[8422] | 1 | MODULE iceitd |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE iceitd *** |
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[8534] | 4 | !! sea-ice : ice thickness distribution |
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[8422] | 5 | !!====================================================================== |
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| 6 | !! History : - ! (W. H. Lipscomb and E.C. Hunke) CICE (c) original code |
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| 7 | !! 3.0 ! 2005-12 (M. Vancoppenolle) adaptation to LIM-3 |
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| 8 | !! - ! 2006-06 (M. Vancoppenolle) adaptation to include salt, age |
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| 9 | !! - ! 2007-04 (M. Vancoppenolle) Mass conservation checked |
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| 10 | !!---------------------------------------------------------------------- |
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| 11 | #if defined key_lim3 |
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| 12 | !!---------------------------------------------------------------------- |
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[8534] | 13 | !! 'key_lim3' ESIM sea-ice model |
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[8422] | 14 | !!---------------------------------------------------------------------- |
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[8534] | 15 | !! ice_itd_init : read ice thicknesses mean and min from namelist |
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| 16 | !! ice_itd_rem : redistribute ice thicknesses after thermo growth and melt |
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| 17 | !! ice_itd_reb : rebin ice thicknesses into bounded categories |
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[8422] | 18 | !!---------------------------------------------------------------------- |
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[8486] | 19 | USE dom_oce ! ocean domain |
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| 20 | USE phycst ! physical constants |
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| 21 | USE ice1D ! sea-ice: thermodynamic variables |
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| 22 | USE ice ! sea-ice: variables |
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| 23 | USE icectl ! sea-ice: conservation tests |
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| 24 | USE icetab ! sea-ice: convert 1D<=>2D |
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[8422] | 25 | ! |
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[8486] | 26 | USE in_out_manager ! I/O manager |
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| 27 | USE lib_mpp ! MPP library |
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[8534] | 28 | USE lib_fortran ! fortran utilities (glob_sum + no signed zero) |
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| 29 | USE prtctl ! Print control |
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[8422] | 30 | |
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| 31 | IMPLICIT NONE |
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| 32 | PRIVATE |
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| 33 | |
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[8505] | 34 | PUBLIC ice_itd_init ! called in icestp |
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[8422] | 35 | PUBLIC ice_itd_rem ! called in icethd |
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[8534] | 36 | PUBLIC ice_itd_reb ! called in icecor |
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[8422] | 37 | |
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[8534] | 38 | ! ** namelist (namitd) ** |
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| 39 | REAL(wp) :: rn_himean ! mean thickness of the domain |
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[8505] | 40 | |
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[8422] | 41 | !!---------------------------------------------------------------------- |
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[8486] | 42 | !! NEMO/ICE 4.0 , NEMO Consortium (2017) |
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[8422] | 43 | !! $Id: iceitd.F90 8420 2017-08-08 12:18:46Z clem $ |
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| 44 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 45 | !!---------------------------------------------------------------------- |
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| 46 | CONTAINS |
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| 47 | |
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| 48 | SUBROUTINE ice_itd_rem( kt ) |
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| 49 | !!------------------------------------------------------------------ |
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| 50 | !! *** ROUTINE ice_itd_rem *** |
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| 51 | !! |
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| 52 | !! ** Purpose : computes the redistribution of ice thickness |
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[8534] | 53 | !! after thermodynamic growth of ice thickness |
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[8422] | 54 | !! |
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[8534] | 55 | !! ** Method : Linear remapping |
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[8422] | 56 | !! |
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[8534] | 57 | !! References : W.H. Lipscomb, JGR 2001 |
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[8422] | 58 | !!------------------------------------------------------------------ |
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| 59 | INTEGER , INTENT (in) :: kt ! Ocean time step |
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| 60 | ! |
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| 61 | INTEGER :: ji, jj, jl, jcat ! dummy loop index |
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| 62 | INTEGER :: nidx2 ! local integer |
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| 63 | REAL(wp) :: zx1, zwk1, zdh0, zetamin, zdamax ! local scalars |
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| 64 | REAL(wp) :: zx2, zwk2, zda0, zetamax ! - - |
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| 65 | REAL(wp) :: zx3 |
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| 66 | REAL(wp) :: zslope ! used to compute local thermodynamic "speeds" |
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| 67 | |
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| 68 | INTEGER , DIMENSION(jpij) :: idxice2 ! compute remapping or not |
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| 69 | INTEGER , DIMENSION(jpij,jpl-1) :: jdonor ! donor category index |
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| 70 | REAL(wp), DIMENSION(jpij,jpl) :: zdhice ! ice thickness increment |
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| 71 | REAL(wp), DIMENSION(jpij,jpl) :: g0, g1 ! coefficients for fitting the line of the ITD |
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| 72 | REAL(wp), DIMENSION(jpij,jpl) :: hL, hR ! left and right boundary for the ITD for each thickness |
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| 73 | REAL(wp), DIMENSION(jpij,jpl-1) :: zdaice, zdvice ! local increment of ice area and volume |
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| 74 | REAL(wp), DIMENSION(jpij) :: zhb0, zhb1 ! category boundaries for thinnes categories |
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| 75 | REAL(wp), DIMENSION(jpij,0:jpl) :: zhbnew ! new boundaries of ice categories |
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| 76 | !!------------------------------------------------------------------ |
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| 77 | |
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[8512] | 78 | IF( kt == nit000 .AND. lwp ) WRITE(numout,*) '-- ice_itd_rem: remapping ice thickness distribution' |
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[8422] | 79 | |
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[8517] | 80 | IF( ln_icediachk ) CALL ice_cons_hsm(0, 'iceitd_rem', rdiag_v, rdiag_s, rdiag_t, rdiag_fv, rdiag_fs, rdiag_ft) |
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[8422] | 81 | |
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| 82 | !----------------------------------------------------------------------------------------------- |
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| 83 | ! 1) Identify grid cells with ice |
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| 84 | !----------------------------------------------------------------------------------------------- |
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[8486] | 85 | nidx = 0 ; idxice(:) = 0 |
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[8422] | 86 | DO jj = 1, jpj |
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| 87 | DO ji = 1, jpi |
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| 88 | IF ( at_i(ji,jj) > epsi10 ) THEN |
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| 89 | nidx = nidx + 1 |
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| 90 | idxice( nidx ) = (jj - 1) * jpi + ji |
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| 91 | ENDIF |
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| 92 | END DO |
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| 93 | END DO |
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| 94 | |
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| 95 | !----------------------------------------------------------------------------------------------- |
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| 96 | ! 2) Compute new category boundaries |
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| 97 | !----------------------------------------------------------------------------------------------- |
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| 98 | IF( nidx > 0 ) THEN |
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| 99 | |
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| 100 | zdhice(:,:) = 0._wp |
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| 101 | zhbnew(:,:) = 0._wp |
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| 102 | |
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| 103 | CALL tab_3d_2d( nidx, idxice(1:nidx), ht_i_2d (1:nidx,1:jpl), ht_i ) |
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| 104 | CALL tab_3d_2d( nidx, idxice(1:nidx), ht_ib_2d(1:nidx,1:jpl), ht_i_b ) |
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| 105 | CALL tab_3d_2d( nidx, idxice(1:nidx), a_i_2d (1:nidx,1:jpl), a_i ) |
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| 106 | CALL tab_3d_2d( nidx, idxice(1:nidx), a_ib_2d (1:nidx,1:jpl), a_i_b ) |
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| 107 | |
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| 108 | DO jl = 1, jpl |
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| 109 | ! Compute thickness change in each ice category |
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| 110 | DO ji = 1, nidx |
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| 111 | zdhice(ji,jl) = ht_i_2d(ji,jl) - ht_ib_2d(ji,jl) |
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| 112 | END DO |
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| 113 | END DO |
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| 114 | |
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| 115 | ! --- New boundaries for category 1:jpl-1 --- ! |
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| 116 | DO jl = 1, jpl - 1 |
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[8486] | 117 | ! |
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[8422] | 118 | DO ji = 1, nidx |
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| 119 | ! |
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| 120 | ! --- New boundary: Hn* = Hn + Fn*dt --- ! |
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| 121 | ! Fn*dt = ( fn + (fn+1 - fn)/(hn+1 - hn) * (Hn - hn) ) * dt = zdhice + zslope * (Hmax - ht_i_b) |
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| 122 | ! |
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| 123 | IF ( a_ib_2d(ji,jl) > epsi10 .AND. a_ib_2d(ji,jl+1) > epsi10 ) THEN ! a(jl+1) & a(jl) /= 0 |
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| 124 | zslope = ( zdhice(ji,jl+1) - zdhice(ji,jl) ) / ( ht_ib_2d(ji,jl+1) - ht_ib_2d(ji,jl) ) |
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| 125 | zhbnew(ji,jl) = hi_max(jl) + zdhice(ji,jl) + zslope * ( hi_max(jl) - ht_ib_2d(ji,jl) ) |
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| 126 | ELSEIF( a_ib_2d(ji,jl) > epsi10 .AND. a_ib_2d(ji,jl+1) <= epsi10 ) THEN ! a(jl+1)=0 => Hn* = Hn + fn*dt |
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| 127 | zhbnew(ji,jl) = hi_max(jl) + zdhice(ji,jl) |
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| 128 | ELSEIF( a_ib_2d(ji,jl) <= epsi10 .AND. a_ib_2d(ji,jl+1) > epsi10 ) THEN ! a(jl)=0 => Hn* = Hn + fn+1*dt |
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| 129 | zhbnew(ji,jl) = hi_max(jl) + zdhice(ji,jl+1) |
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| 130 | ELSE ! a(jl+1) & a(jl) = 0 |
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| 131 | zhbnew(ji,jl) = hi_max(jl) |
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| 132 | ENDIF |
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[8486] | 133 | ! |
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[8422] | 134 | ! --- 2 conditions for remapping --- ! |
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| 135 | ! 1) hn(t+1)+espi < Hn* < hn+1(t+1)-epsi |
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| 136 | ! Note: hn(t+1) must not be too close to either HR or HL otherwise a division by nearly 0 is possible |
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| 137 | ! in ice_itd_glinear in the case (HR-HL) = 3(Hice - HL) or = 3(HR - Hice) |
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| 138 | IF( a_i_2d(ji,jl ) > epsi10 .AND. ht_i_2d(ji,jl ) > ( zhbnew(ji,jl) - epsi10 ) ) idxice(ji) = 0 |
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| 139 | IF( a_i_2d(ji,jl+1) > epsi10 .AND. ht_i_2d(ji,jl+1) < ( zhbnew(ji,jl) + epsi10 ) ) idxice(ji) = 0 |
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| 140 | |
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| 141 | ! 2) Hn-1 < Hn* < Hn+1 |
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| 142 | IF( zhbnew(ji,jl) < hi_max(jl-1) ) idxice(ji) = 0 |
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| 143 | IF( zhbnew(ji,jl) > hi_max(jl+1) ) idxice(ji) = 0 |
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| 144 | |
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| 145 | END DO |
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| 146 | END DO |
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[8486] | 147 | ! |
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[8422] | 148 | ! --- New boundaries for category jpl --- ! |
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| 149 | DO ji = 1, nidx |
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| 150 | IF( a_i_2d(ji,jpl) > epsi10 ) THEN |
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| 151 | zhbnew(ji,jpl) = MAX( hi_max(jpl-1), 3._wp * ht_i_2d(ji,jpl) - 2._wp * zhbnew(ji,jpl-1) ) |
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| 152 | ELSE |
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| 153 | zhbnew(ji,jpl) = hi_max(jpl) |
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| 154 | ENDIF |
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| 155 | |
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| 156 | ! --- 1 additional condition for remapping (1st category) --- ! |
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| 157 | ! H0+epsi < h1(t) < H1-epsi |
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| 158 | ! h1(t) must not be too close to either HR or HL otherwise a division by nearly 0 is possible |
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| 159 | ! in ice_itd_glinear in the case (HR-HL) = 3(Hice - HL) or = 3(HR - Hice) |
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| 160 | IF( ht_ib_2d(ji,1) < ( hi_max(0) + epsi10 ) ) idxice(ji) = 0 |
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| 161 | IF( ht_ib_2d(ji,1) > ( hi_max(1) - epsi10 ) ) idxice(ji) = 0 |
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| 162 | END DO |
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[8486] | 163 | ! |
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[8422] | 164 | !----------------------------------------------------------------------------------------------- |
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| 165 | ! 3) Identify cells where remapping |
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| 166 | !----------------------------------------------------------------------------------------------- |
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| 167 | nidx2 = 0 ; idxice2(:) = 0 |
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| 168 | DO ji = 1, nidx |
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| 169 | IF( idxice(ji) /= 0 ) THEN |
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| 170 | nidx2 = nidx2 + 1 |
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| 171 | idxice2(nidx2) = idxice(ji) |
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| 172 | zhbnew(nidx2,:) = zhbnew(ji,:) ! adjust zhbnew to new indices |
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| 173 | ENDIF |
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| 174 | END DO |
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| 175 | idxice(:) = idxice2(:) |
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| 176 | nidx = nidx2 |
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[8486] | 177 | ! |
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[8422] | 178 | ENDIF |
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| 179 | |
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| 180 | !----------------------------------------------------------------------------------------------- |
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| 181 | ! 4) Compute g(h) |
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| 182 | !----------------------------------------------------------------------------------------------- |
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| 183 | IF( nidx > 0 ) THEN |
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[8486] | 184 | ! |
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| 185 | zhb0(:) = hi_max(0) ; zhb1(:) = hi_max(1) |
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| 186 | g0(:,:) = 0._wp ; g1(:,:) = 0._wp |
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| 187 | hL(:,:) = 0._wp ; hR(:,:) = 0._wp |
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| 188 | ! |
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[8422] | 189 | DO jl = 1, jpl |
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[8486] | 190 | ! |
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[8422] | 191 | CALL tab_2d_1d( nidx, idxice(1:nidx), ht_ib_1d(1:nidx), ht_i_b(:,:,jl) ) |
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| 192 | CALL tab_2d_1d( nidx, idxice(1:nidx), ht_i_1d (1:nidx), ht_i(:,:,jl) ) |
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| 193 | CALL tab_2d_1d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,jl) ) |
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| 194 | CALL tab_2d_1d( nidx, idxice(1:nidx), v_i_1d (1:nidx), v_i(:,:,jl) ) |
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[8486] | 195 | ! |
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[8422] | 196 | IF( jl == 1 ) THEN |
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[8486] | 197 | ! |
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[8422] | 198 | ! --- g(h) for category 1 --- ! |
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[8486] | 199 | CALL ice_itd_glinear( zhb0(1:nidx) , zhb1(1:nidx) , ht_ib_1d(1:nidx) , a_i_1d(1:nidx) , & ! in |
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| 200 | & g0 (1:nidx,1), g1 (1:nidx,1), hL (1:nidx,1), hR (1:nidx,1) ) ! out |
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| 201 | ! |
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[8422] | 202 | ! Area lost due to melting of thin ice |
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| 203 | DO ji = 1, nidx |
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[8486] | 204 | ! |
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[8422] | 205 | IF( a_i_1d(ji) > epsi10 ) THEN |
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[8486] | 206 | ! |
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[8422] | 207 | zdh0 = ht_i_1d(ji) - ht_ib_1d(ji) |
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| 208 | IF( zdh0 < 0.0 ) THEN !remove area from category 1 |
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| 209 | zdh0 = MIN( -zdh0, hi_max(1) ) |
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| 210 | !Integrate g(1) from 0 to dh0 to estimate area melted |
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| 211 | zetamax = MIN( zdh0, hR(ji,1) ) - hL(ji,1) |
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[8486] | 212 | ! |
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[8422] | 213 | IF( zetamax > 0.0 ) THEN |
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| 214 | zx1 = zetamax |
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| 215 | zx2 = 0.5 * zetamax * zetamax |
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| 216 | zda0 = g1(ji,1) * zx2 + g0(ji,1) * zx1 ! ice area removed |
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| 217 | zdamax = a_i_1d(ji) * (1.0 - ht_i_1d(ji) / ht_ib_1d(ji) ) ! Constrain new thickness <= ht_i |
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| 218 | zda0 = MIN( zda0, zdamax ) ! ice area lost due to melting |
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| 219 | ! of thin ice (zdamax > 0) |
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| 220 | ! Remove area, conserving volume |
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| 221 | ht_i_1d(ji) = ht_i_1d(ji) * a_i_1d(ji) / ( a_i_1d(ji) - zda0 ) |
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| 222 | a_i_1d(ji) = a_i_1d(ji) - zda0 |
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| 223 | v_i_1d(ji) = a_i_1d(ji) * ht_i_1d(ji) ! clem-useless ? |
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| 224 | ENDIF |
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[8486] | 225 | ! |
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[8422] | 226 | ELSE ! if ice accretion zdh0 > 0 |
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| 227 | ! zhbnew was 0, and is shifted to the right to account for thin ice growth in openwater (F0 = f1) |
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| 228 | zhbnew(ji,0) = MIN( zdh0, hi_max(1) ) |
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| 229 | ENDIF |
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[8486] | 230 | ! |
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[8422] | 231 | ENDIF |
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[8486] | 232 | ! |
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[8422] | 233 | END DO |
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[8486] | 234 | ! |
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[8422] | 235 | CALL tab_1d_2d( nidx, idxice(1:nidx), ht_i_1d (1:nidx), ht_i(:,:,jl) ) |
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| 236 | CALL tab_1d_2d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,jl) ) |
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| 237 | CALL tab_1d_2d( nidx, idxice(1:nidx), v_i_1d (1:nidx), v_i(:,:,jl) ) |
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[8486] | 238 | ! |
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[8422] | 239 | ENDIF ! jl=1 |
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[8486] | 240 | ! |
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[8422] | 241 | ! --- g(h) for each thickness category --- ! |
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[8486] | 242 | CALL ice_itd_glinear( zhbnew(1:nidx,jl-1), zhbnew(1:nidx,jl), ht_i_1d(1:nidx) , a_i_1d(1:nidx) , & ! in |
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| 243 | & g0 (1:nidx,jl ), g1 (1:nidx,jl), hL (1:nidx,jl), hR (1:nidx,jl) ) ! out |
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| 244 | ! |
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[8422] | 245 | END DO |
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| 246 | |
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| 247 | !----------------------------------------------------------------------------------------------- |
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| 248 | ! 5) Compute area and volume to be shifted across each boundary (Eq. 18) |
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| 249 | !----------------------------------------------------------------------------------------------- |
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| 250 | DO jl = 1, jpl - 1 |
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[8486] | 251 | ! |
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[8422] | 252 | DO ji = 1, nidx |
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[8486] | 253 | ! |
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[8422] | 254 | ! left and right integration limits in eta space |
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| 255 | IF (zhbnew(ji,jl) > hi_max(jl)) THEN ! Hn* > Hn => transfer from jl to jl+1 |
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| 256 | zetamin = MAX( hi_max(jl) , hL(ji,jl) ) - hL(ji,jl) ! hi_max(jl) - hL |
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| 257 | zetamax = MIN( zhbnew(ji,jl), hR(ji,jl) ) - hL(ji,jl) ! hR - hL |
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| 258 | jdonor(ji,jl) = jl |
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| 259 | ELSE ! Hn* <= Hn => transfer from jl+1 to jl |
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| 260 | zetamin = 0.0 |
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| 261 | zetamax = MIN( hi_max(jl), hR(ji,jl+1) ) - hL(ji,jl+1) ! hi_max(jl) - hL |
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| 262 | jdonor(ji,jl) = jl + 1 |
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| 263 | ENDIF |
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| 264 | zetamax = MAX( zetamax, zetamin ) ! no transfer if etamax < etamin |
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[8486] | 265 | ! |
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[8422] | 266 | zx1 = zetamax - zetamin |
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| 267 | zwk1 = zetamin * zetamin |
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| 268 | zwk2 = zetamax * zetamax |
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| 269 | zx2 = 0.5 * ( zwk2 - zwk1 ) |
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| 270 | zwk1 = zwk1 * zetamin |
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| 271 | zwk2 = zwk2 * zetamax |
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| 272 | zx3 = 1.0 / 3.0 * ( zwk2 - zwk1 ) |
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| 273 | jcat = jdonor(ji,jl) |
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| 274 | zdaice(ji,jl) = g1(ji,jcat)*zx2 + g0(ji,jcat)*zx1 |
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| 275 | zdvice(ji,jl) = g1(ji,jcat)*zx3 + g0(ji,jcat)*zx2 + zdaice(ji,jl)*hL(ji,jcat) |
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[8486] | 276 | ! |
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[8422] | 277 | END DO |
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| 278 | END DO |
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| 279 | |
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| 280 | !---------------------------------------------------------------------------------------------- |
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| 281 | ! 6) Shift ice between categories |
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| 282 | !---------------------------------------------------------------------------------------------- |
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| 283 | CALL ice_itd_shiftice ( jdonor(1:nidx,:), zdaice(1:nidx,:), zdvice(1:nidx,:) ) |
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| 284 | |
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| 285 | !---------------------------------------------------------------------------------------------- |
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| 286 | ! 7) Make sure ht_i >= minimum ice thickness hi_min |
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| 287 | !---------------------------------------------------------------------------------------------- |
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| 288 | CALL tab_2d_1d( nidx, idxice(1:nidx), ht_i_1d (1:nidx), ht_i(:,:,1) ) |
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| 289 | CALL tab_2d_1d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,1) ) |
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[8514] | 290 | CALL tab_2d_1d( nidx, idxice(1:nidx), a_ip_1d (1:nidx), a_ip(:,:,1) ) |
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[8422] | 291 | |
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| 292 | DO ji = 1, nidx |
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| 293 | IF ( a_i_1d(ji) > epsi10 .AND. ht_i_1d(ji) < rn_himin ) THEN |
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| 294 | a_i_1d (ji) = a_i_1d(ji) * ht_i_1d(ji) / rn_himin |
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| 295 | ! MV MP 2016 |
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| 296 | IF ( nn_pnd_scheme > 0 ) THEN |
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| 297 | a_ip_1d(ji) = a_ip_1d(ji) * ht_i_1d(ji) / rn_himin |
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| 298 | ENDIF |
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| 299 | ! END MV MP 2016 |
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| 300 | ht_i_1d(ji) = rn_himin |
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| 301 | ENDIF |
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| 302 | END DO |
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[8486] | 303 | ! |
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[8422] | 304 | CALL tab_1d_2d( nidx, idxice(1:nidx), ht_i_1d (1:nidx), ht_i(:,:,1) ) |
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| 305 | CALL tab_1d_2d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,1) ) |
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[8514] | 306 | CALL tab_1d_2d( nidx, idxice(1:nidx), a_ip_1d (1:nidx), a_ip(:,:,1) ) |
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[8486] | 307 | ! |
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[8422] | 308 | ENDIF |
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[8486] | 309 | ! |
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[8517] | 310 | IF( ln_icediachk ) CALL ice_cons_hsm(1, 'iceitd_rem', rdiag_v, rdiag_s, rdiag_t, rdiag_fv, rdiag_fs, rdiag_ft) |
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[8486] | 311 | ! |
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[8422] | 312 | END SUBROUTINE ice_itd_rem |
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| 313 | |
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| 314 | |
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| 315 | SUBROUTINE ice_itd_glinear( HbL, Hbr, phice, paice, pg0, pg1, phL, phR ) |
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| 316 | !!------------------------------------------------------------------ |
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| 317 | !! *** ROUTINE ice_itd_glinear *** |
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| 318 | !! |
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| 319 | !! ** Purpose : build g(h) satisfying area and volume constraints (Eq. 6 and 9) |
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| 320 | !! |
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| 321 | !! ** Method : g(h) is linear and written as: g(eta) = g1(eta) + g0 |
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| 322 | !! with eta = h - HL |
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| 323 | !!------------------------------------------------------------------ |
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| 324 | REAL(wp), DIMENSION(:), INTENT(in ) :: HbL, HbR ! left and right category boundaries |
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| 325 | REAL(wp), DIMENSION(:), INTENT(in ) :: phice, paice ! ice thickness and concentration |
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| 326 | REAL(wp), DIMENSION(:), INTENT(inout) :: pg0, pg1 ! coefficients in linear equation for g(eta) |
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| 327 | REAL(wp), DIMENSION(:), INTENT(inout) :: phL, phR ! min and max value of range over which g(h) > 0 |
---|
| 328 | ! |
---|
| 329 | INTEGER :: ji ! horizontal indices |
---|
[8486] | 330 | REAL(wp) :: z1_3 , z2_3 ! 1/3 , 2/3 |
---|
[8422] | 331 | REAL(wp) :: zh13 ! HbL + 1/3 * (HbR - HbL) |
---|
| 332 | REAL(wp) :: zh23 ! HbL + 2/3 * (HbR - HbL) |
---|
| 333 | REAL(wp) :: zdhr ! 1 / (hR - hL) |
---|
| 334 | REAL(wp) :: zwk1, zwk2 ! temporary variables |
---|
| 335 | !!------------------------------------------------------------------ |
---|
| 336 | ! |
---|
[8486] | 337 | z1_3 = 1._wp / 3._wp |
---|
| 338 | z2_3 = 2._wp / 3._wp |
---|
| 339 | ! |
---|
| 340 | DO ji = 1, nidx |
---|
| 341 | ! |
---|
| 342 | IF( paice(ji) > epsi10 .AND. phice(ji) > 0._wp ) THEN |
---|
[8422] | 343 | ! |
---|
[8486] | 344 | ! Initialize hL and hR |
---|
| 345 | phL(ji) = HbL(ji) |
---|
| 346 | phR(ji) = HbR(ji) |
---|
| 347 | ! |
---|
| 348 | ! Change hL or hR if hice falls outside central third of range, |
---|
| 349 | ! so that hice is in the central third of the range [HL HR] |
---|
| 350 | zh13 = z1_3 * ( 2._wp * phL(ji) + phR(ji) ) |
---|
| 351 | zh23 = z1_3 * ( phL(ji) + 2._wp * phR(ji) ) |
---|
| 352 | ! |
---|
| 353 | IF ( phice(ji) < zh13 ) THEN ; phR(ji) = 3._wp * phice(ji) - 2._wp * phL(ji) ! move HR to the left |
---|
| 354 | ELSEIF( phice(ji) > zh23 ) THEN ; phL(ji) = 3._wp * phice(ji) - 2._wp * phR(ji) ! move HL to the right |
---|
[8422] | 355 | ENDIF |
---|
| 356 | ! |
---|
[8486] | 357 | ! Compute coefficients of g(eta) = g0 + g1*eta |
---|
| 358 | zdhr = 1._wp / (phR(ji) - phL(ji)) |
---|
| 359 | zwk1 = 6._wp * paice(ji) * zdhr |
---|
| 360 | zwk2 = ( phice(ji) - phL(ji) ) * zdhr |
---|
| 361 | pg0(ji) = zwk1 * ( z2_3 - zwk2 ) ! Eq. 14 |
---|
| 362 | pg1(ji) = 2._wp * zdhr * zwk1 * ( zwk2 - 0.5_wp ) ! Eq. 14 |
---|
| 363 | ! |
---|
| 364 | ELSE ! remap_flag = .false. or a_i < epsi10 |
---|
| 365 | phL(ji) = 0._wp |
---|
| 366 | phR(ji) = 0._wp |
---|
| 367 | pg0(ji) = 0._wp |
---|
| 368 | pg1(ji) = 0._wp |
---|
| 369 | ENDIF |
---|
| 370 | ! |
---|
| 371 | END DO |
---|
[8422] | 372 | ! |
---|
| 373 | END SUBROUTINE ice_itd_glinear |
---|
| 374 | |
---|
| 375 | |
---|
| 376 | SUBROUTINE ice_itd_shiftice( kdonor, pdaice, pdvice ) |
---|
| 377 | !!------------------------------------------------------------------ |
---|
| 378 | !! *** ROUTINE ice_itd_shiftice *** |
---|
| 379 | !! |
---|
| 380 | !! ** Purpose : shift ice across category boundaries, conserving everything |
---|
| 381 | !! ( area, volume, energy, age*vol, and mass of salt ) |
---|
| 382 | !!------------------------------------------------------------------ |
---|
| 383 | INTEGER , DIMENSION(:,:), INTENT(in) :: kdonor ! donor category index |
---|
| 384 | REAL(wp), DIMENSION(:,:), INTENT(in) :: pdaice ! ice area transferred across boundary |
---|
| 385 | REAL(wp), DIMENSION(:,:), INTENT(in) :: pdvice ! ice volume transferred across boundary |
---|
[8486] | 386 | ! |
---|
| 387 | INTEGER :: ji, jj, jl, jk ! dummy loop indices |
---|
| 388 | INTEGER :: ii, ij, jl2, jl1 ! local integers |
---|
[8422] | 389 | REAL(wp) :: ztrans ! ice/snow transferred |
---|
[8486] | 390 | REAL(wp), DIMENSION(jpij) :: zworka, zworkv ! workspace |
---|
| 391 | REAL(wp), DIMENSION(jpij,jpl) :: zaTsfn ! - - |
---|
[8422] | 392 | !!------------------------------------------------------------------ |
---|
| 393 | |
---|
| 394 | CALL tab_3d_2d( nidx, idxice(1:nidx), ht_i_2d (1:nidx,1:jpl), ht_i ) |
---|
| 395 | CALL tab_3d_2d( nidx, idxice(1:nidx), a_i_2d (1:nidx,1:jpl), a_i ) |
---|
| 396 | CALL tab_3d_2d( nidx, idxice(1:nidx), v_i_2d (1:nidx,1:jpl), v_i ) |
---|
| 397 | CALL tab_3d_2d( nidx, idxice(1:nidx), v_s_2d (1:nidx,1:jpl), v_s ) |
---|
| 398 | CALL tab_3d_2d( nidx, idxice(1:nidx), oa_i_2d (1:nidx,1:jpl), oa_i ) |
---|
| 399 | CALL tab_3d_2d( nidx, idxice(1:nidx), smv_i_2d(1:nidx,1:jpl), smv_i ) |
---|
| 400 | CALL tab_3d_2d( nidx, idxice(1:nidx), a_ip_2d (1:nidx,1:jpl), a_ip ) |
---|
| 401 | CALL tab_3d_2d( nidx, idxice(1:nidx), v_ip_2d (1:nidx,1:jpl), v_ip ) |
---|
| 402 | CALL tab_3d_2d( nidx, idxice(1:nidx), t_su_2d (1:nidx,1:jpl), t_su ) |
---|
| 403 | |
---|
| 404 | !---------------------------------------------------------------------------------------------- |
---|
| 405 | ! 1) Define a variable equal to a_i*T_su |
---|
| 406 | !---------------------------------------------------------------------------------------------- |
---|
| 407 | DO jl = 1, jpl |
---|
| 408 | DO ji = 1, nidx |
---|
| 409 | zaTsfn(ji,jl) = a_i_2d(ji,jl) * t_su_2d(ji,jl) |
---|
| 410 | END DO |
---|
| 411 | END DO |
---|
| 412 | |
---|
| 413 | !------------------------------------------------------------------------------- |
---|
| 414 | ! 2) Transfer volume and energy between categories |
---|
| 415 | !------------------------------------------------------------------------------- |
---|
| 416 | DO jl = 1, jpl - 1 |
---|
| 417 | DO ji = 1, nidx |
---|
[8486] | 418 | ! |
---|
[8422] | 419 | jl1 = kdonor(ji,jl) |
---|
[8486] | 420 | ! |
---|
[8500] | 421 | IF( jl1 > 0 ) THEN |
---|
| 422 | ! |
---|
| 423 | IF ( jl1 == jl ) THEN ; jl2 = jl1+1 |
---|
| 424 | ELSE ; jl2 = jl |
---|
| 425 | ENDIF |
---|
| 426 | ! |
---|
| 427 | IF( v_i_2d(ji,jl1) >= epsi10 ) THEN ; zworkv(ji) = pdvice(ji,jl) / v_i_2d(ji,jl1) |
---|
| 428 | ELSE ; zworkv(ji) = 0._wp |
---|
| 429 | ENDIF |
---|
| 430 | IF( a_i_2d(ji,jl1) >= epsi10 ) THEN ; zworka(ji) = pdaice(ji,jl) / a_i_2d(ji,jl1) |
---|
| 431 | ELSE ; zworka(ji) = 0._wp |
---|
| 432 | ENDIF |
---|
| 433 | ! |
---|
| 434 | a_i_2d(ji,jl1) = a_i_2d(ji,jl1) - pdaice(ji,jl) ! Ice areas |
---|
| 435 | a_i_2d(ji,jl2) = a_i_2d(ji,jl2) + pdaice(ji,jl) |
---|
| 436 | ! |
---|
| 437 | v_i_2d(ji,jl1) = v_i_2d(ji,jl1) - pdvice(ji,jl) ! Ice volumes |
---|
| 438 | v_i_2d(ji,jl2) = v_i_2d(ji,jl2) + pdvice(ji,jl) |
---|
| 439 | ! |
---|
| 440 | ztrans = v_s_2d(ji,jl1) * zworkv(ji) ! Snow volumes |
---|
| 441 | v_s_2d(ji,jl1) = v_s_2d(ji,jl1) - ztrans |
---|
| 442 | v_s_2d(ji,jl2) = v_s_2d(ji,jl2) + ztrans |
---|
| 443 | ! |
---|
| 444 | ! ! Ice age |
---|
| 445 | ztrans = oa_i_2d(ji,jl1) * pdaice(ji,jl) !!clem: should be * zworka(ji) but it does not work ???? |
---|
| 446 | oa_i_2d(ji,jl1) = oa_i_2d(ji,jl1) - ztrans |
---|
| 447 | oa_i_2d(ji,jl2) = oa_i_2d(ji,jl2) + ztrans |
---|
| 448 | ! |
---|
| 449 | ztrans = smv_i_2d(ji,jl1) * zworkv(ji) ! Ice salinity |
---|
| 450 | ! |
---|
| 451 | smv_i_2d(ji,jl1) = smv_i_2d(ji,jl1) - ztrans |
---|
| 452 | smv_i_2d(ji,jl2) = smv_i_2d(ji,jl2) + ztrans |
---|
| 453 | ! |
---|
| 454 | ! ! Surface temperature |
---|
| 455 | ztrans = t_su_2d(ji,jl1) * pdaice(ji,jl) !!clem: should be * zworka(ji) but it does not work ???? |
---|
| 456 | zaTsfn(ji,jl1) = zaTsfn(ji,jl1) - ztrans |
---|
| 457 | zaTsfn(ji,jl2) = zaTsfn(ji,jl2) + ztrans |
---|
| 458 | ! |
---|
| 459 | ! MV MP 2016 |
---|
| 460 | IF ( nn_pnd_scheme > 0 ) THEN |
---|
| 461 | ! ! Pond fraction |
---|
| 462 | ztrans = a_ip_2d(ji,jl1) * pdaice(ji,jl) !!clem: should be * zworka(ji) but it does not work |
---|
| 463 | a_ip_2d(ji,jl1) = a_ip_2d(ji,jl1) - ztrans |
---|
| 464 | a_ip_2d(ji,jl2) = a_ip_2d(ji,jl2) + ztrans |
---|
| 465 | ! ! Pond volume (also proportional to da/a) |
---|
| 466 | ztrans = v_ip_2d(ji,jl1) * pdaice(ji,jl) !!clem: should be * zworka(ji) but it does not work |
---|
| 467 | v_ip_2d(ji,jl1) = v_ip_2d(ji,jl1) - ztrans |
---|
| 468 | v_ip_2d(ji,jl2) = v_ip_2d(ji,jl2) + ztrans |
---|
| 469 | ENDIF |
---|
| 470 | ! END MV MP 2016 |
---|
| 471 | ! |
---|
| 472 | ENDIF ! jl1 >0 |
---|
[8422] | 473 | END DO |
---|
[8486] | 474 | ! |
---|
| 475 | DO jk = 1, nlay_s !--- Snow heat content |
---|
| 476 | ! |
---|
[8422] | 477 | DO ji = 1, nidx |
---|
| 478 | ii = MOD( idxice(ji) - 1, jpi ) + 1 |
---|
| 479 | ij = ( idxice(ji) - 1 ) / jpi + 1 |
---|
[8486] | 480 | ! |
---|
[8422] | 481 | jl1 = kdonor(ji,jl) |
---|
[8500] | 482 | ! |
---|
| 483 | IF( jl1 > 0 ) THEN |
---|
| 484 | IF(jl1 == jl) THEN ; jl2 = jl+1 |
---|
| 485 | ELSE ; jl2 = jl |
---|
| 486 | ENDIF |
---|
| 487 | ! |
---|
| 488 | ztrans = e_s(ii,ij,jk,jl1) * zworkv(ji) |
---|
| 489 | e_s(ii,ij,jk,jl1) = e_s(ii,ij,jk,jl1) - ztrans |
---|
| 490 | e_s(ii,ij,jk,jl2) = e_s(ii,ij,jk,jl2) + ztrans |
---|
[8422] | 491 | ENDIF |
---|
| 492 | END DO |
---|
| 493 | END DO |
---|
| 494 | |
---|
[8486] | 495 | DO jk = 1, nlay_i !--- Ice heat content |
---|
[8422] | 496 | DO ji = 1, nidx |
---|
| 497 | ii = MOD( idxice(ji) - 1, jpi ) + 1 |
---|
| 498 | ij = ( idxice(ji) - 1 ) / jpi + 1 |
---|
[8486] | 499 | ! |
---|
[8422] | 500 | jl1 = kdonor(ji,jl) |
---|
[8500] | 501 | ! |
---|
| 502 | IF( jl1 > 0 ) THEN |
---|
| 503 | IF(jl1 == jl) THEN ; jl2 = jl+1 |
---|
| 504 | ELSE ; jl2 = jl |
---|
| 505 | ENDIF |
---|
| 506 | ! |
---|
| 507 | ztrans = e_i(ii,ij,jk,jl1) * zworkv(ji) |
---|
| 508 | e_i(ii,ij,jk,jl1) = e_i(ii,ij,jk,jl1) - ztrans |
---|
| 509 | e_i(ii,ij,jk,jl2) = e_i(ii,ij,jk,jl2) + ztrans |
---|
[8422] | 510 | ENDIF |
---|
| 511 | END DO |
---|
| 512 | END DO |
---|
[8486] | 513 | ! |
---|
[8422] | 514 | END DO ! boundaries, 1 to jpl-1 |
---|
| 515 | |
---|
| 516 | !------------------------------------------------------------------------------- |
---|
| 517 | ! 3) Update ice thickness and temperature |
---|
| 518 | !------------------------------------------------------------------------------- |
---|
[8500] | 519 | WHERE( a_i_2d(1:nidx,:) >= epsi20 ) |
---|
| 520 | ht_i_2d(1:nidx,:) = v_i_2d(1:nidx,:) / a_i_2d(1:nidx,:) |
---|
| 521 | t_su_2d(1:nidx,:) = zaTsfn(1:nidx,:) / a_i_2d(1:nidx,:) |
---|
| 522 | ELSEWHERE |
---|
| 523 | ht_i_2d(1:nidx,:) = 0._wp |
---|
| 524 | t_su_2d(1:nidx,:) = rt0 |
---|
| 525 | END WHERE |
---|
[8422] | 526 | ! |
---|
[8486] | 527 | CALL tab_2d_3d( nidx, idxice(1:nidx), ht_i_2d (1:nidx,1:jpl), ht_i ) |
---|
| 528 | CALL tab_2d_3d( nidx, idxice(1:nidx), a_i_2d (1:nidx,1:jpl), a_i ) |
---|
| 529 | CALL tab_2d_3d( nidx, idxice(1:nidx), v_i_2d (1:nidx,1:jpl), v_i ) |
---|
| 530 | CALL tab_2d_3d( nidx, idxice(1:nidx), v_s_2d (1:nidx,1:jpl), v_s ) |
---|
| 531 | CALL tab_2d_3d( nidx, idxice(1:nidx), oa_i_2d (1:nidx,1:jpl), oa_i ) |
---|
| 532 | CALL tab_2d_3d( nidx, idxice(1:nidx), smv_i_2d(1:nidx,1:jpl), smv_i ) |
---|
| 533 | CALL tab_2d_3d( nidx, idxice(1:nidx), a_ip_2d (1:nidx,1:jpl), a_ip ) |
---|
| 534 | CALL tab_2d_3d( nidx, idxice(1:nidx), v_ip_2d (1:nidx,1:jpl), v_ip ) |
---|
| 535 | CALL tab_2d_3d( nidx, idxice(1:nidx), t_su_2d (1:nidx,1:jpl), t_su ) |
---|
| 536 | ! |
---|
[8422] | 537 | END SUBROUTINE ice_itd_shiftice |
---|
| 538 | |
---|
| 539 | |
---|
[8512] | 540 | SUBROUTINE ice_itd_reb( kt ) |
---|
[8422] | 541 | !!------------------------------------------------------------------ |
---|
| 542 | !! *** ROUTINE ice_itd_reb *** |
---|
| 543 | !! |
---|
| 544 | !! ** Purpose : rebin - rebins thicknesses into defined categories |
---|
| 545 | !! |
---|
| 546 | !! ** Method : If a category thickness is out of bounds, shift part (for down to top) |
---|
| 547 | !! or entire (for top to down) area, volume, and energy |
---|
| 548 | !! to the neighboring category |
---|
| 549 | !!------------------------------------------------------------------ |
---|
[8512] | 550 | INTEGER , INTENT (in) :: kt ! Ocean time step |
---|
[8422] | 551 | INTEGER :: ji, jj, jl ! dummy loop indices |
---|
| 552 | ! |
---|
| 553 | INTEGER , DIMENSION(jpij,jpl-1) :: jdonor ! donor category index |
---|
| 554 | REAL(wp), DIMENSION(jpij,jpl-1) :: zdaice, zdvice ! ice area and volume transferred |
---|
| 555 | !!------------------------------------------------------------------ |
---|
[8486] | 556 | ! |
---|
[8512] | 557 | IF( kt == nit000 .AND. lwp ) WRITE(numout,*) '-- ice_itd_reb: rebining ice thickness distribution' |
---|
| 558 | |
---|
[8486] | 559 | jdonor(:,:) = 0 |
---|
| 560 | zdaice(:,:) = 0._wp |
---|
| 561 | zdvice(:,:) = 0._wp |
---|
| 562 | ! |
---|
| 563 | ! !--------------------------------------- |
---|
| 564 | DO jl = 1, jpl-1 ! identify thicknesses that are too big |
---|
| 565 | ! !--------------------------------------- |
---|
| 566 | nidx = 0 ; idxice(:) = 0 |
---|
[8422] | 567 | DO jj = 1, jpj |
---|
| 568 | DO ji = 1, jpi |
---|
| 569 | IF( a_i(ji,jj,jl) > epsi10 .AND. v_i(ji,jj,jl) > (a_i(ji,jj,jl) * hi_max(jl)) ) THEN |
---|
| 570 | nidx = nidx + 1 |
---|
| 571 | idxice( nidx ) = (jj - 1) * jpi + ji |
---|
| 572 | ENDIF |
---|
[8486] | 573 | END DO |
---|
| 574 | END DO |
---|
| 575 | ! |
---|
[8422] | 576 | !!clem CALL tab_2d_1d( nidx, idxice(1:nidx), ht_i_1d (1:nidx), ht_i(:,:,jl) ) |
---|
| 577 | CALL tab_2d_1d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,jl) ) |
---|
| 578 | CALL tab_2d_1d( nidx, idxice(1:nidx), v_i_1d (1:nidx), v_i(:,:,jl) ) |
---|
[8486] | 579 | ! |
---|
[8422] | 580 | DO ji = 1, nidx |
---|
| 581 | jdonor(ji,jl) = jl |
---|
| 582 | ! how much of a_i you send in cat sup is somewhat arbitrary |
---|
| 583 | !!clem: these do not work properly after a restart (I do not know why) |
---|
| 584 | !! zdaice(ji,jl) = a_i_1d(ji) * ( ht_i_1d(ji) - hi_max(jl) + epsi10 ) / ht_i_1d(ji) |
---|
| 585 | !! zdvice(ji,jl) = v_i_1d(ji) - ( a_i_1d(ji) - zdaice(ji,jl) ) * ( hi_max(jl) - epsi10 ) |
---|
| 586 | !!clem: these do not work properly after a restart (I do not know why) |
---|
| 587 | !! zdaice(ji,jl) = a_i_1d(ji) |
---|
| 588 | !! zdvice(ji,jl) = v_i_1d(ji) |
---|
| 589 | !!clem: these are from UCL and work ok |
---|
| 590 | zdaice(ji,jl) = a_i_1d(ji) * 0.5_wp |
---|
| 591 | zdvice(ji,jl) = v_i_1d(ji) - zdaice(ji,jl) * ( hi_max(jl) + hi_max(jl-1) ) * 0.5_wp |
---|
| 592 | END DO |
---|
[8486] | 593 | ! |
---|
[8422] | 594 | IF( nidx > 0 ) THEN |
---|
| 595 | CALL ice_itd_shiftice( jdonor(1:nidx,:), zdaice(1:nidx,:), zdvice(1:nidx,:) ) ! Shift jl=>jl+1 |
---|
| 596 | ! Reset shift parameters |
---|
| 597 | jdonor(1:nidx,jl) = 0 |
---|
| 598 | zdaice(1:nidx,jl) = 0._wp |
---|
| 599 | zdvice(1:nidx,jl) = 0._wp |
---|
| 600 | ENDIF |
---|
| 601 | ! |
---|
| 602 | END DO |
---|
| 603 | |
---|
[8486] | 604 | ! !----------------------------------------- |
---|
| 605 | DO jl = jpl-1, 1, -1 ! Identify thicknesses that are too small |
---|
| 606 | ! !----------------------------------------- |
---|
[8422] | 607 | nidx = 0 ; idxice(:) = 0 |
---|
| 608 | DO jj = 1, jpj |
---|
| 609 | DO ji = 1, jpi |
---|
| 610 | IF( a_i(ji,jj,jl+1) > epsi10 .AND. v_i(ji,jj,jl+1) <= (a_i(ji,jj,jl+1) * hi_max(jl)) ) THEN |
---|
| 611 | nidx = nidx + 1 |
---|
| 612 | idxice( nidx ) = (jj - 1) * jpi + ji |
---|
| 613 | ENDIF |
---|
[8486] | 614 | END DO |
---|
| 615 | END DO |
---|
| 616 | ! |
---|
[8422] | 617 | CALL tab_2d_1d( nidx, idxice(1:nidx), a_i_1d (1:nidx), a_i(:,:,jl+1) ) ! jl+1 is ok |
---|
| 618 | CALL tab_2d_1d( nidx, idxice(1:nidx), v_i_1d (1:nidx), v_i(:,:,jl+1) ) ! jl+1 is ok |
---|
| 619 | DO ji = 1, nidx |
---|
| 620 | jdonor(ji,jl) = jl + 1 |
---|
| 621 | zdaice(ji,jl) = a_i_1d(ji) |
---|
| 622 | zdvice(ji,jl) = v_i_1d(ji) |
---|
| 623 | END DO |
---|
[8486] | 624 | ! |
---|
[8422] | 625 | IF( nidx > 0 ) THEN |
---|
| 626 | CALL ice_itd_shiftice( jdonor(1:nidx,:), zdaice(1:nidx,:), zdvice(1:nidx,:) ) ! Shift jl+1=>jl |
---|
| 627 | ! Reset shift parameters |
---|
| 628 | jdonor(1:nidx,jl) = 0 |
---|
| 629 | zdaice(1:nidx,jl) = 0._wp |
---|
| 630 | zdvice(1:nidx,jl) = 0._wp |
---|
| 631 | ENDIF |
---|
[8486] | 632 | ! |
---|
[8422] | 633 | END DO |
---|
| 634 | ! |
---|
| 635 | END SUBROUTINE ice_itd_reb |
---|
| 636 | |
---|
[8505] | 637 | SUBROUTINE ice_itd_init |
---|
| 638 | !!------------------------------------------------------------------ |
---|
| 639 | !! *** ROUTINE ice_itd_init *** |
---|
| 640 | !! |
---|
| 641 | !! ** Purpose : Initializes the ice thickness distribution |
---|
| 642 | !! ** Method : ... |
---|
[8531] | 643 | !! ** input : Namelist namitd |
---|
[8505] | 644 | !!------------------------------------------------------------------- |
---|
| 645 | INTEGER :: jl ! dummy loop index |
---|
| 646 | INTEGER :: ios ! Local integer output status for namelist read |
---|
| 647 | REAL(wp) :: zhmax, znum, zden, zalpha ! - - |
---|
| 648 | !! |
---|
[8531] | 649 | NAMELIST/namitd/ rn_himean, rn_himin |
---|
[8505] | 650 | !!------------------------------------------------------------------ |
---|
| 651 | ! |
---|
[8531] | 652 | REWIND( numnam_ice_ref ) ! Namelist namitd in reference namelist : Parameters for ice |
---|
| 653 | READ ( numnam_ice_ref, namitd, IOSTAT = ios, ERR = 901) |
---|
| 654 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namitd in reference namelist', lwp ) |
---|
[8505] | 655 | |
---|
[8531] | 656 | REWIND( numnam_ice_cfg ) ! Namelist namitd in configuration namelist : Parameters for ice |
---|
| 657 | READ ( numnam_ice_cfg, namitd, IOSTAT = ios, ERR = 902 ) |
---|
| 658 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namitd in configuration namelist', lwp ) |
---|
| 659 | IF(lwm) WRITE ( numoni, namitd ) |
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[8505] | 660 | ! |
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| 661 | IF(lwp) THEN ! control print |
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| 662 | WRITE(numout,*) |
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[8514] | 663 | WRITE(numout,*) 'ice_itd_init: Initialization of ice cat distribution ' |
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[8505] | 664 | WRITE(numout,*) '~~~~~~~~~~~~' |
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[8531] | 665 | WRITE(numout,*) ' Namelist namitd: ' |
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[8505] | 666 | WRITE(numout,*) ' mean ice thickness in the domain rn_himean = ', rn_himean |
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[8515] | 667 | WRITE(numout,*) ' minimum ice thickness rn_himin = ', rn_himin |
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[8505] | 668 | ENDIF |
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| 669 | ! |
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| 670 | !-----------------------------------! |
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| 671 | ! Thickness categories boundaries ! |
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| 672 | !-----------------------------------! |
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| 673 | ! |
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| 674 | zalpha = 0.05_wp ! max of each category (from h^(-alpha) function) |
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| 675 | zhmax = 3._wp * rn_himean |
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| 676 | DO jl = 1, jpl |
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| 677 | znum = jpl * ( zhmax+1 )**zalpha |
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| 678 | zden = REAL( jpl-jl , wp ) * ( zhmax + 1._wp )**zalpha + REAL( jl , wp ) |
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| 679 | hi_max(jl) = ( znum / zden )**(1./zalpha) - 1 |
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| 680 | END DO |
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| 681 | ! |
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| 682 | DO jl = 1, jpl ! mean thickness by category |
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| 683 | hi_mean(jl) = ( hi_max(jl) + hi_max(jl-1) ) * 0.5_wp |
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| 684 | END DO |
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| 685 | ! |
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| 686 | hi_max(jpl) = 99._wp ! set to a big value to ensure that all ice is thinner than hi_max(jpl) |
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| 687 | ! |
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| 688 | IF(lwp) WRITE(numout,*) |
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| 689 | IF(lwp) WRITE(numout,*) ' ===>>> resulting thickness category boundaries :' |
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| 690 | IF(lwp) WRITE(numout,*) ' hi_max(:)= ', hi_max(0:jpl) |
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| 691 | ! |
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| 692 | END SUBROUTINE ice_itd_init |
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| 693 | |
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[8486] | 694 | #else |
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| 695 | !!---------------------------------------------------------------------- |
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[8534] | 696 | !! Default option : Empty module NO ESIM sea-ice model |
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[8486] | 697 | !!---------------------------------------------------------------------- |
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[8422] | 698 | #endif |
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[8486] | 699 | |
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[8422] | 700 | !!====================================================================== |
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| 701 | END MODULE iceitd |
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