1 | MODULE icecor |
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2 | !!====================================================================== |
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3 | !! *** MODULE icecor *** |
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4 | !! LIM-3 : Update of sea-ice global variables at the end of the time step |
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5 | !!====================================================================== |
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6 | !! History : 3.0 ! 2006-04 (M. Vancoppenolle) Original code |
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7 | !! 3.5 ! 2014-06 (C. Rousset) Complete rewriting/cleaning |
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8 | !!---------------------------------------------------------------------- |
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9 | #if defined key_lim3 |
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10 | !!---------------------------------------------------------------------- |
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11 | !! 'key_lim3' LIM3 sea-ice model |
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12 | !!---------------------------------------------------------------------- |
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13 | !! ice_cor : computes update of sea-ice global variables from trend terms |
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14 | !!---------------------------------------------------------------------- |
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15 | USE dom_oce |
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16 | USE phycst ! physical constants |
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17 | USE ice |
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18 | USE ice1D ! LIM thermodynamic sea-ice variables |
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19 | USE iceitd |
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20 | USE icevar |
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21 | USE icectl ! control prints |
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22 | ! |
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23 | USE in_out_manager ! I/O manager |
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24 | USE lib_fortran ! Fortran utilities (allows no signed zero when 'key_nosignedzero' defined) |
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25 | USE lbclnk ! lateral boundary condition - MPP link |
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26 | USE lib_mpp ! MPP library |
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27 | USE timing ! Timing |
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28 | |
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29 | IMPLICIT NONE |
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30 | PRIVATE |
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31 | |
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32 | PUBLIC ice_cor |
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33 | |
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34 | !! * Substitutions |
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35 | # include "vectopt_loop_substitute.h90" |
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36 | !!---------------------------------------------------------------------- |
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37 | !! NEMO/LIM3 4.0 , UCL - NEMO Consortium (2011) |
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38 | !! $Id: icecor.F90 8378 2017-07-26 13:55:59Z clem $ |
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39 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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40 | !!---------------------------------------------------------------------- |
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41 | CONTAINS |
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42 | |
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43 | SUBROUTINE ice_cor( kt , kn ) |
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44 | !!------------------------------------------------------------------- |
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45 | !! *** ROUTINE ice_cor *** |
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46 | !! |
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47 | !! ** Purpose : Computes update of sea-ice global variables at |
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48 | !! the end of the dynamics. |
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49 | !! |
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50 | !!--------------------------------------------------------------------- |
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51 | INTEGER, INTENT(in) :: kt ! number of iteration |
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52 | INTEGER, INTENT(in) :: kn ! 1 = after dyn ; 2 = after thermo |
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53 | INTEGER :: ji, jj, jk, jl ! dummy loop indices |
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54 | REAL(wp) :: zsal |
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55 | REAL(wp) :: zvi_b, zsmv_b, zei_b, zfs_b, zfw_b, zft_b |
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56 | !!------------------------------------------------------------------- |
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57 | IF( nn_timing == 1 ) CALL timing_start('icecor') |
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58 | |
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59 | IF( kt == nit000 .AND. lwp .AND. kn == 2 ) THEN |
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60 | WRITE(numout,*) |
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61 | WRITE(numout,*)' icecor ' |
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62 | WRITE(numout,*)' ~~~~~~ ' |
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63 | ENDIF |
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64 | |
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65 | ! conservation test |
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66 | IF( ln_limdiachk ) CALL ice_cons_hsm(0, 'icecor', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) |
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67 | |
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68 | !---------------------------------------------------------------------- |
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69 | ! Constrain the thickness of the smallest category above himin |
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70 | !---------------------------------------------------------------------- |
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71 | IF( kn == 2 ) THEN |
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72 | |
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73 | DO jj = 1, jpj |
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74 | DO ji = 1, jpi |
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75 | rswitch = MAX( 0._wp , SIGN( 1._wp, a_i(ji,jj,1) - epsi20 ) ) !0 if no ice and 1 if yes |
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76 | ht_i(ji,jj,1) = v_i (ji,jj,1) / MAX( a_i(ji,jj,1) , epsi20 ) * rswitch |
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77 | IF( v_i(ji,jj,1) > 0._wp .AND. ht_i(ji,jj,1) < rn_himin ) THEN |
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78 | a_i (ji,jj,1) = a_i (ji,jj,1) * ht_i(ji,jj,1) / rn_himin |
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79 | ENDIF |
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80 | END DO |
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81 | END DO |
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82 | |
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83 | ENDIF |
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84 | |
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85 | !---------------------------------------------------- |
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86 | ! ice concentration should not exceed amax |
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87 | !----------------------------------------------------- |
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88 | at_i(:,:) = 0._wp |
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89 | DO jl = 1, jpl |
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90 | at_i(:,:) = a_i(:,:,jl) + at_i(:,:) |
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91 | END DO |
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92 | |
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93 | DO jl = 1, jpl |
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94 | DO jj = 1, jpj |
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95 | DO ji = 1, jpi |
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96 | IF( at_i(ji,jj) > rn_amax_2d(ji,jj) .AND. a_i(ji,jj,jl) > 0._wp ) THEN |
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97 | a_i (ji,jj,jl) = a_i (ji,jj,jl) * ( 1._wp - ( 1._wp - rn_amax_2d(ji,jj) / at_i(ji,jj) ) ) |
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98 | ENDIF |
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99 | END DO |
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100 | END DO |
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101 | END DO |
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102 | |
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103 | !--------------------- |
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104 | ! Ice salinity bounds |
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105 | !--------------------- |
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106 | IF ( nn_icesal == 2 ) THEN |
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107 | DO jl = 1, jpl |
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108 | DO jj = 1, jpj |
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109 | DO ji = 1, jpi |
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110 | zsal = smv_i(ji,jj,jl) |
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111 | ! salinity stays in bounds |
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112 | rswitch = 1._wp - MAX( 0._wp, SIGN( 1._wp, - v_i(ji,jj,jl) ) ) |
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113 | smv_i(ji,jj,jl) = rswitch * MAX( MIN( rn_simax * v_i(ji,jj,jl), smv_i(ji,jj,jl) ), rn_simin * v_i(ji,jj,jl) ) |
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114 | ! associated salt flux |
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115 | sfx_res(ji,jj) = sfx_res(ji,jj) - ( smv_i(ji,jj,jl) - zsal ) * rhoic * r1_rdtice |
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116 | END DO |
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117 | END DO |
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118 | END DO |
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119 | ENDIF |
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120 | |
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121 | !---------------------------------------------------- |
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122 | ! Rebin categories with thickness out of bounds |
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123 | !---------------------------------------------------- |
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124 | IF ( jpl > 1 ) CALL ice_itd_reb |
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125 | |
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126 | !----------------- |
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127 | ! zap small values |
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128 | !----------------- |
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129 | CALL ice_var_zapsmall |
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130 | |
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131 | !---------------------------------------------- |
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132 | ! Ice drift. Corrections to avoid wrong values |
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133 | !---------------------------------------------- |
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134 | IF( kn == 2 ) THEN |
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135 | DO jj = 2, jpjm1 |
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136 | DO ji = 2, jpim1 |
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137 | IF ( at_i(ji,jj) == 0._wp ) THEN ! what to do if there is no ice |
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138 | IF ( at_i(ji+1,jj) == 0._wp ) u_ice(ji,jj) = 0._wp ! right side |
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139 | IF ( at_i(ji-1,jj) == 0._wp ) u_ice(ji-1,jj) = 0._wp ! left side |
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140 | IF ( at_i(ji,jj+1) == 0._wp ) v_ice(ji,jj) = 0._wp ! upper side |
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141 | IF ( at_i(ji,jj-1) == 0._wp ) v_ice(ji,jj-1) = 0._wp ! bottom side |
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142 | ENDIF |
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143 | END DO |
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144 | END DO |
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145 | !lateral boundary conditions |
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146 | CALL lbc_lnk_multi( u_ice, 'U', -1., v_ice, 'V', -1. ) |
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147 | !mask velocities |
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148 | u_ice(:,:) = u_ice(:,:) * umask(:,:,1) |
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149 | v_ice(:,:) = v_ice(:,:) * vmask(:,:,1) |
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150 | ENDIF |
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151 | |
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152 | ! ------------------------------------------------- |
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153 | ! Diagnostics |
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154 | ! ------------------------------------------------- |
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155 | IF( kn == 1 ) THEN |
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156 | DO jl = 1, jpl |
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157 | afx_dyn(:,:) = afx_dyn(:,:) + ( a_i(:,:,jl) - a_i_b(:,:,jl) ) * r1_rdtice |
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158 | END DO |
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159 | |
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160 | DO jj = 1, jpj |
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161 | DO ji = 1, jpi |
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162 | ! heat content variation (W.m-2) |
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163 | diag_heat(ji,jj) = - ( SUM( e_i(ji,jj,1:nlay_i,:) - e_i_b(ji,jj,1:nlay_i,:) ) + & |
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164 | & SUM( e_s(ji,jj,1:nlay_s,:) - e_s_b(ji,jj,1:nlay_s,:) ) & |
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165 | & ) * r1_rdtice |
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166 | ! salt, volume |
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167 | diag_smvi(ji,jj) = SUM( smv_i(ji,jj,:) - smv_i_b(ji,jj,:) ) * rhoic * r1_rdtice |
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168 | diag_vice(ji,jj) = SUM( v_i (ji,jj,:) - v_i_b (ji,jj,:) ) * rhoic * r1_rdtice |
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169 | diag_vsnw(ji,jj) = SUM( v_s (ji,jj,:) - v_s_b (ji,jj,:) ) * rhosn * r1_rdtice |
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170 | END DO |
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171 | END DO |
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172 | |
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173 | ELSEIF( kn == 2 ) THEN |
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174 | |
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175 | DO jl = 1, jpl |
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176 | oa_i(:,:,jl) = oa_i(:,:,jl) + a_i(:,:,jl) * rdt_ice ! ice natural aging |
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177 | afx_thd(:,:) = afx_thd(:,:) + ( a_i(:,:,jl) - a_i_b(:,:,jl) ) * r1_rdtice |
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178 | END DO |
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179 | afx_tot = afx_thd + afx_dyn |
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180 | |
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181 | DO jj = 1, jpj |
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182 | DO ji = 1, jpi |
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183 | ! heat content variation (W.m-2) |
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184 | diag_heat(ji,jj) = diag_heat(ji,jj) - & |
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185 | & ( SUM( e_i(ji,jj,1:nlay_i,:) - e_i_b(ji,jj,1:nlay_i,:) ) + & |
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186 | & SUM( e_s(ji,jj,1:nlay_s,:) - e_s_b(ji,jj,1:nlay_s,:) ) & |
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187 | & ) * r1_rdtice |
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188 | ! salt, volume |
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189 | diag_smvi(ji,jj) = diag_smvi(ji,jj) + SUM( smv_i(ji,jj,:) - smv_i_b(ji,jj,:) ) * rhoic * r1_rdtice |
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190 | diag_vice(ji,jj) = diag_vice(ji,jj) + SUM( v_i (ji,jj,:) - v_i_b (ji,jj,:) ) * rhoic * r1_rdtice |
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191 | diag_vsnw(ji,jj) = diag_vsnw(ji,jj) + SUM( v_s (ji,jj,:) - v_s_b (ji,jj,:) ) * rhosn * r1_rdtice |
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192 | END DO |
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193 | END DO |
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194 | |
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195 | ENDIF |
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196 | |
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197 | ! conservation test |
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198 | IF( ln_limdiachk ) CALL ice_cons_hsm(1, 'icecor', zvi_b, zsmv_b, zei_b, zfw_b, zfs_b, zft_b) |
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199 | |
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200 | ! control prints |
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201 | IF( ln_ctl ) CALL ice_prt3D( 'icecor' ) |
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202 | IF( ln_limctl .AND. kn == 2 ) & |
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203 | & CALL ice_prt( kt, iiceprt, jiceprt, 2, ' - Final state - ' ) |
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204 | |
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205 | IF( nn_timing == 1 ) CALL timing_stop('icecor') |
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206 | |
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207 | END SUBROUTINE ice_cor |
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208 | |
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209 | #endif |
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210 | |
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211 | END MODULE icecor |
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