1 | MODULE isfmlt |
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2 | !!====================================================================== |
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3 | !! *** MODULE sbcisf *** |
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4 | !! Surface module : compute iceshelf melt and heat flux |
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5 | !!====================================================================== |
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6 | !! History : 3.2 ! 2011-02 (C.Harris ) Original code isf cav |
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7 | !! X.X ! 2006-02 (C. Wang ) Original code bg03 |
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8 | !! 3.4 ! 2013-03 (P. Mathiot) Merging + parametrization |
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9 | !! 4.1 ! 2019-09 (P. Mathiot) Split param/explicit ice shelf and re-organisation |
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10 | !!---------------------------------------------------------------------- |
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11 | |
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12 | !!---------------------------------------------------------------------- |
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13 | !! isfmlt : compute iceshelf melt and heat flux |
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14 | !!---------------------------------------------------------------------- |
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15 | USE oce ! ocean dynamics and tracers |
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16 | USE dom_oce ! ocean space and time domain |
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17 | USE phycst ! physical constants |
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18 | USE eosbn2 ! equation of state |
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19 | USE sbc_oce ! surface boundary condition: ocean fields |
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20 | USE zdfdrg ! vertical physics: top/bottom drag coef. |
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21 | ! |
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22 | USE in_out_manager ! I/O manager |
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23 | USE iom ! I/O library |
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24 | USE fldread ! read input field at current time step |
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25 | USE lbclnk ! |
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26 | USE lib_fortran ! glob_sum |
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27 | ! |
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28 | USE isfrst ! iceshelf restart |
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29 | USE isftbl ! ice shelf boundary layer |
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30 | USE isfpar ! ice shelf parametrisation |
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31 | USE isfcav ! ice shelf cavity |
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32 | USE isf ! isf variables |
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33 | |
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34 | IMPLICIT NONE |
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35 | |
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36 | PRIVATE |
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37 | |
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38 | PUBLIC isf_mlt, isf_mlt_init ! routine called in sbcmod and divhor |
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39 | |
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40 | !!---------------------------------------------------------------------- |
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41 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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42 | !! $Id$ |
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43 | !! Software governed by the CeCILL license (see ./LICENSE) |
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44 | !!---------------------------------------------------------------------- |
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45 | CONTAINS |
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46 | |
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47 | SUBROUTINE isf_mlt( kt ) |
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48 | !!--------------------------------------------------------------------- |
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49 | !! *** ROUTINE isf_mlt *** |
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50 | !! |
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51 | !! ** Purpose : |
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52 | !! |
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53 | !! ** Method : |
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54 | !! |
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55 | !!---------------------------------------------------------------------- |
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56 | INTEGER, INTENT(in) :: kt ! ocean time step |
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57 | !!--------------------------------------------------------------------- |
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58 | ! |
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59 | IF ( ln_isfcav_mlt ) THEN |
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60 | ! |
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61 | ! before time step |
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62 | IF ( kt /= nit000 ) THEN |
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63 | risf_cav_tsc_b (:,:,:) = risf_cav_tsc (:,:,:) |
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64 | fwfisf_cav_b(:,:) = fwfisf_cav(:,:) |
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65 | END IF |
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66 | ! |
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67 | ! compute tbl lvl/h |
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68 | CALL isf_tbl_lvl(ht_n, e3t_n, misfkt_cav, misfkb_cav, rhisf_tbl_cav, rfrac_tbl_cav) |
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69 | ! |
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70 | ! compute ice shelf melt |
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71 | CALL isf_cav( kt, risf_cav_tsc, fwfisf_cav) |
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72 | ! |
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73 | ! write restart variables (qoceisf, qhcisf, fwfisf for now and before) |
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74 | IF (lrst_oce) CALL isfrst_write(kt, 'cav', risf_cav_tsc, fwfisf_cav) |
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75 | ! |
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76 | END IF |
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77 | ! |
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78 | IF ( ln_isfpar_mlt ) THEN |
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79 | ! |
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80 | ! before time step |
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81 | IF ( kt /= nit000 ) THEN |
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82 | risf_par_tsc_b (:,:) = risf_par_tsc (:,:) |
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83 | fwfisf_par_b(:,:) = fwfisf_par(:,:) |
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84 | END IF |
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85 | ! |
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86 | ! compute misfkb, rhisf_tbl, rfrac (deepest level, thickness, fraction of deepest cell affected by tbl) |
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87 | CALL isf_tbl_lvl(ht_n, e3t_n, misfkt_par, misfkb_par, rhisf_tbl_par, rfrac_tbl_par) |
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88 | ! |
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89 | ! compute ice shelf melt |
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90 | CALL isf_par( kt, risf_par_tsc, fwfisf_par) |
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91 | ! |
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92 | ! write restart variables (qoceisf, qhcisf, fwfisf for now and before) |
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93 | IF (lrst_oce) CALL isfrst_write(kt, 'par', risf_par_tsc, fwfisf_par) |
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94 | ! |
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95 | END IF |
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96 | ! |
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97 | END SUBROUTINE isf_mlt |
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98 | |
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99 | SUBROUTINE isf_mlt_init |
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100 | !!--------------------------------------------------------------------- |
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101 | !! *** ROUTINE isfmlt_init *** |
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102 | !! |
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103 | !! ** Purpose : |
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104 | !! |
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105 | !! ** Method : |
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106 | !! |
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107 | !!---------------------------------------------------------------------- |
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108 | INTEGER :: inum, ierror |
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109 | INTEGER :: ios ! Local integer output status for namelist read |
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110 | INTEGER :: ikt, ikb |
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111 | INTEGER :: ji, jj |
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112 | !!---------------------------------------------------------------------- |
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113 | NAMELIST/namisf/ ln_isfcav_mlt, cn_isfcav_mlt, cn_gammablk, rn_gammat0, rn_gammas0, rn_htbl, sn_isfcav_fwf, & |
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114 | & ln_isfpar_mlt, cn_isfpar_mlt, sn_isfpar_fwf, sn_isfpar_zmin, sn_isfpar_zmax, sn_isfpar_Leff |
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115 | !!---------------------------------------------------------------------- |
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116 | |
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117 | REWIND( numnam_ref ) ! Namelist namsbc_rnf in reference namelist : Runoffs |
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118 | READ ( numnam_ref, namisf, IOSTAT = ios, ERR = 901) |
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119 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namisf in reference namelist', lwp ) |
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120 | |
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121 | REWIND( numnam_cfg ) ! Namelist namsbc_rnf in configuration namelist : Runoffs |
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122 | READ ( numnam_cfg, namisf, IOSTAT = ios, ERR = 902 ) |
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123 | 902 IF( ios > 0 ) CALL ctl_nam ( ios , 'namisf in configuration namelist', lwp ) |
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124 | IF(lwm) WRITE ( numond, namisf ) |
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125 | ! |
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126 | IF(lwp) WRITE(numout,*) |
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127 | IF(lwp) WRITE(numout,*) 'isf_init : ice shelf initialisation' |
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128 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~' |
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129 | IF(lwp) WRITE(numout,*) ' Namelist namisf :' |
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130 | IF(lwp) WRITE(numout,*) ' melt inside the cavity ln_isfcav_mlt = ', ln_isfcav_mlt |
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131 | IF ( ln_isfcav ) THEN |
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132 | IF(lwp) WRITE(numout,*) ' melt formulation cn_isfcav_mlt = ', cn_isfcav_mlt |
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133 | IF(lwp) WRITE(numout,*) ' thickness of the top boundary layer rn_htbl = ', rn_htbl |
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134 | IF(lwp) WRITE(numout,*) ' gamma formulation cn_gammablk = ', cn_gammablk |
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135 | IF ( TRIM(cn_gammablk) .NE. 'spe' ) THEN |
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136 | IF(lwp) WRITE(numout,*) ' gammat coefficient rn_gammat0 = ', rn_gammat0 |
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137 | IF(lwp) WRITE(numout,*) ' gammas coefficient rn_gammas0 = ', rn_gammas0 |
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138 | IF(lwp) WRITE(numout,*) ' top drag coef. used (from namdrg_top) rn_Cd0 = ', r_Cdmin_top |
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139 | END IF |
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140 | END IF |
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141 | IF(lwp) WRITE(numout,*) '' |
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142 | IF(lwp) WRITE(numout,*) ' ice shelf melt parametrisation ln_isfpar_mlt = ', ln_isfpar_mlt |
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143 | IF ( ln_isfpar_mlt ) THEN |
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144 | IF(lwp) WRITE(numout,*) ' isf parametrisation formulation cn_isfpar_mlt = ', cn_isfpar_mlt |
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145 | END IF |
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146 | IF(lwp) WRITE(numout,*) '' |
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147 | ! |
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148 | ! Allocate public array |
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149 | CALL isf_alloc() |
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150 | ! |
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151 | ! initialisation |
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152 | ! cav |
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153 | misfkt_cav(:,:) = mikt(:,:) ; misfkb_cav(:,:) = mikt(:,:) |
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154 | fwfisf_cav(:,:) = 0.0_wp ; fwfisf_cav_b(:,:) = 0.0_wp |
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155 | rhisf_tbl_cav(:,:) = 1e-20 ; rfrac_tbl_cav(:,:) = 0.0_wp |
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156 | risf_cav_tsc(:,:,:) = 0.0_wp ; risf_cav_tsc_b(:,:,:) = 0.0_wp |
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157 | ! |
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158 | mskisf_cav(:,:) = (1._wp - tmask(:,:,1)) * ssmask(:,:) |
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159 | ! |
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160 | ! par |
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161 | misfkt_par(:,:) = 1 ; misfkb_par(:,:) = 1 |
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162 | fwfisf_par(:,:) = 0.0_wp ; fwfisf_par_b(:,:) = 0.0_wp |
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163 | rhisf_tbl_par(:,:) = 1e-20 ; rfrac_tbl_par(:,:) = 0.0_wp |
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164 | risf_par_tsc(:,:,:) = 0.0_wp ; risf_par_tsc_b(:,:,:) = 0.0_wp |
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165 | ! |
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166 | mskisf_par(:,:) = 0 |
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167 | ! |
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168 | ! initialisation useful variable |
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169 | r1_Lfusisf = 1._wp / rLfusisf |
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170 | ! |
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171 | DO jj = 1,jpj |
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172 | DO ji = 1,jpi |
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173 | ikt = mikt(ji,jj) |
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174 | ikb = mbkt(ji,jj) |
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175 | bathy (ji,jj) = gdepw_0(ji,jj,ikb+1) |
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176 | risfdep(ji,jj) = gdepw_0(ji,jj,ikt ) |
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177 | END DO |
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178 | END DO |
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179 | ! |
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180 | IF ( ln_isfcav_mlt ) THEN |
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181 | ! |
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182 | ! initialisation of cav variable |
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183 | CALL isf_cav_init() |
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184 | ! |
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185 | ! read cav variable from restart |
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186 | IF ( ln_rstart ) CALL isfrst_read('cav', risf_cav_tsc, fwfisf_cav, risf_cav_tsc_b, fwfisf_cav_b) |
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187 | ! |
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188 | END IF |
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189 | ! |
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190 | IF ( ln_isfpar_mlt ) THEN |
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191 | ! |
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192 | ! initialisation of par variable |
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193 | CALL isf_par_init() |
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194 | ! |
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195 | ! read par variable from restart |
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196 | IF ( ln_rstart ) CALL isfrst_read('par', risf_par_tsc, fwfisf_par, risf_par_tsc_b, fwfisf_par_b) |
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197 | ! |
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198 | END IF |
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199 | ! |
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200 | END SUBROUTINE isf_mlt_init |
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201 | !!====================================================================== |
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202 | END MODULE isfmlt |
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