source: NEMO/trunk/src/OCE/DYN/divhor.F90 @ 12377

Last change on this file since 12377 was 12377, checked in by acc, 7 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: 5.2 KB
Line 
1MODULE divhor
2   !!==============================================================================
3   !!                       ***  MODULE  divhor  ***
4   !! Ocean diagnostic variable : now horizontal divergence
5   !!==============================================================================
6   !! History :  1.0  ! 2002-09  (G. Madec, E. Durand)  Free form, F90
7   !!             -   ! 2005-01  (J. Chanut) Unstructured open boundaries
8   !!             -   ! 2003-08  (G. Madec)  merged of cur and div, free form, F90
9   !!             -   ! 2005-01  (J. Chanut, A. Sellar) unstructured open boundaries
10   !!            3.3  ! 2010-09  (D.Storkey and E.O'Dea) bug fixes for BDY module
11   !!             -   ! 2010-10  (R. Furner, G. Madec) runoff and cla added directly here
12   !!            3.7  ! 2014-01  (G. Madec) suppression of velocity curl from in-core memory
13   !!             -   ! 2014-12  (G. Madec) suppression of cross land advection option
14   !!             -   ! 2015-10  (G. Madec) add velocity and rnf flag in argument of div_hor
15   !!----------------------------------------------------------------------
16
17   !!----------------------------------------------------------------------
18   !!   div_hor    : Compute the horizontal divergence field
19   !!----------------------------------------------------------------------
20   USE oce             ! ocean dynamics and tracers
21   USE dom_oce         ! ocean space and time domain
22   USE sbc_oce, ONLY : ln_rnf      ! river runoff
23   USE sbcrnf , ONLY : sbc_rnf_div ! river runoff
24   USE isf_oce, ONLY : ln_isf      ! ice shelf
25   USE isfhdiv, ONLY : isf_hdiv    ! ice shelf
26#if defined key_asminc   
27   USE asminc          ! Assimilation increment
28#endif
29   !
30   USE in_out_manager  ! I/O manager
31   USE lbclnk          ! ocean lateral boundary conditions (or mpp link)
32   USE lib_mpp         ! MPP library
33   USE timing          ! Timing
34
35   IMPLICIT NONE
36   PRIVATE
37
38   PUBLIC   div_hor    ! routine called by step.F90 and istate.F90
39
40   !! * Substitutions
41#  include "do_loop_substitute.h90"
42   !!----------------------------------------------------------------------
43   !! NEMO/OCE 4.0 , NEMO Consortium (2018)
44   !! $Id$
45   !! Software governed by the CeCILL license (see ./LICENSE)
46   !!----------------------------------------------------------------------
47CONTAINS
48
49   SUBROUTINE div_hor( kt, Kbb, Kmm )
50      !!----------------------------------------------------------------------
51      !!                  ***  ROUTINE div_hor  ***
52      !!                   
53      !! ** Purpose :   compute the horizontal divergence at now time-step
54      !!
55      !! ** Method  :   the now divergence is computed as :
56      !!         hdiv = 1/(e1e2t*e3t) ( di[e2u*e3u un] + dj[e1v*e3v vn] )
57      !!      and correct with runoff inflow (div_rnf) and cross land flow (div_cla)
58      !!
59      !! ** Action  : - update hdiv, the now horizontal divergence
60      !!----------------------------------------------------------------------
61      INTEGER, INTENT(in) ::   kt        ! ocean time-step index
62      INTEGER, INTENT(in) ::   Kbb, Kmm  ! ocean time level indices
63      !
64      INTEGER  ::   ji, jj, jk    ! dummy loop indices
65      REAL(wp) ::   zraur, zdep   ! local scalars
66      REAL(wp), DIMENSION(jpi,jpj) :: ztmp
67      !!----------------------------------------------------------------------
68      !
69      IF( ln_timing )   CALL timing_start('div_hor')
70      !
71      IF( kt == nit000 ) THEN
72         IF(lwp) WRITE(numout,*)
73         IF(lwp) WRITE(numout,*) 'div_hor : horizontal velocity divergence '
74         IF(lwp) WRITE(numout,*) '~~~~~~~   '
75         hdiv(:,:,:) = 0._wp    ! initialize hdiv for the halos at the first time step
76      ENDIF
77      !
78      DO_3D_00_00( 1, jpkm1 )
79         hdiv(ji,jj,jk) = (  e2u(ji  ,jj) * e3u(ji  ,jj,jk,Kmm) * uu(ji  ,jj,jk,Kmm)      &
80            &               - e2u(ji-1,jj) * e3u(ji-1,jj,jk,Kmm) * uu(ji-1,jj,jk,Kmm)      &
81            &               + e1v(ji,jj  ) * e3v(ji,jj  ,jk,Kmm) * vv(ji,jj  ,jk,Kmm)      &
82            &               - e1v(ji,jj-1) * e3v(ji,jj-1,jk,Kmm) * vv(ji,jj-1,jk,Kmm)  )   &
83            &            * r1_e1e2t(ji,jj) / e3t(ji,jj,jk,Kmm)
84      END_3D
85      !
86#if defined key_agrif
87      IF( .NOT. Agrif_Root() ) THEN
88         IF( nbondi == -1 .OR. nbondi == 2 )   hdiv(   2   ,  :   ,:) = 0._wp      ! west
89         IF( nbondi ==  1 .OR. nbondi == 2 )   hdiv( nlci-1,  :   ,:) = 0._wp      ! east
90         IF( nbondj == -1 .OR. nbondj == 2 )   hdiv(   :   ,  2   ,:) = 0._wp      ! south
91         IF( nbondj ==  1 .OR. nbondj == 2 )   hdiv(   :   ,nlcj-1,:) = 0._wp      ! north
92      ENDIF
93#endif
94      !
95      IF( ln_rnf )   CALL sbc_rnf_div( hdiv, Kmm )                     !==  runoffs    ==!   (update hdiv field)
96      !
97#if defined key_asminc 
98      IF( ln_sshinc .AND. ln_asmiau )   CALL ssh_asm_div( kt, Kbb, Kmm, hdiv )   !==  SSH assimilation  ==!   (update hdiv field)
99      !
100#endif
101      !
102      IF( ln_isf )                      CALL isf_hdiv( kt, Kmm, hdiv )           !==  ice shelf         ==!   (update hdiv field)
103      !
104      CALL lbc_lnk( 'divhor', hdiv, 'T', 1. )   !   (no sign change)
105      !
106      IF( ln_timing )   CALL timing_stop('div_hor')
107      !
108   END SUBROUTINE div_hor
109   
110   !!======================================================================
111END MODULE divhor
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