[821] | 1 | MODULE limmsh_2 |
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[3] | 2 | !!====================================================================== |
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[821] | 3 | !! *** MODULE limmsh_2 *** |
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| 4 | !! LIM 2.0 ice model : definition of the ice mesh parameters |
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[3] | 5 | !!====================================================================== |
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[2528] | 6 | !! History : - ! 2001-04 (LIM) original code |
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| 7 | !! 1.0 ! 2002-08 (C. Ethe, G. Madec) F90, module |
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| 8 | !! 3.3 ! 2009-05 (G. Garric, C. Bricaud) addition of the lim2_evp case |
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| 9 | !!---------------------------------------------------------------------- |
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[821] | 10 | #if defined key_lim2 |
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[3] | 11 | !!---------------------------------------------------------------------- |
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[821] | 12 | !! 'key_lim2' LIM 2.0sea-ice model |
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[58] | 13 | !!---------------------------------------------------------------------- |
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[821] | 14 | !! lim_msh_2 : definition of the ice mesh |
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[3] | 15 | !!---------------------------------------------------------------------- |
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| 16 | USE phycst |
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| 17 | USE dom_oce |
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[821] | 18 | USE dom_ice_2 |
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[3] | 19 | USE lbclnk |
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[58] | 20 | USE in_out_manager |
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[2715] | 21 | USE lib_mpp ! MPP library |
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[3294] | 22 | #if defined key_lim2_vp |
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| 23 | USE wrk_nemo ! work arrays |
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| 24 | #endif |
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[3625] | 25 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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[3] | 26 | |
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| 27 | IMPLICIT NONE |
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| 28 | PRIVATE |
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| 29 | |
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[821] | 30 | PUBLIC lim_msh_2 ! routine called by ice_ini_2.F90 |
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[3] | 31 | |
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| 32 | !!---------------------------------------------------------------------- |
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[2528] | 33 | !! NEMO/LIM2 3.3 , UCL - NEMO Consortium (2010) |
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[1156] | 34 | !! $Id$ |
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[2528] | 35 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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[3] | 36 | !!---------------------------------------------------------------------- |
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| 37 | CONTAINS |
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| 38 | |
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[821] | 39 | SUBROUTINE lim_msh_2 |
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[3] | 40 | !!------------------------------------------------------------------- |
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[821] | 41 | !! *** ROUTINE lim_msh_2 *** |
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[3] | 42 | !! |
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| 43 | !! ** Purpose : Definition of the charact. of the numerical grid |
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| 44 | !! |
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| 45 | !! ** Action : - Initialisation of some variables |
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| 46 | !! - Definition of some constants linked with the grid |
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| 47 | !! - Definition of the metric coef. for the sea/ice |
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| 48 | !! - Initialization of the ice masks (tmsk, umsk) |
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| 49 | !! |
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| 50 | !! ** Refer. : Deleersnijder et al. Ocean Modelling 100, 7-10 |
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| 51 | !!--------------------------------------------------------------------- |
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[12] | 52 | INTEGER :: ji, jj ! dummy loop indices |
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[2528] | 53 | REAL(wp) :: zusden ! local scalars |
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| 54 | #if defined key_lim2_vp |
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| 55 | REAL(wp) :: zusden2 ! local scalars |
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| 56 | REAL(wp) :: zh1p , zh2p ! - - |
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| 57 | REAL(wp) :: zd2d1p, zd1d2p ! - - |
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[3294] | 58 | REAL(wp), POINTER, DIMENSION(:,:) :: zd2d1, zd1d2 ! 2D workspace |
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[2528] | 59 | #endif |
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[3] | 60 | !!--------------------------------------------------------------------- |
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[58] | 61 | |
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[3294] | 62 | #if defined key_lim2_vp |
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| 63 | CALL wrk_alloc( jpi, jpj, zd2d1, zd1d2 ) |
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| 64 | #endif |
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[2715] | 65 | |
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[58] | 66 | IF(lwp) THEN |
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| 67 | WRITE(numout,*) |
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[821] | 68 | WRITE(numout,*) 'lim_msh_2 : LIM 2.0 sea-ice model, mesh initialization' |
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| 69 | WRITE(numout,*) '~~~~~~~~~' |
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[58] | 70 | ENDIF |
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[3] | 71 | |
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| 72 | !---------------------------------------------------------- |
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| 73 | ! Initialization of local and some global (common) variables |
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| 74 | !------------------------------------------------------------------ |
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| 75 | |
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[58] | 76 | njeq = INT( jpj / 2 ) !i bug mpp potentiel |
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| 77 | njeqm1 = njeq - 1 |
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[3] | 78 | |
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[58] | 79 | !i DO jj = 1, jpj |
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| 80 | !i zmsk(jj) = SUM( tmask(:,jj,:) ) ! = 0 if land everywhere on a j-line |
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| 81 | !!ii write(numout,*) jj, zind(jj) |
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| 82 | !i END DO |
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[3] | 83 | |
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[7646] | 84 | IF( ff_t(1,1) * ff_t(1,nlcj) < 0.e0 ) THEN ! local domain include both hemisphere |
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[58] | 85 | l_jeq = .TRUE. |
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| 86 | njeq = 1 |
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[7646] | 87 | DO WHILE ( njeq <= jpj .AND. ff_t(1,njeq) < 0.e0 ) |
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[58] | 88 | njeq = njeq + 1 |
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| 89 | END DO |
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| 90 | IF(lwp ) WRITE(numout,*) ' the equator is inside the domain at about njeq = ', njeq |
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[7646] | 91 | ELSEIF( ff_t(1,1) < 0.e0 ) THEN |
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[58] | 92 | l_jeq = .FALSE. |
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[192] | 93 | njeq = jpj |
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[58] | 94 | IF(lwp ) WRITE(numout,*) ' the model domain is entirely in the southern hemisphere: njeq = ', njeq |
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| 95 | ELSE |
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| 96 | l_jeq = .FALSE. |
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[192] | 97 | njeq = 2 |
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[58] | 98 | IF(lwp ) WRITE(numout,*) ' the model domain is entirely in the northern hemisphere: njeq = ', njeq |
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| 99 | ENDIF |
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| 100 | |
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| 101 | njeqm1 = njeq - 1 |
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| 102 | |
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| 103 | |
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[3] | 104 | ! For each grid, definition of geometric tables |
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| 105 | !------------------------------------------------------------------ |
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| 106 | |
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| 107 | !------------------- |
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[58] | 108 | ! Conventions : ! |
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[3] | 109 | !------------------- |
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| 110 | ! indices 1 \ 2 <-> localisation in the 2 direction x \ y |
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| 111 | ! 3rd indice <-> localisation on the mesh : |
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| 112 | ! 0 = Centre ; 1 = corner W x(i-1/2) ; 2 = corner S y(j-1/2) ; |
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| 113 | ! 3 = corner SW x(i-1/2),y(j-1/2) |
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| 114 | !------------------- |
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[58] | 115 | !!ibug ??? |
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| 116 | wght(:,:,:,:) = 0.e0 |
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[2528] | 117 | tmu(:,:) = 0.e0 |
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| 118 | #if defined key_lim2_vp |
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| 119 | akappa(:,:,:,:) = 0.e0 |
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[58] | 120 | alambd(:,:,:,:,:,:) = 0.e0 |
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[2528] | 121 | #else |
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| 122 | tmv(:,:) = 0.e0 |
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| 123 | tmf(:,:) = 0.e0 |
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| 124 | #endif |
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[58] | 125 | !!i |
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[3] | 126 | |
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[2528] | 127 | |
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| 128 | #if defined key_lim2_vp |
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[3] | 129 | ! metric coefficients for sea ice dynamic |
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| 130 | !---------------------------------------- |
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| 131 | ! ! akappa |
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[12] | 132 | DO jj = 2, jpj |
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[58] | 133 | zd1d2(:,jj) = e1v(:,jj) - e1v(:,jj-1) |
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[3] | 134 | END DO |
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[12] | 135 | CALL lbc_lnk( zd1d2, 'T', -1. ) |
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[3] | 136 | |
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[58] | 137 | DO ji = 2, jpi |
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| 138 | zd2d1(ji,:) = e2u(ji,:) - e2u(ji-1,:) |
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[3] | 139 | END DO |
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[12] | 140 | CALL lbc_lnk( zd2d1, 'T', -1. ) |
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[3] | 141 | |
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[58] | 142 | akappa(:,:,1,1) = 1.0 / ( 2.0 * e1t(:,:) ) |
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| 143 | akappa(:,:,1,2) = zd1d2(:,:) / ( 4.0 * e1t(:,:) * e2t(:,:) ) |
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| 144 | akappa(:,:,2,1) = zd2d1(:,:) / ( 4.0 * e1t(:,:) * e2t(:,:) ) |
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| 145 | akappa(:,:,2,2) = 1.0 / ( 2.0 * e2t(:,:) ) |
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[3] | 146 | |
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| 147 | ! ! weights (wght) |
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[12] | 148 | DO jj = 2, jpj |
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| 149 | DO ji = 2, jpi |
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[3] | 150 | zusden = 1. / ( ( e1t(ji,jj) + e1t(ji-1,jj ) ) & |
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| 151 | & * ( e2t(ji,jj) + e2t(ji ,jj-1) ) ) |
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| 152 | wght(ji,jj,1,1) = zusden * e1t(ji ,jj) * e2t(ji,jj ) |
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| 153 | wght(ji,jj,1,2) = zusden * e1t(ji ,jj) * e2t(ji,jj-1) |
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| 154 | wght(ji,jj,2,1) = zusden * e1t(ji-1,jj) * e2t(ji,jj ) |
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| 155 | wght(ji,jj,2,2) = zusden * e1t(ji-1,jj) * e2t(ji,jj-1) |
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| 156 | END DO |
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| 157 | END DO |
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| 158 | CALL lbc_lnk( wght(:,:,1,1), 'I', 1. ) ! CAUTION: even with the lbc_lnk at ice U-V-point |
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| 159 | CALL lbc_lnk( wght(:,:,1,2), 'I', 1. ) ! the value of wght at jpj is wrong |
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| 160 | CALL lbc_lnk( wght(:,:,2,1), 'I', 1. ) ! but it is never used |
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| 161 | CALL lbc_lnk( wght(:,:,2,2), 'I', 1. ) |
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[2528] | 162 | #else |
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| 163 | ! metric coefficients for sea ice dynamic (EVP rheology) |
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| 164 | !---------------------------------------- |
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| 165 | DO jj = 1, jpjm1 ! weights (wght) at F-points |
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| 166 | DO ji = 1, jpim1 |
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| 167 | zusden = 1. / ( ( e1t(ji+1,jj ) + e1t(ji,jj) ) & |
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| 168 | & * ( e2t(ji ,jj+1) + e2t(ji,jj) ) ) |
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| 169 | wght(ji,jj,1,1) = zusden * e1t(ji+1,jj) * e2t(ji,jj+1) |
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| 170 | wght(ji,jj,1,2) = zusden * e1t(ji+1,jj) * e2t(ji,jj ) |
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| 171 | wght(ji,jj,2,1) = zusden * e1t(ji ,jj) * e2t(ji,jj+1) |
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| 172 | wght(ji,jj,2,2) = zusden * e1t(ji ,jj) * e2t(ji,jj ) |
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| 173 | END DO |
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| 174 | END DO |
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| 175 | CALL lbc_lnk( wght(:,:,1,1), 'F', 1. ) ; CALL lbc_lnk( wght(:,:,1,2),'F', 1. ) ! lateral boundary cond. |
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| 176 | CALL lbc_lnk( wght(:,:,2,1), 'F', 1. ) ; CALL lbc_lnk( wght(:,:,2,2),'F', 1. ) |
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| 177 | #endif |
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[3] | 178 | |
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| 179 | ! Coefficients for divergence of the stress tensor |
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| 180 | !------------------------------------------------- |
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| 181 | |
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[2528] | 182 | #if defined key_lim2_vp |
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[12] | 183 | DO jj = 2, jpj |
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[1694] | 184 | DO ji = 2, jpi ! NO vector opt. |
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[3] | 185 | zh1p = e1t(ji ,jj ) * wght(ji,jj,2,2) & |
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| 186 | & + e1t(ji-1,jj ) * wght(ji,jj,1,2) & |
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| 187 | & + e1t(ji ,jj-1) * wght(ji,jj,2,1) & |
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| 188 | & + e1t(ji-1,jj-1) * wght(ji,jj,1,1) |
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| 189 | |
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| 190 | zh2p = e2t(ji ,jj ) * wght(ji,jj,2,2) & |
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| 191 | & + e2t(ji-1,jj ) * wght(ji,jj,1,2) & |
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| 192 | & + e2t(ji ,jj-1) * wght(ji,jj,2,1) & |
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| 193 | & + e2t(ji-1,jj-1) * wght(ji,jj,1,1) |
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| 194 | |
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[58] | 195 | ! better written but change the last digit and thus solver in less than 100 timestep |
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[3] | 196 | ! zh1p = e1t(ji-1,jj ) * wght(ji,jj,1,2) + e1t(ji,jj ) * wght(ji,jj,2,2) & |
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| 197 | ! & + e1t(ji-1,jj-1) * wght(ji,jj,1,1) + e1t(ji,jj-1) * wght(ji,jj,2,1) |
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| 198 | |
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| 199 | ! zh2p = e2t(ji-1,jj ) * wght(ji,jj,1,2) + e2t(ji,jj ) * wght(ji,jj,2,2) & |
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| 200 | ! & + e2t(ji-1,jj-1) * wght(ji,jj,1,1) + e2t(ji,jj-1) * wght(ji,jj,2,1) |
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| 201 | |
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[58] | 202 | !!ibug =0 zusden = 1.0 / ( zh1p * zh2p * 4.e0 ) |
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| 203 | zusden = 1.0 / MAX( zh1p * zh2p * 4.e0 , 1.e-20 ) |
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[3] | 204 | zusden2 = zusden * 2.0 |
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| 205 | |
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| 206 | zd1d2p = zusden * 0.5 * ( -e1t(ji-1,jj-1) + e1t(ji-1,jj ) - e1t(ji,jj-1) + e1t(ji ,jj) ) |
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| 207 | zd2d1p = zusden * 0.5 * ( e2t(ji ,jj-1) - e2t(ji-1,jj-1) + e2t(ji,jj ) - e2t(ji-1,jj) ) |
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| 208 | |
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| 209 | alambd(ji,jj,2,2,2,1) = zusden2 * e2t(ji ,jj-1) |
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| 210 | alambd(ji,jj,2,2,2,2) = zusden2 * e2t(ji ,jj ) |
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| 211 | alambd(ji,jj,2,2,1,1) = zusden2 * e2t(ji-1,jj-1) |
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| 212 | alambd(ji,jj,2,2,1,2) = zusden2 * e2t(ji-1,jj ) |
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| 213 | |
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| 214 | alambd(ji,jj,1,1,2,1) = zusden2 * e1t(ji ,jj-1) |
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| 215 | alambd(ji,jj,1,1,2,2) = zusden2 * e1t(ji ,jj ) |
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| 216 | alambd(ji,jj,1,1,1,1) = zusden2 * e1t(ji-1,jj-1) |
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| 217 | alambd(ji,jj,1,1,1,2) = zusden2 * e1t(ji-1,jj ) |
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| 218 | |
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| 219 | alambd(ji,jj,1,2,2,1) = zd1d2p |
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| 220 | alambd(ji,jj,1,2,2,2) = zd1d2p |
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| 221 | alambd(ji,jj,1,2,1,1) = zd1d2p |
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| 222 | alambd(ji,jj,1,2,1,2) = zd1d2p |
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| 223 | |
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| 224 | alambd(ji,jj,2,1,2,1) = zd2d1p |
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| 225 | alambd(ji,jj,2,1,2,2) = zd2d1p |
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| 226 | alambd(ji,jj,2,1,1,1) = zd2d1p |
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| 227 | alambd(ji,jj,2,1,1,2) = zd2d1p |
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| 228 | END DO |
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| 229 | END DO |
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| 230 | |
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| 231 | CALL lbc_lnk( alambd(:,:,2,2,2,1), 'I', 1. ) ! CAUTION: even with the lbc_lnk at ice U-V point |
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| 232 | CALL lbc_lnk( alambd(:,:,2,2,2,2), 'I', 1. ) ! the value of wght at jpj is wrong |
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| 233 | CALL lbc_lnk( alambd(:,:,2,2,1,1), 'I', 1. ) ! but it is never used |
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| 234 | CALL lbc_lnk( alambd(:,:,2,2,1,2), 'I', 1. ) ! |
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| 235 | |
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| 236 | CALL lbc_lnk( alambd(:,:,1,1,2,1), 'I', 1. ) ! CAUTION: idem |
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| 237 | CALL lbc_lnk( alambd(:,:,1,1,2,2), 'I', 1. ) ! |
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| 238 | CALL lbc_lnk( alambd(:,:,1,1,1,1), 'I', 1. ) ! |
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| 239 | CALL lbc_lnk( alambd(:,:,1,1,1,2), 'I', 1. ) ! |
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| 240 | |
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| 241 | CALL lbc_lnk( alambd(:,:,1,2,2,1), 'I', 1. ) ! CAUTION: idem |
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| 242 | CALL lbc_lnk( alambd(:,:,1,2,2,2), 'I', 1. ) ! |
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| 243 | CALL lbc_lnk( alambd(:,:,1,2,1,1), 'I', 1. ) ! |
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| 244 | CALL lbc_lnk( alambd(:,:,1,2,1,2), 'I', 1. ) ! |
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| 245 | |
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| 246 | CALL lbc_lnk( alambd(:,:,2,1,2,1), 'I', 1. ) ! CAUTION: idem |
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| 247 | CALL lbc_lnk( alambd(:,:,2,1,2,2), 'I', 1. ) ! |
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| 248 | CALL lbc_lnk( alambd(:,:,2,1,1,1), 'I', 1. ) ! |
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| 249 | CALL lbc_lnk( alambd(:,:,2,1,1,2), 'I', 1. ) ! |
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[2528] | 250 | #endif |
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[3] | 251 | |
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| 252 | |
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| 253 | ! Initialization of ice masks |
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| 254 | !---------------------------- |
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| 255 | |
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| 256 | tms(:,:) = tmask(:,:,1) ! ice T-point : use surface tmask |
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| 257 | |
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[2528] | 258 | #if defined key_lim2_vp |
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| 259 | ! VP rheology : ice velocity point is I-point |
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[3] | 260 | !i here we can use umask with a i and j shift of -1,-1 |
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| 261 | tmu(:,1) = 0.e0 |
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| 262 | tmu(1,:) = 0.e0 |
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| 263 | DO jj = 2, jpj ! ice U.V-point: computed from ice T-point mask |
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[1694] | 264 | DO ji = 2, jpim1 ! NO vector opt. |
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[3] | 265 | tmu(ji,jj) = tms(ji,jj) * tms(ji-1,jj) * tms(ji,jj-1) * tms(ji-1,jj-1) |
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| 266 | END DO |
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| 267 | END DO |
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[2528] | 268 | CALL lbc_lnk( tmu(:,:), 'I', 1. ) !--lateral boundary conditions |
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| 269 | #else |
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| 270 | ! EVP rheology : ice velocity point are U- & V-points ; ice vorticity |
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| 271 | ! point is F-point |
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| 272 | tmu(:,:) = umask(:,:,1) |
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| 273 | tmv(:,:) = vmask(:,:,1) |
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| 274 | tmf(:,:) = 0.e0 ! used of fmask except its special value along the coast (rn_shlat) |
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| 275 | WHERE( fmask(:,:,1) == 1.e0 ) tmf(:,:) = 1.e0 |
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| 276 | #endif |
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| 277 | ! |
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[3] | 278 | ! unmasked and masked area of T-grid cell |
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| 279 | area(:,:) = e1t(:,:) * e2t(:,:) |
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[2528] | 280 | ! |
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[3294] | 281 | #if defined key_lim2_vp |
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| 282 | CALL wrk_dealloc( jpi, jpj, zd2d1, zd1d2 ) |
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| 283 | #endif |
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[2715] | 284 | ! |
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[821] | 285 | END SUBROUTINE lim_msh_2 |
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[58] | 286 | |
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[3] | 287 | #else |
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[58] | 288 | !!---------------------------------------------------------------------- |
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| 289 | !! Default option Dummy Module NO LIM sea-ice model |
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| 290 | !!---------------------------------------------------------------------- |
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[3] | 291 | CONTAINS |
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[821] | 292 | SUBROUTINE lim_msh_2 ! Dummy routine |
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| 293 | END SUBROUTINE lim_msh_2 |
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[58] | 294 | #endif |
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[3] | 295 | |
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| 296 | !!====================================================================== |
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[821] | 297 | END MODULE limmsh_2 |
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