1 | MODULE bdytra |
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2 | !!====================================================================== |
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3 | !! *** MODULE bdytra *** |
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4 | !! Ocean tracers: Apply boundary conditions for tracers |
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5 | !!====================================================================== |
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6 | !! History : 1.0 ! 2005-01 (J. Chanut, A. Sellar) Original code |
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7 | !! 3.0 ! 2008-04 (NEMO team) add in the reference version |
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8 | !! 3.4 ! 2011 (D. Storkey) rewrite in preparation for OBC-BDY merge |
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9 | !!---------------------------------------------------------------------- |
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10 | #if defined key_bdy |
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11 | !!---------------------------------------------------------------------- |
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12 | !! 'key_bdy' Unstructured Open Boundary Conditions |
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13 | !!---------------------------------------------------------------------- |
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14 | !! bdy_tra : Apply open boundary conditions to T and S |
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15 | !! bdy_tra_frs : Apply Flow Relaxation Scheme |
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16 | !!---------------------------------------------------------------------- |
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17 | USE timing ! Timing |
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18 | USE oce ! ocean dynamics and tracers variables |
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19 | USE dom_oce ! ocean space and time domain variables |
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20 | USE bdy_oce ! ocean open boundary conditions |
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21 | USE bdydta, ONLY: bf |
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22 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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23 | USE in_out_manager ! I/O manager |
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24 | |
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25 | |
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26 | IMPLICIT NONE |
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27 | PRIVATE |
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28 | |
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29 | PUBLIC bdy_tra ! routine called in tranxt.F90 |
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30 | PUBLIC bdy_tra_dmp ! routine called in step.F90 |
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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 bdy_tra( kt ) |
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40 | !!---------------------------------------------------------------------- |
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41 | !! *** SUBROUTINE bdy_tra *** |
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42 | !! |
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43 | !! ** Purpose : - Apply open boundary conditions for temperature and salinity |
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44 | !! |
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45 | !!---------------------------------------------------------------------- |
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46 | INTEGER, INTENT( in ) :: kt ! Main time step counter |
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47 | !! |
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48 | INTEGER :: ib_bdy ! Loop index |
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49 | |
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50 | DO ib_bdy=1, nb_bdy |
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51 | |
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52 | SELECT CASE( nn_tra(ib_bdy) ) |
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53 | CASE(jp_none) |
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54 | CYCLE |
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55 | CASE(jp_frs) |
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56 | CALL bdy_tra_frs( idx_bdy(ib_bdy), dta_bdy(ib_bdy), kt ) |
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57 | CASE(2) |
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58 | CALL bdy_tra_spe( idx_bdy(ib_bdy), dta_bdy(ib_bdy), kt ) |
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59 | CASE(3) |
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60 | CALL bdy_tra_nmn( idx_bdy(ib_bdy), dta_bdy(ib_bdy), kt ) |
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61 | CASE(4) |
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62 | CALL bdy_tra_rnf( idx_bdy(ib_bdy), dta_bdy(ib_bdy), kt ) |
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63 | CASE DEFAULT |
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64 | CALL ctl_stop( 'bdy_tra : unrecognised option for open boundaries for T and S' ) |
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65 | END SELECT |
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66 | ENDDO |
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67 | ! |
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68 | ! Boundary points should be updated |
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69 | IF (nb_bdy>0) CALL lbc_lnk( tsa(:,:,:,jp_tem), 'T', 1. ) |
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70 | IF (nb_bdy>0) CALL lbc_lnk( tsa(:,:,:,jp_sal), 'T', 1. ) |
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71 | |
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72 | END SUBROUTINE bdy_tra |
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73 | |
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74 | SUBROUTINE bdy_tra_frs( idx, dta, kt ) |
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75 | !!---------------------------------------------------------------------- |
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76 | !! *** SUBROUTINE bdy_tra_frs *** |
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77 | !! |
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78 | !! ** Purpose : Apply the Flow Relaxation Scheme for tracers at open boundaries. |
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79 | !! |
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80 | !! Reference : Engedahl H., 1995, Tellus, 365-382. |
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81 | !!---------------------------------------------------------------------- |
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82 | INTEGER, INTENT(in) :: kt |
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83 | TYPE(OBC_INDEX), INTENT(in) :: idx ! OBC indices |
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84 | TYPE(OBC_DATA), INTENT(in) :: dta ! OBC external data |
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85 | !! |
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86 | REAL(wp) :: zwgt ! boundary weight |
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87 | INTEGER :: ib, ik, igrd ! dummy loop indices |
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88 | INTEGER :: ii, ij ! 2D addresses |
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89 | !!---------------------------------------------------------------------- |
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90 | ! |
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91 | IF( nn_timing == 1 ) CALL timing_start('bdy_tra_frs') |
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92 | ! |
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93 | igrd = 1 ! Everything is at T-points here |
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94 | DO ib = 1, idx%nblen(igrd) |
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95 | DO ik = 1, jpkm1 |
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96 | ii = idx%nbi(ib,igrd) |
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97 | ij = idx%nbj(ib,igrd) |
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98 | zwgt = idx%nbw(ib,igrd) |
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99 | tsa(ii,ij,ik,jp_tem) = ( tsa(ii,ij,ik,jp_tem) + zwgt * ( dta%tem(ib,ik) - tsa(ii,ij,ik,jp_tem) ) ) * tmask(ii,ij,ik) |
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100 | tsa(ii,ij,ik,jp_sal) = ( tsa(ii,ij,ik,jp_sal) + zwgt * ( dta%sal(ib,ik) - tsa(ii,ij,ik,jp_sal) ) ) * tmask(ii,ij,ik) |
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101 | END DO |
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102 | END DO |
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103 | ! |
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104 | IF( kt .eq. nit000 ) CLOSE( unit = 102 ) |
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105 | ! |
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106 | IF( nn_timing == 1 ) CALL timing_stop('bdy_tra_frs') |
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107 | ! |
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108 | END SUBROUTINE bdy_tra_frs |
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109 | |
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110 | SUBROUTINE bdy_tra_spe( idx, dta, kt ) |
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111 | !!---------------------------------------------------------------------- |
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112 | !! *** SUBROUTINE bdy_tra_frs *** |
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113 | !! |
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114 | !! ** Purpose : Apply a specified value for tracers at open boundaries. |
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115 | !! |
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116 | !!---------------------------------------------------------------------- |
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117 | INTEGER, INTENT(in) :: kt |
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118 | TYPE(OBC_INDEX), INTENT(in) :: idx ! OBC indices |
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119 | TYPE(OBC_DATA), INTENT(in) :: dta ! OBC external data |
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120 | !! |
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121 | REAL(wp) :: zwgt ! boundary weight |
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122 | INTEGER :: ib, ik, igrd ! dummy loop indices |
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123 | INTEGER :: ii, ij ! 2D addresses |
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124 | !!---------------------------------------------------------------------- |
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125 | ! |
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126 | IF( nn_timing == 1 ) CALL timing_start('bdy_tra_spe') |
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127 | ! |
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128 | igrd = 1 ! Everything is at T-points here |
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129 | DO ib = 1, idx%nblenrim(igrd) |
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130 | ii = idx%nbi(ib,igrd) |
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131 | ij = idx%nbj(ib,igrd) |
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132 | DO ik = 1, jpkm1 |
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133 | tsa(ii,ij,ik,jp_tem) = dta%tem(ib,ik) * tmask(ii,ij,ik) |
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134 | tsa(ii,ij,ik,jp_sal) = dta%sal(ib,ik) * tmask(ii,ij,ik) |
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135 | END DO |
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136 | END DO |
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137 | ! |
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138 | IF( kt .eq. nit000 ) CLOSE( unit = 102 ) |
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139 | ! |
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140 | IF( nn_timing == 1 ) CALL timing_stop('bdy_tra_spe') |
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141 | ! |
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142 | END SUBROUTINE bdy_tra_spe |
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143 | |
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144 | SUBROUTINE bdy_tra_nmn( idx, dta, kt ) |
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145 | !!---------------------------------------------------------------------- |
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146 | !! *** SUBROUTINE bdy_tra_nmn *** |
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147 | !! |
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148 | !! ** Purpose : Duplicate the value for tracers at open boundaries. |
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149 | !! |
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150 | !!---------------------------------------------------------------------- |
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151 | INTEGER, INTENT(in) :: kt |
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152 | TYPE(OBC_INDEX), INTENT(in) :: idx ! OBC indices |
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153 | TYPE(OBC_DATA), INTENT(in) :: dta ! OBC external data |
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154 | !! |
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155 | REAL(wp) :: zwgt ! boundary weight |
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156 | INTEGER :: ib, ik, igrd ! dummy loop indices |
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157 | INTEGER :: ii, ij,zcoef, zcoef1,zcoef2, ip, jp ! 2D addresses |
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158 | !!---------------------------------------------------------------------- |
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159 | ! |
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160 | IF( nn_timing == 1 ) CALL timing_start('bdy_tra_nmn') |
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161 | ! |
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162 | igrd = 1 ! Everything is at T-points here |
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163 | DO ib = 1, idx%nblenrim(igrd) |
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164 | ii = idx%nbi(ib,igrd) |
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165 | ij = idx%nbj(ib,igrd) |
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166 | DO ik = 1, jpkm1 |
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167 | ! search the sense of the gradient |
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168 | zcoef1 = bdytmask(ii-1,ij ) + bdytmask(ii+1,ij ) |
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169 | zcoef2 = bdytmask(ii ,ij-1) + bdytmask(ii ,ij+1) |
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170 | IF ( zcoef1+zcoef2 == 0) THEN |
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171 | ! corner |
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172 | zcoef = tmask(ii-1,ij,ik) + tmask(ii+1,ij,ik) + tmask(ii,ij-1,ik) + tmask(ii,ij+1,ik) |
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173 | tsa(ii,ij,ik,jp_tem) = tsa(ii-1,ij ,ik,jp_tem) * tmask(ii-1,ij ,ik) + & |
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174 | & tsa(ii+1,ij ,ik,jp_tem) * tmask(ii+1,ij ,ik) + & |
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175 | & tsa(ii ,ij-1,ik,jp_tem) * tmask(ii ,ij-1,ik) + & |
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176 | & tsa(ii ,ij+1,ik,jp_tem) * tmask(ii ,ij+1,ik) |
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177 | tsa(ii,ij,ik,jp_tem) = ( tsa(ii,ij,ik,jp_tem) / MAX( 1, zcoef) ) * tmask(ii,ij,ik) |
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178 | tsa(ii,ij,ik,jp_sal) = tsa(ii-1,ij ,ik,jp_sal) * tmask(ii-1,ij ,ik) + & |
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179 | & tsa(ii+1,ij ,ik,jp_sal) * tmask(ii+1,ij ,ik) + & |
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180 | & tsa(ii ,ij-1,ik,jp_sal) * tmask(ii ,ij-1,ik) + & |
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181 | & tsa(ii ,ij+1,ik,jp_sal) * tmask(ii ,ij+1,ik) |
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182 | tsa(ii,ij,ik,jp_sal) = ( tsa(ii,ij,ik,jp_sal) / MAX( 1, zcoef) ) * tmask(ii,ij,ik) |
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183 | ELSE |
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184 | ip = bdytmask(ii+1,ij ) - bdytmask(ii-1,ij ) |
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185 | jp = bdytmask(ii ,ij+1) - bdytmask(ii ,ij-1) |
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186 | tsa(ii,ij,ik,jp_tem) = tsa(ii+ip,ij+jp,ik,jp_tem) * tmask(ii+ip,ij+jp,ik) |
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187 | tsa(ii,ij,ik,jp_sal) = tsa(ii+ip,ij+jp,ik,jp_sal) * tmask(ii+ip,ij+jp,ik) |
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188 | ENDIF |
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189 | END DO |
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190 | END DO |
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191 | ! |
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192 | IF( kt .eq. nit000 ) CLOSE( unit = 102 ) |
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193 | ! |
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194 | IF( nn_timing == 1 ) CALL timing_stop('bdy_tra_nmn') |
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195 | ! |
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196 | END SUBROUTINE bdy_tra_nmn |
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197 | |
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198 | SUBROUTINE bdy_tra_rnf( idx, dta, kt ) |
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199 | !!---------------------------------------------------------------------- |
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200 | !! *** SUBROUTINE bdy_tra_rnf *** |
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201 | !! |
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202 | !! ** Purpose : Apply the runoff values for tracers at open boundaries: |
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203 | !! - specified to 0.1 PSU for the salinity |
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204 | !! - duplicate the value for the temperature |
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205 | !! |
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206 | !!---------------------------------------------------------------------- |
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207 | INTEGER, INTENT(in) :: kt |
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208 | TYPE(OBC_INDEX), INTENT(in) :: idx ! OBC indices |
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209 | TYPE(OBC_DATA), INTENT(in) :: dta ! OBC external data |
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210 | !! |
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211 | REAL(wp) :: zwgt ! boundary weight |
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212 | INTEGER :: ib, ik, igrd ! dummy loop indices |
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213 | INTEGER :: ii, ij, ip, jp ! 2D addresses |
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214 | !!---------------------------------------------------------------------- |
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215 | ! |
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216 | IF( nn_timing == 1 ) CALL timing_start('bdy_tra_rnf') |
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217 | ! |
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218 | igrd = 1 ! Everything is at T-points here |
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219 | DO ib = 1, idx%nblenrim(igrd) |
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220 | ii = idx%nbi(ib,igrd) |
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221 | ij = idx%nbj(ib,igrd) |
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222 | DO ik = 1, jpkm1 |
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223 | ip = bdytmask(ii+1,ij ) - bdytmask(ii-1,ij ) |
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224 | jp = bdytmask(ii ,ij+1) - bdytmask(ii ,ij-1) |
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225 | tsa(ii,ij,ik,jp_tem) = tsa(ii+ip,ij+jp,ik,jp_tem) * tmask(ii,ij,ik) |
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226 | tsa(ii,ij,ik,jp_sal) = 0.1 * tmask(ii,ij,ik) |
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227 | END DO |
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228 | END DO |
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229 | ! |
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230 | IF( kt .eq. nit000 ) CLOSE( unit = 102 ) |
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231 | ! |
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232 | IF( nn_timing == 1 ) CALL timing_stop('bdy_tra_rnf') |
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233 | ! |
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234 | END SUBROUTINE bdy_tra_rnf |
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235 | |
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236 | SUBROUTINE bdy_tra_dmp( kt ) |
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237 | !!---------------------------------------------------------------------- |
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238 | !! *** SUBROUTINE bdy_tra_dmp *** |
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239 | !! |
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240 | !! ** Purpose : Apply damping for tracers at open boundaries. |
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241 | !! |
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242 | !!---------------------------------------------------------------------- |
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243 | INTEGER, INTENT(in) :: kt |
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244 | !! |
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245 | REAL(wp) :: zwgt ! boundary weight |
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246 | REAL(wp) :: zta, zsa, ztime |
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247 | INTEGER :: ib, ik, igrd ! dummy loop indices |
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248 | INTEGER :: ii, ij ! 2D addresses |
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249 | INTEGER :: ib_bdy ! Loop index |
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250 | !!---------------------------------------------------------------------- |
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251 | ! |
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252 | IF( nn_timing == 1 ) CALL timing_start('bdy_tra_dmp') |
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253 | ! |
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254 | DO ib_bdy=1, nb_bdy |
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255 | IF ( ln_tra_dmp(ib_bdy) ) THEN |
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256 | igrd = 1 ! Everything is at T-points here |
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257 | DO ib = 1, idx_bdy(ib_bdy)%nblen(igrd) |
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258 | ii = idx_bdy(ib_bdy)%nbi(ib,igrd) |
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259 | ij = idx_bdy(ib_bdy)%nbj(ib,igrd) |
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260 | zwgt = idx_bdy(ib_bdy)%nbd(ib,igrd) |
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261 | DO ik = 1, jpkm1 |
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262 | zta = zwgt * ( dta_bdy(ib_bdy)%tem(ib,ik) - tsb(ii,ij,ik,jp_tem) ) * tmask(ii,ij,ik) |
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263 | zsa = zwgt * ( dta_bdy(ib_bdy)%sal(ib,ik) - tsb(ii,ij,ik,jp_sal) ) * tmask(ii,ij,ik) |
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264 | tsa(ii,ij,ik,jp_tem) = tsa(ii,ij,ik,jp_tem) + zta |
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265 | tsa(ii,ij,ik,jp_sal) = tsa(ii,ij,ik,jp_sal) + zsa |
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266 | END DO |
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267 | END DO |
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268 | ENDIF |
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269 | ENDDO |
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270 | ! |
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271 | IF( nn_timing == 1 ) CALL timing_stop('bdy_tra_dmp') |
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272 | ! |
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273 | END SUBROUTINE bdy_tra_dmp |
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274 | |
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275 | #else |
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276 | !!---------------------------------------------------------------------- |
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277 | !! Dummy module NO Unstruct Open Boundary Conditions |
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278 | !!---------------------------------------------------------------------- |
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279 | CONTAINS |
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280 | SUBROUTINE bdy_tra(kt) ! Empty routine |
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281 | WRITE(*,*) 'bdy_tra: You should not have seen this print! error?', kt |
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282 | END SUBROUTINE bdy_tra |
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283 | #endif |
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284 | |
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285 | !!====================================================================== |
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286 | END MODULE bdytra |
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