| 1 | MODULE dynbfr |
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| 2 | !!============================================================================== |
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| 3 | !! *** MODULE dynbfr *** |
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| 4 | !! Ocean dynamics : bottom friction component of the momentum mixing trend |
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| 5 | !!============================================================================== |
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| 6 | !! History : 3.2 ! 2008-11 (A. C. Coward) Original code |
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| 7 | !!---------------------------------------------------------------------- |
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| 8 | |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | !! dyn_bfr : Update the momentum trend with the bottom friction contribution |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | USE oce ! ocean dynamics and tracers variables |
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| 13 | USE dom_oce ! ocean space and time domain variables |
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| 14 | USE zdf_oce ! ocean vertical physics variables |
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| 15 | USE trdmod ! ocean active dynamics and tracers trends |
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| 16 | USE trdmod_oce ! ocean variables trends |
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| 17 | USE in_out_manager ! I/O manager |
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| 18 | USE prtctl ! Print control |
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| 19 | |
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| 20 | IMPLICIT NONE |
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| 21 | PRIVATE |
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| 22 | |
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| 23 | PUBLIC dyn_bfr ! routine called by step.F90 |
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| 24 | |
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| 25 | !! * Control permutation of array indices |
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| 26 | # include "oce_ftrans.h90" |
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| 27 | # include "dom_oce_ftrans.h90" |
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| 28 | # include "zdf_oce_ftrans.h90" |
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| 29 | |
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| 30 | !! * Substitutions |
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| 31 | # include "domzgr_substitute.h90" |
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| 32 | # include "zdfddm_substitute.h90" |
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| 33 | # include "vectopt_loop_substitute.h90" |
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| 34 | !!---------------------------------------------------------------------- |
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| 35 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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| 36 | !! $Id$ |
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| 37 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 38 | !!---------------------------------------------------------------------- |
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| 39 | CONTAINS |
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| 40 | |
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| 41 | SUBROUTINE dyn_bfr( kt ) |
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| 42 | !!---------------------------------------------------------------------- |
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| 43 | !! *** ROUTINE dyn_bfr *** |
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| 44 | !! |
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| 45 | !! ** Purpose : compute the bottom friction ocean dynamics physics. |
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| 46 | !! |
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| 47 | !! ** Action : (ua,va) momentum trend increased by bottom friction trend |
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| 48 | !!--------------------------------------------------------------------- |
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| 49 | USE oce, ONLY: ztrduv => tsa ! tsa used as 4D workspace |
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| 50 | !! DCSE_NEMO: module variable renamed, need additional directives |
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| 51 | !FTRANS ztrduv :I :I :z :I |
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| 52 | |
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| 53 | !! |
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| 54 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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| 55 | !! |
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| 56 | INTEGER :: ji, jj ! dummy loop indexes |
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| 57 | INTEGER :: ikbu, ikbv ! local integers |
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| 58 | REAL(wp) :: zm1_2dt ! local scalar |
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| 59 | !!--------------------------------------------------------------------- |
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| 60 | ! |
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| 61 | zm1_2dt = - 1._wp / ( 2._wp * rdt ) |
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| 62 | |
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| 63 | IF( l_trddyn ) THEN ! temporary save of ua and va trends |
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| 64 | ztrduv(:,:,:,1) = ua(:,:,:) |
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| 65 | ztrduv(:,:,:,2) = va(:,:,:) |
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| 66 | ENDIF |
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| 67 | |
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| 68 | # if defined key_vectopt_loop |
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| 69 | DO jj = 1, 1 |
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| 70 | DO ji = jpi+2, jpij-jpi-1 ! vector opt. (forced unrolling) |
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| 71 | # else |
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| 72 | DO jj = 2, jpjm1 |
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| 73 | DO ji = 2, jpim1 |
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| 74 | # endif |
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| 75 | ikbu = mbku(ji,jj) ! deepest ocean u- & v-levels |
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| 76 | ikbv = mbkv(ji,jj) |
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| 77 | ! |
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| 78 | ! Apply stability criteria on absolute value : abs(bfr/e3) < 1/(2dt) => bfr/e3 > -1/(2dt) |
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| 79 | ua(ji,jj,ikbu) = ua(ji,jj,ikbu) + MAX( bfrua(ji,jj) / fse3u(ji,jj,ikbu) , zm1_2dt ) * ub(ji,jj,ikbu) |
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| 80 | va(ji,jj,ikbv) = va(ji,jj,ikbv) + MAX( bfrva(ji,jj) / fse3v(ji,jj,ikbv) , zm1_2dt ) * vb(ji,jj,ikbv) |
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| 81 | END DO |
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| 82 | END DO |
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| 83 | |
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| 84 | ! |
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| 85 | IF( l_trddyn ) THEN ! save the vertical diffusive trends for further diagnostics |
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| 86 | ztrduv(:,:,:,1) = ua(:,:,:) - ztrduv(:,:,:,1) |
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| 87 | ztrduv(:,:,:,2) = va(:,:,:) - ztrduv(:,:,:,2) |
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| 88 | CALL trd_mod( ztrduv(:,:,:,1), ztrduv(:,:,:,2), jpdyn_trd_bfr, 'DYN', kt ) |
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| 89 | ENDIF |
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| 90 | ! ! print mean trends (used for debugging) |
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| 91 | IF(ln_ctl) CALL prt_ctl( tab3d_1=ua, clinfo1=' bfr - Ua: ', mask1=umask, & |
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| 92 | & tab3d_2=va, clinfo2= ' Va: ', mask2=vmask, clinfo3='dyn' ) |
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| 93 | ! |
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| 94 | END SUBROUTINE dyn_bfr |
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| 95 | |
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| 96 | !!============================================================================== |
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| 97 | END MODULE dynbfr |
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