1 | MODULE obcfla |
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2 | !!====================================================================== |
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3 | !! *** MODULE obcfla *** |
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4 | !! Ocean dynamics: Flather's algorithm at open boundaries for the time-splitting |
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5 | !!====================================================================== |
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6 | !! History : 2.0 ! 2005-12 (V. Garnier) original code |
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7 | !! 3.3 ! 2010-11 (G. Madec) |
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8 | !!---------------------------------------------------------------------- |
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9 | #if defined key_obc && defined key_dynspg_ts |
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10 | !!---------------------------------------------------------------------- |
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11 | !! 'key_obc' and Open Boundary Condition |
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12 | !! 'key_dynspg_ts' free surface with time splitting |
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13 | !!---------------------------------------------------------------------- |
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14 | !! obc_fla_ts : call the subroutine for each open boundary |
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15 | !! obc_fla_ts_east : Flather on the east open boundary velocities & ssh |
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16 | !! obc_fla_ts_west : Flather on the west open boundary velocities & ssh |
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17 | !! obc_fla_ts_north : Flather on the north open boundary velocities & ssh |
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18 | !! obc_fla_ts_south : Flather on the south open boundary velocities & ssh |
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19 | !!---------------------------------------------------------------------- |
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20 | USE oce ! ocean dynamics and tracers |
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21 | USE dom_oce ! ocean space and time domain |
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22 | USE dynspg_oce ! surface pressure gradient variables |
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23 | USE phycst ! physical constants |
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24 | USE obc_oce ! ocean open boundary conditions |
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25 | USE obcdta ! ocean open boundary conditions: climatology |
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26 | |
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27 | IMPLICIT NONE |
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28 | PRIVATE |
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29 | |
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30 | PUBLIC obc_fla_ts ! routine called in dynspg_ts (free surface time splitting case) |
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31 | |
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32 | !!---------------------------------------------------------------------- |
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33 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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34 | !! $Id$ |
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35 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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36 | !!---------------------------------------------------------------------- |
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37 | CONTAINS |
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38 | |
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39 | SUBROUTINE obc_fla_ts |
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40 | !!---------------------------------------------------------------------- |
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41 | !! SUBROUTINE obc_fla_ts |
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42 | !! |
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43 | !! ** Purpose : Apply Flather's algorithm at open boundaries for the |
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44 | !! time-splitting free surface case (barotropic variables) |
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45 | !! |
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46 | !! This routine is called in dynspg_ts.F90 routine |
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47 | !! |
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48 | !! The logical variable lp_obc_east, and/or lp_obc_west, and/or lp_obc_north, |
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49 | !! and/or lp_obc_south allow the user to determine which boundary is an |
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50 | !! open one (must be done in the obc_par.F90 file). |
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51 | !! |
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52 | !! ** Reference : Flather, R. A., 1976, Mem. Soc. R. Sci. Liege, Ser. 6, 10, 141-164 |
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53 | !!---------------------------------------------------------------------- |
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54 | ! |
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55 | IF( lp_obc_east ) CALL obc_fla_ts_east |
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56 | IF( lp_obc_west ) CALL obc_fla_ts_west |
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57 | IF( lp_obc_north ) CALL obc_fla_ts_north |
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58 | IF( lp_obc_south ) CALL obc_fla_ts_south |
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59 | ! |
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60 | END SUBROUTINE obc_fla_ts |
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61 | |
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62 | |
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63 | SUBROUTINE obc_fla_ts_east |
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64 | !!---------------------------------------------------------------------- |
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65 | !! *** SUBROUTINE obc_fla_ts_east *** |
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66 | !! |
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67 | !! ** Purpose : Apply Flather's algorithm on east OBC velocities ua, va |
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68 | !! Fix sea surface height (sshn_e) on east open boundary |
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69 | !!---------------------------------------------------------------------- |
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70 | INTEGER :: ji, jj ! dummy loop indices |
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71 | !!---------------------------------------------------------------------- |
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72 | ! |
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73 | DO ji = nie0, nie1 |
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74 | DO jj = 1, jpj |
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75 | ua_e (ji,jj) = ( ubtfoe(jj) * hur(ji,jj) + SQRT( grav*hur(ji,jj) ) & |
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76 | & * ( ( sshn_e(ji,jj) + sshn_e(ji+1,jj) ) * 0.5 - sshfoe(jj) ) ) * uemsk(jj,1) |
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77 | sshfoe_b(ji,jj) = sshfoe_b(ji,jj) + SQRT( grav*hur(ji,jj) ) & |
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78 | & * ( ( sshn_e(ji,jj) + sshn_e(ji+1,jj) ) * 0.5 - sshfoe(jj) ) * uemsk(jj,1) |
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79 | END DO |
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80 | END DO |
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81 | DO ji = nie0p1, nie1p1 |
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82 | DO jj = 1, jpj |
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83 | ssha_e(ji,jj) = ssha_e(ji,jj) * ( 1. - temsk(jj,1) ) + temsk(jj,1) * sshfoe(jj) |
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84 | va_e (ji,jj) = vbtfoe(jj) * hvr(ji,jj) * uemsk(jj,1) |
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85 | END DO |
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86 | END DO |
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87 | ! |
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88 | END SUBROUTINE obc_fla_ts_east |
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89 | |
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90 | |
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91 | SUBROUTINE obc_fla_ts_west |
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92 | !!---------------------------------------------------------------------- |
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93 | !! *** SUBROUTINE obc_fla_ts_west *** |
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94 | !! |
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95 | !! ** Purpose : Apply Flather's algorithm on west OBC velocities ua, va |
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96 | !! Fix sea surface height (sshn_e) on west open boundary |
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97 | !!---------------------------------------------------------------------- |
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98 | INTEGER :: ji, jj ! dummy loop indices |
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99 | !!---------------------------------------------------------------------- |
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100 | ! |
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101 | DO ji = niw0, niw1 |
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102 | DO jj = 1, jpj |
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103 | ua_e (ji,jj) = ( ubtfow(jj) * hur(ji,jj) - sqrt( grav * hur(ji,jj) ) & |
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104 | & * ( ( sshn_e(ji,jj) + sshn_e(ji+1,jj) ) * 0.5 - sshfow(jj) ) ) * uwmsk(jj,1) |
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105 | va_e (ji,jj) = vbtfow(jj) * hvr(ji,jj) * uwmsk(jj,1) |
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106 | sshfow_b(ji,jj) = sshfow_b(ji,jj) - SQRT( grav * hur(ji,jj) ) & |
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107 | & * ( ( sshn_e(ji,jj) + sshn_e(ji+1,jj) ) * 0.5 - sshfow(jj) ) * uwmsk(jj,1) |
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108 | ssha_e (ji,jj) = ssha_e(ji,jj) * ( 1. - twmsk(jj,1) ) + twmsk(jj,1)*sshfow(jj) |
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109 | END DO |
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110 | END DO |
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111 | ! |
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112 | END SUBROUTINE obc_fla_ts_west |
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113 | |
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114 | |
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115 | SUBROUTINE obc_fla_ts_north |
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116 | !!---------------------------------------------------------------------- |
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117 | !! SUBROUTINE obc_fla_ts_north |
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118 | !! |
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119 | !! ** Purpose : Apply Flather's algorithm on north OBC velocities ua, va |
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120 | !! Fix sea surface height (sshn_e) on north open boundary |
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121 | !!---------------------------------------------------------------------- |
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122 | INTEGER :: ji, jj ! dummy loop indices |
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123 | !!---------------------------------------------------------------------- |
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124 | ! |
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125 | DO jj = njn0, njn1 |
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126 | DO ji = 1, jpi |
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127 | va_e (ji,jj) = ( vbtfon(ji) * hvr(ji,jj) + sqrt( grav * hvr(ji,jj) ) & |
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128 | & * ( ( sshn_e(ji,jj) + sshn_e(ji,jj+1) ) * 0.5 - sshfon(ji) ) ) * vnmsk(ji,1) |
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129 | sshfon_b(ji,jj) = sshfon_b(ji,jj) + sqrt( grav * hvr(ji,jj) ) & |
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130 | & * ( ( sshn_e(ji,jj) + sshn_e(ji,jj+1) ) * 0.5 - sshfon(ji) ) * vnmsk(ji,1) |
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131 | END DO |
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132 | END DO |
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133 | DO jj = njn0p1, njn1p1 |
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134 | DO ji = 1, jpi |
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135 | ssha_e(ji,jj) = ssha_e(ji,jj) * ( 1. - tnmsk(ji,1) ) + sshfon(ji) * tnmsk(ji,1) |
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136 | ua_e (ji,jj) = ubtfon(ji) * hur(ji,jj) * vnmsk(ji,1) |
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137 | END DO |
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138 | END DO |
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139 | ! |
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140 | END SUBROUTINE obc_fla_ts_north |
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141 | |
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142 | |
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143 | SUBROUTINE obc_fla_ts_south |
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144 | !!---------------------------------------------------------------------- |
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145 | !! SUBROUTINE obc_fla_ts_south |
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146 | !! |
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147 | !! ** Purpose : Apply Flather's algorithm on south OBC velocities ua, va |
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148 | !! Fix sea surface height (sshn_e) on south open boundary |
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149 | !!---------------------------------------------------------------------- |
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150 | INTEGER :: ji, jj ! dummy loop indices |
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151 | !!---------------------------------------------------------------------- |
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152 | ! |
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153 | DO jj = njs0, njs1 |
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154 | DO ji = 1, jpi |
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155 | va_e (ji,jj) = ( vbtfos(ji) * hvr(ji,jj) - sqrt( grav * hvr(ji,jj) ) & |
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156 | & * ( ( sshn_e(ji,jj) + sshn_e(ji,jj+1) ) * 0.5 - sshfos(ji) ) ) * vsmsk(ji,1) |
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157 | ua_e (ji,jj) = ubtfos(ji) * hur(ji,jj) * vsmsk(ji,1) |
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158 | sshfos_b(ji,jj) = sshfos_b(ji,jj) - sqrt( grav * hvr(ji,jj) ) & |
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159 | & * ( ( sshn_e(ji,jj) + sshn_e(ji,jj+1) ) * 0.5 - sshfos(ji) ) * vsmsk(ji,1) |
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160 | ssha_e (ji,jj) = ssha_e(ji,jj) * (1. - tsmsk(ji,1) ) + tsmsk(ji,1) * sshfos(ji) |
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161 | END DO |
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162 | END DO |
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163 | ! |
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164 | END SUBROUTINE obc_fla_ts_south |
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165 | |
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166 | #else |
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167 | !!---------------------------------------------------------------------- |
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168 | !! Dummy module : No OBC or time-splitting |
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169 | !!---------------------------------------------------------------------- |
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170 | CONTAINS |
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171 | |
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172 | SUBROUTINE obc_fla_ts |
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173 | WRITE(*,*) 'obc_fla_ts: You should not have seen this print! error?' |
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174 | END SUBROUTINE obc_fla_ts |
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175 | #endif |
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176 | !!====================================================================== |
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177 | END MODULE obcfla |
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