difft |
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| 80 | !! |
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| 81 | !! ** Action : Update pta arrays with the before rotated diffusion |
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| 82 | !!---------------------------------------------------------------------- |
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| 83 | LOGICAL , INTENT(in ) :: ln_traldf_msc, ln_traldf_blp, ln_traldf_lap, ln_zps, ln_isfcav |
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| 84 | INTEGER , INTENT(in ) :: kjpt ! number of tracers passed in |
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| 85 | INTEGER , INTENT(in ) :: kpass ! =1/2 first or second passage |
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| 86 | REAL(wp) , INTENT(in ) :: r2dt ! 2 . dt |
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| 87 | REAL(wp), DIMENSION(jpi,jpj) , INTENT(in ) :: e1t, e1u, e1v, e2t, e2u, e2v, e1e2t, e1_e2v, e2_e1u, r1_e1e2t |
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| 88 | INTEGER, DIMENSION(jpi,jpj) , INTENT(in ) :: mbku, mbkv, miku, mikv |
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| 89 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT(in ) :: umask, vmask, wmask |
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| 90 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT(in ) :: e3t_n, e3u_n, e3v_n, e3w_n, wslpi, wslpj, uslp, vslp |
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| 91 | |
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| 92 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT(in ) :: pahu, pahv ! eddy diffusivity at u- and v-points [m2/s] |
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| 93 | REAL(wp), DIMENSION(jpi,jpj ,kjpt), INTENT(in ) :: pgu, pgv ! tracer gradient at pstep levels |
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| 94 | REAL(wp), DIMENSION(jpi,jpj, kjpt), INTENT(in ) :: pgui, pgvi ! tracer gradient at top levels |
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| 95 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: ptb ! tracer (kpass=1) or laplacian of tracer (kpass=2) |
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| 96 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(in ) :: ptbb ! tracer (only used in kpass=2) |
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| 97 | |
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| 98 | REAL(wp), DIMENSION(jpi,jpj,jpk) , INTENT(inout) :: akz, ah_wslp2 ! mainly OUT; IN only for unused points on edges |
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| 99 | REAL(wp), DIMENSION(jpi,jpj,jpk,kjpt), INTENT(inout) :: pta ! tracer trend |
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| 100 | |
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| 101 | ! |
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| 102 | INTEGER :: ji, jj, jk, jn ! dummy loop indices |
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| 103 | INTEGER :: ikt |
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| 104 | INTEGER :: ierr ! local integer |
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| 105 | REAL(wp) :: zmsku, zahu_w, zabe1, zcof1, zcoef3 ! local scalars |
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| 106 | REAL(wp) :: zmskv, zahv_w, zabe2, zcof2, zcoef4 ! - - |
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| 107 | REAL(wp) :: zcoef0, ze3w_2, zsign, z2dt, z1_2dt ! - - |
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| 108 | REAL(wp) ,ALLOCATABLE, DIMENSION(:,:) :: zdkt, zdk1t, z2d ! Make these use global scratch at some point |
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| 109 | REAL(wp) ,ALLOCATABLE, DIMENSION(:,:,:) :: zdit, zdjt, zftu, zftv, ztfw |
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| 110 | |
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| 111 | ALLOCATE(zdkt(jpi,jpj),zdk1t(jpi,jpj),z2d(jpi,jpj)) |
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| 112 | ALLOCATE(zdit(jpi,jpj,jpk),zdjt(jpi,jpj,jpk),zftu(jpi,jpj,jpk),zftv(jpi,jpj,jpk),ztfw(jpi,jpj,jpk)) |
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| 113 | !!---------------------------------------------------------------------- |
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| 114 | ! |
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| 115 | ! |
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| 116 | ! |
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| 117 | ! ! set time step size (Euler/Leapfrog) |
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| 118 | z1_2dt = 1._wp / r2dt ! note this was dependent on kt and neuler before |
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| 119 | ! |
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| 120 | IF( kpass == 1 ) THEN ; zsign = 1._wp ! bilaplacian operator require a minus sign (eddy diffusivity >0) |
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| 121 | ELSE ; zsign = -1._wp |
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| 122 | ENDIF |
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| 123 | |
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| 124 | !!---------------------------------------------------------------------- |
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| 125 | !! 0 - calculate ah_wslp2 and akz |
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| 126 | !!---------------------------------------------------------------------- |
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| 127 | ! |
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| 128 | IF( kpass == 1 ) THEN !== first pass only ==! |
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| 129 | ! |
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| 130 | DO jk = 2, jpkm1 |
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| 131 | DO jj = 2, jpjm1 |
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| 132 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 133 | ! |
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| 134 | zmsku = wmask(ji,jj,jk) / MAX( umask(ji ,jj,jk-1) + umask(ji-1,jj,jk) & |
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| 135 | & + umask(ji-1,jj,jk-1) + umask(ji ,jj,jk) , 1._wp ) |
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| 136 | zmskv = wmask(ji,jj,jk) / MAX( vmask(ji,jj ,jk-1) + vmask(ji,jj-1,jk) & |
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| 137 | & + vmask(ji,jj-1,jk-1) + vmask(ji,jj ,jk) , 1._wp ) |
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| 138 | ! |
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| 139 | zahu_w = ( pahu(ji ,jj,jk-1) + pahu(ji-1,jj,jk) & |
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| 140 | & + pahu(ji-1,jj,jk-1) + pahu(ji ,jj,jk) ) * zmsku |
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| 141 | zahv_w = ( pahv(ji,jj ,jk-1) + pahv(ji,jj-1,jk) & |
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| 142 | & + pahv(ji,jj-1,jk-1) + pahv(ji,jj ,jk) ) * zmskv |
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| 143 | ! |
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| 144 | ah_wslp2(ji,jj,jk) = zahu_w * wslpi(ji,jj,jk) * wslpi(ji,jj,jk) & |
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| 145 | & + zahv_w * wslpj(ji,jj,jk) * wslpj(ji,jj,jk) |
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| 146 | END DO |
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| 147 | END DO |
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| 148 | END DO |
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| 149 | ! |
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| 150 | IF( ln_traldf_msc ) THEN ! stabilizing vertical diffusivity coefficient |
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| 151 | DO jk = 2, jpkm1 |
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| 152 | DO jj = 2, jpjm1 |
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| 153 | DO ji = fs_2, fs_jpim1 |
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| 154 | akz(ji,jj,jk) = 0.25_wp * ( & |
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| 155 | & ( pahu(ji ,jj,jk) + pahu(ji ,jj,jk-1) ) / ( e1u(ji ,jj) * e1u(ji ,jj) ) & |
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| 156 | & + ( pahu(ji-1,jj,jk) + pahu(ji-1,jj,jk-1) ) / ( e1u(ji-1,jj) * e1u(ji-1,jj) ) & |
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| 157 | & + ( pahv(ji,jj ,jk) + pahv(ji,jj ,jk-1) ) / ( e2v(ji,jj ) * e2v(ji,jj ) ) & |
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| 158 | & + ( pahv(ji,jj-1,jk) + pahv(ji,jj-1,jk-1) ) / ( e2v(ji,jj-1) * e2v(ji,jj-1) ) ) |
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| 159 | END DO |
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| 160 | END DO |
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| 161 | END DO |
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| 162 | ! |
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| 163 | IF( ln_traldf_blp ) THEN ! bilaplacian operator |
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| 164 | DO jk = 2, jpkm1 |
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| 165 | DO jj = 1, jpjm1 |
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| 166 | DO ji = 1, fs_jpim1 |
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| 167 | akz(ji,jj,jk) = 16._wp * ah_wslp2(ji,jj,jk) & |
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| 168 | & * ( akz(ji,jj,jk) + ah_wslp2(ji,jj,jk) / ( e3w_n(ji,jj,jk) * e3w_n(ji,jj,jk) ) ) |
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| 169 | END DO |
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| 170 | END DO |
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| 171 | END DO |
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| 172 | ELSEIF( ln_traldf_lap ) THEN ! laplacian operator |
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| 173 | DO jk = 2, jpkm1 |
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| 174 | DO jj = 1, jpjm1 |
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| 175 | DO ji = 1, fs_jpim1 |
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| 176 | ze3w_2 = e3w_n(ji,jj,jk) * e3w_n(ji,jj,jk) |
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| 177 | zcoef0 = z2dt * ( akz(ji,jj,jk) + ah_wslp2(ji,jj,jk) / ze3w_2 ) |
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| 178 | akz(ji,jj,jk) = MAX( zcoef0 - 0.5_wp , 0._wp ) * ze3w_2 * z1_2dt |
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| 179 | END DO |
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| 180 | END DO |
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| 181 | END DO |
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| 182 | ENDIF |
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| 183 | ! |
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| 184 | ELSE ! 33 flux set to zero with akz=ah_wslp2 ==>> computed in full implicit |
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| 185 | akz(:,:,:) = ah_wslp2(:,:,:) |
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| 186 | ENDIF |
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| 187 | ENDIF |
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| 188 | ! |
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| 189 | ! ! =========== |
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| 190 | DO jn = 1, kjpt ! tracer loop |
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| 191 | ! ! =========== |
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| 192 | ! |
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| 193 | !!---------------------------------------------------------------------- |
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| 194 | !! I - masked horizontal derivative |
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| 195 | !!---------------------------------------------------------------------- |
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| 196 | !!gm : bug.... why (x,:,:)? (1,jpj,:) and (jpi,1,:) should be sufficient.... |
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| 197 | zdit (1,:,:) = 0._wp ; zdit (jpi,:,:) = 0._wp |
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| 198 | zdjt (1,:,:) = 0._wp ; zdjt (jpi,:,:) = 0._wp |
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| 199 | !!end |
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| 200 | |
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| 201 | ! Horizontal tracer gradient |
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| 202 | DO jk = 1, jpkm1 |
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| 203 | DO jj = 1, jpjm1 |
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| 204 | DO ji = 1, fs_jpim1 ! vector opt. |
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| 205 | zdit(ji,jj,jk) = ( ptb(ji+1,jj ,jk,jn) - ptb(ji,jj,jk,jn) ) * umask(ji,jj,jk) |
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| 206 | zdjt(ji,jj,jk) = ( ptb(ji ,jj+1,jk,jn) - ptb(ji,jj,jk,jn) ) * vmask(ji,jj,jk) |
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| 207 | END DO |
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| 208 | END DO |
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| 209 | END DO |
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| 210 | IF( ln_zps ) THEN ! botton and surface ocean correction of the horizontal gradient |
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| 211 | DO jj = 1, jpjm1 ! bottom correction (partial bottom cell) |
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| 212 | DO ji = 1, fs_jpim1 ! vector opt. |
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| 213 | zdit(ji,jj,mbku(ji,jj)) = pgu(ji,jj,jn) |
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| 214 | zdjt(ji,jj,mbkv(ji,jj)) = pgv(ji,jj,jn) |
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| 215 | END DO |
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| 216 | END DO |
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| 217 | IF( ln_isfcav ) THEN ! first wet level beneath a cavity |
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| 218 | DO jj = 1, jpjm1 |
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| 219 | DO ji = 1, fs_jpim1 ! vector opt. |
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| 220 | IF( miku(ji,jj) > 1 ) zdit(ji,jj,miku(ji,jj)) = pgui(ji,jj,jn) |
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| 221 | IF( mikv(ji,jj) > 1 ) zdjt(ji,jj,mikv(ji,jj)) = pgvi(ji,jj,jn) |
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| 222 | END DO |
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| 223 | END DO |
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| 224 | ENDIF |
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| 225 | ENDIF |
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| 226 | ! |
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| 227 | !!---------------------------------------------------------------------- |
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| 228 | !! II - horizontal trend (full) |
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| 229 | !!---------------------------------------------------------------------- |
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| 230 | ! |
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| 231 | DO jk = 1, jpkm1 ! Horizontal slab |
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| 232 | ! |
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| 233 | ! !== Vertical tracer gradient |
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| 234 | zdk1t(:,:) = ( ptb(:,:,jk,jn) - ptb(:,:,jk+1,jn) ) * wmask(:,:,jk+1) ! level jk+1 |
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| 235 | ! |
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| 236 | IF( jk == 1 ) THEN ; zdkt(:,:) = zdk1t(:,:) ! surface: zdkt(jk=1)=zdkt(jk=2) |
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| 237 | ELSE ; zdkt(:,:) = ( ptb(:,:,jk-1,jn) - ptb(:,:,jk,jn) ) * wmask(:,:,jk) |
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| 238 | ENDIF |
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| 239 | DO jj = 1 , jpjm1 !== Horizontal fluxes |
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| 240 | DO ji = 1, fs_jpim1 ! vector opt. |
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| 241 | zabe1 = pahu(ji,jj,jk) * e2_e1u(ji,jj) * e3u_n(ji,jj,jk) |
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| 242 | zabe2 = pahv(ji,jj,jk) * e1_e2v(ji,jj) * e3v_n(ji,jj,jk) |
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| 243 | ! |
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| 244 | zmsku = 1._wp / MAX( wmask(ji+1,jj,jk ) + wmask(ji,jj,jk+1) & |
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| 245 | & + wmask(ji+1,jj,jk+1) + wmask(ji,jj,jk ), 1._wp ) |
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| 246 | ! |
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| 247 | zmskv = 1._wp / MAX( wmask(ji,jj+1,jk ) + wmask(ji,jj,jk+1) & |
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| 248 | & + wmask(ji,jj+1,jk+1) + wmask(ji,jj,jk ), 1._wp ) |
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| 249 | ! |
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| 250 | zcof1 = - pahu(ji,jj,jk) * e2u(ji,jj) * uslp(ji,jj,jk) * zmsku |
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| 251 | zcof2 = - pahv(ji,jj,jk) * e1v(ji,jj) * vslp(ji,jj,jk) * zmskv |
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| 252 | ! |
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| 253 | zftu(ji,jj,jk ) = ( zabe1 * zdit(ji,jj,jk) & |
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| 254 | & + zcof1 * ( zdkt (ji+1,jj) + zdk1t(ji,jj) & |
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| 255 | & + zdk1t(ji+1,jj) + zdkt (ji,jj) ) ) * umask(ji,jj,jk) |
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| 256 | zftv(ji,jj,jk) = ( zabe2 * zdjt(ji,jj,jk) & |
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| 257 | & + zcof2 * ( zdkt (ji,jj+1) + zdk1t(ji,jj) & |
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| 258 | & + zdk1t(ji,jj+1) + zdkt (ji,jj) ) ) * vmask(ji,jj,jk) |
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| 259 | END DO |
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| 260 | END DO |
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| 261 | ! |
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| 262 | DO jj = 2 , jpjm1 !== horizontal divergence and add to pta |
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| 263 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 264 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + zsign * ( zftu(ji,jj,jk) - zftu(ji-1,jj,jk) & |
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| 265 | & + zftv(ji,jj,jk) - zftv(ji,jj-1,jk) ) & |
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| 266 | & * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
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| 267 | END DO |
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| 268 | END DO |
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| 269 | END DO ! End of slab |
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| 270 | |
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| 271 | !!---------------------------------------------------------------------- |
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| 272 | !! III - vertical trend (full) |
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| 273 | !!---------------------------------------------------------------------- |
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| 274 | ! |
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| 275 | ztfw(1,:,:) = 0._wp ; ztfw(jpi,:,:) = 0._wp |
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| 276 | ! |
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| 277 | ! Vertical fluxes |
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| 278 | ! --------------- |
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| 279 | ! ! Surface and bottom vertical fluxes set to zero |
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| 280 | ztfw(:,:, 1 ) = 0._wp ; ztfw(:,:,jpk) = 0._wp |
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| 281 | |
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| 282 | DO jk = 2, jpkm1 ! interior (2=<jk=<jpk-1) |
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| 283 | DO jj = 2, jpjm1 |
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| 284 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 285 | ! |
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| 286 | zmsku = wmask(ji,jj,jk) / MAX( umask(ji ,jj,jk-1) + umask(ji-1,jj,jk) & |
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| 287 | & + umask(ji-1,jj,jk-1) + umask(ji ,jj,jk) , 1._wp ) |
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| 288 | zmskv = wmask(ji,jj,jk) / MAX( vmask(ji,jj ,jk-1) + vmask(ji,jj-1,jk) & |
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| 289 | & + vmask(ji,jj-1,jk-1) + vmask(ji,jj ,jk) , 1._wp ) |
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| 290 | ! |
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| 291 | zahu_w = ( pahu(ji ,jj,jk-1) + pahu(ji-1,jj,jk) & |
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| 292 | & + pahu(ji-1,jj,jk-1) + pahu(ji ,jj,jk) ) * zmsku |
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| 293 | zahv_w = ( pahv(ji,jj ,jk-1) + pahv(ji,jj-1,jk) & |
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| 294 | & + pahv(ji,jj-1,jk-1) + pahv(ji,jj ,jk) ) * zmskv |
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| 295 | ! |
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| 296 | zcoef3 = - zahu_w * e2t(ji,jj) * zmsku * wslpi (ji,jj,jk) !wslpi & j are already w-masked |
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| 297 | zcoef4 = - zahv_w * e1t(ji,jj) * zmskv * wslpj (ji,jj,jk) |
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| 298 | ! |
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| 299 | ztfw(ji,jj,jk) = zcoef3 * ( zdit(ji ,jj ,jk-1) + zdit(ji-1,jj ,jk) & |
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| 300 | & + zdit(ji-1,jj ,jk-1) + zdit(ji ,jj ,jk) ) & |
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| 301 | & + zcoef4 * ( zdjt(ji ,jj ,jk-1) + zdjt(ji ,jj-1,jk) & |
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| 302 | & + zdjt(ji ,jj-1,jk-1) + zdjt(ji ,jj ,jk) ) |
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| 303 | END DO |
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| 304 | END DO |
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| 305 | END DO |
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| 306 | ! !== add the vertical 33 flux ==! |
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| 307 | IF( ln_traldf_lap ) THEN ! laplacian case: eddy coef = ah_wslp2 - akz |
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| 308 | DO jk = 2, jpkm1 |
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| 309 | DO jj = 1, jpjm1 |
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| 310 | DO ji = fs_2, fs_jpim1 |
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| 311 | ztfw(ji,jj,jk) = ztfw(ji,jj,jk) + e1e2t(ji,jj) / e3w_n(ji,jj,jk) * wmask(ji,jj,jk) & |
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| 312 | & * ( ah_wslp2(ji,jj,jk) - akz(ji,jj,jk) ) & |
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| 313 | & * ( ptb(ji,jj,jk-1,jn) - ptb(ji,jj,jk,jn) ) |
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| 314 | END DO |
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| 315 | END DO |
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| 316 | END DO |
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| 317 | ! |
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| 318 | ELSE ! bilaplacian |
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| 319 | SELECT CASE( kpass ) |
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| 320 | CASE( 1 ) ! 1st pass : eddy coef = ah_wslp2 |
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| 321 | DO jk = 2, jpkm1 |
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| 322 | DO jj = 1, jpjm1 |
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| 323 | DO ji = fs_2, fs_jpim1 |
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| 324 | ztfw(ji,jj,jk) = ztfw(ji,jj,jk) & |
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| 325 | & + ah_wslp2(ji,jj,jk) * e1e2t(ji,jj) & |
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| 326 | & * ( ptb(ji,jj,jk-1,jn) - ptb(ji,jj,jk,jn) ) / e3w_n(ji,jj,jk) * wmask(ji,jj,jk) |
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| 327 | END DO |
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| 328 | END DO |
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| 329 | END DO |
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| 330 | CASE( 2 ) ! 2nd pass : eddy flux = ah_wslp2 and akz applied on ptb and ptbb gradients, resp. |
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| 331 | DO jk = 2, jpkm1 |
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| 332 | DO jj = 1, jpjm1 |
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| 333 | DO ji = fs_2, fs_jpim1 |
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| 334 | ztfw(ji,jj,jk) = ztfw(ji,jj,jk) + e1e2t(ji,jj) / e3w_n(ji,jj,jk) * wmask(ji,jj,jk) & |
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| 335 | & * ( ah_wslp2(ji,jj,jk) * ( ptb (ji,jj,jk-1,jn) - ptb (ji,jj,jk,jn) ) & |
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| 336 | & + akz (ji,jj,jk) * ( ptbb(ji,jj,jk-1,jn) - ptbb(ji,jj,jk,jn) ) ) |
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| 337 | END DO |
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| 338 | END DO |
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| 339 | END DO |
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| 340 | END SELECT |
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| 341 | ENDIF |
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| 342 | ! |
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| 343 | DO jk = 1, jpkm1 !== Divergence of vertical fluxes added to pta ==! |
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| 344 | DO jj = 2, jpjm1 |
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| 345 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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| 346 | pta(ji,jj,jk,jn) = pta(ji,jj,jk,jn) + zsign * ( ztfw (ji,jj,jk) - ztfw(ji,jj,jk+1) ) & |
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| 347 | & * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
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| 348 | END DO |
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| 349 | END DO |
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| 350 | END DO |
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| 351 | ! |
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| 352 | ! ! =============== |
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| 353 | END DO ! end tracer loop |
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| 354 | ! |
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| 355 | END SUBROUTINE tra_ldf_iso |
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| 356 | |
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| 357 | !!============================================================================== |
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| 358 | END MODULE traldf_iso |
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