1 | MODULE dynzdf_imp_tam |
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2 | #if defined key_tam |
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3 | !!============================================================================== |
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4 | !! *** MODULE dynzdf_imp_tam *** |
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5 | !! Ocean dynamics: vertical component(s) of the momentum mixing trend |
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6 | !! Tangent and Adjoint Module |
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7 | !!============================================================================== |
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8 | !! History of the direct module: |
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9 | !! ! 90-10 (B. Blanke) Original code |
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10 | !! ! 97-05 (G. Madec) vertical component of isopycnal |
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11 | !! 8.5 ! 02-08 (G. Madec) F90: Free form and module |
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12 | !! History of the TAM module: |
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13 | !! 9.0 ! 09-01 (A. Vidard) TAM of the 02-08 version |
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14 | !!---------------------------------------------------------------------- |
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15 | |
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16 | !!---------------------------------------------------------------------- |
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17 | !! dyn_zdf_imp : update the momentum trend with the vertical diffu- |
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18 | !! sion using an implicit time-stepping scheme. |
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19 | !!---------------------------------------------------------------------- |
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20 | !! * Modules used |
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21 | USE par_oce |
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22 | USE oce_tam |
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23 | USE zdf_oce |
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24 | USE dom_oce |
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25 | USE phycst |
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26 | USE in_out_manager |
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27 | USE lib_mpp ! MPP library |
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28 | USE zdfbfr ! Bottom friction setup |
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29 | USE wrk_nemo ! Memory Allocation |
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30 | USE timing ! Timing |
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31 | |
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32 | IMPLICIT NONE |
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33 | PRIVATE |
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34 | |
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35 | !! * Routine accessibility |
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36 | PUBLIC dyn_zdf_imp_tan ! called by dynzdf_tam.F90 |
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37 | PUBLIC dyn_zdf_imp_adj ! called by dynzdf_tam.F90 |
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38 | |
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39 | !! * Substitutions |
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40 | # include "domzgr_substitute.h90" |
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41 | # include "vectopt_loop_substitute.h90" |
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42 | !!---------------------------------------------------------------------- |
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43 | |
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44 | CONTAINS |
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45 | |
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46 | SUBROUTINE dyn_zdf_imp_tan( kt, p2dt ) |
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47 | !!---------------------------------------------------------------------- |
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48 | !! *** ROUTINE dyn_zdf_imp_tan *** |
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49 | !! |
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50 | !! ** Purpose of the direct routine: |
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51 | !! Compute the trend due to the vert. momentum diffusion |
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52 | !! and the surface forcing, and add it to the general trend of |
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53 | !! the momentum equations. |
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54 | !! |
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55 | !! ** Method of the direct routine: |
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56 | !! The vertical momentum mixing trend is given by : |
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57 | !! dz( avmu dz(u) ) = 1/e3u dk+1( avmu/e3uw dk(ua) ) |
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58 | !! backward time stepping |
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59 | !! Surface boundary conditions: wind stress input |
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60 | !! Bottom boundary conditions : bottom stress (cf zdfbfr.F) |
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61 | !! Add this trend to the general trend ua : |
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62 | !! ua = ua + dz( avmu dz(u) )E |
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63 | !! |
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64 | !! ** Action : - Update (ua,va) arrays with the after vertical diffusive |
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65 | !! mixing trend. |
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66 | !!--------------------------------------------------------------------- |
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67 | !! * Modules used |
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68 | !! * Arguments |
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69 | INTEGER , INTENT( in ) :: kt ! ocean time-step index |
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70 | REAL(wp), INTENT( in ) :: p2dt ! time-step |
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71 | |
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72 | !! * Local declarations |
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73 | INTEGER :: ji, jj, jk ! dummy loop indices |
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74 | REAL(wp) :: z1_p2dt, z2dtf, zcoef, zzws, zrhstl ! temporary scalars |
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75 | REAL(wp), POINTER, DIMENSION(:,:,:):: zwi, zws, zwd ! temporary workspace arrays |
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76 | !!---------------------------------------------------------------------- |
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77 | ! |
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78 | IF( nn_timing == 1 ) CALL timing_start('dyn_zdf_imp_tan') |
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79 | ! |
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80 | CALL wrk_alloc( jpi,jpj,jpk, zwi, zwd, zws ) |
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81 | ! |
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82 | IF( kt == nit000 ) THEN |
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83 | IF(lwp) WRITE(numout,*) |
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84 | IF(lwp) WRITE(numout,*) 'dyn_zdf_imp_tan : vertical momentum diffusion explicit operator' |
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85 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~~ ' |
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86 | ENDIF |
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87 | ! 0. Local constant initialization |
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88 | ! -------------------------------- |
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89 | z1_p2dt = 1._wp / p2dt ! inverse of the timestep |
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90 | |
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91 | ! 1. Apply semi-implicit bottom friction |
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92 | ! -------------------------------------- |
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93 | ! Only needed for semi-implicit bottom friction setup. The explicit |
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94 | ! bottom friction has been included in "u(v)a" which act as the R.H.S |
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95 | ! column vector of the tri-diagonal matrix equation |
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96 | ! |
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97 | |
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98 | IF( ln_bfrimp ) THEN |
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99 | !!!!!!!!!!!!!!!!!!!!!!!!!!! |
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100 | ! avm* are unactivated for the current TAM |
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101 | !!!!!!!!!!!!!!!!!!!!!!!!!!! |
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102 | !# if defined key_vectopt_loop |
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103 | !DO jj = 1, 1 |
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104 | !DO ji = jpi+2, jpij-jpi-1 ! vector opt. (forced unrolling) |
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105 | !# else |
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106 | !DO jj = 2, jpjm1 |
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107 | !DO ji = 2, jpim1 |
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108 | !# endif |
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109 | !ikbu = mbku(ji,jj) ! ocean bottom level at u- and v-points |
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110 | !ikbv = mbkv(ji,jj) ! (deepest ocean u- and v-points) |
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111 | !zavmu(ji,jj) = avmu(ji,jj,ikbu+1) |
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112 | !zavmv(ji,jj) = avmv(ji,jj,ikbv+1) |
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113 | !avmu(ji,jj,ikbu+1) = -bfrua(ji,jj) * fse3uw(ji,jj,ikbu+1) |
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114 | !avmv(ji,jj,ikbv+1) = -bfrva(ji,jj) * fse3vw(ji,jj,ikbv+1) |
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115 | !END DO |
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116 | !END DO |
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117 | |
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118 | ENDIF |
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119 | |
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120 | ! 2. Vertical diffusion on u |
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121 | ! --------------------------- |
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122 | ! Matrix and second member construction |
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123 | ! bottom boundary condition: both zwi and zws must be masked as avmu can take |
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124 | ! non zero value at the ocean bottom depending on the bottom friction used. |
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125 | DO jk = 1, jpkm1 |
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126 | DO jj = 2, jpjm1 |
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127 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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128 | zcoef = - p2dt / fse3u(ji,jj,jk) |
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129 | zwi(ji,jj,jk) = zcoef * avmu(ji,jj,jk ) / fse3uw(ji,jj,jk ) * umask(ji,jj,jk) |
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130 | zzws = zcoef * avmu(ji,jj,jk+1) / fse3uw(ji,jj,jk+1) |
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131 | zws(ji,jj,jk) = zzws * umask(ji,jj,jk+1) |
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132 | zwd(ji,jj,jk) = 1._wp - zwi(ji,jj,jk) - zzws |
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133 | END DO |
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134 | END DO |
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135 | END DO |
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136 | |
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137 | ! Surface boudary conditions |
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138 | DO jj = 2, jpjm1 |
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139 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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140 | zwi(ji,jj,1) = 0.0_wp |
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141 | zwd(ji,jj,1) = 1._wp - zws(ji,jj,1) |
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142 | END DO |
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143 | END DO |
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144 | |
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145 | ! Matrix inversion starting from the first level |
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146 | !----------------------------------------------------------------------- |
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147 | ! solve m.x = y where m is a tri diagonal matrix ( jpk*jpk ) |
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148 | ! |
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149 | ! ( zwd1 zws1 0 0 0 )( zwx1 ) ( zwy1 ) |
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150 | ! ( zwi2 zwd2 zws2 0 0 )( zwx2 ) ( zwy2 ) |
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151 | ! ( 0 zwi3 zwd3 zws3 0 )( zwx3 )=( zwy3 ) |
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152 | ! ( ... )( ... ) ( ... ) |
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153 | ! ( 0 0 0 zwik zwdk )( zwxk ) ( zwyk ) |
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154 | ! |
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155 | ! m is decomposed in the product of an upper and a lower triangular matrix |
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156 | ! The 3 diagonal terms are in 2d arrays: zwd, zws, zwi |
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157 | ! The solution (the after velocity) is in ua |
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158 | !----------------------------------------------------------------------- |
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159 | |
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160 | ! First recurrence : Dk = Dk - Lk * Uk-1 / Dk-1 (increasing k) |
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161 | DO jk = 2, jpkm1 |
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162 | DO jj = 2, jpjm1 |
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163 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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164 | zwd(ji,jj,jk) = zwd(ji,jj,jk) - zwi(ji,jj,jk) * zws(ji,jj,jk-1) / zwd(ji,jj,jk-1) |
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165 | END DO |
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166 | END DO |
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167 | END DO |
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168 | |
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169 | ! second recurrence: SOLk = RHSk - Lk / Dk-1 Lk-1 |
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170 | DO jj = 2, jpjm1 |
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171 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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172 | ua_tl(ji,jj,1) = ub_tl(ji,jj,1) & |
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173 | + p2dt * ua_tl(ji,jj,1) |
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174 | END DO |
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175 | END DO |
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176 | DO jk = 2, jpkm1 |
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177 | DO jj = 2, jpjm1 |
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178 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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179 | zrhstl = ub_tl(ji,jj,jk) + p2dt * ua_tl(ji,jj,jk) ! zrhs=right hand side |
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180 | ua_tl(ji,jj,jk) = zrhstl - zwi(ji,jj,jk) / zwd(ji,jj,jk-1) * ua_tl(ji,jj,jk-1) |
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181 | END DO |
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182 | END DO |
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183 | END DO |
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184 | |
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185 | ! thrid recurrence : SOLk = ( Lk - Uk * Ek+1 ) / Dk |
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186 | DO jj = 2, jpjm1 |
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187 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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188 | ua_tl(ji,jj,jpkm1) = ua_tl(ji,jj,jpkm1) / zwd(ji,jj,jpkm1) |
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189 | END DO |
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190 | END DO |
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191 | DO jk = jpk-2, 1, -1 |
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192 | DO jj = 2, jpjm1 |
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193 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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194 | ua_tl(ji,jj,jk) = ( ua_tl(ji,jj,jk) - zws(ji,jj,jk) * ua_tl(ji,jj,jk+1) ) / zwd(ji,jj,jk) |
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195 | END DO |
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196 | END DO |
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197 | END DO |
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198 | |
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199 | ! Normalization to obtain the general momentum trend ua |
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200 | DO jk = 1, jpkm1 |
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201 | DO jj = 2, jpjm1 |
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202 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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203 | ua_tl(ji,jj,jk) = ( ua_tl(ji,jj,jk) - ub_tl(ji,jj,jk) ) * z1_p2dt |
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204 | END DO |
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205 | END DO |
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206 | END DO |
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207 | |
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208 | |
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209 | ! 2. Vertical diffusion on v |
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210 | ! --------------------------- |
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211 | ! Matrix and second member construction |
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212 | ! bottom boundary condition: both zwi and zws must be masked as avmv can take |
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213 | ! non zero value at the ocean bottom depending on the bottom friction |
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214 | ! used but the bottom velocities have already been updated with the bottom |
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215 | ! friction velocity in dyn_bfr using values from the previous timestep. There |
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216 | ! is no need to include these in the implicit calculation. |
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217 | DO jk = 1, jpkm1 |
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218 | DO jj = 2, jpjm1 |
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219 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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220 | zcoef = -p2dt / fse3v(ji,jj,jk) |
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221 | zwi(ji,jj,jk) = zcoef * avmv(ji,jj,jk ) / fse3vw(ji,jj,jk ) * vmask(ji,jj,jk) |
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222 | zzws = zcoef * avmv(ji,jj,jk+1) / fse3vw(ji,jj,jk+1) |
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223 | zws(ji,jj,jk) = zzws * vmask(ji,jj,jk+1) |
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224 | zwd(ji,jj,jk) = 1._wp - zwi(ji,jj,jk) - zzws |
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225 | END DO |
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226 | END DO |
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227 | END DO |
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228 | |
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229 | ! Surface boudary conditions |
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230 | DO jj = 2, jpjm1 |
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231 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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232 | zwi(ji,jj,1) = 0._wp |
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233 | zwd(ji,jj,1) = 1._wp - zws(ji,jj,1) |
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234 | END DO |
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235 | END DO |
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236 | |
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237 | ! Matrix inversion |
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238 | !----------------------------------------------------------------------- |
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239 | ! solve m.x = y where m is a tri diagonal matrix ( jpk*jpk ) |
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240 | ! |
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241 | ! ( zwd1 zws1 0 0 0 )( zwx1 ) ( zwy1 ) |
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242 | ! ( zwi2 zwd2 zws2 0 0 )( zwx2 ) ( zwy2 ) |
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243 | ! ( 0 zwi3 zwd3 zws3 0 )( zwx3 )=( zwy3 ) |
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244 | ! ( ... )( ... ) ( ... ) |
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245 | ! ( 0 0 0 zwik zwdk )( zwxk ) ( zwyk ) |
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246 | ! |
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247 | ! m is decomposed in the product of an upper and lower triangular |
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248 | ! matrix |
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249 | ! The 3 diagonal terms are in 2d arrays: zwd, zws, zwi |
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250 | ! The solution (after velocity) is in 2d array va |
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251 | !----------------------------------------------------------------------- |
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252 | |
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253 | ! First recurrence : Dk = Dk - Lk * Uk-1 / Dk-1 (increasing k) |
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254 | DO jk = 2, jpkm1 |
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255 | DO jj = 2, jpjm1 |
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256 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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257 | zwd(ji,jj,jk) = zwd(ji,jj,jk) - zwi(ji,jj,jk) * zws(ji,jj,jk-1) / zwd(ji,jj,jk-1) |
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258 | END DO |
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259 | END DO |
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260 | END DO |
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261 | |
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262 | ! second recurrence: SOLk = RHSk - Lk / Dk-1 Lk-1 |
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263 | DO jj = 2, jpjm1 |
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264 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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265 | va_tl(ji,jj,1) = vb_tl(ji,jj,1) & |
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266 | + p2dt * va_tl(ji,jj,1) |
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267 | END DO |
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268 | END DO |
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269 | DO jk = 2, jpkm1 |
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270 | DO jj = 2, jpjm1 |
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271 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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272 | zrhstl = vb_tl(ji,jj,jk) + p2dt * va_tl(ji,jj,jk) ! zrhs=right hand side |
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273 | va_tl(ji,jj,jk) = zrhstl - zwi(ji,jj,jk) / zwd(ji,jj,jk-1) * va_tl(ji,jj,jk-1) |
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274 | END DO |
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275 | END DO |
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276 | END DO |
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277 | |
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278 | ! thrid recurrence : SOLk = ( Lk - Uk * SOLk+1 ) / Dk |
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279 | DO jj = 2, jpjm1 |
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280 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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281 | va_tl(ji,jj,jpkm1) = va_tl(ji,jj,jpkm1) / zwd(ji,jj,jpkm1) |
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282 | END DO |
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283 | END DO |
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284 | DO jk = jpk-2, 1, -1 |
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285 | DO jj = 2, jpjm1 |
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286 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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287 | va_tl(ji,jj,jk) = ( va_tl(ji,jj,jk) - zws(ji,jj,jk) * va_tl(ji,jj,jk+1) ) / zwd(ji,jj,jk) |
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288 | END DO |
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289 | END DO |
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290 | END DO |
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291 | |
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292 | ! Normalization to obtain the general momentum trend va |
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293 | DO jk = 1, jpkm1 |
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294 | DO jj = 2, jpjm1 |
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295 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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296 | va_tl(ji,jj,jk) = ( va_tl(ji,jj,jk) - vb_tl(ji,jj,jk) ) * z1_p2dt |
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297 | END DO |
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298 | END DO |
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299 | END DO |
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300 | |
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301 | !! restore bottom layer avmu(v) |
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302 | IF( ln_bfrimp ) THEN |
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303 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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304 | ! avm* are unactivated in the current TAM |
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305 | !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! |
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306 | !# if defined key_vectopt_loop |
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307 | !DO jj = 1, 1 |
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308 | !DO ji = jpi+2, jpij-jpi-1 ! vector opt. (forced unrolling) |
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309 | !# else |
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310 | !DO jj = 2, jpjm1 |
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311 | !DO ji = 2, jpim1 |
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312 | !# endif |
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313 | !ikbu = mbku(ji,jj) ! ocean bottom level at u- and v-points |
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314 | !ikbv = mbkv(ji,jj) ! (deepest ocean u- and v-points) |
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315 | !avmu(ji,jj,ikbu+1) = zavmu(ji,jj) |
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316 | !avmv(ji,jj,ikbv+1) = zavmv(ji,jj) |
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317 | !END DO |
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318 | !END DO |
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319 | ENDIF |
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320 | ! |
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321 | CALL wrk_dealloc( jpi,jpj,jpk, zwi, zwd, zws) |
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322 | ! |
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323 | IF( nn_timing == 1 ) CALL timing_stop('dyn_zdf_imp_tan') |
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324 | ! |
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325 | END SUBROUTINE dyn_zdf_imp_tan |
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326 | SUBROUTINE dyn_zdf_imp_adj( kt, p2dt ) |
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327 | !!---------------------------------------------------------------------- |
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328 | !! *** ROUTINE dyn_zdf_imp_adj *** |
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329 | !! |
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330 | !! ** Purpose of the direct routine: |
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331 | !! Compute the trend due to the vert. momentum diffusion |
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332 | !! and the surface forcing, and add it to the general trend of |
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333 | !! the momentum equations. |
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334 | !! |
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335 | !! ** Method of the direct routine: |
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336 | !! The vertical momentum mixing trend is given by : |
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337 | !! dz( avmu dz(u) ) = 1/e3u dk+1( avmu/e3uw dk(ua) ) |
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338 | !! backward time stepping |
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339 | !! Surface boundary conditions: wind stress input |
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340 | !! Bottom boundary conditions : bottom stress (cf zdfbfr.F) |
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341 | !! Add this trend to the general trend ua : |
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342 | !! ua = ua + dz( avmu dz(u) )E |
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343 | !! |
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344 | !! ** Action : - Update (ua,va) arrays with the after vertical diffusive |
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345 | !! mixing trend. |
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346 | !!--------------------------------------------------------------------- |
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347 | !! * Modules used |
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348 | !! * Arguments |
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349 | INTEGER , INTENT( in ) :: kt ! ocean time-step index |
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350 | REAL(wp), INTENT( in ) :: p2dt ! time-step |
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351 | |
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352 | !! * Local declarations |
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353 | !! * Local declarations |
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354 | INTEGER :: ji, jj, jk ! dummy loop indices |
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355 | REAL(wp) :: z1_p2dt, z2dtf, zcoef, zzws, zrhsad ! temporary scalars |
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356 | REAL(wp), POINTER, DIMENSION(:,:,:) :: zwi, zws, zwd! temporary workspace arrays |
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357 | !!---------------------------------------------------------------------- |
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358 | ! |
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359 | IF( nn_timing == 1 ) CALL timing_start('dyn_zdf_imp_adj') |
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360 | ! |
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361 | CALL wrk_alloc( jpi,jpj,jpk, zwi, zwd, zws ) |
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362 | ! |
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363 | IF( kt == nitend ) THEN |
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364 | IF(lwp) WRITE(numout,*) |
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365 | IF(lwp) WRITE(numout,*) 'dyn_zdf_imp_adj : vertical momentum diffusion explicit operator' |
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366 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~~~~ ' |
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367 | ENDIF |
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368 | ! 0. Local constant initialization |
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369 | ! -------------------------------- |
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370 | z1_p2dt = 1._wp / p2dt ! inverse of the timestep |
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371 | zrhsad = 0.0_wp |
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372 | ! |
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373 | !! restore bottom layer avmu(v) |
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374 | IF( ln_bfrimp ) THEN |
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375 | !# if defined key_vectopt_loop |
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376 | !DO jj = 1, 1 |
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377 | !DO ji = jpi+2, jpij-jpi-1 ! vector opt. (forced unrolling) |
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378 | !# else |
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379 | !DO jj = 2, jpjm1 |
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380 | !DO ji = 2, jpim1 |
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381 | !# endif |
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382 | !ikbu = mbku(ji,jj) ! ocean bottom level at u- and v-points |
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383 | !ikbv = mbkv(ji,jj) ! (deepest ocean u- and v-points) |
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384 | !avmu(ji,jj,ikbu+1) = zavmu(ji,jj) |
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385 | !avmv(ji,jj,ikbv+1) = zavmv(ji,jj) |
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386 | !END DO |
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387 | !END DO |
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388 | ENDIF |
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389 | ! |
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390 | ! 2. Vertical diffusion on v |
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391 | ! --------------------------- |
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392 | ! Matrix and second member construction |
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393 | ! bottom boundary condition: both zwi and zws must be masked as avmv can take |
---|
394 | ! non zero value at the ocean bottom depending on the bottom friction |
---|
395 | ! used but the bottom velocities have already been updated with the bottom |
---|
396 | ! friction velocity in dyn_bfr using values from the previous timestep. There |
---|
397 | ! is no need to include these in the implicit calculation. |
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398 | DO jk = 1, jpkm1 |
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399 | DO jj = 2, jpjm1 |
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400 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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401 | zcoef = -p2dt / fse3v(ji,jj,jk) |
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402 | zwi(ji,jj,jk) = zcoef * avmv(ji,jj,jk ) / fse3vw(ji,jj,jk ) * vmask(ji,jj,jk) |
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403 | zzws = zcoef * avmv(ji,jj,jk+1) / fse3vw(ji,jj,jk+1) |
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404 | zws(ji,jj,jk) = zzws * vmask(ji,jj,jk+1) |
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405 | zwd(ji,jj,jk) = 1._wp - zwi(ji,jj,jk) - zzws |
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406 | END DO |
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407 | END DO |
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408 | END DO |
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409 | |
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410 | ! Surface boudary conditions |
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411 | DO jj = 2, jpjm1 |
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412 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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413 | zwi(ji,jj,1) = 0._wp |
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414 | zwd(ji,jj,1) = 1._wp - zws(ji,jj,1) |
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415 | END DO |
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416 | END DO |
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417 | |
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418 | ! Matrix inversion |
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419 | !----------------------------------------------------------------------- |
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420 | ! solve m.x = y where m is a tri diagonal matrix ( jpk*jpk ) |
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421 | ! |
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422 | ! ( zwd1 zws1 0 0 0 )( zwx1 ) ( zwy1 ) |
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423 | ! ( zwi2 zwd2 zws2 0 0 )( zwx2 ) ( zwy2 ) |
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424 | ! ( 0 zwi3 zwd3 zws3 0 )( zwx3 )=( zwy3 ) |
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425 | ! ( ... )( ... ) ( ... ) |
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426 | ! ( 0 0 0 zwik zwdk )( zwxk ) ( zwyk ) |
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427 | ! |
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428 | ! m is decomposed in the product of an upper and lower triangular |
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429 | ! matrix |
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430 | ! The 3 diagonal terms are in 2d arrays: zwd, zws, zwi |
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431 | ! The solution (after velocity) is in 2d array va |
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432 | !----------------------------------------------------------------------- |
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433 | |
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434 | ! First recurrence : Dk = Dk - Lk * Uk-1 / Dk-1 (increasing k) |
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435 | DO jk = 2, jpkm1 |
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436 | DO jj = 2, jpjm1 |
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437 | DO ji = fs_2, fs_jpim1 ! vector opt. |
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438 | zwd(ji,jj,jk) = zwd(ji,jj,jk) - zwi(ji,jj,jk) * zws(ji,jj,jk-1) / zwd(ji,jj,jk-1) |
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439 | END DO |
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440 | END DO |
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441 | END DO |
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442 | |
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443 | ! Normalization to obtain the general momentum trend va |
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444 | DO jk = jpkm1, 1, -1 |
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445 | DO jj = jpjm1, 2, -1 |
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446 | DO ji = fs_jpim1, fs_2, -1 ! vector opt. |
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447 | vb_ad(ji,jj,jk) = vb_ad(ji,jj,jk) - va_ad(ji,jj,jk) / p2dt |
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448 | va_ad(ji,jj,jk) = va_ad(ji,jj,jk) / p2dt |
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449 | END DO |
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450 | END DO |
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451 | END DO |
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452 | ! thrid recurrence : SOLk = ( Lk - Uk * SOLk+1 ) / Dk |
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453 | DO jk = 1, jpk-2 |
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454 | DO jj = jpjm1, 2, -1 |
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455 | DO ji = fs_jpim1, fs_2, -1 ! vector opt. |
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456 | va_ad(ji,jj,jk+1) = va_ad(ji,jj,jk+1) - zws(ji,jj,jk) * va_ad(ji,jj,jk) / zwd(ji,jj,jk) |
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457 | va_ad(ji,jj,jk ) = va_ad(ji,jj,jk ) / zwd(ji,jj,jk) |
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458 | END DO |
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459 | END DO |
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460 | END DO |
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461 | DO jj = jpjm1, 2, -1 |
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462 | DO ji = fs_jpim1, fs_2, -1 ! vector opt. |
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463 | va_ad(ji,jj,jpkm1) = va_ad(ji,jj,jpkm1) / zwd(ji,jj,jpkm1) |
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464 | END DO |
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465 | END DO |
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466 | ! second recurrence: SOLk = RHSk - Lk / Dk-1 Lk-1 |
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467 | DO jk = jpkm1, 2, -1 |
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468 | DO jj = jpjm1, 2, -1 |
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469 | DO ji = fs_jpim1, fs_2, -1 ! vector opt. |
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470 | zrhsad = zrhsad + va_ad(ji,jj,jk) |
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471 | va_ad(ji,jj,jk-1) = va_ad(ji,jj,jk-1) - zwi(ji,jj,jk) / zwd(ji,jj,jk-1) * va_ad(ji,jj,jk) |
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472 | va_ad(ji,jj,jk ) = 0.0_wp |
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473 | vb_ad(ji,jj,jk) = vb_ad(ji,jj,jk) + zrhsad |
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474 | va_ad(ji,jj,jk) = va_ad(ji,jj,jk) + p2dt * zrhsad |
---|
475 | zrhsad = 0.0_wp |
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476 | END DO |
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477 | END DO |
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478 | END DO |
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479 | DO jj = jpjm1, 2, -1 |
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480 | DO ji = fs_jpim1, fs_2, -1 ! vector opt. |
---|
481 | vb_ad(ji,jj,1) = vb_ad(ji,jj,1) + va_ad(ji,jj,1) |
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482 | va_ad(ji,jj,1) = va_ad(ji,jj,1) * p2dt |
---|
483 | END DO |
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484 | END DO |
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485 | |
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486 | ! 1. Vertical diffusion on u |
---|
487 | ! --------------------------- |
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488 | ! Matrix and second member construction |
---|
489 | ! bottom boundary condition: both zwi and zws must be masked as avmu can take |
---|
490 | ! non zero value at the ocean bottom depending on the bottom friction |
---|
491 | ! used but the bottom velocities have already been updated with the bottom |
---|
492 | ! friction velocity in dyn_bfr using values from the previous timestep. There |
---|
493 | ! is no need to include these in the implicit calculation. |
---|
494 | DO jk = 1, jpkm1 |
---|
495 | DO jj = 2, jpjm1 |
---|
496 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
497 | zcoef = - p2dt / fse3u(ji,jj,jk) |
---|
498 | zwi(ji,jj,jk) = zcoef * avmu(ji,jj,jk ) / fse3uw(ji,jj,jk ) * umask(ji,jj,jk) |
---|
499 | zzws = zcoef * avmu(ji,jj,jk+1) / fse3uw(ji,jj,jk+1) |
---|
500 | zws(ji,jj,jk) = zzws * umask(ji,jj,jk+1) |
---|
501 | zwd(ji,jj,jk) = 1._wp - zwi(ji,jj,jk) - zzws |
---|
502 | END DO |
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503 | END DO |
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504 | END DO |
---|
505 | |
---|
506 | ! Surface boudary conditions |
---|
507 | DO jj = 2, jpjm1 |
---|
508 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
509 | zwi(ji,jj,1) = 0._wp |
---|
510 | zwd(ji,jj,1) = 1._wp - zws(ji,jj,1) |
---|
511 | END DO |
---|
512 | END DO |
---|
513 | |
---|
514 | ! Matrix inversion starting from the first level |
---|
515 | !----------------------------------------------------------------------- |
---|
516 | ! solve m.x = y where m is a tri diagonal matrix ( jpk*jpk ) |
---|
517 | ! |
---|
518 | ! ( zwd1 zws1 0 0 0 )( zwx1 ) ( zwy1 ) |
---|
519 | ! ( zwi2 zwd2 zws2 0 0 )( zwx2 ) ( zwy2 ) |
---|
520 | ! ( 0 zwi3 zwd3 zws3 0 )( zwx3 )=( zwy3 ) |
---|
521 | ! ( ... )( ... ) ( ... ) |
---|
522 | ! ( 0 0 0 zwik zwdk )( zwxk ) ( zwyk ) |
---|
523 | ! |
---|
524 | ! m is decomposed in the product of an upper and a lower triangular matrix |
---|
525 | ! The 3 diagonal terms are in 2d arrays: zwd, zws, zwi |
---|
526 | ! The solution (the after velocity) is in ua |
---|
527 | !----------------------------------------------------------------------- |
---|
528 | |
---|
529 | ! First recurrence : Dk = Dk - Lk * Uk-1 / Dk-1 (increasing k) |
---|
530 | DO jk = 2, jpkm1 |
---|
531 | DO jj = 2, jpjm1 |
---|
532 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
533 | zwd(ji,jj,jk) = zwd(ji,jj,jk) - zwi(ji,jj,jk) * zws(ji,jj,jk-1) / zwd(ji,jj,jk-1) |
---|
534 | END DO |
---|
535 | END DO |
---|
536 | END DO |
---|
537 | ! Normalization to obtain the general momentum trend ua |
---|
538 | DO jk = jpkm1, 1, -1 |
---|
539 | DO jj = jpjm1, 2, -1 |
---|
540 | DO ji = fs_jpim1, fs_2, -1 ! vector opt. |
---|
541 | ub_ad(ji,jj,jk) = ub_ad(ji,jj,jk) - ua_ad(ji,jj,jk) / p2dt |
---|
542 | ua_ad(ji,jj,jk) = ua_ad(ji,jj,jk) / p2dt |
---|
543 | END DO |
---|
544 | END DO |
---|
545 | END DO |
---|
546 | ! thrid recurrence : SOLk = ( Lk - Uk * Ek+1 ) / Dk |
---|
547 | DO jk = 1, jpk-2 |
---|
548 | DO jj = jpjm1, 2, -1 |
---|
549 | DO ji = fs_jpim1, fs_2, -1 ! vector opt. |
---|
550 | ua_ad(ji,jj,jk+1) = ua_ad(ji,jj,jk+1) - ua_ad(ji,jj,jk) * zws(ji,jj,jk) / zwd(ji,jj,jk) |
---|
551 | ua_ad(ji,jj,jk) = ua_ad(ji,jj,jk) / zwd(ji,jj,jk) |
---|
552 | END DO |
---|
553 | END DO |
---|
554 | END DO |
---|
555 | DO jj = jpjm1, 2, -1 |
---|
556 | DO ji = fs_jpim1, fs_2, -1 |
---|
557 | ua_ad(ji,jj,jpkm1) = ua_ad(ji,jj,jpkm1) / zwd(ji,jj,jpkm1) |
---|
558 | END DO |
---|
559 | END DO |
---|
560 | DO jk = jpkm1, 2, -1 |
---|
561 | DO jj = jpjm1, 2, -1 |
---|
562 | DO ji = fs_jpim1, fs_2, -1 ! vector opt. |
---|
563 | zrhsad = zrhsad + ua_ad(ji,jj,jk) |
---|
564 | ua_ad(ji,jj,jk-1) = ua_ad(ji,jj,jk-1) - zwi(ji,jj,jk) / zwd(ji,jj,jk-1) * ua_ad(ji,jj,jk) |
---|
565 | ua_ad(ji,jj,jk) = 0.0_wp |
---|
566 | ub_ad(ji,jj,jk) = ub_ad(ji,jj,jk) + zrhsad |
---|
567 | ua_ad(ji,jj,jk) = ua_ad(ji,jj,jk) + zrhsad * p2dt |
---|
568 | zrhsad = 0.0_wp |
---|
569 | END DO |
---|
570 | END DO |
---|
571 | END DO |
---|
572 | ! second recurrence: SOLk = RHSk - Lk / Dk-1 Lk-1 |
---|
573 | DO jj = 2, jpjm1 |
---|
574 | DO ji = fs_2, fs_jpim1 ! vector opt. |
---|
575 | ub_ad(ji,jj,1) = ub_ad(ji,jj,1) + ua_ad(ji,jj,1) |
---|
576 | ua_ad(ji,jj,1) = p2dt * ua_ad(ji,jj,1) |
---|
577 | END DO |
---|
578 | END DO |
---|
579 | ! |
---|
580 | ! 1. Apply semi-implicit bottom friction |
---|
581 | ! -------------------------------------- |
---|
582 | ! Only needed for semi-implicit bottom friction setup. The explicit |
---|
583 | ! bottom friction has been included in "u(v)a" which act as the R.H.S |
---|
584 | ! column vector of the tri-diagonal matrix equation |
---|
585 | ! |
---|
586 | IF( ln_bfrimp ) THEN |
---|
587 | !# if defined key_vectopt_loop |
---|
588 | !DO jj = 1, 1 |
---|
589 | !DO ji = jpi+2, jpij-jpi-1 ! vector opt. (forced unrolling) |
---|
590 | !# else |
---|
591 | !DO jj = 2, jpjm1 |
---|
592 | !DO ji = 2, jpim1 |
---|
593 | !# endif |
---|
594 | !ikbu = mbku(ji,jj) ! ocean bottom level at u- and v-points |
---|
595 | !ikbv = mbkv(ji,jj) ! (deepest ocean u- and v-points) |
---|
596 | !zavmu(ji,jj) = avmu(ji,jj,ikbu+1) |
---|
597 | !zavmv(ji,jj) = avmv(ji,jj,ikbv+1) |
---|
598 | !avmu(ji,jj,ikbu+1) = -bfrua(ji,jj) * fse3uw(ji,jj,ikbu+1) |
---|
599 | !avmv(ji,jj,ikbv+1) = -bfrva(ji,jj) * fse3vw(ji,jj,ikbv+1) |
---|
600 | !END DO |
---|
601 | !END DO |
---|
602 | ENDIF |
---|
603 | ! |
---|
604 | CALL wrk_dealloc( jpi,jpj,jpk, zwi, zwd, zws) |
---|
605 | ! |
---|
606 | IF( nn_timing == 1 ) CALL timing_stop('dyn_zdf_imp_adj') |
---|
607 | ! |
---|
608 | END SUBROUTINE dyn_zdf_imp_adj |
---|
609 | #endif |
---|
610 | !!============================================================================== |
---|
611 | END MODULE dynzdf_imp_tam |
---|