[7293] | 1 | MODULE limmp |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE limmp *** |
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| 4 | !! Melt ponds |
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| 5 | !!====================================================================== |
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| 6 | !! history : ! Original code by Daniela Flocco and Adrian Turner |
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| 7 | !! 1.0 ! 2012 (O. Lecomte) Adaptation for scientific tests (NEMO3.1) |
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| 8 | !! 2.0 ! 2016 (O. Lecomte, C. Rousset, M. Vancoppenolle) Implementation in NEMO3.6 |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | #if defined key_lim3 |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! 'key_lim3' : LIM3 sea-ice model |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | !! lim_mp_init : some initialization and namelist read |
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| 15 | !! lim_mp : main calling routine |
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| 16 | !! compute_mp_topo : actual melt pond routine |
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| 17 | !! pond_area : computes melt pond fraction per category |
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| 18 | !! calc_hpond : computes melt pond depth |
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| 19 | !! permeability_phy : computes permeability |
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| 20 | |
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| 21 | !!---------------------------------------------------------------------- |
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| 22 | ! USE phycst ! physical constants |
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| 23 | ! USE dom_oce ! ocean space and time domain |
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| 24 | ! USE sbc_ice ! Surface boundary condition: ice fields |
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| 25 | USE ice ! LIM-3 variables |
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| 26 | USE lbclnk ! lateral boundary conditions - MPP exchanges |
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| 27 | USE lib_mpp ! MPP library |
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| 28 | USE wrk_nemo ! work arrays |
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| 29 | USE in_out_manager ! I/O manager |
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| 30 | USE lib_fortran ! glob_sum |
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| 31 | USE timing ! Timing |
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| 32 | ! USE limcons ! conservation tests |
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| 33 | ! USE limctl ! control prints |
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| 34 | ! USE limvar |
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| 35 | |
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| 36 | !OLI_CODE USE ice_oce, ONLY: rdt_ice, tatm_ice |
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| 37 | !OLI_CODE USE phycst |
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| 38 | !OLI_CODE USE dom_ice |
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| 39 | !OLI_CODE USE dom_oce |
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| 40 | !OLI_CODE USE sbc_oce |
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| 41 | !OLI_CODE USE sbc_ice |
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| 42 | !OLI_CODE USE par_ice |
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| 43 | !OLI_CODE USE par_oce |
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| 44 | !OLI_CODE USE ice |
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| 45 | !OLI_CODE USE thd_ice |
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| 46 | !OLI_CODE USE in_out_manager |
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| 47 | !OLI_CODE USE lbclnk |
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| 48 | !OLI_CODE USE lib_mpp |
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| 49 | !OLI_CODE |
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| 50 | !OLI_CODE IMPLICIT NONE |
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| 51 | !OLI_CODE PRIVATE |
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| 52 | !OLI_CODE |
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| 53 | !OLI_CODE PUBLIC lim_mp_init |
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| 54 | !OLI_CODE PUBLIC lim_mp |
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| 55 | |
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| 56 | IMPLICIT NONE |
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| 57 | PRIVATE |
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| 58 | |
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| 59 | PUBLIC lim_mp_init ! routine called by sbcice_lim.F90 |
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| 60 | ! PUBLIC lim_mp ! routine called by sbcice_lim.F90 |
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| 61 | |
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| 62 | !! * Substitutions |
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| 63 | # include "vectopt_loop_substitute.h90" |
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| 64 | !!---------------------------------------------------------------------- |
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| 65 | !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011) |
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| 66 | !! $Id: limdyn.F90 6994 2016-10-05 13:07:10Z clem $ |
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| 67 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 68 | !!---------------------------------------------------------------------- |
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| 69 | CONTAINS |
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| 70 | |
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| 71 | SUBROUTINE lim_mp_init |
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| 72 | !!------------------------------------------------------------------- |
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| 73 | !! *** ROUTINE lim_mp_init *** |
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| 74 | !! |
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| 75 | !! ** Purpose : Physical constants and parameters linked to melt ponds |
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| 76 | !! over sea ice |
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| 77 | !! |
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| 78 | !! ** Method : Read the namicemp namelist and check the melt pond |
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| 79 | !! parameter values called at the first timestep (nit000) |
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| 80 | !! |
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| 81 | !! ** input : Namelist namicemp |
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| 82 | !!------------------------------------------------------------------- |
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| 83 | INTEGER :: ios ! Local integer output status for namelist read |
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| 84 | NAMELIST/namicemp/ ln_limMP, nn_limMP |
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| 85 | !!------------------------------------------------------------------- |
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| 86 | |
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| 87 | REWIND( numnam_ice_ref ) ! Namelist namicemp in reference namelist : Melt Ponds |
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| 88 | READ ( numnam_ice_ref, namicemp, IOSTAT = ios, ERR = 901) |
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| 89 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namicemp in reference namelist', lwp ) |
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| 90 | |
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| 91 | REWIND( numnam_ice_cfg ) ! Namelist namicemp in configuration namelist : Melt Ponds |
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| 92 | READ ( numnam_ice_cfg, namicemp, IOSTAT = ios, ERR = 902 ) |
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| 93 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namicemp in configuration namelist', lwp ) |
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| 94 | IF(lwm) WRITE ( numoni, namicemp ) |
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| 95 | |
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| 96 | IF(lwp) THEN ! control print |
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| 97 | WRITE(numout,*) |
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| 98 | WRITE(numout,*) 'lim_mp_init : ice parameters for melt ponds' |
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| 99 | WRITE(numout,*) '~~~~~~~~~~~~' |
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| 100 | WRITE(numout,*)' Activate melt ponds ln_limMP = ', ln_limMP |
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| 101 | WRITE(numout,*)' Type of melt pond implementation (1=all,2=rad, 3=fw, 4=no) nn_limMP = ', nn_limMP |
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| 102 | ENDIF |
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| 103 | ! |
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| 104 | END SUBROUTINE lim_mp_init |
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| 105 | |
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| 106 | #else |
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| 107 | !!---------------------------------------------------------------------- |
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| 108 | !! Default option Empty module NO LIM sea-ice model |
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| 109 | !!---------------------------------------------------------------------- |
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| 110 | CONTAINS |
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| 111 | SUBROUTINE lim_mp_init ! Empty routine |
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| 112 | END SUBROUTINE lim_mp_init |
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| 113 | #endif |
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| 114 | |
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| 115 | !!====================================================================== |
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| 116 | END MODULE limmp |
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| 117 | |
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| 118 | !====================================================================================================================================================== |
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| 119 | !====================================================================================================================================================== |
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| 120 | !====================================================================================================================================================== |
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| 121 | ! DIRTY LEFT OVERS FROM ASSHOLES |
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| 122 | ! |
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| 123 | ! SUBROUTINE lim_dyn( kt ) |
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| 124 | ! !!------------------------------------------------------------------- |
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| 125 | ! !! *** ROUTINE lim_dyn *** |
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| 126 | ! !! |
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| 127 | ! !! ** Purpose : compute ice velocity |
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| 128 | ! !! |
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| 129 | ! !! ** Method : |
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| 130 | ! !! |
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| 131 | ! !! ** Action : - Initialisation |
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| 132 | ! !! - Call of the dynamic routine for each hemisphere |
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| 133 | ! !!------------------------------------------------------------------------------------ |
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| 134 | ! INTEGER, INTENT(in) :: kt ! number of iteration |
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| 135 | ! !! |
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| 136 | ! INTEGER :: jl, jk ! dummy loop indices |
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| 137 | ! REAL(wp) :: zvi_b, zsmv_b, zei_b, zfs_b, zfw_b, zft_b |
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| 138 | ! !!--------------------------------------------------------------------- |
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| 139 | |
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| 140 | ! IF( nn_timing == 1 ) CALL timing_start('limdyn') |
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| 141 | |
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| 142 | ! CALL lim_var_agg(1) ! aggregate ice categories |
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| 143 | ! |
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| 144 | ! ! conservation test |
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| 145 | ! IF( ln_limdiachk ) CALL lim_cons_hsm(0, 'limdyn', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) |
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| 146 | ! END SUBROUTINE lim_dyn |
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| 147 | |
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| 148 | !OLI_CODE MODULE limmp_topo |
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| 149 | !OLI_CODE !!====================================================================== |
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| 150 | !OLI_CODE !! *** MODULE limmp_topo *** |
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| 151 | !OLI_CODE !! LIM-3 sea-ice : computation of melt ponds' properties |
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| 152 | !OLI_CODE !!====================================================================== |
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| 153 | !OLI_CODE !! History : Original code by Daniela Flocco and Adrian Turner |
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| 154 | !OLI_CODE !! ! 2012-09 (O. Lecomte) Adaptation for routine inclusion in |
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| 155 | !OLI_CODE !! NEMO-LIM3.1 |
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| 156 | !OLI_CODE !! ! 2016-11 (O. Lecomte, C. Rousset, M. Vancoppenolle) |
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| 157 | !OLI_CODE !! Adaptation for merge with NEMO-LIM3.6 |
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| 158 | !OLI_CODE !!---------------------------------------------------------------------- |
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| 159 | !OLI_CODE #if defined key_lim3 |
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| 160 | !OLI_CODE !!---------------------------------------------------------------------- |
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| 161 | !OLI_CODE !! 'key_lim3' LIM-3 sea-ice model |
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| 162 | !OLI_CODE !!---------------------------------------------------------------------- |
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| 163 | !OLI_CODE !! lim_mp_init : melt pond properties initialization |
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| 164 | !OLI_CODE !! lim_mp : melt pond routine caller |
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| 165 | !OLI_CODE !! compute_mp_topo : Actual melt pond routine |
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| 166 | !OLI_CODE !!---------------------------------------------------------------------- |
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| 167 | !OLI_CODE USE ice_oce, ONLY: rdt_ice, tatm_ice |
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| 168 | !OLI_CODE USE phycst |
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| 169 | !OLI_CODE USE dom_ice |
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| 170 | !OLI_CODE USE dom_oce |
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| 171 | !OLI_CODE USE sbc_oce |
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| 172 | !OLI_CODE USE sbc_ice |
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| 173 | !OLI_CODE USE par_ice |
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| 174 | !OLI_CODE USE par_oce |
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| 175 | !OLI_CODE USE ice |
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| 176 | !OLI_CODE USE thd_ice |
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| 177 | !OLI_CODE USE in_out_manager |
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| 178 | !OLI_CODE USE lbclnk |
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| 179 | !OLI_CODE USE lib_mpp |
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| 180 | !OLI_CODE |
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| 181 | !OLI_CODE IMPLICIT NONE |
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| 182 | !OLI_CODE PRIVATE |
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| 183 | !OLI_CODE |
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| 184 | !OLI_CODE PUBLIC lim_mp_init |
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| 185 | !OLI_CODE PUBLIC lim_mp |
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| 186 | !OLI_CODE |
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| 187 | !OLI_CODE CONTAINS |
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| 188 | !OLI_CODE |
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| 189 | !OLI_CODE SUBROUTINE lim_mp_init |
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| 190 | !OLI_CODE !!------------------------------------------------------------------- |
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| 191 | !OLI_CODE !! *** ROUTINE lim_mp_init *** |
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| 192 | !OLI_CODE !! |
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| 193 | !OLI_CODE !! ** Purpose : Initialize melt ponds |
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| 194 | !OLI_CODE !!------------------------------------------------------------------- |
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| 195 | !OLI_CODE a_ip_frac(:,:,:) = 0._wp |
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| 196 | !OLI_CODE a_ip(:,:,:) = 0._wp |
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| 197 | !OLI_CODE h_ip(:,:,:) = 0._wp |
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| 198 | !OLI_CODE v_ip(:,:,:) = 0._wp |
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| 199 | !OLI_CODE h_il(:,:,:) = 0._wp |
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| 200 | !OLI_CODE v_il(:,:,:) = 0._wp |
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| 201 | !OLI_CODE |
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| 202 | !OLI_CODE END SUBROUTINE lim_mp_init |
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| 203 | !OLI_CODE |
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| 204 | !OLI_CODE |
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| 205 | !OLI_CODE SUBROUTINE lim_mp |
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| 206 | !OLI_CODE !!------------------------------------------------------------------- |
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| 207 | !OLI_CODE !! *** ROUTINE lim_mp *** |
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| 208 | !OLI_CODE !! |
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| 209 | !OLI_CODE !! ** Purpose : Compute surface heat flux and call main melt pond |
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| 210 | !OLI_CODE !! routine |
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| 211 | !OLI_CODE !!------------------------------------------------------------------- |
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| 212 | !OLI_CODE |
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| 213 | !OLI_CODE INTEGER :: ji, jj, jl ! dummy loop indices |
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| 214 | !OLI_CODE |
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| 215 | !OLI_CODE fsurf(:,:) = 0.e0 |
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| 216 | !OLI_CODE DO jl = 1, jpl |
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| 217 | !OLI_CODE DO jj = 1, jpj |
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| 218 | !OLI_CODE DO ji = 1, jpi |
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| 219 | !OLI_CODE fsurf(ji,jj) = fsurf(ji,jj) + a_i(ji,jj,jl) * & |
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| 220 | !OLI_CODE (qns_ice(ji,jj,jl) + (1.0 - izero(ji,jj,jl)) & |
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| 221 | !OLI_CODE * qsr_ice(ji,jj,jl)) |
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| 222 | !OLI_CODE END DO |
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| 223 | !OLI_CODE END DO |
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| 224 | !OLI_CODE END DO |
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| 225 | !OLI_CODE |
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| 226 | !OLI_CODE CALL compute_mp_topo(at_i, a_i, & |
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| 227 | !OLI_CODE vt_i, v_i, v_s, rhosn_glo, t_i, s_i, a_ip_frac, & |
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| 228 | !OLI_CODE h_ip, h_il, t_su, tatm_ice, diag_sur_me*rdt_ice, & |
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| 229 | !OLI_CODE fsurf, fwoc) |
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| 230 | !OLI_CODE |
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| 231 | !OLI_CODE at_ip(:,:) = 0.0 |
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| 232 | !OLI_CODE vt_ip(:,:) = 0.0 |
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| 233 | !OLI_CODE vt_il(:,:) = 0.0 |
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| 234 | !OLI_CODE DO jl = 1, jpl |
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| 235 | !OLI_CODE DO jj = 1, jpj |
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| 236 | !OLI_CODE DO ji = 1, jpi |
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| 237 | !OLI_CODE a_ip(ji,jj,jl) = MAX(0.0_wp, a_ip_frac(ji,jj,jl) * & |
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| 238 | !OLI_CODE a_i(ji,jj,jl)) |
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| 239 | !OLI_CODE v_ip(ji,jj,jl) = MAX(0.0_wp, a_ip_frac(ji,jj,jl) * & |
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| 240 | !OLI_CODE a_i(ji,jj,jl) * h_ip(ji,jj,jl)) |
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| 241 | !OLI_CODE v_il(ji,jj,jl) = MAX(0.0_wp, a_ip_frac(ji,jj,jl) * & |
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| 242 | !OLI_CODE a_i(ji,jj,jl) * h_il(ji,jj,jl)) |
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| 243 | !OLI_CODE at_ip(ji,jj) = at_ip(ji,jj) + a_ip(ji,jj,jl) |
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| 244 | !OLI_CODE vt_ip(ji,jj) = vt_ip(ji,jj) + v_ip(ji,jj,jl) |
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| 245 | !OLI_CODE vt_il(ji,jj) = vt_il(ji,jj) + v_il(ji,jj,jl) |
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| 246 | !OLI_CODE END DO |
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| 247 | !OLI_CODE END DO |
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| 248 | !OLI_CODE END DO |
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| 249 | !OLI_CODE |
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| 250 | !OLI_CODE END SUBROUTINE lim_mp |
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| 251 | !OLI_CODE |
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| 252 | !OLI_CODE |
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| 253 | !OLI_CODE SUBROUTINE compute_mp_topo(aice, aicen, & |
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| 254 | !OLI_CODE vice, vicen, & |
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| 255 | !OLI_CODE vsnon, rhos, & |
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| 256 | !OLI_CODE ticen, salin, & |
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| 257 | !OLI_CODE a_ip_frac, h_ip, & |
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| 258 | !OLI_CODE h_il, Tsfc, & |
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| 259 | !OLI_CODE potT, meltt, & |
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| 260 | !OLI_CODE fsurf, fwoc) |
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| 261 | !OLI_CODE !!------------------------------------------------------------------- |
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| 262 | !OLI_CODE !! *** ROUTINE compute_mp_topo *** |
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| 263 | !OLI_CODE !! |
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| 264 | !OLI_CODE !! ** Purpose : Compute melt pond evolution based on the ice |
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| 265 | !OLI_CODE !! topography as inferred from the ice thickness |
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| 266 | !OLI_CODE !! distribution. |
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| 267 | !OLI_CODE !! |
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| 268 | !OLI_CODE !! ** Method : This code is initially based on Flocco and Feltham |
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| 269 | !OLI_CODE !! (2007) and Flocco et al. (2010). More to come... |
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| 270 | !OLI_CODE !! |
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| 271 | !OLI_CODE !! ** Tunable parameters : |
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| 272 | !OLI_CODE !! |
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| 273 | !OLI_CODE !! ** Note : |
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| 274 | !OLI_CODE !! |
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| 275 | !OLI_CODE !! ** References |
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| 276 | !OLI_CODE !! Flocco, D. and D. L. Feltham, 2007. A continuum model of melt pond |
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| 277 | !OLI_CODE !! evolution on Arctic sea ice. J. Geophys. Res. 112, C08016, doi: |
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| 278 | !OLI_CODE !! 10.1029/2006JC003836. |
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| 279 | !OLI_CODE !! Flocco, D., D. L. Feltham and A. K. Turner, 2010. Incorporation of |
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| 280 | !OLI_CODE !! a physically based melt pond scheme into the sea ice component of a |
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| 281 | !OLI_CODE !! climate model. J. Geophys. Res. 115, C08012, |
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| 282 | !OLI_CODE !! doi: 10.1029/2009JC005568. |
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| 283 | !OLI_CODE !! |
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| 284 | !OLI_CODE !!------------------------------------------------------------------- |
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| 285 | !OLI_CODE |
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| 286 | !OLI_CODE REAL (wp), DIMENSION (jpi,jpj), & |
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| 287 | !OLI_CODE INTENT(IN) :: & |
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| 288 | !OLI_CODE aice, & ! total ice area fraction |
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| 289 | !OLI_CODE vice ! total ice volume (m) |
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| 290 | !OLI_CODE |
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| 291 | !OLI_CODE REAL (wp), DIMENSION (jpi,jpj,jpl), & |
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| 292 | !OLI_CODE INTENT(IN) :: & |
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| 293 | !OLI_CODE aicen, & ! ice area fraction, per category |
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| 294 | !OLI_CODE vsnon, & ! snow volume, per category (m) |
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| 295 | !OLI_CODE rhos, & ! equivalent snow density, per category (kg/m^3) |
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| 296 | !OLI_CODE vicen ! ice volume, per category (m) |
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| 297 | !OLI_CODE |
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| 298 | !OLI_CODE REAL (wp), DIMENSION (jpi,jpj,nlay_i,jpl), & |
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| 299 | !OLI_CODE INTENT(IN) :: & |
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| 300 | !OLI_CODE ticen, & ! ice enthalpy, per category |
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| 301 | !OLI_CODE salin |
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| 302 | !OLI_CODE |
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| 303 | !OLI_CODE REAL (wp), DIMENSION (jpi,jpj,jpl), & |
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| 304 | !OLI_CODE INTENT(INOUT) :: & |
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| 305 | !OLI_CODE a_ip_frac , & ! pond area fraction of ice, per ice category |
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| 306 | !OLI_CODE h_ip , & ! pond depth, per ice category (m) |
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| 307 | !OLI_CODE h_il ! Refrozen ice lid thickness, per ice category (m) |
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| 308 | !OLI_CODE |
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| 309 | !OLI_CODE REAL (wp), DIMENSION (jpi,jpj), & |
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| 310 | !OLI_CODE INTENT(IN) :: & |
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| 311 | !OLI_CODE potT, & ! air potential temperature |
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| 312 | !OLI_CODE meltt, & ! total surface meltwater flux |
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| 313 | !OLI_CODE fsurf ! thermodynamic heat flux at ice/snow surface (W/m^2) |
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| 314 | !OLI_CODE |
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| 315 | !OLI_CODE REAL (wp), DIMENSION (jpi,jpj), & |
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| 316 | !OLI_CODE INTENT(INOUT) :: & |
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| 317 | !OLI_CODE fwoc ! fresh water flux to the ocean (from draining and other pond volume adjustments) |
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| 318 | !OLI_CODE ! (m) |
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| 319 | !OLI_CODE |
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| 320 | !OLI_CODE REAL (wp), DIMENSION (jpi,jpj,jpl), & |
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| 321 | !OLI_CODE INTENT(IN) :: & |
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| 322 | !OLI_CODE Tsfc ! snow/sea ice surface temperature |
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| 323 | !OLI_CODE |
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| 324 | !OLI_CODE ! local variables |
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| 325 | !OLI_CODE REAL (wp), DIMENSION (jpi,jpj,jpl) :: & |
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| 326 | !OLI_CODE zTsfcn, & ! ice/snow surface temperature (C) |
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| 327 | !OLI_CODE zvolpn, & ! pond volume per unit area, per category (m) |
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| 328 | !OLI_CODE zvuin ! water-equivalent volume of ice lid on melt pond ('upper ice', m) |
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| 329 | !OLI_CODE |
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| 330 | !OLI_CODE REAL (wp), DIMENSION (jpi,jpj,jpl) :: & |
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| 331 | !OLI_CODE zapondn,& ! pond area fraction, per category |
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| 332 | !OLI_CODE zhpondn ! pond depth, per category (m) |
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| 333 | !OLI_CODE |
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| 334 | !OLI_CODE REAL (wp), DIMENSION (jpi,jpj) :: & |
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| 335 | !OLI_CODE zvolp ! total volume of pond, per unit area of pond (m) |
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| 336 | !OLI_CODE |
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| 337 | !OLI_CODE REAL (wp) :: & |
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| 338 | !OLI_CODE zhi, & ! ice thickness (m) |
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| 339 | !OLI_CODE zdHui, & ! change in thickness of ice lid (m) |
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| 340 | !OLI_CODE zomega, & ! conduction |
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| 341 | !OLI_CODE zdTice, & ! temperature difference across ice lid (C) |
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| 342 | !OLI_CODE zdvice, & ! change in ice volume (m) |
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| 343 | !OLI_CODE zTavg, & ! mean surface temperature across categories (C) |
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| 344 | !OLI_CODE zTp, & ! pond freezing temperature (C) |
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| 345 | !OLI_CODE zdvn ! change in melt pond volume for fresh water budget |
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| 346 | !OLI_CODE INTEGER, DIMENSION (jpi*jpj) :: & |
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| 347 | !OLI_CODE indxi, indxj ! compressed indices for cells with ice melting |
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| 348 | !OLI_CODE |
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| 349 | !OLI_CODE INTEGER :: n,k,i,j,ij,icells,indxij ! loop indices |
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| 350 | !OLI_CODE |
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| 351 | !OLI_CODE INTEGER, DIMENSION (jpl) :: & |
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| 352 | !OLI_CODE kcells ! cells where ice lid combines with vice |
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| 353 | !OLI_CODE |
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| 354 | !OLI_CODE INTEGER, DIMENSION (jpi*jpj,jpl) :: & |
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| 355 | !OLI_CODE indxii, indxjj ! i,j indices for kcells loop |
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| 356 | !OLI_CODE |
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| 357 | !OLI_CODE REAL (wp), parameter :: & |
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| 358 | !OLI_CODE zhicemin = 0.1_wp , & ! minimum ice thickness with ponds (m) |
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| 359 | !OLI_CODE zTd = 0.15_wp, & ! temperature difference for freeze-up (C) |
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| 360 | !OLI_CODE zr1_rlfus = 1._wp / 0.334e+6 / 917._wp , & ! (J/m^3) |
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| 361 | !OLI_CODE zmin_volp = 1.e-4_wp, & ! minimum pond volume (m) |
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| 362 | !OLI_CODE z0 = 0._wp, & |
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| 363 | !OLI_CODE zTimelt = 0._wp, & |
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| 364 | !OLI_CODE z01 = 0.01_wp, & |
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| 365 | !OLI_CODE z25 = 0.25_wp, & |
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| 366 | !OLI_CODE z5 = 0.5_wp, & |
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| 367 | !OLI_CODE zuny = 1.0e-11_wp |
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| 368 | !OLI_CODE !--------------------------------------------------------------- |
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| 369 | !OLI_CODE ! initialize |
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| 370 | !OLI_CODE !--------------------------------------------------------------- |
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| 371 | !OLI_CODE |
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| 372 | !OLI_CODE DO j = 1, jpj |
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| 373 | !OLI_CODE DO i = 1, jpi |
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| 374 | !OLI_CODE zvolp(i,j) = z0 |
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| 375 | !OLI_CODE END DO |
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| 376 | !OLI_CODE END DO |
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| 377 | !OLI_CODE DO n = 1, jpl |
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| 378 | !OLI_CODE DO j = 1, jpj |
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| 379 | !OLI_CODE DO i = 1, jpi |
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| 380 | !OLI_CODE ! load tracers |
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| 381 | !OLI_CODE zvolp(i,j) = zvolp(i,j) + h_ip(i,j,n) & |
---|
| 382 | !OLI_CODE * a_ip_frac(i,j,n) * aicen(i,j,n) |
---|
| 383 | !OLI_CODE zTsfcn(i,j,n) = Tsfc(i,j,n) - rtt ! convert in Celsius - Oli |
---|
| 384 | !OLI_CODE zvuin (i,j,n) = h_il(i,j,n) & |
---|
| 385 | !OLI_CODE * a_ip_frac(i,j,n) * aicen(i,j,n) |
---|
| 386 | !OLI_CODE |
---|
| 387 | !OLI_CODE zhpondn(i,j,n) = z0 ! pond depth, per category |
---|
| 388 | !OLI_CODE zapondn(i,j,n) = z0 ! pond area, per category |
---|
| 389 | !OLI_CODE END DO |
---|
| 390 | !OLI_CODE END DO |
---|
| 391 | !OLI_CODE indxii(:,n) = 0 |
---|
| 392 | !OLI_CODE indxjj(:,n) = 0 |
---|
| 393 | !OLI_CODE kcells (n) = 0 |
---|
| 394 | !OLI_CODE END DO |
---|
| 395 | !OLI_CODE |
---|
| 396 | !OLI_CODE ! The freezing temperature for meltponds is assumed slightly below 0C, |
---|
| 397 | !OLI_CODE ! as if meltponds had a little salt in them. The salt budget is not |
---|
| 398 | !OLI_CODE ! altered for meltponds, but if it were then an actual pond freezing |
---|
| 399 | !OLI_CODE ! temperature could be computed. |
---|
| 400 | !OLI_CODE |
---|
| 401 | !OLI_CODE zTp = zTimelt - zTd |
---|
| 402 | !OLI_CODE |
---|
| 403 | !OLI_CODE !----------------------------------------------------------------- |
---|
| 404 | !OLI_CODE ! Identify grid cells with ponds |
---|
| 405 | !OLI_CODE !----------------------------------------------------------------- |
---|
| 406 | !OLI_CODE |
---|
| 407 | !OLI_CODE icells = 0 |
---|
| 408 | !OLI_CODE DO j = 1, jpj |
---|
| 409 | !OLI_CODE DO i = 1, jpi |
---|
| 410 | !OLI_CODE zhi = z0 |
---|
| 411 | !OLI_CODE IF (aice(i,j) > zuny) zhi = vice(i,j)/aice(i,j) |
---|
| 412 | !OLI_CODE IF ( aice(i,j) > z01 .and. zhi > zhicemin .and. & |
---|
| 413 | !OLI_CODE zvolp(i,j) > zmin_volp*aice(i,j)) THEN |
---|
| 414 | !OLI_CODE icells = icells + 1 |
---|
| 415 | !OLI_CODE indxi(icells) = i |
---|
| 416 | !OLI_CODE indxj(icells) = j |
---|
| 417 | !OLI_CODE ELSE ! remove ponds on thin ice |
---|
| 418 | !OLI_CODE !fpond(i,j) = fpond(i,j) - zvolp(i,j) |
---|
| 419 | !OLI_CODE zvolpn(i,j,:) = z0 |
---|
| 420 | !OLI_CODE zvuin (i,j,:) = z0 |
---|
| 421 | !OLI_CODE zvolp (i,j) = z0 |
---|
| 422 | !OLI_CODE END IF |
---|
| 423 | !OLI_CODE END DO ! i |
---|
| 424 | !OLI_CODE END DO ! j |
---|
| 425 | !OLI_CODE |
---|
| 426 | !OLI_CODE DO ij = 1, icells |
---|
| 427 | !OLI_CODE i = indxi(ij) |
---|
| 428 | !OLI_CODE j = indxj(ij) |
---|
| 429 | !OLI_CODE |
---|
| 430 | !OLI_CODE !-------------------------------------------------------------- |
---|
| 431 | !OLI_CODE ! calculate pond area and depth |
---|
| 432 | !OLI_CODE !-------------------------------------------------------------- |
---|
| 433 | !OLI_CODE CALL pond_area(aice(i,j),vice(i,j),rhos(i,j,:), & |
---|
| 434 | !OLI_CODE aicen(i,j,:), vicen(i,j,:), vsnon(i,j,:), & |
---|
| 435 | !OLI_CODE ticen(i,j,:,:), salin(i,j,:,:), & |
---|
| 436 | !OLI_CODE zvolpn(i,j,:), zvolp(i,j), & |
---|
| 437 | !OLI_CODE zapondn(i,j,:),zhpondn(i,j,:), zdvn) |
---|
| 438 | !OLI_CODE |
---|
| 439 | !OLI_CODE fwoc(i,j) = fwoc(i,j) + zdvn ! -> Goes to fresh water budget |
---|
| 440 | !OLI_CODE |
---|
| 441 | !OLI_CODE ! mean surface temperature |
---|
| 442 | !OLI_CODE zTavg = z0 |
---|
| 443 | !OLI_CODE DO n = 1, jpl |
---|
| 444 | !OLI_CODE zTavg = zTavg + zTsfcn(i,j,n)*aicen(i,j,n) |
---|
| 445 | !OLI_CODE END DO |
---|
| 446 | !OLI_CODE zTavg = zTavg / aice(i,j) |
---|
| 447 | !OLI_CODE |
---|
| 448 | !OLI_CODE DO n = 1, jpl-1 |
---|
| 449 | !OLI_CODE |
---|
| 450 | !OLI_CODE IF (zvuin(i,j,n) > zuny) THEN |
---|
| 451 | !OLI_CODE |
---|
| 452 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 453 | !OLI_CODE ! melting: floating upper ice layer melts in whole or part |
---|
| 454 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 455 | !OLI_CODE ! IF (zTsfcn(i,j,n) > zTp) THEN |
---|
| 456 | !OLI_CODE IF (zTavg > zTp) THEN |
---|
| 457 | !OLI_CODE |
---|
| 458 | !OLI_CODE zdvice = min(meltt(i,j)*zapondn(i,j,n), zvuin(i,j,n)) |
---|
| 459 | !OLI_CODE IF (zdvice > zuny) THEN |
---|
| 460 | !OLI_CODE zvuin (i,j,n) = zvuin (i,j,n) - zdvice |
---|
| 461 | !OLI_CODE zvolpn(i,j,n) = zvolpn(i,j,n) + zdvice |
---|
| 462 | !OLI_CODE zvolp (i,j) = zvolp (i,j) + zdvice |
---|
| 463 | !OLI_CODE !fwoc(i,j) = fwoc(i,j) + zdvice |
---|
| 464 | !OLI_CODE |
---|
| 465 | !OLI_CODE IF (zvuin(i,j,n) < zuny .and. zvolpn(i,j,n) > puny) THEN |
---|
| 466 | !OLI_CODE ! ice lid melted and category is pond covered |
---|
| 467 | !OLI_CODE zvolpn(i,j,n) = zvolpn(i,j,n) + zvuin(i,j,n) |
---|
| 468 | !OLI_CODE !fwoc(i,j) = fwoc(i,j) + zvuin(i,j,n) |
---|
| 469 | !OLI_CODE zvuin(i,j,n) = z0 |
---|
| 470 | !OLI_CODE END IF |
---|
| 471 | !OLI_CODE zhpondn(i,j,n) = zvolpn(i,j,n) / zapondn(i,j,n) |
---|
| 472 | !OLI_CODE END IF |
---|
| 473 | !OLI_CODE |
---|
| 474 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 475 | !OLI_CODE ! freezing: existing upper ice layer grows |
---|
| 476 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 477 | !OLI_CODE ELSE IF (zvolpn(i,j,n) > zuny) THEN ! zTavg <= zTp |
---|
| 478 | !OLI_CODE |
---|
| 479 | !OLI_CODE ! dIFferential growth of base of surface floating ice layer |
---|
| 480 | !OLI_CODE zdTice = max(-zTavg, z0) ! > 0 |
---|
| 481 | !OLI_CODE zomega = rcdic*zdTice * zr1_rlfus |
---|
| 482 | !OLI_CODE zdHui = sqrt(zomega*rdt_ice + z25*(zvuin(i,j,n)/ & |
---|
| 483 | !OLI_CODE aicen(i,j,n))**2)- z5 * zvuin(i,j,n)/aicen(i,j,n) |
---|
| 484 | !OLI_CODE |
---|
| 485 | !OLI_CODE zdvice = min(zdHui*zapondn(i,j,n), zvolpn(i,j,n)) |
---|
| 486 | !OLI_CODE IF (zdvice > zuny) THEN |
---|
| 487 | !OLI_CODE zvuin (i,j,n) = zvuin (i,j,n) + zdvice |
---|
| 488 | !OLI_CODE zvolpn(i,j,n) = zvolpn(i,j,n) - zdvice |
---|
| 489 | !OLI_CODE zvolp (i,j) = zvolp (i,j) - zdvice |
---|
| 490 | !OLI_CODE !fwoc(i,j) = fwoc(i,j) - zdvice |
---|
| 491 | !OLI_CODE zhpondn(i,j,n) = zvolpn(i,j,n) / zapondn(i,j,n) |
---|
| 492 | !OLI_CODE END IF |
---|
| 493 | !OLI_CODE |
---|
| 494 | !OLI_CODE END IF ! zTavg |
---|
| 495 | !OLI_CODE |
---|
| 496 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 497 | !OLI_CODE ! freezing: upper ice layer begins to form |
---|
| 498 | !OLI_CODE ! note: albedo does not change |
---|
| 499 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 500 | !OLI_CODE ELSE ! zvuin < zuny |
---|
| 501 | !OLI_CODE |
---|
| 502 | !OLI_CODE ! thickness of newly formed ice |
---|
| 503 | !OLI_CODE ! the surface temperature of a meltpond is the same as that |
---|
| 504 | !OLI_CODE ! of the ice underneath (0C), and the thermodynamic surface |
---|
| 505 | !OLI_CODE ! flux is the same |
---|
| 506 | !OLI_CODE zdHui = max(-fsurf(i,j)*rdt_ice*zr1_rlfus, z0) |
---|
| 507 | !OLI_CODE zdvice = min(zdHui*zapondn(i,j,n), zvolpn(i,j,n)) |
---|
| 508 | !OLI_CODE IF (zdvice > zuny) THEN |
---|
| 509 | !OLI_CODE zvuin (i,j,n) = zdvice |
---|
| 510 | !OLI_CODE zvolpn(i,j,n) = zvolpn(i,j,n) - zdvice |
---|
| 511 | !OLI_CODE zvolp (i,j) = zvolp (i,j) - zdvice |
---|
| 512 | !OLI_CODE !fwoc(i,j) = fwoc(i,j) - zdvice |
---|
| 513 | !OLI_CODE zhpondn(i,j,n)= zvolpn(i,j,n) / zapondn(i,j,n) |
---|
| 514 | !OLI_CODE END IF |
---|
| 515 | !OLI_CODE |
---|
| 516 | !OLI_CODE END IF ! zvuin |
---|
| 517 | !OLI_CODE |
---|
| 518 | !OLI_CODE END DO ! jpl |
---|
| 519 | !OLI_CODE |
---|
| 520 | !OLI_CODE END DO ! ij |
---|
| 521 | !OLI_CODE |
---|
| 522 | !OLI_CODE !--------------------------------------------------------------- |
---|
| 523 | !OLI_CODE ! remove ice lid if there is no liquid pond |
---|
| 524 | !OLI_CODE ! zvuin may be nonzero on category jpl due to dynamics |
---|
| 525 | !OLI_CODE !--------------------------------------------------------------- |
---|
| 526 | !OLI_CODE |
---|
| 527 | !OLI_CODE DO j = 1, jpj |
---|
| 528 | !OLI_CODE DO i = 1, jpi |
---|
| 529 | !OLI_CODE DO n = 1, jpl |
---|
| 530 | !OLI_CODE IF (aicen(i,j,n) > zuny .and. zvolpn(i,j,n) < puny & |
---|
| 531 | !OLI_CODE .and. zvuin (i,j,n) > zuny) THEN |
---|
| 532 | !OLI_CODE kcells(n) = kcells(n) + 1 |
---|
| 533 | !OLI_CODE indxij = kcells(n) |
---|
| 534 | !OLI_CODE indxii(indxij,n) = i |
---|
| 535 | !OLI_CODE indxjj(indxij,n) = j |
---|
| 536 | !OLI_CODE END IF |
---|
| 537 | !OLI_CODE END DO |
---|
| 538 | !OLI_CODE END DO ! i |
---|
| 539 | !OLI_CODE END DO ! j |
---|
| 540 | !OLI_CODE |
---|
| 541 | !OLI_CODE DO n = 1, jpl |
---|
| 542 | !OLI_CODE |
---|
| 543 | !OLI_CODE IF (kcells(n) > 0) THEN |
---|
| 544 | !OLI_CODE DO ij = 1, kcells(n) |
---|
| 545 | !OLI_CODE i = indxii(ij,n) |
---|
| 546 | !OLI_CODE j = indxjj(ij,n) |
---|
| 547 | !OLI_CODE fwoc(i,j) = fwoc(i,j) + rhoic/rauw * zvuin(i,j,n) ! Completely refrozen lid goes into ocean (to be changed) |
---|
| 548 | !OLI_CODE zvuin(i,j,n) = z0 |
---|
| 549 | !OLI_CODE END DO ! ij |
---|
| 550 | !OLI_CODE END IF |
---|
| 551 | !OLI_CODE |
---|
| 552 | !OLI_CODE ! reload tracers |
---|
| 553 | !OLI_CODE DO j = 1, jpj |
---|
| 554 | !OLI_CODE DO i = 1, jpi |
---|
| 555 | !OLI_CODE IF (zapondn(i,j,n) > zuny) THEN |
---|
| 556 | !OLI_CODE h_il(i,j,n) = zvuin(i,j,n) / zapondn(i,j,n) |
---|
| 557 | !OLI_CODE ELSE |
---|
| 558 | !OLI_CODE zvuin(i,j,n) = z0 |
---|
| 559 | !OLI_CODE h_il(i,j,n) = z0 |
---|
| 560 | !OLI_CODE END IF |
---|
| 561 | !OLI_CODE IF (aicen(i,j,n) > zuny) THEN |
---|
| 562 | !OLI_CODE a_ip_frac(i,j,n) = zapondn(i,j,n) / aicen(i,j,n) * & |
---|
| 563 | !OLI_CODE (1.0_wp - MAX(z0, SIGN(1.0_wp, -zvolpn(i,j,n)))) |
---|
| 564 | !OLI_CODE h_ip(i,j,n) = zhpondn(i,j,n) |
---|
| 565 | !OLI_CODE ELSE |
---|
| 566 | !OLI_CODE a_ip_frac(i,j,n) = z0 |
---|
| 567 | !OLI_CODE h_ip(i,j,n) = z0 |
---|
| 568 | !OLI_CODE h_il(i,j,n) = z0 |
---|
| 569 | !OLI_CODE END IF |
---|
| 570 | !OLI_CODE END DO ! i |
---|
| 571 | !OLI_CODE END DO ! j |
---|
| 572 | !OLI_CODE |
---|
| 573 | !OLI_CODE END DO ! n |
---|
| 574 | !OLI_CODE |
---|
| 575 | !OLI_CODE END SUBROUTINE compute_mp_topo |
---|
| 576 | !OLI_CODE |
---|
| 577 | !OLI_CODE |
---|
| 578 | !OLI_CODE SUBROUTINE pond_area(aice,vice,rhos, & |
---|
| 579 | !OLI_CODE aicen, vicen, vsnon, ticen, & |
---|
| 580 | !OLI_CODE salin, zvolpn, zvolp, & |
---|
| 581 | !OLI_CODE zapondn,zhpondn,dvolp) |
---|
| 582 | !OLI_CODE !!------------------------------------------------------------------- |
---|
| 583 | !OLI_CODE !! *** ROUTINE pond_area *** |
---|
| 584 | !OLI_CODE !! |
---|
| 585 | !OLI_CODE !! ** Purpose : Compute melt pond area, depth and melting rates |
---|
| 586 | !OLI_CODE !!------------------------------------------------------------------ |
---|
| 587 | !OLI_CODE REAL (wp), INTENT(IN) :: & |
---|
| 588 | !OLI_CODE aice,vice |
---|
| 589 | !OLI_CODE |
---|
| 590 | !OLI_CODE REAL (wp), DIMENSION(jpl), INTENT(IN) :: & |
---|
| 591 | !OLI_CODE aicen, vicen, vsnon, rhos |
---|
| 592 | !OLI_CODE |
---|
| 593 | !OLI_CODE REAL (wp), DIMENSION(nlay_i,jpl), INTENT(IN) :: & |
---|
| 594 | !OLI_CODE ticen, salin |
---|
| 595 | !OLI_CODE |
---|
| 596 | !OLI_CODE REAL (wp), DIMENSION(jpl), INTENT(INOUT) :: & |
---|
| 597 | !OLI_CODE zvolpn |
---|
| 598 | !OLI_CODE |
---|
| 599 | !OLI_CODE REAL (wp), INTENT(INOUT) :: & |
---|
| 600 | !OLI_CODE zvolp, dvolp |
---|
| 601 | !OLI_CODE |
---|
| 602 | !OLI_CODE REAL (wp), DIMENSION(jpl), INTENT(OUT) :: & |
---|
| 603 | !OLI_CODE zapondn, zhpondn |
---|
| 604 | !OLI_CODE |
---|
| 605 | !OLI_CODE INTEGER :: & |
---|
| 606 | !OLI_CODE n, ns, & |
---|
| 607 | !OLI_CODE m_index, & |
---|
| 608 | !OLI_CODE permflag |
---|
| 609 | !OLI_CODE |
---|
| 610 | !OLI_CODE REAL (wp), DIMENSION(jpl) :: & |
---|
| 611 | !OLI_CODE hicen, & |
---|
| 612 | !OLI_CODE hsnon, & |
---|
| 613 | !OLI_CODE asnon, & |
---|
| 614 | !OLI_CODE alfan, & |
---|
| 615 | !OLI_CODE betan, & |
---|
| 616 | !OLI_CODE cum_max_vol, & |
---|
| 617 | !OLI_CODE reduced_aicen |
---|
| 618 | !OLI_CODE |
---|
| 619 | !OLI_CODE REAL (wp), DIMENSION(0:jpl) :: & |
---|
| 620 | !OLI_CODE cum_max_vol_tmp |
---|
| 621 | !OLI_CODE |
---|
| 622 | !OLI_CODE REAL (wp) :: & |
---|
| 623 | !OLI_CODE hpond, & |
---|
| 624 | !OLI_CODE drain, & |
---|
| 625 | !OLI_CODE floe_weight, & |
---|
| 626 | !OLI_CODE pressure_head, & |
---|
| 627 | !OLI_CODE hsl_rel, & |
---|
| 628 | !OLI_CODE deltah, & |
---|
| 629 | !OLI_CODE perm, & |
---|
| 630 | !OLI_CODE apond, & |
---|
| 631 | !OLI_CODE msno |
---|
| 632 | !OLI_CODE |
---|
| 633 | !OLI_CODE REAL (wp), parameter :: & |
---|
| 634 | !OLI_CODE viscosity = 1.79e-3_wp, & ! kinematic water viscosity in kg/m/s |
---|
| 635 | !OLI_CODE z0 = 0.0_wp , & |
---|
| 636 | !OLI_CODE c1 = 1.0_wp , & |
---|
| 637 | !OLI_CODE p4 = 0.4_wp , & |
---|
| 638 | !OLI_CODE p6 = 0.6_wp , & |
---|
| 639 | !OLI_CODE zuny = 1.0e-11_wp |
---|
| 640 | !OLI_CODE |
---|
| 641 | !OLI_CODE !-----------| |
---|
| 642 | !OLI_CODE ! | |
---|
| 643 | !OLI_CODE ! |-----------| |
---|
| 644 | !OLI_CODE !___________|___________|______________________________________sea-level |
---|
| 645 | !OLI_CODE ! | | |
---|
| 646 | !OLI_CODE ! | |---^--------| |
---|
| 647 | !OLI_CODE ! | | | | |
---|
| 648 | !OLI_CODE ! | | | |-----------| |------- |
---|
| 649 | !OLI_CODE ! | | |alfan(n)| | | |
---|
| 650 | !OLI_CODE ! | | | | |--------------| |
---|
| 651 | !OLI_CODE ! | | | | | | |
---|
| 652 | !OLI_CODE !---------------------------v------------------------------------------- |
---|
| 653 | !OLI_CODE ! | | ^ | | | |
---|
| 654 | !OLI_CODE ! | | | | |--------------| |
---|
| 655 | !OLI_CODE ! | | |betan(n)| | | |
---|
| 656 | !OLI_CODE ! | | | |-----------| |------- |
---|
| 657 | !OLI_CODE ! | | | | |
---|
| 658 | !OLI_CODE ! | |---v------- | |
---|
| 659 | !OLI_CODE ! | | |
---|
| 660 | !OLI_CODE ! |-----------| |
---|
| 661 | !OLI_CODE ! | |
---|
| 662 | !OLI_CODE !-----------| |
---|
| 663 | !OLI_CODE |
---|
| 664 | !OLI_CODE !------------------------------------------------------------------- |
---|
| 665 | !OLI_CODE ! initialize |
---|
| 666 | !OLI_CODE !------------------------------------------------------------------- |
---|
| 667 | !OLI_CODE |
---|
| 668 | !OLI_CODE DO n = 1, jpl |
---|
| 669 | !OLI_CODE |
---|
| 670 | !OLI_CODE zapondn(n) = z0 |
---|
| 671 | !OLI_CODE zhpondn(n) = z0 |
---|
| 672 | !OLI_CODE |
---|
| 673 | !OLI_CODE IF (aicen(n) < zuny) THEN |
---|
| 674 | !OLI_CODE hicen(n) = z0 |
---|
| 675 | !OLI_CODE hsnon(n) = z0 |
---|
| 676 | !OLI_CODE reduced_aicen(n) = z0 |
---|
| 677 | !OLI_CODE ELSE |
---|
| 678 | !OLI_CODE hicen(n) = vicen(n) / aicen(n) |
---|
| 679 | !OLI_CODE hsnon(n) = vsnon(n) / aicen(n) |
---|
| 680 | !OLI_CODE reduced_aicen(n) = c1 ! n=jpl |
---|
| 681 | !OLI_CODE IF (n < jpl) reduced_aicen(n) = aicen(n) & |
---|
| 682 | !OLI_CODE * (-0.024_wp*hicen(n) + 0.832_wp) |
---|
| 683 | !OLI_CODE asnon(n) = reduced_aicen(n) |
---|
| 684 | !OLI_CODE END IF |
---|
| 685 | !OLI_CODE |
---|
| 686 | !OLI_CODE ! This choice for alfa and beta ignores hydrostatic equilibium of categories. |
---|
| 687 | !OLI_CODE ! Hydrostatic equilibium of the entire ITD is accounted for below, assuming |
---|
| 688 | !OLI_CODE ! a surface topography implied by alfa=0.6 and beta=0.4, and rigidity across all |
---|
| 689 | !OLI_CODE ! categories. alfa and beta partition the ITD - they are areas not thicknesses! |
---|
| 690 | !OLI_CODE ! Multiplying by hicen, alfan and betan (below) are thus volumes per unit area. |
---|
| 691 | !OLI_CODE ! Here, alfa = 60% of the ice area (and since hice is constant in a category, |
---|
| 692 | !OLI_CODE ! alfan = 60% of the ice volume) in each category lies above the reference line, |
---|
| 693 | !OLI_CODE ! and 40% below. Note: p6 is an arbitrary choice, but alfa+beta=1 is required. |
---|
| 694 | !OLI_CODE |
---|
| 695 | !OLI_CODE alfan(n) = p6 * hicen(n) |
---|
| 696 | !OLI_CODE betan(n) = p4 * hicen(n) |
---|
| 697 | !OLI_CODE |
---|
| 698 | !OLI_CODE cum_max_vol(n) = z0 |
---|
| 699 | !OLI_CODE cum_max_vol_tmp(n) = z0 |
---|
| 700 | !OLI_CODE |
---|
| 701 | !OLI_CODE END DO ! jpl |
---|
| 702 | !OLI_CODE |
---|
| 703 | !OLI_CODE cum_max_vol_tmp(0) = z0 |
---|
| 704 | !OLI_CODE drain = z0 |
---|
| 705 | !OLI_CODE dvolp = z0 |
---|
| 706 | !OLI_CODE |
---|
| 707 | !OLI_CODE !-------------------------------------------------------------------------- |
---|
| 708 | !OLI_CODE ! the maximum amount of water that can be contained up to each ice category |
---|
| 709 | !OLI_CODE !-------------------------------------------------------------------------- |
---|
| 710 | !OLI_CODE |
---|
| 711 | !OLI_CODE DO n = 1, jpl-1 ! last category can not hold any volume |
---|
| 712 | !OLI_CODE |
---|
| 713 | !OLI_CODE IF (alfan(n+1) >= alfan(n) .and. alfan(n+1) > z0) THEN |
---|
| 714 | !OLI_CODE |
---|
| 715 | !OLI_CODE ! total volume in level including snow |
---|
| 716 | !OLI_CODE cum_max_vol_tmp(n) = cum_max_vol_tmp(n-1) + & |
---|
| 717 | !OLI_CODE (alfan(n+1) - alfan(n)) * sum(reduced_aicen(1:n)) |
---|
| 718 | !OLI_CODE |
---|
| 719 | !OLI_CODE |
---|
| 720 | !OLI_CODE ! subtract snow solid volumes from lower categories in current level |
---|
| 721 | !OLI_CODE DO ns = 1, n |
---|
| 722 | !OLI_CODE cum_max_vol_tmp(n) = cum_max_vol_tmp(n) & |
---|
| 723 | !OLI_CODE - rhos(ns)/rauw * & ! fraction of snow that is occupied by solid ??rauw |
---|
| 724 | !OLI_CODE asnon(ns) * & ! area of snow from that category |
---|
| 725 | !OLI_CODE max(min(hsnon(ns)+alfan(ns)-alfan(n), alfan(n+1)- & |
---|
| 726 | !OLI_CODE alfan(n)), z0) |
---|
| 727 | !OLI_CODE ! thickness of snow from ns layer in n layer |
---|
| 728 | !OLI_CODE END DO |
---|
| 729 | !OLI_CODE |
---|
| 730 | !OLI_CODE ELSE ! assume higher categories unoccupied |
---|
| 731 | !OLI_CODE cum_max_vol_tmp(n) = cum_max_vol_tmp(n-1) |
---|
| 732 | !OLI_CODE END IF |
---|
| 733 | !OLI_CODE !IF (cum_max_vol_tmp(n) < z0) THEN |
---|
| 734 | !OLI_CODE ! call abort_ice('negative melt pond volume') |
---|
| 735 | !OLI_CODE !END IF |
---|
| 736 | !OLI_CODE END DO |
---|
| 737 | !OLI_CODE cum_max_vol_tmp(jpl) = cum_max_vol_tmp(jpl-1) ! last category holds no volume |
---|
| 738 | !OLI_CODE cum_max_vol (1:jpl) = cum_max_vol_tmp(1:jpl) |
---|
| 739 | !OLI_CODE |
---|
| 740 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 741 | !OLI_CODE ! is there more meltwater than can be held in the floe? |
---|
| 742 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 743 | !OLI_CODE IF (zvolp >= cum_max_vol(jpl)) THEN |
---|
| 744 | !OLI_CODE drain = zvolp - cum_max_vol(jpl) + zuny |
---|
| 745 | !OLI_CODE zvolp = zvolp - drain |
---|
| 746 | !OLI_CODE dvolp = drain |
---|
| 747 | !OLI_CODE IF (zvolp < zuny) THEN |
---|
| 748 | !OLI_CODE dvolp = dvolp + zvolp |
---|
| 749 | !OLI_CODE zvolp = z0 |
---|
| 750 | !OLI_CODE END IF |
---|
| 751 | !OLI_CODE END IF |
---|
| 752 | !OLI_CODE |
---|
| 753 | !OLI_CODE ! height and area corresponding to the remaining volume |
---|
| 754 | !OLI_CODE |
---|
| 755 | !OLI_CODE call calc_hpond(reduced_aicen, asnon, hsnon, rhos, alfan, & |
---|
| 756 | !OLI_CODE zvolp, cum_max_vol, hpond, m_index) |
---|
| 757 | !OLI_CODE |
---|
| 758 | !OLI_CODE DO n=1, m_index |
---|
| 759 | !OLI_CODE zhpondn(n) = hpond - alfan(n) + alfan(1) |
---|
| 760 | !OLI_CODE zapondn(n) = reduced_aicen(n) |
---|
| 761 | !OLI_CODE END DO |
---|
| 762 | !OLI_CODE apond = sum(zapondn(1:m_index)) |
---|
| 763 | !OLI_CODE |
---|
| 764 | !OLI_CODE !------------------------------------------------------------------------ |
---|
| 765 | !OLI_CODE ! drainage due to ice permeability - Darcy's law |
---|
| 766 | !OLI_CODE !------------------------------------------------------------------------ |
---|
| 767 | !OLI_CODE |
---|
| 768 | !OLI_CODE ! sea water level |
---|
| 769 | !OLI_CODE msno = z0 |
---|
| 770 | !OLI_CODE DO n=1,jpl |
---|
| 771 | !OLI_CODE msno = msno + vsnon(n) * rhos(n) |
---|
| 772 | !OLI_CODE END DO |
---|
| 773 | !OLI_CODE floe_weight = (msno + rhoic*vice + rau0*zvolp) / aice |
---|
| 774 | !OLI_CODE hsl_rel = floe_weight / rau0 & |
---|
| 775 | !OLI_CODE - ((sum(betan(:)*aicen(:))/aice) + alfan(1)) |
---|
| 776 | !OLI_CODE |
---|
| 777 | !OLI_CODE deltah = hpond - hsl_rel |
---|
| 778 | !OLI_CODE pressure_head = grav * rau0 * max(deltah, z0) |
---|
| 779 | !OLI_CODE |
---|
| 780 | !OLI_CODE ! drain IF ice is permeable |
---|
| 781 | !OLI_CODE permflag = 0 |
---|
| 782 | !OLI_CODE IF (pressure_head > z0) THEN |
---|
| 783 | !OLI_CODE DO n = 1, jpl-1 |
---|
| 784 | !OLI_CODE IF (hicen(n) /= z0) THEN |
---|
| 785 | !OLI_CODE CALL permeability_phi(ticen(:,n), salin(:,n), vicen(n), perm) |
---|
| 786 | !OLI_CODE IF (perm > z0) permflag = 1 |
---|
| 787 | !OLI_CODE drain = perm*zapondn(n)*pressure_head*rdt_ice / & |
---|
| 788 | !OLI_CODE (viscosity*hicen(n)) |
---|
| 789 | !OLI_CODE dvolp = dvolp + min(drain, zvolp) |
---|
| 790 | !OLI_CODE zvolp = max(zvolp - drain, z0) |
---|
| 791 | !OLI_CODE IF (zvolp < zuny) THEN |
---|
| 792 | !OLI_CODE dvolp = dvolp + zvolp |
---|
| 793 | !OLI_CODE zvolp = z0 |
---|
| 794 | !OLI_CODE END IF |
---|
| 795 | !OLI_CODE END IF |
---|
| 796 | !OLI_CODE END DO |
---|
| 797 | !OLI_CODE |
---|
| 798 | !OLI_CODE ! adjust melt pond DIMENSIONs |
---|
| 799 | !OLI_CODE IF (permflag > 0) THEN |
---|
| 800 | !OLI_CODE ! recompute pond depth |
---|
| 801 | !OLI_CODE CALL calc_hpond(reduced_aicen, asnon, hsnon, rhos, alfan, & |
---|
| 802 | !OLI_CODE zvolp, cum_max_vol, hpond, m_index) |
---|
| 803 | !OLI_CODE DO n=1, m_index |
---|
| 804 | !OLI_CODE zhpondn(n) = hpond - alfan(n) + alfan(1) |
---|
| 805 | !OLI_CODE zapondn(n) = reduced_aicen(n) |
---|
| 806 | !OLI_CODE END DO |
---|
| 807 | !OLI_CODE apond = sum(zapondn(1:m_index)) |
---|
| 808 | !OLI_CODE END IF |
---|
| 809 | !OLI_CODE END IF ! pressure_head |
---|
| 810 | !OLI_CODE |
---|
| 811 | !OLI_CODE !------------------------------------------------------------------------ |
---|
| 812 | !OLI_CODE ! total melt pond volume in category DOes not include snow volume |
---|
| 813 | !OLI_CODE ! snow in melt ponds is not melted |
---|
| 814 | !OLI_CODE !------------------------------------------------------------------------ |
---|
| 815 | !OLI_CODE |
---|
| 816 | !OLI_CODE ! Calculate pond volume for lower categories |
---|
| 817 | !OLI_CODE DO n=1,m_index-1 |
---|
| 818 | !OLI_CODE zvolpn(n) = zapondn(n) * zhpondn(n) & |
---|
| 819 | !OLI_CODE - (rhos(n)/rauw) * asnon(n) * min(hsnon(n), zhpondn(n))! |
---|
| 820 | !OLI_CODE END DO |
---|
| 821 | !OLI_CODE |
---|
| 822 | !OLI_CODE ! Calculate pond volume for highest category = remaining pond volume |
---|
| 823 | !OLI_CODE IF (m_index == 1) zvolpn(m_index) = zvolp |
---|
| 824 | !OLI_CODE IF (m_index > 1) THEN |
---|
| 825 | !OLI_CODE IF (zvolp > sum(zvolpn(1:m_index-1))) THEN |
---|
| 826 | !OLI_CODE zvolpn(m_index) = zvolp - sum(zvolpn(1:m_index-1)) |
---|
| 827 | !OLI_CODE ELSE |
---|
| 828 | !OLI_CODE zvolpn(m_index) = z0 |
---|
| 829 | !OLI_CODE zhpondn(m_index) = z0 |
---|
| 830 | !OLI_CODE zapondn(m_index) = z0 |
---|
| 831 | !OLI_CODE ! If remaining pond volume is negative reduce pond volume of |
---|
| 832 | !OLI_CODE ! lower category |
---|
| 833 | !OLI_CODE IF (zvolp+zuny < sum(zvolpn(1:m_index-1))) & |
---|
| 834 | !OLI_CODE zvolpn(m_index-1) = zvolpn(m_index-1)-sum(zvolpn(1:m_index-1))& |
---|
| 835 | !OLI_CODE + zvolp |
---|
| 836 | !OLI_CODE END IF |
---|
| 837 | !OLI_CODE END IF |
---|
| 838 | !OLI_CODE |
---|
| 839 | !OLI_CODE DO n=1,m_index |
---|
| 840 | !OLI_CODE IF (zapondn(n) > zuny) THEN |
---|
| 841 | !OLI_CODE zhpondn(n) = zvolpn(n) / zapondn(n) |
---|
| 842 | !OLI_CODE ELSE |
---|
| 843 | !OLI_CODE dvolp = dvolp + zvolpn(n) |
---|
| 844 | !OLI_CODE zhpondn(n) = z0 |
---|
| 845 | !OLI_CODE zvolpn(n) = z0 |
---|
| 846 | !OLI_CODE zapondn(n) = z0 |
---|
| 847 | !OLI_CODE end IF |
---|
| 848 | !OLI_CODE END DO |
---|
| 849 | !OLI_CODE DO n = m_index+1, jpl |
---|
| 850 | !OLI_CODE zhpondn(n) = z0 |
---|
| 851 | !OLI_CODE zapondn(n) = z0 |
---|
| 852 | !OLI_CODE zvolpn (n) = z0 |
---|
| 853 | !OLI_CODE END DO |
---|
| 854 | !OLI_CODE |
---|
| 855 | !OLI_CODE END SUBROUTINE pond_area |
---|
| 856 | !OLI_CODE |
---|
| 857 | !OLI_CODE |
---|
| 858 | !OLI_CODE SUBROUTINE calc_hpond(aicen, asnon, hsnon, rhos, alfan, & |
---|
| 859 | !OLI_CODE zvolp, cum_max_vol, & |
---|
| 860 | !OLI_CODE hpond, m_index) |
---|
| 861 | !OLI_CODE !!------------------------------------------------------------------- |
---|
| 862 | !OLI_CODE !! *** ROUTINE calc_hpond *** |
---|
| 863 | !OLI_CODE !! |
---|
| 864 | !OLI_CODE !! ** Purpose : Compute melt pond depth |
---|
| 865 | !OLI_CODE !!------------------------------------------------------------------- |
---|
| 866 | !OLI_CODE |
---|
| 867 | !OLI_CODE REAL (wp), DIMENSION(jpl), INTENT(IN) :: & |
---|
| 868 | !OLI_CODE aicen, & |
---|
| 869 | !OLI_CODE asnon, & |
---|
| 870 | !OLI_CODE hsnon, & |
---|
| 871 | !OLI_CODE rhos, & |
---|
| 872 | !OLI_CODE alfan, & |
---|
| 873 | !OLI_CODE cum_max_vol |
---|
| 874 | !OLI_CODE |
---|
| 875 | !OLI_CODE REAL (wp), INTENT(IN) :: & |
---|
| 876 | !OLI_CODE zvolp |
---|
| 877 | !OLI_CODE |
---|
| 878 | !OLI_CODE REAL (wp), INTENT(OUT) :: & |
---|
| 879 | !OLI_CODE hpond |
---|
| 880 | !OLI_CODE |
---|
| 881 | !OLI_CODE INTEGER, INTENT(OUT) :: & |
---|
| 882 | !OLI_CODE m_index |
---|
| 883 | !OLI_CODE |
---|
| 884 | !OLI_CODE INTEGER :: n, ns |
---|
| 885 | !OLI_CODE |
---|
| 886 | !OLI_CODE REAL (wp), DIMENSION(0:jpl+1) :: & |
---|
| 887 | !OLI_CODE hitl, & |
---|
| 888 | !OLI_CODE aicetl |
---|
| 889 | !OLI_CODE |
---|
| 890 | !OLI_CODE REAL (wp) :: & |
---|
| 891 | !OLI_CODE rem_vol, & |
---|
| 892 | !OLI_CODE area, & |
---|
| 893 | !OLI_CODE vol, & |
---|
| 894 | !OLI_CODE tmp, & |
---|
| 895 | !OLI_CODE z0 = 0.0_wp, & |
---|
| 896 | !OLI_CODE zuny = 1.0e-11_wp |
---|
| 897 | !OLI_CODE |
---|
| 898 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 899 | !OLI_CODE ! hpond is zero if zvolp is zero - have we fully drained? |
---|
| 900 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 901 | !OLI_CODE |
---|
| 902 | !OLI_CODE IF (zvolp < zuny) THEN |
---|
| 903 | !OLI_CODE hpond = z0 |
---|
| 904 | !OLI_CODE m_index = 0 |
---|
| 905 | !OLI_CODE ELSE |
---|
| 906 | !OLI_CODE |
---|
| 907 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 908 | !OLI_CODE ! Calculate the category where water fills up to |
---|
| 909 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 910 | !OLI_CODE |
---|
| 911 | !OLI_CODE !----------| |
---|
| 912 | !OLI_CODE ! | |
---|
| 913 | !OLI_CODE ! | |
---|
| 914 | !OLI_CODE ! |----------| -- -- |
---|
| 915 | !OLI_CODE !__________|__________|_________________________________________ ^ |
---|
| 916 | !OLI_CODE ! | | rem_vol ^ | Semi-filled |
---|
| 917 | !OLI_CODE ! | |----------|-- -- -- - ---|-- ---- -- -- --v layer |
---|
| 918 | !OLI_CODE ! | | | | |
---|
| 919 | !OLI_CODE ! | | | |hpond |
---|
| 920 | !OLI_CODE ! | | |----------| | |------- |
---|
| 921 | !OLI_CODE ! | | | | | | |
---|
| 922 | !OLI_CODE ! | | | |---v-----| |
---|
| 923 | !OLI_CODE ! | | m_index | | | |
---|
| 924 | !OLI_CODE !------------------------------------------------------------- |
---|
| 925 | !OLI_CODE |
---|
| 926 | !OLI_CODE m_index = 0 ! 1:m_index categories have water in them |
---|
| 927 | !OLI_CODE DO n = 1, jpl |
---|
| 928 | !OLI_CODE IF (zvolp <= cum_max_vol(n)) THEN |
---|
| 929 | !OLI_CODE m_index = n |
---|
| 930 | !OLI_CODE IF (n == 1) THEN |
---|
| 931 | !OLI_CODE rem_vol = zvolp |
---|
| 932 | !OLI_CODE ELSE |
---|
| 933 | !OLI_CODE rem_vol = zvolp - cum_max_vol(n-1) |
---|
| 934 | !OLI_CODE END IF |
---|
| 935 | !OLI_CODE exit ! to break out of the loop |
---|
| 936 | !OLI_CODE END IF |
---|
| 937 | !OLI_CODE END DO |
---|
| 938 | !OLI_CODE m_index = min(jpl-1, m_index) |
---|
| 939 | !OLI_CODE |
---|
| 940 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 941 | !OLI_CODE ! semi-filled layer may have m_index different snow in it |
---|
| 942 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 943 | !OLI_CODE |
---|
| 944 | !OLI_CODE !----------------------------------------------------------- ^ |
---|
| 945 | !OLI_CODE ! | alfan(m_index+1) |
---|
| 946 | !OLI_CODE ! | |
---|
| 947 | !OLI_CODE !hitl(3)--> |----------| | |
---|
| 948 | !OLI_CODE !hitl(2)--> |------------| * * * * *| | |
---|
| 949 | !OLI_CODE !hitl(1)--> |----------|* * * * * * |* * * * * | | |
---|
| 950 | !OLI_CODE !hitl(0)-->------------------------------------------------- | ^ |
---|
| 951 | !OLI_CODE ! various snow from lower categories | |alfa(m_index) |
---|
| 952 | !OLI_CODE |
---|
| 953 | !OLI_CODE ! hitl - heights of the snow layers from thinner and current categories |
---|
| 954 | !OLI_CODE ! aicetl - area of each snow depth in this layer |
---|
| 955 | !OLI_CODE |
---|
| 956 | !OLI_CODE hitl(:) = z0 |
---|
| 957 | !OLI_CODE aicetl(:) = z0 |
---|
| 958 | !OLI_CODE DO n = 1, m_index |
---|
| 959 | !OLI_CODE hitl(n) = max(min(hsnon(n) + alfan(n) - alfan(m_index), & |
---|
| 960 | !OLI_CODE alfan(m_index+1) - alfan(m_index)), z0) |
---|
| 961 | !OLI_CODE aicetl(n) = asnon(n) |
---|
| 962 | !OLI_CODE |
---|
| 963 | !OLI_CODE aicetl(0) = aicetl(0) + (aicen(n) - asnon(n)) |
---|
| 964 | !OLI_CODE END DO |
---|
| 965 | !OLI_CODE hitl(m_index+1) = alfan(m_index+1) - alfan(m_index) |
---|
| 966 | !OLI_CODE aicetl(m_index+1) = z0 |
---|
| 967 | !OLI_CODE |
---|
| 968 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 969 | !OLI_CODE ! reorder array according to hitl |
---|
| 970 | !OLI_CODE ! snow heights not necessarily in height order |
---|
| 971 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 972 | !OLI_CODE |
---|
| 973 | !OLI_CODE DO ns = 1, m_index+1 |
---|
| 974 | !OLI_CODE DO n = 0, m_index - ns + 1 |
---|
| 975 | !OLI_CODE IF (hitl(n) > hitl(n+1)) THEN ! swap order |
---|
| 976 | !OLI_CODE tmp = hitl(n) |
---|
| 977 | !OLI_CODE hitl(n) = hitl(n+1) |
---|
| 978 | !OLI_CODE hitl(n+1) = tmp |
---|
| 979 | !OLI_CODE tmp = aicetl(n) |
---|
| 980 | !OLI_CODE aicetl(n) = aicetl(n+1) |
---|
| 981 | !OLI_CODE aicetl(n+1) = tmp |
---|
| 982 | !OLI_CODE END IF |
---|
| 983 | !OLI_CODE END DO |
---|
| 984 | !OLI_CODE END DO |
---|
| 985 | !OLI_CODE |
---|
| 986 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 987 | !OLI_CODE ! divide semi-filled layer into set of sublayers each vertically homogenous |
---|
| 988 | !OLI_CODE !---------------------------------------------------------------- |
---|
| 989 | !OLI_CODE |
---|
| 990 | !OLI_CODE !hitl(3)---------------------------------------------------------------- |
---|
| 991 | !OLI_CODE ! | * * * * * * * * |
---|
| 992 | !OLI_CODE ! |* * * * * * * * * |
---|
| 993 | !OLI_CODE !hitl(2)---------------------------------------------------------------- |
---|
| 994 | !OLI_CODE ! | * * * * * * * * | * * * * * * * * |
---|
| 995 | !OLI_CODE ! |* * * * * * * * * |* * * * * * * * * |
---|
| 996 | !OLI_CODE !hitl(1)---------------------------------------------------------------- |
---|
| 997 | !OLI_CODE ! | * * * * * * * * | * * * * * * * * | * * * * * * * * |
---|
| 998 | !OLI_CODE ! |* * * * * * * * * |* * * * * * * * * |* * * * * * * * * |
---|
| 999 | !OLI_CODE !hitl(0)---------------------------------------------------------------- |
---|
| 1000 | !OLI_CODE ! aicetl(0) aicetl(1) aicetl(2) aicetl(3) |
---|
| 1001 | !OLI_CODE |
---|
| 1002 | !OLI_CODE ! move up over layers incrementing volume |
---|
| 1003 | !OLI_CODE DO n = 1, m_index+1 |
---|
| 1004 | !OLI_CODE |
---|
| 1005 | !OLI_CODE area = sum(aicetl(:)) - & ! total area of sub-layer |
---|
| 1006 | !OLI_CODE (rhos(n)/rau0) * sum(aicetl(n:jpl+1)) ! area of sub-layer occupied by snow |
---|
| 1007 | !OLI_CODE |
---|
| 1008 | !OLI_CODE vol = (hitl(n) - hitl(n-1)) * area ! thickness of sub-layer times area |
---|
| 1009 | !OLI_CODE |
---|
| 1010 | !OLI_CODE IF (vol >= rem_vol) THEN ! have reached the sub-layer with the depth within |
---|
| 1011 | !OLI_CODE hpond = rem_vol / area + hitl(n-1) + alfan(m_index) - & |
---|
| 1012 | !OLI_CODE alfan(1) |
---|
| 1013 | !OLI_CODE exit |
---|
| 1014 | !OLI_CODE ELSE ! still in sub-layer below the sub-layer with the depth |
---|
| 1015 | !OLI_CODE rem_vol = rem_vol - vol |
---|
| 1016 | !OLI_CODE END IF |
---|
| 1017 | !OLI_CODE |
---|
| 1018 | !OLI_CODE END DO |
---|
| 1019 | !OLI_CODE |
---|
| 1020 | !OLI_CODE END IF |
---|
| 1021 | !OLI_CODE |
---|
| 1022 | !OLI_CODE END SUBROUTINE calc_hpond |
---|
| 1023 | !OLI_CODE |
---|
| 1024 | !OLI_CODE |
---|
| 1025 | !OLI_CODE SUBROUTINE permeability_phi(ticen, salin, vicen, perm) |
---|
| 1026 | !OLI_CODE !!------------------------------------------------------------------- |
---|
| 1027 | !OLI_CODE !! *** ROUTINE permeability_phi *** |
---|
| 1028 | !OLI_CODE !! |
---|
| 1029 | !OLI_CODE !! ** Purpose : Determine the liquid fraction of brine in the ice |
---|
| 1030 | !OLI_CODE !! and its permeability |
---|
| 1031 | !OLI_CODE !!------------------------------------------------------------------- |
---|
| 1032 | !OLI_CODE REAL (wp), DIMENSION(nlay_i), INTENT(IN) :: & |
---|
| 1033 | !OLI_CODE ticen, & ! energy of melting for each ice layer (J/m2) |
---|
| 1034 | !OLI_CODE salin |
---|
| 1035 | !OLI_CODE |
---|
| 1036 | !OLI_CODE REAL (wp), INTENT(IN) :: & |
---|
| 1037 | !OLI_CODE vicen ! ice volume |
---|
| 1038 | !OLI_CODE |
---|
| 1039 | !OLI_CODE REAL (wp), INTENT(OUT) :: & |
---|
| 1040 | !OLI_CODE perm ! permeability |
---|
| 1041 | !OLI_CODE |
---|
| 1042 | !OLI_CODE REAL (wp) :: & |
---|
| 1043 | !OLI_CODE Sbr ! brine salinity |
---|
| 1044 | !OLI_CODE |
---|
| 1045 | !OLI_CODE REAL (wp), DIMENSION(nlay_i) :: & |
---|
| 1046 | !OLI_CODE Tin, & ! ice temperature |
---|
| 1047 | !OLI_CODE phi ! liquid fraction |
---|
| 1048 | !OLI_CODE |
---|
| 1049 | !OLI_CODE INTEGER :: k |
---|
| 1050 | !OLI_CODE |
---|
| 1051 | !OLI_CODE REAL (wp) :: & |
---|
| 1052 | !OLI_CODE c2 = 2.0_wp |
---|
| 1053 | !OLI_CODE |
---|
| 1054 | !OLI_CODE !----------------------------------------------------------------- |
---|
| 1055 | !OLI_CODE ! Compute ice temperatures from enthalpies using quadratic formula |
---|
| 1056 | !OLI_CODE !----------------------------------------------------------------- |
---|
| 1057 | !OLI_CODE |
---|
| 1058 | !OLI_CODE DO k = 1,nlay_i |
---|
| 1059 | !OLI_CODE Tin(k) = ticen(k) |
---|
| 1060 | !OLI_CODE END DO |
---|
| 1061 | !OLI_CODE |
---|
| 1062 | !OLI_CODE !----------------------------------------------------------------- |
---|
| 1063 | !OLI_CODE ! brine salinity and liquid fraction |
---|
| 1064 | !OLI_CODE !----------------------------------------------------------------- |
---|
| 1065 | !OLI_CODE |
---|
| 1066 | !OLI_CODE IF (maxval(Tin-rtt) <= -c2) THEN |
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| 1067 | !OLI_CODE |
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| 1068 | !OLI_CODE DO k = 1,nlay_i |
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| 1069 | !OLI_CODE Sbr = - 1.2_wp & |
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| 1070 | !OLI_CODE -21.8_wp * (Tin(k)-rtt) & |
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| 1071 | !OLI_CODE - 0.919_wp * (Tin(k)-rtt)**2 & |
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| 1072 | !OLI_CODE - 0.01878_wp * (Tin(k)-rtt)**3 |
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| 1073 | !OLI_CODE phi(k) = salin(k)/Sbr ! liquid fraction |
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| 1074 | !OLI_CODE END DO ! k |
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| 1075 | !OLI_CODE |
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| 1076 | !OLI_CODE ELSE |
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| 1077 | !OLI_CODE |
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| 1078 | !OLI_CODE DO k = 1,nlay_i |
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| 1079 | !OLI_CODE Sbr = -17.6_wp * (Tin(k)-rtt) & |
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| 1080 | !OLI_CODE - 0.389_wp * (Tin(k)-rtt)**2 & |
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| 1081 | !OLI_CODE - 0.00362_wp* (Tin(k)-rtt)**3 |
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| 1082 | !OLI_CODE phi(k) = salin(k)/Sbr ! liquid fraction |
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| 1083 | !OLI_CODE END DO |
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| 1084 | !OLI_CODE |
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| 1085 | !OLI_CODE END IF |
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| 1086 | !OLI_CODE |
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| 1087 | !OLI_CODE !----------------------------------------------------------------- |
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| 1088 | !OLI_CODE ! permeability |
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| 1089 | !OLI_CODE !----------------------------------------------------------------- |
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| 1090 | !OLI_CODE |
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| 1091 | !OLI_CODE perm = 3.0e-08_wp * (minval(phi))**3 |
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| 1092 | !OLI_CODE |
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| 1093 | !OLI_CODE END SUBROUTINE permeability_phi |
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| 1094 | !OLI_CODE |
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| 1095 | !OLI_CODE #else |
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| 1096 | !OLI_CODE !!---------------------------------------------------------------------- |
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| 1097 | !OLI_CODE !! Default option Dummy Module No LIM-3 sea-ice model |
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| 1098 | !OLI_CODE !!---------------------------------------------------------------------- |
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| 1099 | !OLI_CODE CONTAINS |
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| 1100 | !OLI_CODE SUBROUTINE lim_mp_init ! Empty routine |
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| 1101 | !OLI_CODE END SUBROUTINE lim_mp_init |
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| 1102 | !OLI_CODE SUBROUTINE lim_mp ! Empty routine |
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| 1103 | !OLI_CODE END SUBROUTINE lim_mp |
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| 1104 | !OLI_CODE SUBROUTINE compute_mp_topo ! Empty routine |
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| 1105 | !OLI_CODE END SUBROUTINE compute_mp_topo |
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| 1106 | !OLI_CODE SUBROUTINE pond_area ! Empty routine |
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| 1107 | !OLI_CODE END SUBROUTINE pond_area |
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| 1108 | !OLI_CODE SUBROUTINE calc_hpond ! Empty routine |
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| 1109 | !OLI_CODE END SUBROUTINE calc_hpond |
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| 1110 | !OLI_CODE SUBROUTINE permeability_phy ! Empty routine |
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| 1111 | !OLI_CODE END SUBROUTINE permeability_phy |
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| 1112 | !OLI_CODE #endif |
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| 1113 | !OLI_CODE !!====================================================================== |
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| 1114 | !OLI_CODE END MODULE limmp_topo |
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| 1115 | !OLI_CODE |
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