| 1 | MODULE iscpldiv |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE iscpldiv*** |
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| 4 | !! Divergence correction : compute and save the divergence correction due to ice sheet/ocean coupling |
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| 5 | !!===================================================================== |
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| 6 | !! History : NEMO ! 2018-06 A. Siahaan: original |
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| 7 | !!---------------------------------------------------------------------- |
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| 8 | |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | !! iscpl_div_corr : compute the divergence correction |
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| 11 | !! iscpl_div : update hdivn with the divergence correction |
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| 12 | !! iscpl_div_tra : update tsa with contribution from the divergence correction |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | USE dom_oce ! ocean space and time domain |
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| 15 | USE oce ! global tra/dyn variable |
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| 16 | USE in_out_manager ! I/O manager |
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| 17 | USE lib_mpp ! MPP library |
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| 18 | USE lib_fortran ! MPP library |
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| 19 | USE wrk_nemo ! Memory allocation |
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| 20 | USE lbclnk ! |
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| 21 | USE iscplini |
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| 22 | |
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| 23 | IMPLICIT NONE |
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| 24 | PRIVATE |
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| 25 | |
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| 26 | PUBLIC iscpl_div |
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| 27 | PUBLIC iscpl_div_tra |
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| 28 | PUBLIC iscpl_div_corr |
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| 29 | !! |
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| 30 | !! * Substitutions |
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| 31 | # include "domzgr_substitute.h90" |
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| 32 | # include "vectopt_loop_substitute.h90" |
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| 33 | !!---------------------------------------------------------------------- |
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| 34 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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| 35 | !! $Id: sbcrnf.F90 4666 2014-06-11 12:52:23Z mathiot $ |
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| 36 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 37 | !!---------------------------------------------------------------------- |
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| 38 | CONTAINS |
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| 39 | |
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| 40 | SUBROUTINE iscpl_div( phdivn ) |
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| 41 | !!---------------------------------------------------------------------- |
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| 42 | !! *** ROUTINE iscpl_div *** |
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| 43 | !! |
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| 44 | !! ** Purpose : update the horizontal divergence |
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| 45 | !! |
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| 46 | !! ** Method : |
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| 47 | !! CAUTION : iscpl is positive (inflow) and expressed in |
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| 48 | !m/s |
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| 49 | !! |
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| 50 | !! ** Action : phdivn increase by the iscpl correction term |
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| 51 | !!---------------------------------------------------------------------- |
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| 52 | REAL(wp), DIMENSION(:,:,:), INTENT(inout) :: phdivn ! horizontal divergence |
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| 53 | !! |
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| 54 | !!---------------------------------------------------------------------- |
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| 55 | ! |
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| 56 | IF(lwp) WRITE(numout,*) 'adding the divergence correction contribution at nit000' |
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| 57 | |
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| 58 | phdivn(:,:,:) = phdivn(:,:,:) + rhdivdiff(:,:,:) |
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| 59 | |
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| 60 | END SUBROUTINE iscpl_div |
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| 61 | |
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| 62 | SUBROUTINE iscpl_div_tra( ptsa ) |
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| 63 | !!---------------------------------------------------------------------- |
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| 64 | !! *** ROUTINE iscpl_div_tra *** |
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| 65 | !! |
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| 66 | !! ** Purpose : update the active tracer tendency |
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| 67 | !! |
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| 68 | !! ** Method : |
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| 69 | !! CAUTION : iscpl is positive (inflow) and expressed in |
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| 70 | !m/s |
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| 71 | !! |
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| 72 | !! ** Action : ptsa increase by the iscpl correction term |
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| 73 | !!---------------------------------------------------------------------- |
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| 74 | REAL(wp), DIMENSION(:,:,:,:), INTENT(inout) :: ptsa ! active tracer tendency |
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| 75 | !! |
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| 76 | !!---------------------------------------------------------------------- |
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| 77 | ! |
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| 78 | IF (lwp) WRITE(numout,*) 'add tendency tsa due to re-meshing at kt = nit000' |
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| 79 | |
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| 80 | ptsa(:,:,:,1) = ptsa(:,:,:,1) + rhdivdiff_trac(:,:,:,1)*tmask(:,:,:) |
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| 81 | ptsa(:,:,:,2) = ptsa(:,:,:,2) + rhdivdiff_trac(:,:,:,2)*tmask(:,:,:) |
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| 82 | |
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| 83 | END SUBROUTINE iscpl_div_tra |
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| 84 | |
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| 85 | |
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| 86 | |
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| 87 | SUBROUTINE iscpl_div_corr(ptmask_b, pe3t_b, pe3u_b, pe3v_b) |
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| 88 | !!---------------------------------------------------------------------- |
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| 89 | !! *** ROUTINE iscpl_div_corr *** |
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| 90 | !! |
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| 91 | !! ** Purpose : compute the divergence correction |
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| 92 | !! |
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| 93 | !! ** Method : |
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| 94 | !! compute the difference of hdivn*e3t_n between before and after remeshing |
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| 95 | !! transfer the missing hdvn*e3t_n from top of isf to the new mikt |
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| 96 | !! transfer the missing hdvn*e3t_n from bottom of isf to the new mbkt |
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| 97 | !!---------------------------------------------------------------------- |
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| 98 | REAL(wp), DIMENSION(:,:,: ), INTENT(in ) :: ptmask_b !! mask before |
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| 99 | REAL(wp), DIMENSION(:,:,: ), INTENT(in ) :: pe3t_b , pe3u_b , pe3v_b !! scale factor before |
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| 100 | !! |
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| 101 | INTEGER :: ji, jj, jk, jtop !! loop index |
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| 102 | !! |
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| 103 | REAL(wp):: zvol, zuflux_sum, zvflux_sum |
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| 104 | |
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| 105 | REAL(wp), DIMENSION(:,:,: ), POINTER :: zhdiv, zhdiv2 |
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| 106 | !!---------------------------------------------------------------------- |
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| 107 | |
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| 108 | !! allocate variables |
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| 109 | CALL wrk_alloc(jpi,jpj,jpk, zhdiv, zhdiv2) |
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| 110 | |
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| 111 | !-----initialise the divergence and tracer correction------ |
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| 112 | zhdiv(:,:,:) = 0._wp |
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| 113 | rhdivdiff(:,:,:) = 0._wp |
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| 114 | rhdivdiff_trac(:,:,:,:) = 0._wp |
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| 115 | zhdiv2(:,:,:) = 0._wp |
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| 116 | |
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| 117 | |
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| 118 | !calculate the hdivn*e3tn with the last values before re-meshing (should only be different from the real hdivn for cavity only) |
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| 119 | !hdivb and rot should remain the same as the previous timestep bcause it will be used in dyn_ldf, so we did not use div_cur to calculate rhdivdiff as we should only use div_cur once for div_cur(nit000) in order not to update hdivb and rot |
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| 120 | |
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| 121 | !----------------------------------------------hdivn before remeshing------------------------------------- |
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| 122 | DO jj = 2, jpjm1 |
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| 123 | DO ji = 2, jpim1 |
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| 124 | DO jk = 1, jpk ! Horizontal slab |
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| 125 | zhdiv2(ji,jj,jk) = & |
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| 126 | ( e2u(ji,jj)*pe3u_b(ji,jj,jk) * un(ji,jj,jk) - e2u(ji-1,jj )*pe3u_b(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
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| 127 | + e1v(ji,jj)*pe3v_b(ji,jj,jk) * vn(ji,jj,jk) - e1v(ji ,jj-1)*pe3v_b(ji ,jj-1,jk) * vn(ji ,jj-1,jk) ) & |
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| 128 | / ( e1t(ji,jj) * e2t(ji,jj) )*ptmask_b(ji,jj,jk) |
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| 129 | END DO |
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| 130 | END DO |
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| 131 | ENDDO |
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| 132 | |
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| 133 | ! velocity with the new mask |
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| 134 | un(:,:,:)=un(:,:,:)*umask(:,:,:) |
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| 135 | vn(:,:,:)=vn(:,:,:)*vmask(:,:,:) |
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| 136 | |
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| 137 | |
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| 138 | !calling divcur to update hdivn (ingat: hdivb = hdivn(before re-meshing), yet that hdivn was not using the recent values, as it was not updated at the end of timestep ) |
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| 139 | !CALL div_cur(nit000) |
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| 140 | !----------------------------------------------hdivn after remeshing------------------------------------- |
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| 141 | DO jj = 2, jpjm1 |
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| 142 | DO ji = 2, jpim1 |
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| 143 | DO jk = 1, jpk ! Horizontal slab |
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| 144 | zhdiv(ji,jj,jk) = & |
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| 145 | ( e2u(ji,jj)*fse3u_n(ji,jj,jk) * un(ji,jj,jk) - e2u(ji-1,jj )*fse3u_n(ji-1,jj ,jk) * un(ji-1,jj ,jk) & |
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| 146 | + e1v(ji,jj)*fse3v_n(ji,jj,jk) * vn(ji,jj,jk) - e1v(ji ,jj-1)*fse3v_n(ji ,jj-1,jk) * vn(ji ,jj-1,jk) ) & |
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| 147 | / ( e1t(ji,jj) * e2t(ji,jj) )*tmask(ji,jj,jk) |
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| 148 | END DO |
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| 149 | END DO |
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| 150 | ENDDO |
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| 151 | |
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| 152 | zhdiv2(:,:,:) = zhdiv2(:,:,:) - zhdiv(:,:,:) ! non-cavity will be = 0 |
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| 153 | rhdivdiff(:,:,:) = zhdiv2(:,:,:) |
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| 154 | |
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| 155 | !----transfers the divergence of closed cells to the new top cell------ |
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| 156 | !until this point, rhdivdiff has the same unit as hdivn*e3t |
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| 157 | DO jj = 2, jpjm1 |
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| 158 | DO ji = 2, jpim1 |
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| 159 | jk = mikt(ji,jj) |
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| 160 | IF (jk > 1 .AND. ssmask(ji,jj) == 1 ) THEN |
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| 161 | rhdivdiff(ji,jj,jk) = rhdivdiff(ji,jj,jk) + SUM(rhdivdiff(ji,jj,1:jk-1)*ptmask_b(ji,jj,1:jk-1)) |
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| 162 | ENDIF |
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| 163 | |
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| 164 | jk = mbkt(ji,jj) |
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| 165 | IF (ssmask(ji,jj) == 1 ) THEN |
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| 166 | rhdivdiff(ji,jj,jk) = rhdivdiff(ji,jj,jk) + SUM(rhdivdiff(ji,jj,jk+1:jpk)*ptmask_b(ji,jj,jk+1:jpk)) |
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| 167 | ENDIF |
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| 168 | |
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| 169 | END DO |
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| 170 | ENDDO |
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| 171 | |
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| 172 | |
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| 173 | !----cancel all the divergence of closed cells with tmask, then convert it to hdivn by dividing with e3t_n (it is now safe to do this) |
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| 174 | ! also cancelling totally closed cavity column |
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| 175 | rhdivdiff(:,:,:) = rhdivdiff(:,:,:)*tmask(:,:,:)/fse3t_n(:,:,:) |
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| 176 | !tracer correction trend associated with the divergence correction; opposite sign of divergence |
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| 177 | rhdivdiff_trac(:,:,:,1) = - rhdivdiff(:,:,:) * tsb(:,:,:,1)*tmask(:,:,:) |
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| 178 | rhdivdiff_trac(:,:,:,2) = - rhdivdiff(:,:,:) * tsb(:,:,:,2)*tmask(:,:,:) |
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| 179 | |
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| 180 | CALL lbc_lnk(rhdivdiff, 'T',1._wp) |
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| 181 | CALL lbc_lnk(rhdivdiff_trac(:,:,:,1), 'T',1._wp) |
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| 182 | CALL lbc_lnk(rhdivdiff_trac(:,:,:,2), 'T',1._wp) |
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| 183 | |
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| 184 | CALL wrk_dealloc(jpi,jpj,jpk, zhdiv, zhdiv2 ) |
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| 185 | |
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| 186 | END SUBROUTINE iscpl_div_corr |
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| 187 | |
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| 188 | END MODULE iscpldiv |
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