source: NEMO/trunk/src/OCE/ZDF/zdfevd.F90 @ 12702

Last change on this file since 12702 was 12377, checked in by acc, 13 months ago

The big one. Merging all 2019 developments from the option 1 branch back onto the trunk.

This changeset reproduces 2019/dev_r11943_MERGE_2019 on the trunk using a 2-URL merge
onto a working copy of the trunk. I.e.:

svn merge —ignore-ancestry \

svn+ssh://acc@forge.ipsl.jussieu.fr/ipsl/forge/projets/nemo/svn/NEMO/trunk \
svn+ssh://acc@forge.ipsl.jussieu.fr/ipsl/forge/projets/nemo/svn/NEMO/branches/2019/dev_r11943_MERGE_2019 ./

The —ignore-ancestry flag avoids problems that may otherwise arise from the fact that
the merge history been trunk and branch may have been applied in a different order but
care has been taken before this step to ensure that all applicable fixes and updates
are present in the merge branch.

The trunk state just before this step has been branched to releases/release-4.0-HEAD
and that branch has been immediately tagged as releases/release-4.0.2. Any fixes
or additions in response to tickets on 4.0, 4.0.1 or 4.0.2 should be done on
releases/release-4.0-HEAD. From now on future 'point' releases (e.g. 4.0.2) will
remain unchanged with periodic releases as needs demand. Note release-4.0-HEAD is a
transitional naming convention. Future full releases, say 4.2, will have a release-4.2
branch which fulfills this role and the first point release (e.g. 4.2.0) will be made
immediately following the release branch creation.

2020 developments can be started from any trunk revision later than this one.

  • Property svn:keywords set to Id
File size: 5.5 KB
Line 
1MODULE zdfevd
2   !!======================================================================
3   !!                       ***  MODULE  zdfevd  ***
4   !! Ocean physics: parameterization of convection through an enhancement
5   !!                of vertical eddy mixing coefficient
6   !!======================================================================
7   !! History :  OPA  !  1997-06  (G. Madec, A. Lazar)  Original code
8   !!   NEMO     1.0  !  2002-06  (G. Madec)  F90: Free form and module
9   !!            3.2  !  2009-03  (M. Leclair, G. Madec, R. Benshila) test on both before & after
10   !!            4.0  !  2017-04  (G. Madec)  evd applied on avm (at t-point)
11   !!----------------------------------------------------------------------
12
13   !!----------------------------------------------------------------------
14   !!   zdf_evd       : increase the momentum and tracer Kz at the location of
15   !!                   statically unstable portion of the water column (ln_zdfevd=T)
16   !!----------------------------------------------------------------------
17   USE oce             ! ocean dynamics and tracers variables
18   USE dom_oce         ! ocean space and time domain variables
19   USE zdf_oce         ! ocean vertical physics variables
20   USE trd_oce         ! trends: ocean variables
21   USE trdtra          ! trends manager: tracers
22   !
23   USE in_out_manager  ! I/O manager
24   USE iom             ! for iom_put
25   USE lbclnk          ! ocean lateral boundary conditions (or mpp link)
26   USE timing          ! Timing
27
28   IMPLICIT NONE
29   PRIVATE
30
31   PUBLIC   zdf_evd    ! called by step.F90
32
33   !! * Substitutions
34#  include "do_loop_substitute.h90"
35   !!----------------------------------------------------------------------
36   !! NEMO/OCE 4.0 , NEMO Consortium (2018)
37   !! $Id$
38   !! Software governed by the CeCILL license (see ./LICENSE)
39   !!----------------------------------------------------------------------
40CONTAINS
41
42   SUBROUTINE zdf_evd( kt, Kmm, Krhs, p_avm, p_avt )
43      !!----------------------------------------------------------------------
44      !!                  ***  ROUTINE zdf_evd  ***
45      !!                   
46      !! ** Purpose :   Local increased the vertical eddy viscosity and diffu-
47      !!      sivity coefficients when a static instability is encountered.
48      !!
49      !! ** Method  :   tracer (and momentum if nn_evdm=1) vertical mixing
50      !!              coefficients are set to rn_evd (namelist parameter)
51      !!              if the water column is statically unstable.
52      !!                The test of static instability is performed using
53      !!              Brunt-Vaisala frequency (rn2 < -1.e-12) of to successive
54      !!              time-step (Leap-Frog environnement): before and
55      !!              now time-step.
56      !!
57      !! ** Action  :   avt, avm   enhanced where static instability occurs
58      !!----------------------------------------------------------------------
59      INTEGER                    , INTENT(in   ) ::   kt             ! ocean time-step indexocean time step
60      INTEGER                    , INTENT(in   ) ::   Kmm, Krhs      ! time level indices
61      REAL(wp), DIMENSION(:,:,:) , INTENT(inout) ::   p_avm, p_avt   !  momentum and tracer Kz (w-points)
62      !
63      INTEGER ::   ji, jj, jk   ! dummy loop indices
64      REAL(wp), DIMENSION(jpi,jpj,jpk) ::   zavt_evd, zavm_evd
65      !!----------------------------------------------------------------------
66      !
67      IF( kt == nit000 ) THEN
68         IF(lwp) WRITE(numout,*)
69         IF(lwp) WRITE(numout,*) 'zdf_evd : Enhanced Vertical Diffusion (evd)'
70         IF(lwp) WRITE(numout,*) '~~~~~~~ '
71         IF(lwp) WRITE(numout,*)
72      ENDIF
73      !
74      !
75      zavt_evd(:,:,:) = p_avt(:,:,:)         ! set avt prior to evd application
76      !
77      SELECT CASE ( nn_evdm )
78      !
79      CASE ( 1 )           !==  enhance tracer & momentum Kz  ==!   (if rn2<-1.e-12)
80         !
81         zavm_evd(:,:,:) = p_avm(:,:,:)      ! set avm prior to evd application
82         !
83!! change last digits results
84!         WHERE( MAX( rn2(2:jpi,2:jpj,2:jpkm1), rn2b(2:jpi,2:jpj,2:jpkm1) )  <= -1.e-12 ) THEN
85!            p_avt(2:jpi,2:jpj,2:jpkm1) = rn_evd * wmask(2:jpi,2:jpj,2:jpkm1)
86!            p_avm(2:jpi,2:jpj,2:jpkm1) = rn_evd * wmask(2:jpi,2:jpj,2:jpkm1)
87!         END WHERE
88         !
89         DO_3D_00_00( 1, jpkm1 )
90            IF(  MIN( rn2(ji,jj,jk), rn2b(ji,jj,jk) ) <= -1.e-12 ) THEN
91               p_avt(ji,jj,jk) = rn_evd * wmask(ji,jj,jk)
92               p_avm(ji,jj,jk) = rn_evd * wmask(ji,jj,jk)
93            ENDIF
94         END_3D
95         !
96         zavm_evd(:,:,:) = p_avm(:,:,:) - zavm_evd(:,:,:)   ! change in avm due to evd
97         CALL iom_put( "avm_evd", zavm_evd )                ! output this change
98         !
99      CASE DEFAULT         !==  enhance tracer Kz  ==!   (if rn2<-1.e-12)
100!! change last digits results
101!         WHERE( MAX( rn2(2:jpi,2:jpj,2:jpkm1), rn2b(2:jpi,2:jpj,2:jpkm1) )  <= -1.e-12 )
102!            p_avt(2:jpi,2:jpj,2:jpkm1) = rn_evd * wmask(2:jpi,2:jpj,2:jpkm1)
103!         END WHERE
104
105         DO_3D_00_00( 1, jpkm1 )
106            IF(  MIN( rn2(ji,jj,jk), rn2b(ji,jj,jk) ) <= -1.e-12 )   &
107               p_avt(ji,jj,jk) = rn_evd * wmask(ji,jj,jk)
108         END_3D
109         !
110      END SELECT 
111      !
112      zavt_evd(:,:,:) = p_avt(:,:,:) - zavt_evd(:,:,:)   ! change in avt due to evd
113      CALL iom_put( "avt_evd", zavt_evd )              ! output this change
114      IF( l_trdtra ) CALL trd_tra( kt, Kmm, Krhs, 'TRA', jp_tem, jptra_evd, zavt_evd )
115      !
116   END SUBROUTINE zdf_evd
117
118   !!======================================================================
119END MODULE zdfevd
Note: See TracBrowser for help on using the repository browser.