[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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[821] | 6 | #if defined key_lim2 |
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[3] | 7 | !!---------------------------------------------------------------------- |
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[821] | 8 | !! 'key_lim2' LIM 2.0sea-ice model |
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[58] | 9 | !!---------------------------------------------------------------------- |
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[821] | 10 | !! lim_msh_2 : definition of the ice mesh |
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[3] | 11 | !!---------------------------------------------------------------------- |
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| 12 | !! * Modules used |
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| 13 | USE phycst |
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| 14 | USE dom_oce |
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[821] | 15 | USE dom_ice_2 |
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[3] | 16 | USE lbclnk |
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[58] | 17 | USE in_out_manager |
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[3] | 18 | |
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| 19 | IMPLICIT NONE |
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| 20 | PRIVATE |
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| 21 | |
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| 22 | !! * Accessibility |
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[821] | 23 | PUBLIC lim_msh_2 ! routine called by ice_ini_2.F90 |
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[3] | 24 | |
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| 25 | !!---------------------------------------------------------------------- |
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[247] | 26 | !! LIM 2.0, UCL-LOCEAN-IPSL (2005) |
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[1156] | 27 | !! $Id$ |
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[247] | 28 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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[3] | 29 | !!---------------------------------------------------------------------- |
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| 30 | |
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| 31 | CONTAINS |
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| 32 | |
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[821] | 33 | SUBROUTINE lim_msh_2 |
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[3] | 34 | !!------------------------------------------------------------------- |
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[821] | 35 | !! *** ROUTINE lim_msh_2 *** |
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[3] | 36 | !! |
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| 37 | !! ** Purpose : Definition of the charact. of the numerical grid |
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| 38 | !! |
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| 39 | !! ** Action : - Initialisation of some variables |
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| 40 | !! - Definition of some constants linked with the grid |
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| 41 | !! - Definition of the metric coef. for the sea/ice |
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| 42 | !! - Initialization of the ice masks (tmsk, umsk) |
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| 43 | !! |
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| 44 | !! ** Refer. : Deleersnijder et al. Ocean Modelling 100, 7-10 |
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| 45 | !! |
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| 46 | !! ** History : |
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| 47 | !! original : 01-04 (LIM) |
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| 48 | !! addition : 02-08 (C. Ethe, G. Madec) |
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| 49 | !!--------------------------------------------------------------------- |
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| 50 | !! * Local variables |
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[12] | 51 | INTEGER :: ji, jj ! dummy loop indices |
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[3] | 52 | |
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| 53 | REAL(wp), DIMENSION(jpi,jpj) :: & |
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[12] | 54 | zd2d1 , zd1d2 ! Derivative of zh2 (resp. zh1) in the x direction |
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| 55 | ! ! (resp. y direction) (defined at the center) |
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[3] | 56 | REAL(wp) :: & |
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[58] | 57 | zh1p , zh2p , & ! Idem zh1, zh2 for the bottom left corner of the grid |
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| 58 | zd2d1p, zd1d2p , & ! Idem zd2d1, zd1d2 for the bottom left corner of the grid |
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| 59 | zusden, zusden2 ! temporary scalars |
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[3] | 60 | !!--------------------------------------------------------------------- |
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[58] | 61 | |
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| 62 | IF(lwp) THEN |
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| 63 | WRITE(numout,*) |
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[821] | 64 | WRITE(numout,*) 'lim_msh_2 : LIM 2.0 sea-ice model, mesh initialization' |
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| 65 | WRITE(numout,*) '~~~~~~~~~' |
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[58] | 66 | ENDIF |
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[3] | 67 | |
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| 68 | !---------------------------------------------------------- |
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| 69 | ! Initialization of local and some global (common) variables |
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| 70 | !------------------------------------------------------------------ |
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| 71 | |
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[58] | 72 | njeq = INT( jpj / 2 ) !i bug mpp potentiel |
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| 73 | njeqm1 = njeq - 1 |
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[3] | 74 | |
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| 75 | fcor(:,:) = 2. * omega * SIN( gphit(:,:) * rad ) ! coriolis factor |
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| 76 | |
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[58] | 77 | !i DO jj = 1, jpj |
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| 78 | !i zmsk(jj) = SUM( tmask(:,jj,:) ) ! = 0 if land everywhere on a j-line |
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| 79 | !!ii write(numout,*) jj, zind(jj) |
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| 80 | !i END DO |
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[3] | 81 | |
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[58] | 82 | IF( fcor(1,1) * fcor(1,nlcj) < 0.e0 ) THEN ! local domain include both hemisphere |
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| 83 | l_jeq = .TRUE. |
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| 84 | njeq = 1 |
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| 85 | DO WHILE ( njeq <= jpj .AND. fcor(1,njeq) < 0.e0 ) |
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| 86 | njeq = njeq + 1 |
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| 87 | END DO |
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| 88 | IF(lwp ) WRITE(numout,*) ' the equator is inside the domain at about njeq = ', njeq |
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| 89 | ELSEIF( fcor(1,1) < 0.e0 ) THEN |
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| 90 | l_jeq = .FALSE. |
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[192] | 91 | njeq = jpj |
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[58] | 92 | IF(lwp ) WRITE(numout,*) ' the model domain is entirely in the southern hemisphere: njeq = ', njeq |
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| 93 | ELSE |
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| 94 | l_jeq = .FALSE. |
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[192] | 95 | njeq = 2 |
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[58] | 96 | IF(lwp ) WRITE(numout,*) ' the model domain is entirely in the northern hemisphere: njeq = ', njeq |
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| 97 | ENDIF |
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| 98 | |
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| 99 | njeqm1 = njeq - 1 |
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| 100 | |
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| 101 | |
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[3] | 102 | ! For each grid, definition of geometric tables |
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| 103 | !------------------------------------------------------------------ |
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| 104 | |
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| 105 | !------------------- |
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[58] | 106 | ! Conventions : ! |
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[3] | 107 | !------------------- |
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| 108 | ! indices 1 \ 2 <-> localisation in the 2 direction x \ y |
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| 109 | ! 3rd indice <-> localisation on the mesh : |
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| 110 | ! 0 = Centre ; 1 = corner W x(i-1/2) ; 2 = corner S y(j-1/2) ; |
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| 111 | ! 3 = corner SW x(i-1/2),y(j-1/2) |
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| 112 | !------------------- |
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[58] | 113 | !!ibug ??? |
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| 114 | akappa(:,:,:,:) = 0.e0 |
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| 115 | wght(:,:,:,:) = 0.e0 |
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| 116 | alambd(:,:,:,:,:,:) = 0.e0 |
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| 117 | tmu(:,:) = 0.e0 |
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| 118 | !!i |
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[3] | 119 | |
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| 120 | |
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| 121 | ! metric coefficients for sea ice dynamic |
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| 122 | !---------------------------------------- |
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| 123 | ! ! akappa |
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[12] | 124 | DO jj = 2, jpj |
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[58] | 125 | zd1d2(:,jj) = e1v(:,jj) - e1v(:,jj-1) |
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[3] | 126 | END DO |
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[12] | 127 | CALL lbc_lnk( zd1d2, 'T', -1. ) |
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[3] | 128 | |
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[58] | 129 | DO ji = 2, jpi |
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| 130 | zd2d1(ji,:) = e2u(ji,:) - e2u(ji-1,:) |
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[3] | 131 | END DO |
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[12] | 132 | CALL lbc_lnk( zd2d1, 'T', -1. ) |
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[3] | 133 | |
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[58] | 134 | akappa(:,:,1,1) = 1.0 / ( 2.0 * e1t(:,:) ) |
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| 135 | akappa(:,:,1,2) = zd1d2(:,:) / ( 4.0 * e1t(:,:) * e2t(:,:) ) |
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| 136 | akappa(:,:,2,1) = zd2d1(:,:) / ( 4.0 * e1t(:,:) * e2t(:,:) ) |
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| 137 | akappa(:,:,2,2) = 1.0 / ( 2.0 * e2t(:,:) ) |
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[3] | 138 | |
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| 139 | ! ! weights (wght) |
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[12] | 140 | DO jj = 2, jpj |
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| 141 | DO ji = 2, jpi |
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[3] | 142 | zusden = 1. / ( ( e1t(ji,jj) + e1t(ji-1,jj ) ) & |
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| 143 | & * ( e2t(ji,jj) + e2t(ji ,jj-1) ) ) |
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| 144 | wght(ji,jj,1,1) = zusden * e1t(ji ,jj) * e2t(ji,jj ) |
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| 145 | wght(ji,jj,1,2) = zusden * e1t(ji ,jj) * e2t(ji,jj-1) |
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| 146 | wght(ji,jj,2,1) = zusden * e1t(ji-1,jj) * e2t(ji,jj ) |
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| 147 | wght(ji,jj,2,2) = zusden * e1t(ji-1,jj) * e2t(ji,jj-1) |
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| 148 | END DO |
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| 149 | END DO |
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| 150 | CALL lbc_lnk( wght(:,:,1,1), 'I', 1. ) ! CAUTION: even with the lbc_lnk at ice U-V-point |
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| 151 | CALL lbc_lnk( wght(:,:,1,2), 'I', 1. ) ! the value of wght at jpj is wrong |
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| 152 | CALL lbc_lnk( wght(:,:,2,1), 'I', 1. ) ! but it is never used |
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| 153 | CALL lbc_lnk( wght(:,:,2,2), 'I', 1. ) |
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| 154 | |
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| 155 | ! Coefficients for divergence of the stress tensor |
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| 156 | !------------------------------------------------- |
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| 157 | |
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[12] | 158 | DO jj = 2, jpj |
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[1694] | 159 | DO ji = 2, jpi ! NO vector opt. |
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[3] | 160 | zh1p = e1t(ji ,jj ) * wght(ji,jj,2,2) & |
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| 161 | & + e1t(ji-1,jj ) * wght(ji,jj,1,2) & |
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| 162 | & + e1t(ji ,jj-1) * wght(ji,jj,2,1) & |
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| 163 | & + e1t(ji-1,jj-1) * wght(ji,jj,1,1) |
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| 164 | |
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| 165 | zh2p = e2t(ji ,jj ) * wght(ji,jj,2,2) & |
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| 166 | & + e2t(ji-1,jj ) * wght(ji,jj,1,2) & |
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| 167 | & + e2t(ji ,jj-1) * wght(ji,jj,2,1) & |
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| 168 | & + e2t(ji-1,jj-1) * wght(ji,jj,1,1) |
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| 169 | |
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[58] | 170 | ! better written but change the last digit and thus solver in less than 100 timestep |
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[3] | 171 | ! zh1p = e1t(ji-1,jj ) * wght(ji,jj,1,2) + e1t(ji,jj ) * wght(ji,jj,2,2) & |
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| 172 | ! & + e1t(ji-1,jj-1) * wght(ji,jj,1,1) + e1t(ji,jj-1) * wght(ji,jj,2,1) |
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| 173 | |
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| 174 | ! zh2p = e2t(ji-1,jj ) * wght(ji,jj,1,2) + e2t(ji,jj ) * wght(ji,jj,2,2) & |
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| 175 | ! & + e2t(ji-1,jj-1) * wght(ji,jj,1,1) + e2t(ji,jj-1) * wght(ji,jj,2,1) |
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| 176 | |
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[58] | 177 | !!ibug =0 zusden = 1.0 / ( zh1p * zh2p * 4.e0 ) |
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| 178 | zusden = 1.0 / MAX( zh1p * zh2p * 4.e0 , 1.e-20 ) |
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[3] | 179 | zusden2 = zusden * 2.0 |
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| 180 | |
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| 181 | zd1d2p = zusden * 0.5 * ( -e1t(ji-1,jj-1) + e1t(ji-1,jj ) - e1t(ji,jj-1) + e1t(ji ,jj) ) |
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| 182 | zd2d1p = zusden * 0.5 * ( e2t(ji ,jj-1) - e2t(ji-1,jj-1) + e2t(ji,jj ) - e2t(ji-1,jj) ) |
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| 183 | |
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| 184 | alambd(ji,jj,2,2,2,1) = zusden2 * e2t(ji ,jj-1) |
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| 185 | alambd(ji,jj,2,2,2,2) = zusden2 * e2t(ji ,jj ) |
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| 186 | alambd(ji,jj,2,2,1,1) = zusden2 * e2t(ji-1,jj-1) |
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| 187 | alambd(ji,jj,2,2,1,2) = zusden2 * e2t(ji-1,jj ) |
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| 188 | |
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| 189 | alambd(ji,jj,1,1,2,1) = zusden2 * e1t(ji ,jj-1) |
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| 190 | alambd(ji,jj,1,1,2,2) = zusden2 * e1t(ji ,jj ) |
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| 191 | alambd(ji,jj,1,1,1,1) = zusden2 * e1t(ji-1,jj-1) |
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| 192 | alambd(ji,jj,1,1,1,2) = zusden2 * e1t(ji-1,jj ) |
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| 193 | |
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| 194 | alambd(ji,jj,1,2,2,1) = zd1d2p |
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| 195 | alambd(ji,jj,1,2,2,2) = zd1d2p |
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| 196 | alambd(ji,jj,1,2,1,1) = zd1d2p |
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| 197 | alambd(ji,jj,1,2,1,2) = zd1d2p |
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| 198 | |
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| 199 | alambd(ji,jj,2,1,2,1) = zd2d1p |
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| 200 | alambd(ji,jj,2,1,2,2) = zd2d1p |
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| 201 | alambd(ji,jj,2,1,1,1) = zd2d1p |
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| 202 | alambd(ji,jj,2,1,1,2) = zd2d1p |
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| 203 | END DO |
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| 204 | END DO |
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| 205 | |
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| 206 | 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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| 207 | CALL lbc_lnk( alambd(:,:,2,2,2,2), 'I', 1. ) ! the value of wght at jpj is wrong |
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| 208 | CALL lbc_lnk( alambd(:,:,2,2,1,1), 'I', 1. ) ! but it is never used |
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| 209 | CALL lbc_lnk( alambd(:,:,2,2,1,2), 'I', 1. ) ! |
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| 210 | |
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| 211 | CALL lbc_lnk( alambd(:,:,1,1,2,1), 'I', 1. ) ! CAUTION: idem |
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| 212 | CALL lbc_lnk( alambd(:,:,1,1,2,2), 'I', 1. ) ! |
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| 213 | CALL lbc_lnk( alambd(:,:,1,1,1,1), 'I', 1. ) ! |
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| 214 | CALL lbc_lnk( alambd(:,:,1,1,1,2), 'I', 1. ) ! |
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| 215 | |
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| 216 | CALL lbc_lnk( alambd(:,:,1,2,2,1), 'I', 1. ) ! CAUTION: idem |
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| 217 | CALL lbc_lnk( alambd(:,:,1,2,2,2), 'I', 1. ) ! |
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| 218 | CALL lbc_lnk( alambd(:,:,1,2,1,1), 'I', 1. ) ! |
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| 219 | CALL lbc_lnk( alambd(:,:,1,2,1,2), 'I', 1. ) ! |
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| 220 | |
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| 221 | CALL lbc_lnk( alambd(:,:,2,1,2,1), 'I', 1. ) ! CAUTION: idem |
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| 222 | CALL lbc_lnk( alambd(:,:,2,1,2,2), 'I', 1. ) ! |
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| 223 | CALL lbc_lnk( alambd(:,:,2,1,1,1), 'I', 1. ) ! |
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| 224 | CALL lbc_lnk( alambd(:,:,2,1,1,2), 'I', 1. ) ! |
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| 225 | |
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| 226 | |
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| 227 | ! Initialization of ice masks |
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| 228 | !---------------------------- |
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| 229 | |
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| 230 | tms(:,:) = tmask(:,:,1) ! ice T-point : use surface tmask |
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| 231 | |
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| 232 | !i here we can use umask with a i and j shift of -1,-1 |
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| 233 | tmu(:,1) = 0.e0 |
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| 234 | tmu(1,:) = 0.e0 |
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| 235 | DO jj = 2, jpj ! ice U.V-point: computed from ice T-point mask |
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[1694] | 236 | DO ji = 2, jpim1 ! NO vector opt. |
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[3] | 237 | tmu(ji,jj) = tms(ji,jj) * tms(ji-1,jj) * tms(ji,jj-1) * tms(ji-1,jj-1) |
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| 238 | END DO |
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| 239 | END DO |
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| 240 | |
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| 241 | !--lateral boundary conditions |
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| 242 | CALL lbc_lnk( tmu(:,:), 'I', 1. ) |
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| 243 | |
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| 244 | ! unmasked and masked area of T-grid cell |
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| 245 | area(:,:) = e1t(:,:) * e2t(:,:) |
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| 246 | |
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[821] | 247 | END SUBROUTINE lim_msh_2 |
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[58] | 248 | |
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[3] | 249 | #else |
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[58] | 250 | !!---------------------------------------------------------------------- |
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| 251 | !! Default option Dummy Module NO LIM sea-ice model |
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| 252 | !!---------------------------------------------------------------------- |
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[3] | 253 | CONTAINS |
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[821] | 254 | SUBROUTINE lim_msh_2 ! Dummy routine |
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| 255 | END SUBROUTINE lim_msh_2 |
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[58] | 256 | #endif |
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[3] | 257 | |
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| 258 | !!====================================================================== |
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[821] | 259 | END MODULE limmsh_2 |
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