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 | !! 4.0 ! 2011-02 (G. Madec) velocity & ssh passed in argument |
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9 | !!---------------------------------------------------------------------- |
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10 | #if defined key_obc && defined key_dynspg_ts |
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11 | !!---------------------------------------------------------------------- |
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12 | !! 'key_obc' and Open Boundary Condition |
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13 | !! 'key_dynspg_ts' free surface with time splitting |
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14 | !!---------------------------------------------------------------------- |
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15 | !! obc_fla_ts : call the subroutine for each open boundary |
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16 | !! obc_fla_ts_east : Flather on the east open boundary velocities & ssh |
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17 | !! obc_fla_ts_west : Flather on the west open boundary velocities & ssh |
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18 | !! obc_fla_ts_north : Flather on the north open boundary velocities & ssh |
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19 | !! obc_fla_ts_south : Flather on the south open boundary velocities & ssh |
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20 | !!---------------------------------------------------------------------- |
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21 | USE oce ! ocean dynamics and tracers |
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22 | USE dom_oce ! ocean space and time domain |
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23 | USE dynspg_oce ! surface pressure gradient variables |
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24 | USE phycst ! physical constants |
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25 | USE obc_oce ! ocean open boundary conditions |
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26 | USE obcdta ! ocean open boundary conditions: climatology |
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27 | |
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28 | IMPLICIT NONE |
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29 | PRIVATE |
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30 | |
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31 | PUBLIC obc_fla_ts ! routine called in dynspg_ts (free surface time splitting case) |
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32 | |
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33 | !!---------------------------------------------------------------------- |
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34 | !! NEMO/OPA 4.0 , NEMO Consortium (2011) |
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35 | !! $Id: obcfla.F90 2715 2011-03-30 15:58:35Z rblod $ |
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36 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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37 | !!---------------------------------------------------------------------- |
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38 | CONTAINS |
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39 | |
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40 | SUBROUTINE obc_fla_ts( pua, pva, p_sshn, p_ssha ) |
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41 | !!---------------------------------------------------------------------- |
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42 | !! SUBROUTINE obc_fla_ts |
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43 | !! |
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44 | !! ** Purpose : Apply Flather's algorithm at open boundaries for the |
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45 | !! time-splitting free surface case (barotropic variables) |
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46 | !! |
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47 | !! This routine is called in dynspg_ts.F90 routine |
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48 | !! |
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49 | !! The logical variable lp_obc_east, and/or lp_obc_west, and/or lp_obc_north, |
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50 | !! and/or lp_obc_south allow the user to determine which boundary is an |
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51 | !! open one (must be done in the obc_par.F90 file). |
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52 | !! |
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53 | !! ** Reference : Flather, R. A., 1976, Mem. Soc. R. Sci. Liege, Ser. 6, 10, 141-164 |
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54 | !!---------------------------------------------------------------------- |
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55 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pua , pva ! after barotropic velocities |
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56 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: p_sshn, p_ssha ! before, now, after sea surface height |
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57 | !!---------------------------------------------------------------------- |
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58 | ! |
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59 | IF( lp_obc_east ) CALL obc_fla_ts_east ( pua, pva, p_sshn, p_ssha ) |
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60 | IF( lp_obc_west ) CALL obc_fla_ts_west ( pua, pva, p_sshn, p_ssha ) |
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61 | IF( lp_obc_north ) CALL obc_fla_ts_north( pua, pva, p_sshn, p_ssha ) |
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62 | IF( lp_obc_south ) CALL obc_fla_ts_south( pua, pva, p_sshn, p_ssha ) |
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63 | ! |
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64 | END SUBROUTINE obc_fla_ts |
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65 | |
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66 | |
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67 | SUBROUTINE obc_fla_ts_east( pua, pva, p_sshn, p_ssha ) |
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68 | !!---------------------------------------------------------------------- |
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69 | !! *** SUBROUTINE obc_fla_ts_east *** |
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70 | !! |
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71 | !! ** Purpose : Apply Flather's algorithm on east OBC velocities ua, va |
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72 | !! Fix sea surface height (p_sshn) on east open boundary |
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73 | !!---------------------------------------------------------------------- |
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74 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pua , pva ! after barotropic velocities |
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75 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: p_sshn, p_ssha ! before, now, after sea surface height |
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76 | ! |
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77 | INTEGER :: ji, jj ! dummy loop indices |
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78 | !!---------------------------------------------------------------------- |
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79 | ! |
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80 | DO ji = nie0, nie1 |
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81 | DO jj = 1, jpj |
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82 | pua (ji,jj) = ( ubtfoe(jj) * hur(ji,jj) + SQRT( grav*hur(ji,jj) ) & |
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83 | & * ( ( p_sshn(ji,jj) + p_sshn(ji+1,jj) ) * 0.5 - sshfoe(jj) ) ) * uemsk(jj,1) |
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84 | sshfoe_b(ji,jj) = sshfoe_b(ji,jj) + SQRT( grav*hur(ji,jj) ) & |
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85 | & * ( ( p_sshn(ji,jj) + p_sshn(ji+1,jj) ) * 0.5 - sshfoe(jj) ) * uemsk(jj,1) |
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86 | END DO |
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87 | END DO |
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88 | DO ji = nie0p1, nie1p1 |
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89 | DO jj = 1, jpj |
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90 | p_ssha(ji,jj) = p_ssha(ji,jj) * ( 1. - temsk(jj,1) ) + temsk(jj,1) * sshfoe(jj) |
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91 | pva (ji,jj) = vbtfoe(jj) * hvr(ji,jj) * uemsk(jj,1) |
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92 | END DO |
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93 | END DO |
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94 | ! |
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95 | END SUBROUTINE obc_fla_ts_east |
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96 | |
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97 | |
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98 | SUBROUTINE obc_fla_ts_west( pua, pva, p_sshn, p_ssha ) |
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99 | !!---------------------------------------------------------------------- |
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100 | !! *** SUBROUTINE obc_fla_ts_west *** |
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101 | !! |
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102 | !! ** Purpose : Apply Flather's algorithm on west OBC velocities ua, va |
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103 | !! Fix sea surface height (p_sshn) on west open boundary |
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104 | !!---------------------------------------------------------------------- |
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105 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pua , pva ! after barotropic velocities |
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106 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: p_sshn, p_ssha ! before, now, after sea surface height |
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107 | ! |
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108 | INTEGER :: ji, jj ! dummy loop indices |
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109 | !!---------------------------------------------------------------------- |
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110 | ! |
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111 | DO ji = niw0, niw1 |
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112 | DO jj = 1, jpj |
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113 | pua (ji,jj) = ( ubtfow(jj) * hur(ji,jj) - sqrt( grav * hur(ji,jj) ) & |
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114 | & * ( ( p_sshn(ji,jj) + p_sshn(ji+1,jj) ) * 0.5 - sshfow(jj) ) ) * uwmsk(jj,1) |
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115 | pva (ji,jj) = vbtfow(jj) * hvr(ji,jj) * uwmsk(jj,1) |
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116 | sshfow_b(ji,jj) = sshfow_b(ji,jj) - SQRT( grav * hur(ji,jj) ) & |
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117 | & * ( ( p_sshn(ji,jj) + p_sshn(ji+1,jj) ) * 0.5 - sshfow(jj) ) * uwmsk(jj,1) |
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118 | p_ssha (ji,jj) = p_ssha(ji,jj) * ( 1. - twmsk(jj,1) ) + twmsk(jj,1)*sshfow(jj) |
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119 | END DO |
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120 | END DO |
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121 | ! |
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122 | END SUBROUTINE obc_fla_ts_west |
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123 | |
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124 | |
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125 | SUBROUTINE obc_fla_ts_north( pua, pva, p_sshn, p_ssha ) |
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126 | !!---------------------------------------------------------------------- |
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127 | !! SUBROUTINE obc_fla_ts_north |
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128 | !! |
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129 | !! ** Purpose : Apply Flather's algorithm on north OBC velocities ua, va |
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130 | !! Fix sea surface height (p_sshn) on north open boundary |
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131 | !!---------------------------------------------------------------------- |
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132 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pua , pva ! after barotropic velocities |
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133 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: p_sshn, p_ssha ! before, now, after sea surface height |
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134 | ! |
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135 | INTEGER :: ji, jj ! dummy loop indices |
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136 | !!---------------------------------------------------------------------- |
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137 | ! |
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138 | DO jj = njn0, njn1 |
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139 | DO ji = 1, jpi |
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140 | pva (ji,jj) = ( vbtfon(ji) * hvr(ji,jj) + sqrt( grav * hvr(ji,jj) ) & |
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141 | & * ( ( p_sshn(ji,jj) + p_sshn(ji,jj+1) ) * 0.5 - sshfon(ji) ) ) * vnmsk(ji,1) |
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142 | sshfon_b(ji,jj) = sshfon_b(ji,jj) + sqrt( grav * hvr(ji,jj) ) & |
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143 | & * ( ( p_sshn(ji,jj) + p_sshn(ji,jj+1) ) * 0.5 - sshfon(ji) ) * vnmsk(ji,1) |
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144 | END DO |
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145 | END DO |
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146 | DO jj = njn0p1, njn1p1 |
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147 | DO ji = 1, jpi |
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148 | p_ssha(ji,jj) = p_ssha(ji,jj) * ( 1. - tnmsk(ji,1) ) + sshfon(ji) * tnmsk(ji,1) |
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149 | pua (ji,jj) = ubtfon(ji) * hur(ji,jj) * vnmsk(ji,1) |
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150 | END DO |
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151 | END DO |
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152 | ! |
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153 | END SUBROUTINE obc_fla_ts_north |
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154 | |
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155 | |
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156 | SUBROUTINE obc_fla_ts_south( pua, pva, p_sshn, p_ssha ) |
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157 | !!---------------------------------------------------------------------- |
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158 | !! SUBROUTINE obc_fla_ts_south |
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159 | !! |
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160 | !! ** Purpose : Apply Flather's algorithm on south OBC velocities ua, va |
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161 | !! Fix sea surface height (p_sshn) on south open boundary |
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162 | !!---------------------------------------------------------------------- |
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163 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: pua , pva ! after barotropic velocities |
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164 | REAL(wp), DIMENSION(jpi,jpj), INTENT(inout) :: p_sshn, p_ssha ! before, now, after sea surface height |
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165 | ! |
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166 | INTEGER :: ji, jj ! dummy loop indices |
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167 | !!---------------------------------------------------------------------- |
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168 | ! |
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169 | DO jj = njs0, njs1 |
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170 | DO ji = 1, jpi |
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171 | pva (ji,jj) = ( vbtfos(ji) * hvr(ji,jj) - sqrt( grav * hvr(ji,jj) ) & |
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172 | & * ( ( p_sshn(ji,jj) + p_sshn(ji,jj+1) ) * 0.5 - sshfos(ji) ) ) * vsmsk(ji,1) |
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173 | pua (ji,jj) = ubtfos(ji) * hur(ji,jj) * vsmsk(ji,1) |
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174 | sshfos_b(ji,jj) = sshfos_b(ji,jj) - sqrt( grav * hvr(ji,jj) ) & |
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175 | & * ( ( p_sshn(ji,jj) + p_sshn(ji,jj+1) ) * 0.5 - sshfos(ji) ) * vsmsk(ji,1) |
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176 | p_ssha (ji,jj) = p_ssha(ji,jj) * (1. - tsmsk(ji,1) ) + tsmsk(ji,1) * sshfos(ji) |
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177 | END DO |
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178 | END DO |
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179 | ! |
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180 | END SUBROUTINE obc_fla_ts_south |
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181 | |
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182 | #else |
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183 | !!---------------------------------------------------------------------- |
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184 | !! Dummy module : No OBC or time-splitting |
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185 | !!---------------------------------------------------------------------- |
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186 | CONTAINS |
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187 | SUBROUTINE obc_fla_ts( pua, pva, p_sshn, p_ssha ) |
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188 | REAL, DIMENSION(:,:):: pua, pva, p_sshn, p_ssha |
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189 | WRITE(*,*) 'obc_fla_ts: You should not have seen this print! error?', pua(1,1), pva(1,1), p_sshn(1,1), p_ssha(1,1) |
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190 | END SUBROUTINE obc_fla_ts |
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191 | #endif |
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192 | !!====================================================================== |
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193 | END MODULE obcfla |
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