| 1 | MODULE limistate_2 |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE limistate_2 *** |
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| 4 | !! Initialisation of diagnostics ice variables |
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| 5 | !!====================================================================== |
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| 6 | !! History : 2.0 ! 01-04 (C. Ethe, G. Madec) Original code |
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| 7 | !! ! 04-04 (S. Theetten) initialization from a file |
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| 8 | !! ! 06-07 (S. Masson) IOM to read the restart |
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| 9 | !!-------------------------------------------------------------------- |
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| 10 | #if defined key_lim2 |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! 'key_lim2' : LIM 2.0 sea-ice model |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | !!---------------------------------------------------------------------- |
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| 15 | !! lim_istate_2 : Initialisation of diagnostics ice variables |
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| 16 | !! lim_istate_init_2 : initialization of ice state and namelist read |
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| 17 | !!---------------------------------------------------------------------- |
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| 18 | USE phycst |
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| 19 | USE ocfzpt |
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| 20 | USE oce ! dynamics and tracers variables !!gm used??? |
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| 21 | USE dom_oce !!gm used??? |
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| 22 | USE par_ice_2 ! ice parameters |
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| 23 | USE ice_oce ! ice variables |
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| 24 | USE dom_ice_2 |
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| 25 | USE lbclnk |
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| 26 | USE ice_2 |
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| 27 | USE iom |
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| 28 | USE in_out_manager |
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| 29 | |
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| 30 | IMPLICIT NONE |
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| 31 | PRIVATE |
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| 32 | |
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| 33 | PUBLIC lim_istate_2 ! routine called by lim_init_2.F90 |
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| 34 | |
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| 35 | REAL(wp) :: & !!! ** init namelist (namiceini) ** |
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| 36 | ttest = 2.0 , & ! threshold water temperature for initial sea ice |
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| 37 | hninn = 0.5 , & ! initial snow thickness in the north |
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| 38 | hginn = 3.0 , & ! initial ice thickness in the north |
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| 39 | alinn = 0.05 , & ! initial leads area in the north |
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| 40 | hnins = 0.1 , & ! initial snow thickness in the south |
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| 41 | hgins = 1.0 , & ! initial ice thickness in the south |
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| 42 | alins = 0.1 ! initial leads area in the south |
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| 43 | |
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| 44 | REAL(wp) :: & ! constant values |
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| 45 | zzero = 0.e0 , & |
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| 46 | zone = 1.e0 |
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| 47 | !!---------------------------------------------------------------------- |
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| 48 | !! LIM 2.0, UCL-LOCEAN-IPSL (2006) |
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| 49 | !! $Header$ |
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| 50 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 51 | !!---------------------------------------------------------------------- |
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| 52 | |
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| 53 | CONTAINS |
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| 54 | |
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| 55 | SUBROUTINE lim_istate_2 |
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| 56 | !!------------------------------------------------------------------- |
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| 57 | !! *** ROUTINE lim_istate_2 *** |
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| 58 | !! |
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| 59 | !! ** Purpose : defined the sea-ice initial state |
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| 60 | !! |
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| 61 | !! ** Method : restart from a state defined in a binary file |
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| 62 | !! or from arbitrary sea-ice conditions |
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| 63 | !!-------------------------------------------------------------------- |
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| 64 | INTEGER :: ji, jj, jk ! dummy loop indices |
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| 65 | REAL(wp) :: zidto, zs0, ztf, zbin ! temporary scalar |
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| 66 | REAL(wp), DIMENSION(jpi,jpj) :: ztn ! workspace |
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| 67 | !-------------------------------------------------------------------- |
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| 68 | |
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| 69 | CALL lim_istate_init_2 ! 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 | IF( ln_limini ) THEN ! |
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| 76 | |
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| 77 | ! Initialisation at tn if no ice or sst_ini if ice |
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| 78 | ! Idem for salinity |
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| 79 | |
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| 80 | !--- Criterion for presence (zidto=1.) or absence (zidto=0.) of ice |
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| 81 | DO jj = 1 , jpj |
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| 82 | DO ji = 1 , jpi |
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| 83 | |
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| 84 | zidto = MAX(zzero, - SIGN(1.,frld(ji,jj) - 1.)) |
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| 85 | |
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| 86 | sst_io(ji,jj) = ( nfice - 1 ) * (zidto * sst_ini(ji,jj) + & ! use the ocean initial values |
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| 87 | & (1.0 - zidto ) * ( tn(ji,jj,1) + rt0 )) ! tricky trick *(nfice-1) ! |
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| 88 | sss_io(ji,jj) = ( nfice - 1 ) * (zidto * sss_ini(ji,jj) + & |
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| 89 | & (1.0 - zidto ) * sn(ji,jj,1) ) |
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| 90 | |
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| 91 | ! to avoid the the melting of ice, several layers (mixed layer) should be |
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| 92 | ! set to sst_ini (sss_ini) if there is ice |
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| 93 | ! example for one layer |
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| 94 | ! tn(ji,jj,1) = zidto * ( sst_ini(ji,jj) - rt0 ) + (1.0 - zidto ) * tn(ji,jj,1) |
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| 95 | ! sn(ji,jj,1) = zidto * sss_ini(ji,jj) + (1.0 - zidto ) * sn(ji,jj,1) |
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| 96 | ! tb(ji,jj,1) = tn(ji,jj,1) |
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| 97 | ! sb(ji,jj,1) = sn(ji,jj,1) |
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| 98 | END DO |
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| 99 | END DO |
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| 100 | |
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| 101 | |
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| 102 | ! tfu: Melting point of sea water |
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| 103 | tfu(:,:) = ztf |
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| 104 | |
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| 105 | tfu(:,:) = ABS ( rt0 - 0.0575 * sss_ini(:,:) & |
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| 106 | & + 1.710523e-03 * sss_ini(:,:) * SQRT( sss_ini(:,:) ) & |
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| 107 | & - 2.154996e-04 * sss_ini(:,:) * sss_ini(:,:) ) |
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| 108 | ELSE ! |
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| 109 | |
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| 110 | |
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| 111 | ! Initialisation at tn or -2 if ice |
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| 112 | DO jj = 1, jpj |
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| 113 | DO ji = 1, jpi |
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| 114 | zbin = MAX( 0., SIGN( 1., fzptn(ji,jj) - tn(ji,jj,1) ) ) |
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| 115 | ztn(ji,jj) = ( (1.-zbin) * tn(ji,jj,1) - 2. * zbin + rt0 ) * tmask(ji,jj,1) |
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| 116 | END DO |
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| 117 | END DO |
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| 118 | |
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| 119 | u_io (:,:) = 0.e0 |
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| 120 | v_io (:,:) = 0.e0 |
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| 121 | sst_io(:,:) = ( nfice - 1 ) * ( tn(:,:,1) + rt0 ) ! use the ocean initial values |
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| 122 | sss_io(:,:) = ( nfice - 1 ) * sn(:,:,1) ! tricky trick *(nfice-1) ! |
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| 123 | |
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| 124 | ! reference salinity 34psu |
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| 125 | zs0 = 34.e0 |
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| 126 | ztf = ABS ( rt0 - 0.0575 * zs0 & |
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| 127 | & + 1.710523e-03 * zs0 * SQRT( zs0 ) & |
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| 128 | & - 2.154996e-04 * zs0 *zs0 ) |
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| 129 | |
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| 130 | ! tfu: Melting point of sea water |
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| 131 | tfu(:,:) = ztf |
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| 132 | |
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| 133 | DO jj = 1, jpj |
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| 134 | DO ji = 1, jpi |
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| 135 | !--- Criterion for presence (zidto=1) or absence (zidto=0) of ice |
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| 136 | zidto = tms(ji,jj) * ( 1.0 - MAX(zzero, SIGN( zone, ztn(ji,jj) - tfu(ji,jj) - ttest) ) ) |
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| 137 | |
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| 138 | IF( fcor(ji,jj) >= 0.e0 ) THEN !-- Northern hemisphere. |
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| 139 | hicif(ji,jj) = zidto * hginn |
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| 140 | frld(ji,jj) = zidto * alinn + ( 1.0 - zidto ) * 1.0 |
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| 141 | hsnif(ji,jj) = zidto * hninn |
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| 142 | ELSE !--- Southern hemisphere. |
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| 143 | hicif(ji,jj) = zidto * hgins |
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| 144 | frld(ji,jj) = zidto * alins + ( 1.0 - zidto ) * 1.0 |
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| 145 | hsnif(ji,jj) = zidto * hnins |
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| 146 | ENDIF |
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| 147 | END DO |
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| 148 | END DO |
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| 149 | |
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| 150 | sist (:,:) = tfu(:,:) |
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| 151 | tbif (:,:,1) = tfu(:,:) |
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| 152 | tbif (:,:,2) = tfu(:,:) |
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| 153 | tbif (:,:,3) = tfu(:,:) |
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| 154 | |
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| 155 | ENDIF |
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| 156 | fsbbq (:,:) = 0.e0 |
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| 157 | qstoif(:,:) = 0.e0 |
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| 158 | u_ice (:,:) = 0.e0 |
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| 159 | v_ice (:,:) = 0.e0 |
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| 160 | # if defined key_coupled |
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| 161 | albege(:,:) = 0.8 * tms(:,:) |
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| 162 | # endif |
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| 163 | |
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| 164 | !--- Moments for advection. |
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| 165 | |
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| 166 | sxice (:,:) = 0.e0 ; sxsn (:,:) = 0.e0 ; sxa (:,:) = 0.e0 |
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| 167 | syice (:,:) = 0.e0 ; sysn (:,:) = 0.e0 ; sya (:,:) = 0.e0 |
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| 168 | sxxice(:,:) = 0.e0 ; sxxsn(:,:) = 0.e0 ; sxxa (:,:) = 0.e0 |
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| 169 | syyice(:,:) = 0.e0 ; syysn(:,:) = 0.e0 ; syya (:,:) = 0.e0 |
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| 170 | sxyice(:,:) = 0.e0 ; sxysn(:,:) = 0.e0 ; sxya (:,:) = 0.e0 |
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| 171 | |
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| 172 | sxc0 (:,:) = 0.e0 ; sxc1 (:,:) = 0.e0 ; sxc2 (:,:) = 0.e0 |
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| 173 | syc0 (:,:) = 0.e0 ; syc1 (:,:) = 0.e0 ; syc2 (:,:) = 0.e0 |
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| 174 | sxxc0 (:,:) = 0.e0 ; sxxc1(:,:) = 0.e0 ; sxxc2(:,:) = 0.e0 |
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| 175 | syyc0 (:,:) = 0.e0 ; syyc1(:,:) = 0.e0 ; syyc2(:,:) = 0.e0 |
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| 176 | sxyc0 (:,:) = 0.e0 ; sxyc1(:,:) = 0.e0 ; sxyc2(:,:) = 0.e0 |
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| 177 | |
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| 178 | sxst (:,:) = 0.e0 |
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| 179 | syst (:,:) = 0.e0 |
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| 180 | sxxst (:,:) = 0.e0 |
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| 181 | syyst (:,:) = 0.e0 |
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| 182 | sxyst (:,:) = 0.e0 |
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| 183 | |
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| 184 | !-- lateral boundary conditions |
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| 185 | CALL lbc_lnk( hicif, 'T', 1. ) |
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| 186 | CALL lbc_lnk( frld , 'T', 1. ) |
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| 187 | |
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| 188 | ! C A U T I O N frld = 1 over land and lbc_lnk put zero along |
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| 189 | ! ************* closed boundaries herefore we force to one over land |
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| 190 | frld(:,:) = tms(:,:) * frld(:,:) + ( 1. - tms(:,:) ) |
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| 191 | |
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| 192 | CALL lbc_lnk( hsnif, 'T', 1. ) |
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| 193 | CALL lbc_lnk( sist , 'T', 1. ) |
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| 194 | DO jk = 1, jplayersp1 |
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| 195 | CALL lbc_lnk(tbif(:,:,jk), 'T', 1. ) |
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| 196 | END DO |
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| 197 | CALL lbc_lnk( fsbbq , 'T', 1. ) |
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| 198 | CALL lbc_lnk( qstoif , 'T', 1. ) |
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| 199 | CALL lbc_lnk( sss_io , 'T', 1. ) |
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| 200 | ! |
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| 201 | END SUBROUTINE lim_istate_2 |
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| 202 | |
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| 203 | |
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| 204 | SUBROUTINE lim_istate_init_2 |
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| 205 | !!------------------------------------------------------------------- |
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| 206 | !! *** ROUTINE lim_istate_init_2 *** |
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| 207 | !! |
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| 208 | !! ** Purpose : Definition of initial state of the ice |
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| 209 | !! |
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| 210 | !! ** Method : Read the namiceini namelist and check the parameter |
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| 211 | !! values called at the first timestep (nit000) |
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| 212 | !! or |
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| 213 | !! Read 7 variables from a previous restart file |
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| 214 | !! sst, sst, hicif, hsnif, frld, ts & tbif |
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| 215 | !! |
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| 216 | !! ** input : Namelist namiceini |
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| 217 | !!------------------------------------------------------------------- |
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| 218 | INTEGER :: inum_ice |
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| 219 | INTEGER :: ji,jj |
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| 220 | |
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| 221 | NAMELIST/namiceini/ ln_limini, ttest, hninn, hginn, alinn, & |
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| 222 | & hnins, hgins, alins |
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| 223 | !!------------------------------------------------------------------- |
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| 224 | |
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| 225 | ! Read Namelist namiceini |
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| 226 | REWIND ( numnam_ice ) |
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| 227 | READ ( numnam_ice , namiceini ) |
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| 228 | |
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| 229 | IF(.NOT. ln_limini) THEN |
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| 230 | IF(lwp) THEN |
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| 231 | WRITE(numout,*) |
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| 232 | WRITE(numout,*) 'lim_istate_init : ice parameters inititialisation ' |
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| 233 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
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| 234 | WRITE(numout,*) ' threshold water temp. for initial sea-ice ttest = ', ttest |
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| 235 | WRITE(numout,*) ' initial snow thickness in the north hninn = ', hninn |
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| 236 | WRITE(numout,*) ' initial ice thickness in the north hginn = ', hginn |
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| 237 | WRITE(numout,*) ' initial leads area in the north alinn = ', alinn |
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| 238 | WRITE(numout,*) ' initial snow thickness in the south hnins = ', hnins |
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| 239 | WRITE(numout,*) ' initial ice thickness in the south hgins = ', hgins |
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| 240 | WRITE(numout,*) ' initial leads area in the south alins = ', alins |
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| 241 | ENDIF |
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| 242 | ENDIF |
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| 243 | |
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| 244 | IF( ln_limini ) THEN ! Ice initialization using input file |
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| 245 | |
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| 246 | CALL iom_open( 'Ice_initialization.nc', inum_ice ) |
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| 247 | |
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| 248 | IF( inum_ice > 0 ) THEN |
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| 249 | IF(lwp) THEN |
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| 250 | WRITE(numout,*) ' ' |
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| 251 | WRITE(numout,*) 'lim_istate_init : ice state initialization with : Ice_initialization.nc' |
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| 252 | WRITE(numout,*) '~~~~~~~~~~~~~~~' |
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| 253 | WRITE(numout,*) ' Ice state initialization using input file ln_limini = ', ln_limini |
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| 254 | WRITE(numout,*) ' ' |
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| 255 | ENDIF |
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| 256 | |
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| 257 | CALL iom_get( inum_ice, jpdom_data, 'sst' , sst_ini(:,:) ) |
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| 258 | CALL iom_get( inum_ice, jpdom_data, 'sss' , sss_ini(:,:) ) |
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| 259 | CALL iom_get( inum_ice, jpdom_data, 'hicif', hicif (:,:) ) |
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| 260 | CALL iom_get( inum_ice, jpdom_data, 'hsnif', hsnif (:,:) ) |
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| 261 | CALL iom_get( inum_ice, jpdom_data, 'frld' , frld (:,:) ) |
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| 262 | CALL iom_get( inum_ice, jpdom_data, 'ts' , sist (:,:) ) |
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| 263 | CALL iom_get( inum_ice, jpdom_unknown, 'tbif', tbif(1:nlci,1:nlcj,:), & |
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| 264 | & kstart = (/ mig(1),mjg(1),1 /), kcount = (/ nlci,nlcj,jplayersp1 /) ) |
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| 265 | ! put some values in the extra-halo... |
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| 266 | DO jj = nlcj+1, jpj ; tbif(1:nlci,jj,:) = tbif(1:nlci,nlej,:) ; END DO |
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| 267 | DO ji = nlci+1, jpi ; tbif(ji ,: ,:) = tbif(nlei ,: ,:) ; END DO |
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| 268 | |
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| 269 | CALL iom_close( inum_ice) |
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| 270 | |
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| 271 | ENDIF |
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| 272 | ENDIF |
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| 273 | ! |
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| 274 | END SUBROUTINE lim_istate_init_2 |
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| 275 | |
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| 276 | #else |
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| 277 | !!---------------------------------------------------------------------- |
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| 278 | !! Default option : Empty module NO LIM 2.0 sea-ice model |
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| 279 | !!---------------------------------------------------------------------- |
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| 280 | CONTAINS |
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| 281 | SUBROUTINE lim_istate_2 ! Empty routine |
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| 282 | END SUBROUTINE lim_istate_2 |
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| 283 | #endif |
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| 284 | |
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| 285 | !!====================================================================== |
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| 286 | END MODULE limistate_2 |
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