[3] | 1 | MODULE limistate |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE limistate *** |
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| 4 | !! Initialisation of diagnostics ice variables |
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| 5 | !!====================================================================== |
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| 6 | #if defined key_ice_lim |
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| 7 | !!---------------------------------------------------------------------- |
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| 8 | !! 'key_ice_lim' : LIM sea-ice model |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | !! lim_istate : Initialisation of diagnostics ice variables |
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| 11 | !! lim_istate_init : initialization of ice state and namelist read |
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| 12 | !!---------------------------------------------------------------------- |
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| 13 | !! * Modules used |
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| 14 | USE phycst |
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| 15 | USE ocfzpt |
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| 16 | USE oce ! dynamics and tracers variables |
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| 17 | USE dom_oce |
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| 18 | USE ice_oce ! ice variables |
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| 19 | USE in_out_manager |
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| 20 | USE dom_ice |
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| 21 | USE ice |
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| 22 | USE lbclnk |
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| 23 | |
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| 24 | IMPLICIT NONE |
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| 25 | PRIVATE |
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| 26 | |
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| 27 | !! * Accessibility |
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| 28 | PUBLIC lim_istate ! routine called by lim_init.F90 |
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| 29 | |
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| 30 | !! * Module variables |
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| 31 | REAL(wp) :: & !!! ** init namelist (namiceini) ** |
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| 32 | ttest = 2.0 , & ! threshold water temperature for initial sea ice |
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| 33 | hninn = 0.5 , & ! initial snow thickness in the north |
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| 34 | hginn = 3.0 , & ! initial ice thickness in the north |
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| 35 | alinn = 0.05 , & ! initial leads area in the north |
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| 36 | hnins = 0.1 , & ! initial snow thickness in the south |
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| 37 | hgins = 1.0 , & ! initial ice thickness in the south |
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| 38 | alins = 0.1 ! initial leads area in the south |
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| 39 | |
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| 40 | REAL(wp) :: & ! constant values |
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| 41 | zzero = 0.0 , & |
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| 42 | zone = 1.0 |
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| 43 | !!---------------------------------------------------------------------- |
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| 44 | !! LIM 2.0 , UCL-LODYC-IPSL (2003) |
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| 45 | !!---------------------------------------------------------------------- |
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| 46 | |
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| 47 | CONTAINS |
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| 48 | |
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| 49 | SUBROUTINE lim_istate |
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| 50 | !!------------------------------------------------------------------- |
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| 51 | !! *** ROUTINE lim_istate *** |
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| 52 | !! Purpose : |
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| 53 | !! restart from a state defined in a binary file and arbitrary sea |
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| 54 | !! ice conditions |
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| 55 | !! |
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| 56 | !! History : |
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| 57 | !! 2.0 ! 01-04 (C. Ethe, G. Madec) Original code |
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| 58 | !!-------------------------------------------------------------------- |
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| 59 | !! * Local variables |
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| 60 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 61 | |
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| 62 | REAL(wp) :: zidto, & ! temporary scalar |
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| 63 | zs0, ztf, zbin |
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| 64 | REAL(wp), DIMENSION(jpi,jpj) :: & |
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| 65 | ztn |
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| 66 | !-------------------------------------------------------------------- |
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| 67 | |
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| 68 | |
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| 69 | CALL lim_istate_init ! reading the initials parameters of the ice |
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| 70 | |
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| 71 | !-- Initialisation of sst,sss,u,v do i=1,jpi |
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| 72 | u_io(:,:) = 0.e0 ! ice velocity in x direction |
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| 73 | v_io(:,:) = 0.e0 ! ice velocity in y direction |
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| 74 | |
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| 75 | ! Initialisation at tn or -2 if ice |
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| 76 | DO jj = 1, jpj |
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| 77 | DO ji = 1, jpi |
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| 78 | zbin = MAX( 0., SIGN( 1., fzptn(ji,jj) - tn(ji,jj,1) ) ) |
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| 79 | ztn(ji,jj) = ( (1.-zbin) * tn(ji,jj,1) - 2. * zbin + rt0 ) * tmask(ji,jj,1) |
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| 80 | END DO |
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| 81 | END DO |
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| 82 | |
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| 83 | |
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| 84 | u_io (:,:) = 0. |
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| 85 | v_io (:,:) = 0. |
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| 86 | sst_io(:,:) = ( nfice - 1 ) * ( tn(:,:,1) + rt0 ) ! use the ocean initial values |
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| 87 | sss_io(:,:) = ( nfice - 1 ) * sn(:,:,1) ! tricky trick *(nfice-1) ! |
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| 88 | |
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| 89 | ! reference salinity 34psu |
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| 90 | zs0 = 34.e0 |
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| 91 | ztf = ABS ( rt0 - 0.0575 * zs0 & |
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| 92 | & + 1.710523e-03 * zs0 * SQRT( zs0 ) & |
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| 93 | & - 2.154996e-04 * zs0 *zs0 ) |
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| 94 | |
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| 95 | ! tfu: Melting point of sea water |
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| 96 | tfu(:,:) = ztf |
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| 97 | |
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| 98 | !-- Northern hemisphere. |
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| 99 | DO jj = jeq , jpj |
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| 100 | DO ji = 1 , jpi |
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| 101 | !--- Criterion for presence (zidto=1) or absence (zidto=0) of ice |
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| 102 | zidto = tms(ji,jj) * ( 1.0 - MAX(zzero, SIGN( zone, ztn(ji,jj) - tfu(ji,jj) - ttest) ) ) |
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| 103 | |
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| 104 | hicif(ji,jj) = zidto * hginn |
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| 105 | frld(ji,jj) = zidto * alinn + ( 1.0 - zidto ) * 1.0 |
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| 106 | hsnif(ji,jj) = zidto * hninn |
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| 107 | ENDDO |
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| 108 | ENDDO |
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| 109 | |
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| 110 | !--- Southern hemisphere. |
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| 111 | DO jj = 1, jeqm1 |
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| 112 | DO ji = 1, jpi |
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| 113 | !--- Criterion for presence (zidto=1) or absence (zidto=0) of ice. |
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| 114 | zidto = tms(ji,jj) * ( 1.0 - MAX(zzero, SIGN( zone, ztn(ji,jj) - tfu(ji,jj) - ttest) ) ) |
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| 115 | |
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| 116 | hicif(ji,jj) = zidto * hgins |
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| 117 | frld(ji,jj) = zidto * alins + ( 1.0 - zidto ) * 1.0 |
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| 118 | hsnif(ji,jj) = zidto * hnins |
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| 119 | ENDDO |
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| 120 | ENDDO |
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| 121 | |
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| 122 | sist (:,:) = tfu(:,:) |
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| 123 | tbif (:,:,1) = tfu(:,:) |
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| 124 | tbif (:,:,2) = tfu(:,:) |
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| 125 | tbif (:,:,3) = tfu(:,:) |
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| 126 | fsbbq (:,:) = 0.e0 |
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| 127 | qstoif(:,:) = 0.e0 |
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| 128 | u_ice (:,:) = 0.e0 |
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| 129 | v_ice (:,:) = 0.e0 |
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| 130 | # if defined key_coupled |
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| 131 | albege(:,:) = 0.8 * tms(:,:) |
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| 132 | # endif |
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| 133 | |
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| 134 | |
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| 135 | !--- Moments for advection. |
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| 136 | |
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| 137 | sxice (:,:) = 0.e0 ; sxsn (:,:) = 0.e0 ; sxa (:,:) = 0.e0 |
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| 138 | syice (:,:) = 0.e0 ; sysn (:,:) = 0.e0 ; sya (:,:) = 0.e0 |
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| 139 | sxxice(:,:) = 0.e0 ; sxxsn(:,:) = 0.e0 ; sxxa (:,:) = 0.e0 |
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| 140 | syyice(:,:) = 0.e0 ; syysn(:,:) = 0.e0 ; syya (:,:) = 0.e0 |
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| 141 | sxyice(:,:) = 0.e0 ; sxysn(:,:) = 0.e0 ; sxya (:,:) = 0.e0 |
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| 142 | |
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| 143 | sxc0 (:,:) = 0.e0 ; sxc1 (:,:) = 0.e0 ; sxc2 (:,:) = 0.e0 |
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| 144 | syc0 (:,:) = 0.e0 ; syc1 (:,:) = 0.e0 ; syc2 (:,:) = 0.e0 |
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| 145 | sxxc0 (:,:) = 0.e0 ; sxxc1(:,:) = 0.e0 ; sxxc2(:,:) = 0.e0 |
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| 146 | syyc0 (:,:) = 0.e0 ; syyc1(:,:) = 0.e0 ; syyc2(:,:) = 0.e0 |
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| 147 | sxyc0 (:,:) = 0.e0 ; sxyc1(:,:) = 0.e0 ; sxyc2(:,:) = 0.e0 |
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| 148 | |
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| 149 | sxst (:,:) = 0.e0 |
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| 150 | syst (:,:) = 0.e0 |
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| 151 | sxxst (:,:) = 0.e0 |
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| 152 | syyst (:,:) = 0.e0 |
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| 153 | sxyst (:,:) = 0.e0 |
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| 154 | |
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| 155 | !-- lateral boundary conditions |
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| 156 | CALL lbc_lnk( hicif, 'T', 1. ) |
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| 157 | CALL lbc_lnk( frld , 'T', 1. ) |
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| 158 | !i bug frld = 1 over land |
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| 159 | frld(:,:) = tms(:,:) * frld(:,:) + ( 1. - tms(:,:) ) ! put 1 over land |
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| 160 | !i |
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| 161 | CALL lbc_lnk( hsnif, 'T', 1. ) |
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| 162 | CALL lbc_lnk( sist , 'T', 1. ) |
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| 163 | DO jk = 1, nlayersp1 |
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| 164 | CALL lbc_lnk(tbif(:,:,jk), 'T', 1. ) |
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| 165 | END DO |
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| 166 | CALL lbc_lnk( fsbbq , 'T', 1. ) |
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| 167 | CALL lbc_lnk( qstoif , 'T', 1. ) |
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| 168 | CALL lbc_lnk( sss_io , 'T', 1. ) |
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| 169 | |
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| 170 | END SUBROUTINE lim_istate |
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| 171 | |
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| 172 | |
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| 173 | SUBROUTINE lim_istate_init |
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| 174 | !!------------------------------------------------------------------- |
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| 175 | !! *** ROUTINE lim_istate_init *** |
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| 176 | !! |
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| 177 | !! ** Purpose : Definition of initial state of the ice |
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| 178 | !! |
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| 179 | !! ** Method : Read the namiceini namelist and check the parameter |
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| 180 | !! values called at the first timestep (nit000) |
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| 181 | !! |
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| 182 | !! ** input : |
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| 183 | !! Namelist namiceini |
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| 184 | !! |
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| 185 | !! history : |
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| 186 | !! 8.5 ! 03-08 (C. Ethe) original code |
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| 187 | !!------------------------------------------------------------------- |
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| 188 | NAMELIST/namiceini/ ttest, hninn, hginn, alinn, hnins, hgins, alins |
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| 189 | !!------------------------------------------------------------------- |
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| 190 | |
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| 191 | ! Define the initial parameters |
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| 192 | ! ------------------------- |
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| 193 | |
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| 194 | ! Read Namelist namiceini |
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| 195 | REWIND ( numnam_ice ) |
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| 196 | READ ( numnam_ice , namiceini ) |
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| 197 | IF(lwp) THEN |
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| 198 | WRITE(numout,*) |
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| 199 | WRITE(numout,*) 'lim_istate_init : ice parameters inititialisation ' |
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| 200 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
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| 201 | WRITE(numout,*) ' threshold water temp. for initial sea-ice ttest = ', ttest |
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| 202 | WRITE(numout,*) ' initial snow thickness in the north hninn = ', hninn |
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| 203 | WRITE(numout,*) ' initial ice thickness in the north hginn = ', hginn |
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| 204 | WRITE(numout,*) ' initial leads area in the north alinn = ', alinn |
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| 205 | WRITE(numout,*) ' initial snow thickness in the south hnins = ', hnins |
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| 206 | WRITE(numout,*) ' initial ice thickness in the south hgins = ', hgins |
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| 207 | WRITE(numout,*) ' initial leads area in the south alins = ', alins |
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| 208 | ENDIF |
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| 209 | |
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| 210 | END SUBROUTINE lim_istate_init |
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| 211 | |
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| 212 | #else |
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| 213 | !!---------------------------------------------------------------------- |
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| 214 | !! Default option : Empty module NO LIM sea-ice model |
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| 215 | !!---------------------------------------------------------------------- |
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| 216 | CONTAINS |
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| 217 | SUBROUTINE lim_istate ! Empty routine |
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| 218 | END SUBROUTINE lim_istate |
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| 219 | #endif |
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| 220 | |
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| 221 | !!====================================================================== |
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| 222 | END MODULE limistate |
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