| 1 | MODULE 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, ln_isf ! surface boundary condition: ocean |
|---|
| 23 | USE sbcrnf ! river runoff |
|---|
| 24 | USE sbcisf ! ice shelf |
|---|
| 25 | USE iscplhsb ! ice sheet / ocean coupling |
|---|
| 26 | USE iscplini ! ice sheet / ocean coupling |
|---|
| 27 | #if defined key_asminc |
|---|
| 28 | USE asminc ! Assimilation increment |
|---|
| 29 | #endif |
|---|
| 30 | ! |
|---|
| 31 | USE in_out_manager ! I/O manager |
|---|
| 32 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
|---|
| 33 | USE lib_mpp ! MPP library |
|---|
| 34 | USE wrk_nemo ! Memory Allocation |
|---|
| 35 | USE timing ! Timing |
|---|
| 36 | |
|---|
| 37 | IMPLICIT NONE |
|---|
| 38 | PRIVATE |
|---|
| 39 | |
|---|
| 40 | PUBLIC div_hor ! routine called by step.F90 and istate.F90 |
|---|
| 41 | |
|---|
| 42 | !! * Substitutions |
|---|
| 43 | # include "vectopt_loop_substitute.h90" |
|---|
| 44 | !!---------------------------------------------------------------------- |
|---|
| 45 | !! NEMO/OPA 3.7 , NEMO Consortium (2014) |
|---|
| 46 | !! $Id$ |
|---|
| 47 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
|---|
| 48 | !!---------------------------------------------------------------------- |
|---|
| 49 | CONTAINS |
|---|
| 50 | |
|---|
| 51 | SUBROUTINE div_hor( kt ) |
|---|
| 52 | !!---------------------------------------------------------------------- |
|---|
| 53 | !! *** ROUTINE div_hor *** |
|---|
| 54 | !! |
|---|
| 55 | !! ** Purpose : compute the horizontal divergence at now time-step |
|---|
| 56 | !! |
|---|
| 57 | !! ** Method : the now divergence is computed as : |
|---|
| 58 | !! hdivn = 1/(e1e2t*e3t) ( di[e2u*e3u un] + dj[e1v*e3v vn] ) |
|---|
| 59 | !! and correct with runoff inflow (div_rnf) and cross land flow (div_cla) |
|---|
| 60 | !! |
|---|
| 61 | !! ** Action : - update hdivn, the now horizontal divergence |
|---|
| 62 | !!---------------------------------------------------------------------- |
|---|
| 63 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
|---|
| 64 | ! |
|---|
| 65 | INTEGER :: ji, jj, jk ! dummy loop indices |
|---|
| 66 | REAL(wp) :: zraur, zdep ! local scalars |
|---|
| 67 | !!---------------------------------------------------------------------- |
|---|
| 68 | ! |
|---|
| 69 | IF( nn_timing == 1 ) 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 | ENDIF |
|---|
| 76 | ! |
|---|
| 77 | DO jk = 1, jpkm1 !== Horizontal divergence ==! |
|---|
| 78 | DO jj = 2, jpjm1 |
|---|
| 79 | DO ji = fs_2, fs_jpim1 ! vector opt. |
|---|
| 80 | hdivn(ji,jj,jk) = ( e2u(ji ,jj) * e3u_n(ji ,jj,jk) * un(ji ,jj,jk) & |
|---|
| 81 | & - e2u(ji-1,jj) * e3u_n(ji-1,jj,jk) * un(ji-1,jj,jk) & |
|---|
| 82 | & + e1v(ji,jj ) * e3v_n(ji,jj ,jk) * vn(ji,jj ,jk) & |
|---|
| 83 | & - e1v(ji,jj-1) * e3v_n(ji,jj-1,jk) * vn(ji,jj-1,jk) ) & |
|---|
| 84 | & / ( e1e2t(ji,jj) * e3t_n(ji,jj,jk) ) |
|---|
| 85 | END DO |
|---|
| 86 | END DO |
|---|
| 87 | IF( .NOT. AGRIF_Root() ) THEN |
|---|
| 88 | IF( nbondi == 1 .OR. nbondi == 2 ) hdivn(nlci-1, : ,jk) = 0._wp ! east |
|---|
| 89 | IF( nbondi == -1 .OR. nbondi == 2 ) hdivn( 2 , : ,jk) = 0._wp ! west |
|---|
| 90 | IF( nbondj == 1 .OR. nbondj == 2 ) hdivn( : ,nlcj-1,jk) = 0._wp ! north |
|---|
| 91 | IF( nbondj == -1 .OR. nbondj == 2 ) hdivn( : , 2 ,jk) = 0._wp ! south |
|---|
| 92 | ENDIF |
|---|
| 93 | END DO |
|---|
| 94 | ! |
|---|
| 95 | IF( ln_rnf ) CALL sbc_rnf_div( hdivn ) !== runoffs ==! (update hdivn field) |
|---|
| 96 | ! |
|---|
| 97 | #if defined key_asminc |
|---|
| 98 | IF( ln_sshinc .AND. ln_asmiau ) CALL ssh_asm_div( kt, hdivn ) !== SSH assimilation ==! (update hdivn field) |
|---|
| 99 | ! |
|---|
| 100 | #endif |
|---|
| 101 | IF( ln_isf ) CALL sbc_isf_div( hdivn ) !== ice shelf ==! (update hdivn field) |
|---|
| 102 | ! |
|---|
| 103 | IF( ln_iscpl .AND. ln_hsb ) CALL iscpl_div( hdivn ) !== ice sheet ==! (update hdivn field) |
|---|
| 104 | ! |
|---|
| 105 | CALL lbc_lnk( hdivn, 'T', 1. ) !== lateral boundary cond. ==! (no sign change) |
|---|
| 106 | ! |
|---|
| 107 | IF( nn_timing == 1 ) CALL timing_stop('div_hor') |
|---|
| 108 | ! |
|---|
| 109 | END SUBROUTINE div_hor |
|---|
| 110 | |
|---|
| 111 | !!====================================================================== |
|---|
| 112 | END MODULE divhor |
|---|
