[3] | 1 | MODULE limmsh |
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| 2 | #if defined key_ice_lim |
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| 3 | !!====================================================================== |
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| 4 | !! *** MODULE limmsh *** |
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[12] | 5 | !! LIM ice model : definition of the ice mesh parameters |
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[3] | 6 | !!====================================================================== |
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| 7 | |
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| 8 | !!---------------------------------------------------------------------- |
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| 9 | !! lim_msh : definition of the ice mesh |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | !! * Modules used |
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| 12 | USE phycst |
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| 13 | USE dom_oce |
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| 14 | USE dom_ice |
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| 15 | USE lbclnk |
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| 16 | |
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| 17 | IMPLICIT NONE |
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| 18 | PRIVATE |
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| 19 | |
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| 20 | !! * Accessibility |
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| 21 | PUBLIC lim_msh ! routine called by ice_ini.F90 |
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| 22 | |
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| 23 | !!---------------------------------------------------------------------- |
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| 24 | !! LIM 2.0 , UCL-LODYC-IPSL (2003) |
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| 25 | !!---------------------------------------------------------------------- |
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| 26 | |
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| 27 | CONTAINS |
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| 28 | |
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| 29 | SUBROUTINE lim_msh |
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| 30 | !!------------------------------------------------------------------- |
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| 31 | !! *** ROUTINE lim_msh *** |
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| 32 | !! |
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| 33 | !! ** Purpose : Definition of the charact. of the numerical grid |
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| 34 | !! |
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| 35 | !! ** Action : - Initialisation of some variables |
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| 36 | !! - Definition of some constants linked with the grid |
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| 37 | !! - Definition of the metric coef. for the sea/ice |
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| 38 | !! - Initialization of the ice masks (tmsk, umsk) |
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| 39 | !! |
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| 40 | !! ** Refer. : Deleersnijder et al. Ocean Modelling 100, 7-10 |
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| 41 | !! |
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| 42 | !! ** History : |
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| 43 | !! original : 01-04 (LIM) |
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| 44 | !! addition : 02-08 (C. Ethe, G. Madec) |
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| 45 | !!--------------------------------------------------------------------- |
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| 46 | !! * Local variables |
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[12] | 47 | INTEGER :: ji, jj ! dummy loop indices |
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[3] | 48 | |
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| 49 | REAL(wp), DIMENSION(jpi,jpj) :: & |
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[12] | 50 | zd2d1 , zd1d2 ! Derivative of zh2 (resp. zh1) in the x direction |
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| 51 | ! ! (resp. y direction) (defined at the center) |
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[3] | 52 | REAL(wp) :: & |
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[12] | 53 | zh1p , zh2p , & ! Idem zh1, zh2 for the bottom left corner of the grid |
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| 54 | zd2d1p, zd1d2p, & ! Idem zd2d1, zd1d2 for the bottom left corner of the grid |
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| 55 | zusden, zusden2, & ! temporary scalars |
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| 56 | zaire4 ! " " |
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[3] | 57 | !!--------------------------------------------------------------------- |
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| 58 | !! LIM 2.0, UCL-LODYC-IPSL (2002) |
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| 59 | !!--------------------------------------------------------------------- |
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| 60 | |
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| 61 | !---------------------------------------------------------- |
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| 62 | ! Initialization of local and some global (common) variables |
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| 63 | !------------------------------------------------------------------ |
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| 64 | |
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| 65 | jeq = INT( jpj / 2 ) !i bug mpp potentiel |
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| 66 | jeqm1 = jeq - 1 |
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| 67 | |
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| 68 | fcor(:,:) = 2. * omega * SIN( gphit(:,:) * rad ) ! coriolis factor |
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| 69 | |
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| 70 | |
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| 71 | ! For each grid, definition of geometric tables |
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| 72 | !------------------------------------------------------------------ |
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| 73 | |
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| 74 | !------------------- |
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| 75 | ! Conventions : | |
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| 76 | !------------------- |
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| 77 | ! indices 1 \ 2 <-> localisation in the 2 direction x \ y |
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| 78 | ! 3rd indice <-> localisation on the mesh : |
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| 79 | ! 0 = Centre ; 1 = corner W x(i-1/2) ; 2 = corner S y(j-1/2) ; |
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| 80 | ! 3 = corner SW x(i-1/2),y(j-1/2) |
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| 81 | !------------------- |
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| 82 | |
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| 83 | |
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| 84 | ! metric coefficients for sea ice dynamic |
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| 85 | !---------------------------------------- |
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| 86 | ! ! akappa |
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[12] | 87 | DO jj = 2, jpj |
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| 88 | DO ji = 1, jpi |
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[3] | 89 | zd1d2(ji,jj) = e1v(ji,jj) - e1v(ji,jj-1) |
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| 90 | END DO |
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| 91 | END DO |
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[12] | 92 | CALL lbc_lnk( zd1d2, 'T', -1. ) |
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[3] | 93 | |
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[12] | 94 | DO jj = 1, jpj |
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| 95 | DO ji = 2, jpi |
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[3] | 96 | zd2d1(ji,jj) = e2u(ji,jj) - e2u(ji-1,jj) |
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| 97 | END DO |
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| 98 | END DO |
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[12] | 99 | CALL lbc_lnk( zd2d1, 'T', -1. ) |
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[3] | 100 | |
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[12] | 101 | DO jj = 1, jpj |
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| 102 | DO ji = 1, jpi |
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[3] | 103 | zaire4 = 4.0 * e1t(ji,jj) * e2t(ji,jj) |
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| 104 | akappa(ji,jj,1,1) = 1.0 / ( 2.0 * e1t(ji,jj) ) |
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| 105 | akappa(ji,jj,1,2) = zd1d2(ji,jj) / zaire4 |
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| 106 | akappa(ji,jj,2,1) = zd2d1(ji,jj) / zaire4 |
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| 107 | akappa(ji,jj,2,2) = 1.0 / ( 2.0 * e2t(ji,jj) ) |
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| 108 | END DO |
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| 109 | END DO |
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| 110 | |
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| 111 | ! ! weights (wght) |
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[12] | 112 | DO jj = 2, jpj |
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| 113 | DO ji = 2, jpi |
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[3] | 114 | zusden = 1. / ( ( e1t(ji,jj) + e1t(ji-1,jj ) ) & |
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| 115 | & * ( e2t(ji,jj) + e2t(ji ,jj-1) ) ) |
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| 116 | wght(ji,jj,1,1) = zusden * e1t(ji ,jj) * e2t(ji,jj ) |
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| 117 | wght(ji,jj,1,2) = zusden * e1t(ji ,jj) * e2t(ji,jj-1) |
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| 118 | wght(ji,jj,2,1) = zusden * e1t(ji-1,jj) * e2t(ji,jj ) |
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| 119 | wght(ji,jj,2,2) = zusden * e1t(ji-1,jj) * e2t(ji,jj-1) |
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| 120 | END DO |
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| 121 | END DO |
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| 122 | CALL lbc_lnk( wght(:,:,1,1), 'I', 1. ) ! CAUTION: even with the lbc_lnk at ice U-V-point |
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| 123 | CALL lbc_lnk( wght(:,:,1,2), 'I', 1. ) ! the value of wght at jpj is wrong |
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| 124 | CALL lbc_lnk( wght(:,:,2,1), 'I', 1. ) ! but it is never used |
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| 125 | CALL lbc_lnk( wght(:,:,2,2), 'I', 1. ) |
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| 126 | |
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| 127 | ! Coefficients for divergence of the stress tensor |
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| 128 | !------------------------------------------------- |
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| 129 | |
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[12] | 130 | DO jj = 2, jpj |
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| 131 | DO ji = 2, jpi |
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[3] | 132 | zh1p = e1t(ji ,jj ) * wght(ji,jj,2,2) & |
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| 133 | & + e1t(ji-1,jj ) * wght(ji,jj,1,2) & |
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| 134 | & + e1t(ji ,jj-1) * wght(ji,jj,2,1) & |
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| 135 | & + e1t(ji-1,jj-1) * wght(ji,jj,1,1) |
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| 136 | |
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| 137 | zh2p = e2t(ji ,jj ) * wght(ji,jj,2,2) & |
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| 138 | & + e2t(ji-1,jj ) * wght(ji,jj,1,2) & |
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| 139 | & + e2t(ji ,jj-1) * wght(ji,jj,2,1) & |
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| 140 | & + e2t(ji-1,jj-1) * wght(ji,jj,1,1) |
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| 141 | |
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| 142 | ! better writen but change the last digit and thus solver in less than 100 timestep |
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| 143 | ! zh1p = e1t(ji-1,jj ) * wght(ji,jj,1,2) + e1t(ji,jj ) * wght(ji,jj,2,2) & |
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| 144 | ! & + e1t(ji-1,jj-1) * wght(ji,jj,1,1) + e1t(ji,jj-1) * wght(ji,jj,2,1) |
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| 145 | |
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| 146 | ! zh2p = e2t(ji-1,jj ) * wght(ji,jj,1,2) + e2t(ji,jj ) * wght(ji,jj,2,2) & |
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| 147 | ! & + e2t(ji-1,jj-1) * wght(ji,jj,1,1) + e2t(ji,jj-1) * wght(ji,jj,2,1) |
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| 148 | |
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| 149 | zusden = 1.0 / ( zh1p * zh2p * 4.e0 ) |
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| 150 | zusden2 = zusden * 2.0 |
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| 151 | |
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| 152 | zd1d2p = zusden * 0.5 * ( -e1t(ji-1,jj-1) + e1t(ji-1,jj ) - e1t(ji,jj-1) + e1t(ji ,jj) ) |
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| 153 | zd2d1p = zusden * 0.5 * ( e2t(ji ,jj-1) - e2t(ji-1,jj-1) + e2t(ji,jj ) - e2t(ji-1,jj) ) |
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| 154 | |
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| 155 | alambd(ji,jj,2,2,2,1) = zusden2 * e2t(ji ,jj-1) |
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| 156 | alambd(ji,jj,2,2,2,2) = zusden2 * e2t(ji ,jj ) |
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| 157 | alambd(ji,jj,2,2,1,1) = zusden2 * e2t(ji-1,jj-1) |
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| 158 | alambd(ji,jj,2,2,1,2) = zusden2 * e2t(ji-1,jj ) |
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| 159 | |
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| 160 | alambd(ji,jj,1,1,2,1) = zusden2 * e1t(ji ,jj-1) |
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| 161 | alambd(ji,jj,1,1,2,2) = zusden2 * e1t(ji ,jj ) |
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| 162 | alambd(ji,jj,1,1,1,1) = zusden2 * e1t(ji-1,jj-1) |
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| 163 | alambd(ji,jj,1,1,1,2) = zusden2 * e1t(ji-1,jj ) |
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| 164 | |
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| 165 | alambd(ji,jj,1,2,2,1) = zd1d2p |
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| 166 | alambd(ji,jj,1,2,2,2) = zd1d2p |
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| 167 | alambd(ji,jj,1,2,1,1) = zd1d2p |
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| 168 | alambd(ji,jj,1,2,1,2) = zd1d2p |
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| 169 | |
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| 170 | alambd(ji,jj,2,1,2,1) = zd2d1p |
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| 171 | alambd(ji,jj,2,1,2,2) = zd2d1p |
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| 172 | alambd(ji,jj,2,1,1,1) = zd2d1p |
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| 173 | alambd(ji,jj,2,1,1,2) = zd2d1p |
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| 174 | END DO |
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| 175 | END DO |
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| 176 | |
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| 177 | 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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| 178 | CALL lbc_lnk( alambd(:,:,2,2,2,2), 'I', 1. ) ! the value of wght at jpj is wrong |
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| 179 | CALL lbc_lnk( alambd(:,:,2,2,1,1), 'I', 1. ) ! but it is never used |
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| 180 | CALL lbc_lnk( alambd(:,:,2,2,1,2), 'I', 1. ) ! |
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| 181 | |
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| 182 | CALL lbc_lnk( alambd(:,:,1,1,2,1), 'I', 1. ) ! CAUTION: idem |
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| 183 | CALL lbc_lnk( alambd(:,:,1,1,2,2), 'I', 1. ) ! |
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| 184 | CALL lbc_lnk( alambd(:,:,1,1,1,1), 'I', 1. ) ! |
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| 185 | CALL lbc_lnk( alambd(:,:,1,1,1,2), 'I', 1. ) ! |
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| 186 | |
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| 187 | CALL lbc_lnk( alambd(:,:,1,2,2,1), 'I', 1. ) ! CAUTION: idem |
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| 188 | CALL lbc_lnk( alambd(:,:,1,2,2,2), 'I', 1. ) ! |
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| 189 | CALL lbc_lnk( alambd(:,:,1,2,1,1), 'I', 1. ) ! |
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| 190 | CALL lbc_lnk( alambd(:,:,1,2,1,2), 'I', 1. ) ! |
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| 191 | |
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| 192 | CALL lbc_lnk( alambd(:,:,2,1,2,1), 'I', 1. ) ! CAUTION: idem |
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| 193 | CALL lbc_lnk( alambd(:,:,2,1,2,2), 'I', 1. ) ! |
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| 194 | CALL lbc_lnk( alambd(:,:,2,1,1,1), 'I', 1. ) ! |
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| 195 | CALL lbc_lnk( alambd(:,:,2,1,1,2), 'I', 1. ) ! |
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| 196 | |
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| 197 | ! Definition of scale dephts : bathymetry |
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| 198 | !------------------------------------------- |
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| 199 | !i bug dz forced to 10 meters |
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| 200 | dz = 10 !!bug potential bug if first level not equal to 10 m |
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| 201 | !!! dz = gdept(1) |
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| 202 | |
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| 203 | |
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| 204 | ! Initialization of ice masks |
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| 205 | !---------------------------- |
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| 206 | |
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| 207 | tms(:,:) = tmask(:,:,1) ! ice T-point : use surface tmask |
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| 208 | |
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| 209 | !i here we can use umask with a i and j shift of -1,-1 |
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| 210 | tmu(:,1) = 0.e0 |
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| 211 | tmu(1,:) = 0.e0 |
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| 212 | DO jj = 2, jpj ! ice U.V-point: computed from ice T-point mask |
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[12] | 213 | DO ji = 2, jpim1 |
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[3] | 214 | tmu(ji,jj) = tms(ji,jj) * tms(ji-1,jj) * tms(ji,jj-1) * tms(ji-1,jj-1) |
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| 215 | END DO |
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| 216 | END DO |
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| 217 | |
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| 218 | !--lateral boundary conditions |
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| 219 | CALL lbc_lnk( tmu(:,:), 'I', 1. ) |
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| 220 | |
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| 221 | ! unmasked and masked area of T-grid cell |
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| 222 | area(:,:) = e1t(:,:) * e2t(:,:) |
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| 223 | aire(:,:) = area(:,:) * tms(:,:) |
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| 224 | |
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| 225 | END SUBROUTINE lim_msh |
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| 226 | #else |
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| 227 | !!============================================================================== |
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| 228 | !! *** MODULE limmsh *** |
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| 229 | !! No sea ice |
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| 230 | !!============================================================================== |
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| 231 | CONTAINS |
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| 232 | SUBROUTINE lim_msh ! Empty routine |
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| 233 | END SUBROUTINE lim_msh |
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| 234 | |
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| 235 | #endif |
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| 236 | !!====================================================================== |
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| 237 | END MODULE limmsh |
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