[5777] | 1 | MODULE divhor |
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[3] | 2 | !!============================================================================== |
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[5777] | 3 | !! *** MODULE divhor *** |
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| 4 | !! Ocean diagnostic variable : now horizontal divergence |
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[3] | 5 | !!============================================================================== |
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[5777] | 6 | !! History : 1.0 ! 2002-09 (G. Madec, E. Durand) Free form, F90 |
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[2528] | 7 | !! - ! 2005-01 (J. Chanut) Unstructured open boundaries |
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| 8 | !! - ! 2003-08 (G. Madec) merged of cur and div, free form, F90 |
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| 9 | !! - ! 2005-01 (J. Chanut, A. Sellar) unstructured open boundaries |
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| 10 | !! 3.3 ! 2010-09 (D.Storkey and E.O'Dea) bug fixes for BDY module |
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| 11 | !! - ! 2010-10 (R. Furner, G. Madec) runoff and cla added directly here |
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[5777] | 12 | !! 3.7 ! 2014-01 (G. Madec) suppression of velocity curl from in-core memory |
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| 13 | !! - ! 2014-12 (G. Madec) suppression of cross land advection option |
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| 14 | !! - ! 2015-10 (G. Madec) add velocity and rnf flag in argument of div_hor |
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[2528] | 15 | !!---------------------------------------------------------------------- |
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[3] | 16 | |
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| 17 | !!---------------------------------------------------------------------- |
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[5777] | 18 | !! div_hor : Compute the horizontal divergence field |
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[3] | 19 | !!---------------------------------------------------------------------- |
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| 20 | USE oce ! ocean dynamics and tracers |
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| 21 | USE dom_oce ! ocean space and time domain |
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[6140] | 22 | USE sbc_oce, ONLY : ln_rnf, ln_isf ! surface boundary condition: ocean |
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[2528] | 23 | USE sbcrnf ! river runoff |
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[5777] | 24 | USE sbcisf ! ice shelf |
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[6140] | 25 | USE iscplhsb ! ice sheet / ocean coupling |
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| 26 | USE iscplini ! ice sheet / ocean coupling |
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[9023] | 27 | #if defined key_asminc |
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| 28 | USE asminc ! Assimilation increment |
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| 29 | #endif |
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[5777] | 30 | ! |
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[3] | 31 | USE in_out_manager ! I/O manager |
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| 32 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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[2715] | 33 | USE lib_mpp ! MPP library |
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[3294] | 34 | USE timing ! Timing |
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[3] | 35 | |
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| 36 | IMPLICIT NONE |
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| 37 | PRIVATE |
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| 38 | |
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[5777] | 39 | PUBLIC div_hor ! routine called by step.F90 and istate.F90 |
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[3] | 40 | |
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| 41 | !! * Substitutions |
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| 42 | # include "vectopt_loop_substitute.h90" |
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| 43 | !!---------------------------------------------------------------------- |
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[9598] | 44 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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[11715] | 45 | !! $Id$ |
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[10068] | 46 | !! Software governed by the CeCILL license (see ./LICENSE) |
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[3] | 47 | !!---------------------------------------------------------------------- |
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| 48 | CONTAINS |
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| 49 | |
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[5777] | 50 | SUBROUTINE div_hor( kt ) |
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[3] | 51 | !!---------------------------------------------------------------------- |
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[5777] | 52 | !! *** ROUTINE div_hor *** |
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[3] | 53 | !! |
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[5777] | 54 | !! ** Purpose : compute the horizontal divergence at now time-step |
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[3] | 55 | !! |
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[5777] | 56 | !! ** Method : the now divergence is computed as : |
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| 57 | !! hdivn = 1/(e1e2t*e3t) ( di[e2u*e3u un] + dj[e1v*e3v vn] ) |
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| 58 | !! and correct with runoff inflow (div_rnf) and cross land flow (div_cla) |
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[3] | 59 | !! |
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[5777] | 60 | !! ** Action : - update hdivn, the now horizontal divergence |
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[3] | 61 | !!---------------------------------------------------------------------- |
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[2715] | 62 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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[2528] | 63 | ! |
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[2715] | 64 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 65 | REAL(wp) :: zraur, zdep ! local scalars |
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[3] | 66 | !!---------------------------------------------------------------------- |
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[3294] | 67 | ! |
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[9019] | 68 | IF( ln_timing ) CALL timing_start('div_hor') |
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[3294] | 69 | ! |
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[3] | 70 | IF( kt == nit000 ) THEN |
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| 71 | IF(lwp) WRITE(numout,*) |
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[5777] | 72 | IF(lwp) WRITE(numout,*) 'div_hor : horizontal velocity divergence ' |
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| 73 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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[3] | 74 | ENDIF |
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[5777] | 75 | ! |
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| 76 | DO jk = 1, jpkm1 !== Horizontal divergence ==! |
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[3] | 77 | DO jj = 2, jpjm1 |
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| 78 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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[9019] | 79 | hdivn(ji,jj,jk) = ( e2u(ji ,jj) * e3u_n(ji ,jj,jk) * un(ji ,jj,jk) & |
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| 80 | & - e2u(ji-1,jj) * e3u_n(ji-1,jj,jk) * un(ji-1,jj,jk) & |
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| 81 | & + e1v(ji,jj ) * e3v_n(ji,jj ,jk) * vn(ji,jj ,jk) & |
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| 82 | & - e1v(ji,jj-1) * e3v_n(ji,jj-1,jk) * vn(ji,jj-1,jk) ) & |
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| 83 | & * r1_e1e2t(ji,jj) / e3t_n(ji,jj,jk) |
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[3] | 84 | END DO |
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| 85 | END DO |
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[5777] | 86 | END DO |
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[9019] | 87 | #if defined key_agrif |
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| 88 | IF( .NOT. Agrif_Root() ) THEN |
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[9116] | 89 | IF( nbondi == -1 .OR. nbondi == 2 ) hdivn( 2 , : ,:) = 0._wp ! west |
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| 90 | IF( nbondi == 1 .OR. nbondi == 2 ) hdivn( nlci-1, : ,:) = 0._wp ! east |
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| 91 | IF( nbondj == -1 .OR. nbondj == 2 ) hdivn( : , 2 ,:) = 0._wp ! south |
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| 92 | IF( nbondj == 1 .OR. nbondj == 2 ) hdivn( : ,nlcj-1,:) = 0._wp ! north |
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[9019] | 93 | ENDIF |
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| 94 | #endif |
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[2715] | 95 | ! |
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[9019] | 96 | IF( ln_rnf ) CALL sbc_rnf_div( hdivn ) !== runoffs ==! (update hdivn field) |
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[2528] | 97 | ! |
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[9023] | 98 | #if defined key_asminc |
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| 99 | IF( ln_sshinc .AND. ln_asmiau ) CALL ssh_asm_div( kt, hdivn ) !== SSH assimilation ==! (update hdivn field) |
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| 100 | ! |
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| 101 | #endif |
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| 102 | IF( ln_isf ) CALL sbc_isf_div( hdivn ) !== ice shelf ==! (update hdivn field) |
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[3294] | 103 | ! |
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[9019] | 104 | IF( ln_iscpl .AND. ln_hsb ) CALL iscpl_div( hdivn ) !== ice sheet ==! (update hdivn field) |
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[5777] | 105 | ! |
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[10425] | 106 | CALL lbc_lnk( 'divhor', hdivn, 'T', 1. ) ! (no sign change) |
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[6140] | 107 | ! |
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[9019] | 108 | IF( ln_timing ) CALL timing_stop('div_hor') |
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[5777] | 109 | ! |
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| 110 | END SUBROUTINE div_hor |
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[3] | 111 | |
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| 112 | !!====================================================================== |
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[5777] | 113 | END MODULE divhor |
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