[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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[12377] | 22 | USE sbc_oce, ONLY : ln_rnf ! river runoff |
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| 23 | USE sbcrnf , ONLY : sbc_rnf_div ! river runoff |
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| 24 | USE isf_oce, ONLY : ln_isf ! ice shelf |
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| 25 | USE isfhdiv, ONLY : isf_hdiv ! ice shelf |
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[9023] | 26 | #if defined key_asminc |
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| 27 | USE asminc ! Assimilation increment |
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| 28 | #endif |
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[5777] | 29 | ! |
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[3] | 30 | USE in_out_manager ! I/O manager |
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| 31 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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[2715] | 32 | USE lib_mpp ! MPP library |
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[3294] | 33 | USE timing ! Timing |
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[3] | 34 | |
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| 35 | IMPLICIT NONE |
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| 36 | PRIVATE |
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| 37 | |
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[5777] | 38 | PUBLIC div_hor ! routine called by step.F90 and istate.F90 |
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[3] | 39 | |
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| 40 | !! * Substitutions |
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[12377] | 41 | # include "do_loop_substitute.h90" |
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[13237] | 42 | # include "domzgr_substitute.h90" |
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[3] | 43 | !!---------------------------------------------------------------------- |
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[9598] | 44 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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[1152] | 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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[12377] | 50 | SUBROUTINE div_hor( kt, Kbb, Kmm ) |
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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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[12377] | 57 | !! hdiv = 1/(e1e2t*e3t) ( di[e2u*e3u un] + dj[e1v*e3v vn] ) |
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[5777] | 58 | !! and correct with runoff inflow (div_rnf) and cross land flow (div_cla) |
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[3] | 59 | !! |
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[12377] | 60 | !! ** Action : - update hdiv, the now horizontal divergence |
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[3] | 61 | !!---------------------------------------------------------------------- |
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[12377] | 62 | INTEGER, INTENT(in) :: kt ! ocean time-step index |
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| 63 | INTEGER, INTENT(in) :: Kbb, Kmm ! ocean time level indices |
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[2528] | 64 | ! |
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[2715] | 65 | INTEGER :: ji, jj, jk ! dummy loop indices |
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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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[14834] | 71 | IF( .NOT. l_istiled .OR. ntile == 1 ) THEN ! Do only on the first tile |
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| 72 | IF(lwp) WRITE(numout,*) |
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| 73 | IF(lwp) WRITE(numout,*) 'div_hor : horizontal velocity divergence ' |
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| 74 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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| 75 | ENDIF |
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| 76 | DO_3D_OVR( nn_hls, nn_hls, nn_hls, nn_hls, 1, jpk ) |
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| 77 | hdiv(ji,jj,jk) = 0._wp ! initialize hdiv for the halos at the first time step |
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| 78 | END_3D |
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[3] | 79 | ENDIF |
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[5777] | 80 | ! |
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[15150] | 81 | DO_3D_OVR( nn_hls-1, nn_hls, nn_hls-1, nn_hls, 1, jpkm1 ) !== Horizontal divergence ==! |
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[14820] | 82 | ! round brackets added to fix the order of floating point operations |
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| 83 | ! needed to ensure halo 1 - halo 2 compatibility |
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[15150] | 84 | hdiv(ji,jj,jk) = ( ( e2u(ji ,jj) * e3u(ji ,jj,jk,Kmm) * uu(ji ,jj,jk,Kmm) & |
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| 85 | & - e2u(ji-1,jj) * e3u(ji-1,jj,jk,Kmm) * uu(ji-1,jj,jk,Kmm) & |
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[14820] | 86 | & ) & ! bracket for halo 1 - halo 2 compatibility |
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[15150] | 87 | & + ( e1v(ji,jj ) * e3v(ji,jj ,jk,Kmm) * vv(ji,jj ,jk,Kmm) & |
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| 88 | & - e1v(ji,jj-1) * e3v(ji,jj-1,jk,Kmm) * vv(ji,jj-1,jk,Kmm) & |
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[14820] | 89 | & ) & ! bracket for halo 1 - halo 2 compatibility |
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| 90 | & ) * r1_e1e2t(ji,jj) / e3t(ji,jj,jk,Kmm) |
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[12377] | 91 | END_3D |
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| 92 | ! |
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[15055] | 93 | IF( ln_rnf ) CALL sbc_rnf_div( hdiv, Kmm ) !== runoffs ==! (update hdiv field) |
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[2528] | 94 | ! |
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[9023] | 95 | #if defined key_asminc |
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[12377] | 96 | IF( ln_sshinc .AND. ln_asmiau ) CALL ssh_asm_div( kt, Kbb, Kmm, hdiv ) !== SSH assimilation ==! (update hdiv field) |
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[9023] | 97 | ! |
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| 98 | #endif |
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[12377] | 99 | IF( ln_isf ) CALL isf_hdiv( kt, Kmm, hdiv ) !== ice shelf ==! (update hdiv field) |
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[5777] | 100 | ! |
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[15058] | 101 | IF( nn_hls==1 ) CALL lbc_lnk( 'divhor', hdiv, 'T', 1.0_wp ) ! (no sign change) |
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| 102 | ! ! needed for ww in sshwzv |
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[9019] | 103 | IF( ln_timing ) CALL timing_stop('div_hor') |
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[5777] | 104 | ! |
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| 105 | END SUBROUTINE div_hor |
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[3] | 106 | |
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| 107 | !!====================================================================== |
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[5777] | 108 | END MODULE divhor |
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