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divhor.F90 in NEMO/trunk/src/OCE/DYN – NEMO

source: NEMO/trunk/src/OCE/DYN/divhor.F90 @ 12965

Last change on this file since 12965 was 12965, checked in by jchanut, 4 years ago

Further nbondi/nbondj removal with AGRIF - results unchanged - forgotten in task #2199

  • Property svn:keywords set to Id
File size: 4.8 KB
RevLine 
[5777]1MODULE divhor
[3]2   !!==============================================================================
[5777]3   !!                       ***  MODULE  divhor  ***
4   !! Ocean diagnostic variable : now horizontal divergence
[3]5   !!==============================================================================
[5777]6   !! History :  1.0  ! 2002-09  (G. Madec, E. Durand)  Free form, F90
[2528]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
[5777]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
[2528]15   !!----------------------------------------------------------------------
[3]16
17   !!----------------------------------------------------------------------
[5777]18   !!   div_hor    : Compute the horizontal divergence field
[3]19   !!----------------------------------------------------------------------
20   USE oce             ! ocean dynamics and tracers
21   USE dom_oce         ! ocean space and time domain
[12377]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
[9023]26#if defined key_asminc   
27   USE asminc          ! Assimilation increment
28#endif
[5777]29   !
[3]30   USE in_out_manager  ! I/O manager
31   USE lbclnk          ! ocean lateral boundary conditions (or mpp link)
[2715]32   USE lib_mpp         ! MPP library
[3294]33   USE timing          ! Timing
[3]34
35   IMPLICIT NONE
36   PRIVATE
37
[5777]38   PUBLIC   div_hor    ! routine called by step.F90 and istate.F90
[3]39
40   !! * Substitutions
[12377]41#  include "do_loop_substitute.h90"
[3]42   !!----------------------------------------------------------------------
[9598]43   !! NEMO/OCE 4.0 , NEMO Consortium (2018)
[1152]44   !! $Id$
[10068]45   !! Software governed by the CeCILL license (see ./LICENSE)
[3]46   !!----------------------------------------------------------------------
47CONTAINS
48
[12377]49   SUBROUTINE div_hor( kt, Kbb, Kmm )
[3]50      !!----------------------------------------------------------------------
[5777]51      !!                  ***  ROUTINE div_hor  ***
[3]52      !!                   
[5777]53      !! ** Purpose :   compute the horizontal divergence at now time-step
[3]54      !!
[5777]55      !! ** Method  :   the now divergence is computed as :
[12377]56      !!         hdiv = 1/(e1e2t*e3t) ( di[e2u*e3u un] + dj[e1v*e3v vn] )
[5777]57      !!      and correct with runoff inflow (div_rnf) and cross land flow (div_cla)
[3]58      !!
[12377]59      !! ** Action  : - update hdiv, the now horizontal divergence
[3]60      !!----------------------------------------------------------------------
[12377]61      INTEGER, INTENT(in) ::   kt        ! ocean time-step index
62      INTEGER, INTENT(in) ::   Kbb, Kmm  ! ocean time level indices
[2528]63      !
[2715]64      INTEGER  ::   ji, jj, jk    ! dummy loop indices
65      REAL(wp) ::   zraur, zdep   ! local scalars
[12377]66      REAL(wp), DIMENSION(jpi,jpj) :: ztmp
[3]67      !!----------------------------------------------------------------------
[3294]68      !
[9019]69      IF( ln_timing )   CALL timing_start('div_hor')
[3294]70      !
[3]71      IF( kt == nit000 ) THEN
72         IF(lwp) WRITE(numout,*)
[5777]73         IF(lwp) WRITE(numout,*) 'div_hor : horizontal velocity divergence '
74         IF(lwp) WRITE(numout,*) '~~~~~~~   '
[12377]75         hdiv(:,:,:) = 0._wp    ! initialize hdiv for the halos at the first time step
[3]76      ENDIF
[5777]77      !
[12377]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( ln_rnf )   CALL sbc_rnf_div( hdiv, Kmm )                     !==  runoffs    ==!   (update hdiv field)
[2528]87      !
[9023]88#if defined key_asminc 
[12377]89      IF( ln_sshinc .AND. ln_asmiau )   CALL ssh_asm_div( kt, Kbb, Kmm, hdiv )   !==  SSH assimilation  ==!   (update hdiv field)
[9023]90      !
91#endif
[3294]92      !
[12377]93      IF( ln_isf )                      CALL isf_hdiv( kt, Kmm, hdiv )           !==  ice shelf         ==!   (update hdiv field)
[5777]94      !
[12377]95      CALL lbc_lnk( 'divhor', hdiv, 'T', 1. )   !   (no sign change)
[6140]96      !
[9019]97      IF( ln_timing )   CALL timing_stop('div_hor')
[5777]98      !
99   END SUBROUTINE div_hor
[3]100   
101   !!======================================================================
[5777]102END MODULE divhor
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