1 | MODULE sbcssm |
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2 | !!====================================================================== |
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3 | !! *** MODULE sbcssm *** |
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4 | !! Surface module : provide time-mean ocean surface variables |
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5 | !!====================================================================== |
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6 | !! History : 9.0 ! 2006-07 (G. Madec) Original code |
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7 | !! 3.3 ! 2010-10 (C. Bricaud, G. Madec) add the Patm forcing for sea-ice |
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8 | !! 3.7 ! 2015-11 (G. Madec) non linear free surface by default: e3t_m always computed |
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9 | !!---------------------------------------------------------------------- |
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10 | |
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11 | !!---------------------------------------------------------------------- |
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12 | !! sbc_ssm : calculate sea surface mean currents, temperature, |
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13 | !! and salinity over nn_fsbc time-step |
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14 | !!---------------------------------------------------------------------- |
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15 | USE oce ! ocean dynamics and tracers |
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16 | USE dom_oce ! ocean space and time domain |
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17 | USE sbc_oce ! surface boundary condition: ocean fields |
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18 | USE sbcapr ! surface boundary condition: atmospheric pressure |
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19 | USE eosbn2 ! equation of state and related derivatives |
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20 | ! |
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21 | USE in_out_manager ! I/O manager |
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22 | USE prtctl ! Print control |
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23 | USE iom ! IOM library |
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24 | |
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25 | IMPLICIT NONE |
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26 | PRIVATE |
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27 | |
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28 | PUBLIC sbc_ssm ! routine called by step.F90 |
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29 | PUBLIC sbc_ssm_init ! routine called by sbcmod.F90 |
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30 | |
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31 | LOGICAL, SAVE :: l_ssm_mean = .FALSE. ! keep track of whether means have been read from restart file |
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32 | |
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33 | !!---------------------------------------------------------------------- |
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34 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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35 | !! $Id$ |
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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 sbc_ssm( kt ) |
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41 | !!--------------------------------------------------------------------- |
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42 | !! *** ROUTINE sbc_oce *** |
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43 | !! |
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44 | !! ** Purpose : provide ocean surface variable to sea-surface boundary |
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45 | !! condition computation |
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46 | !! |
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47 | !! ** Method : compute mean surface velocity (2 components at U and |
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48 | !! V-points) [m/s], temperature [Celsius] and salinity [psu] over |
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49 | !! the periode (kt - nn_fsbc) to kt |
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50 | !! Note that the inverse barometer ssh (i.e. ssh associated with Patm) |
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51 | !! is add to ssh_m when ln_apr_dyn = T. Required for sea-ice dynamics. |
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52 | !!--------------------------------------------------------------------- |
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53 | INTEGER, INTENT(in) :: kt ! ocean time step |
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54 | ! |
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55 | INTEGER :: ji, jj ! loop index |
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56 | REAL(wp) :: zcoef, zf_sbc ! local scalar |
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57 | REAL(wp), DIMENSION(jpi,jpj,jpts) :: zts |
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58 | !!--------------------------------------------------------------------- |
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59 | ! |
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60 | ! !* surface T-, U-, V- ocean level variables (T, S, depth, velocity) |
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61 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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62 | DO jj = 1, jpj |
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63 | DO ji = 1, jpi |
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64 | zts(ji,jj,jp_tem) = tsn(ji,jj,mikt(ji,jj),jp_tem) |
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65 | zts(ji,jj,jp_sal) = tsn(ji,jj,mikt(ji,jj),jp_sal) |
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66 | END DO |
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67 | END DO |
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68 | ! |
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69 | IF( nn_fsbc == 1 ) THEN ! Instantaneous surface fields ! |
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70 | ! ! ---------------------------------------- ! |
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71 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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72 | DO jj = 1, jpj |
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73 | DO ji = 1, jpi |
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74 | ssu_m(ji,jj) = ub(ji,jj,1) |
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75 | ssv_m(ji,jj) = vb(ji,jj,1) |
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76 | END DO |
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77 | END DO |
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78 | IF( l_useCT ) THEN |
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79 | sst_m(:,:) = eos_pt_from_ct( zts(:,:,jp_tem), zts(:,:,jp_sal) ) |
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80 | ELSE |
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81 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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82 | DO jj = 1, jpj |
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83 | DO ji = 1, jpi |
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84 | sst_m(ji,jj) = zts(ji,jj,jp_tem) |
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85 | END DO |
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86 | END DO |
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87 | ENDIF |
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88 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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89 | DO jj = 1, jpj |
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90 | DO ji = 1, jpi |
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91 | sss_m(ji,jj) = zts(ji,jj,jp_sal) |
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92 | END DO |
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93 | END DO |
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94 | ! ! removed inverse barometer ssh when Patm forcing is used (for sea-ice dynamics) |
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95 | IF( ln_apr_dyn ) THEN |
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96 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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97 | DO jj = 1, jpj |
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98 | DO ji = 1, jpi |
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99 | ssh_m(ji,jj) = sshn(ji,jj) - 0.5 * ( ssh_ib(ji,jj) + ssh_ibb(ji,jj) ) |
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100 | END DO |
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101 | END DO |
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102 | ELSE |
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103 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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104 | DO jj = 1, jpj |
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105 | DO ji = 1, jpi |
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106 | ssh_m(ji,jj) = sshn(ji,jj) |
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107 | END DO |
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108 | END DO |
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109 | ENDIF |
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110 | ! |
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111 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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112 | DO jj = 1, jpj |
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113 | DO ji = 1, jpi |
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114 | e3t_m(ji,jj) = e3t_n(ji,jj,1) |
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115 | ! |
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116 | frq_m(ji,jj) = fraqsr_1lev(ji,jj) |
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117 | END DO |
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118 | END DO |
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119 | ! |
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120 | ELSE |
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121 | ! ! ----------------------------------------------- ! |
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122 | IF( kt == nit000 .AND. .NOT. l_ssm_mean ) THEN ! Initialisation: 1st time-step, no input means ! |
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123 | ! ! ----------------------------------------------- ! |
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124 | IF(lwp) WRITE(numout,*) |
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125 | IF(lwp) WRITE(numout,*) 'sbc_ssm : mean fields initialised to instantaneous values' |
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126 | IF(lwp) WRITE(numout,*) '~~~~~~~ ' |
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127 | zcoef = REAL( nn_fsbc - 1, wp ) |
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128 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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129 | DO jj = 1, jpj |
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130 | DO ji = 1, jpi |
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131 | ssu_m(ji,jj) = zcoef * ub(ji,jj,1) |
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132 | ssv_m(ji,jj) = zcoef * vb(ji,jj,1) |
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133 | END DO |
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134 | END DO |
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135 | IF( l_useCT ) THEN |
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136 | sst_m(:,:) = zcoef * eos_pt_from_ct( zts(:,:,jp_tem), zts(:,:,jp_sal) ) |
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137 | ELSE |
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138 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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139 | DO jj = 1, jpj |
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140 | DO ji = 1, jpi |
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141 | sst_m(ji,jj) = zcoef * zts(ji,jj,jp_tem) |
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142 | END DO |
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143 | END DO |
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144 | ENDIF |
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145 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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146 | DO jj = 1, jpj |
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147 | DO ji = 1, jpi |
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148 | sss_m(ji,jj) = zcoef * zts(ji,jj,jp_sal) |
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149 | END DO |
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150 | END DO |
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151 | ! ! removed inverse barometer ssh when Patm forcing is used (for sea-ice dynamics) |
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152 | IF( ln_apr_dyn ) THEN |
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153 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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154 | DO jj = 1, jpj |
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155 | DO ji = 1, jpi |
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156 | ssh_m(ji,jj) = zcoef * ( sshn(ji,jj) - 0.5 * ( ssh_ib(ji,jj) + ssh_ibb(ji,jj) ) ) |
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157 | END DO |
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158 | END DO |
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159 | ELSE |
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160 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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161 | DO jj = 1, jpj |
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162 | DO ji = 1, jpi |
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163 | ssh_m(ji,jj) = zcoef * sshn(ji,jj) |
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164 | END DO |
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165 | END DO |
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166 | ENDIF |
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167 | ! |
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168 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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169 | DO jj = 1, jpj |
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170 | DO ji = 1, jpi |
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171 | e3t_m(ji,jj) = zcoef * e3t_n(ji,jj,1) |
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172 | ! |
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173 | frq_m(ji,jj) = zcoef * fraqsr_1lev(ji,jj) |
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174 | END DO |
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175 | END DO |
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176 | ! ! ---------------------------------------- ! |
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177 | ELSEIF( MOD( kt - 2 , nn_fsbc ) == 0 ) THEN ! Initialisation: New mean computation ! |
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178 | ! ! ---------------------------------------- ! |
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179 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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180 | DO jj = 1, jpj |
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181 | DO ji = 1, jpi |
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182 | ssu_m(ji,jj) = 0._wp ! reset to zero ocean mean sbc fields |
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183 | ssv_m(ji,jj) = 0._wp |
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184 | sst_m(ji,jj) = 0._wp |
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185 | sss_m(ji,jj) = 0._wp |
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186 | ssh_m(ji,jj) = 0._wp |
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187 | e3t_m(ji,jj) = 0._wp |
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188 | frq_m(ji,jj) = 0._wp |
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189 | END DO |
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190 | END DO |
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191 | ENDIF |
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192 | ! ! ---------------------------------------- ! |
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193 | ! ! Cumulate at each time step ! |
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194 | ! ! ---------------------------------------- ! |
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195 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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196 | DO jj = 1, jpj |
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197 | DO ji = 1, jpi |
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198 | ssu_m(ji,jj) = ssu_m(ji,jj) + ub(ji,jj,1) |
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199 | ssv_m(ji,jj) = ssv_m(ji,jj) + vb(ji,jj,1) |
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200 | END DO |
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201 | END DO |
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202 | IF( l_useCT ) THEN |
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203 | sst_m(:,:) = sst_m(:,:) + eos_pt_from_ct( zts(:,:,jp_tem), zts(:,:,jp_sal) ) |
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204 | ELSE |
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205 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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206 | DO jj = 1, jpj |
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207 | DO ji = 1, jpi |
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208 | sst_m(ji,jj) = sst_m(ji,jj) + zts(ji,jj,jp_tem) |
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209 | END DO |
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210 | END DO |
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211 | ENDIF |
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212 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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213 | DO jj = 1, jpj |
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214 | DO ji = 1, jpi |
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215 | sss_m(ji,jj) = sss_m(ji,jj) + zts(ji,jj,jp_sal) |
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216 | END DO |
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217 | END DO |
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218 | ! ! removed inverse barometer ssh when Patm forcing is used (for sea-ice dynamics) |
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219 | IF( ln_apr_dyn ) THEN |
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220 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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221 | DO jj = 1, jpj |
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222 | DO ji = 1, jpi |
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223 | ssh_m(ji,jj) = ssh_m(ji,jj) + sshn(ji,jj) - 0.5 * ( ssh_ib(ji,jj) + ssh_ibb(ji,jj) ) |
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224 | END DO |
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225 | END DO |
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226 | ELSE |
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227 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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228 | DO jj = 1, jpj |
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229 | DO ji = 1, jpi |
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230 | ssh_m(ji,jj) = ssh_m(ji,jj) + sshn(ji,jj) |
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231 | END DO |
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232 | END DO |
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233 | ENDIF |
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234 | ! |
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235 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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236 | DO jj = 1, jpj |
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237 | DO ji = 1, jpi |
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238 | e3t_m(ji,jj) = e3t_m(ji,jj) + e3t_n(ji,jj,1) |
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239 | ! |
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240 | frq_m(ji,jj) = frq_m(ji,jj) + fraqsr_1lev(ji,jj) |
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241 | END DO |
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242 | END DO |
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243 | |
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244 | ! ! ---------------------------------------- ! |
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245 | IF( MOD( kt - 1 , nn_fsbc ) == 0 ) THEN ! Mean value at each nn_fsbc time-step ! |
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246 | ! ! ---------------------------------------- ! |
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247 | zcoef = 1. / REAL( nn_fsbc, wp ) |
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248 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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249 | DO jj = 1, jpj |
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250 | DO ji = 1, jpi |
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251 | sst_m(ji,jj) = sst_m(ji,jj) * zcoef ! mean SST [Celsius] |
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252 | sss_m(ji,jj) = sss_m(ji,jj) * zcoef ! mean SSS [psu] |
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253 | ssu_m(ji,jj) = ssu_m(ji,jj) * zcoef ! mean suface current [m/s] |
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254 | ssv_m(ji,jj) = ssv_m(ji,jj) * zcoef ! |
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255 | ssh_m(ji,jj) = ssh_m(ji,jj) * zcoef ! mean SSH [m] |
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256 | e3t_m(ji,jj) = e3t_m(ji,jj) * zcoef ! mean vertical scale factor [m] |
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257 | frq_m(ji,jj) = frq_m(ji,jj) * zcoef ! mean fraction of solar net radiation absorbed in the 1st T level [-] |
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258 | END DO |
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259 | END DO |
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260 | ! |
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261 | ENDIF |
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262 | ! ! ---------------------------------------- ! |
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263 | IF( lrst_oce ) THEN ! Write in the ocean restart file ! |
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264 | ! ! ---------------------------------------- ! |
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265 | IF(lwp) WRITE(numout,*) |
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266 | IF(lwp) WRITE(numout,*) 'sbc_ssm : sea surface mean fields written in ocean restart file ', & |
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267 | & 'at it= ', kt,' date= ', ndastp |
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268 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
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269 | zf_sbc = REAL( nn_fsbc, wp ) |
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270 | CALL iom_rstput( kt, nitrst, numrow, 'nn_fsbc', zf_sbc ) ! sbc frequency |
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271 | CALL iom_rstput( kt, nitrst, numrow, 'ssu_m' , ssu_m ) ! sea surface mean fields |
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272 | CALL iom_rstput( kt, nitrst, numrow, 'ssv_m' , ssv_m ) |
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273 | CALL iom_rstput( kt, nitrst, numrow, 'sst_m' , sst_m ) |
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274 | CALL iom_rstput( kt, nitrst, numrow, 'sss_m' , sss_m ) |
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275 | CALL iom_rstput( kt, nitrst, numrow, 'ssh_m' , ssh_m ) |
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276 | CALL iom_rstput( kt, nitrst, numrow, 'e3t_m' , e3t_m ) |
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277 | CALL iom_rstput( kt, nitrst, numrow, 'frq_m' , frq_m ) |
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278 | ! |
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279 | ENDIF |
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280 | ! |
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281 | ENDIF |
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282 | ! |
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283 | IF( MOD( kt - 1 , nn_fsbc ) == 0 ) THEN ! Mean value at each nn_fsbc time-step ! |
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284 | CALL iom_put( 'ssu_m', ssu_m ) |
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285 | CALL iom_put( 'ssv_m', ssv_m ) |
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286 | CALL iom_put( 'sst_m', sst_m ) |
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287 | CALL iom_put( 'sss_m', sss_m ) |
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288 | CALL iom_put( 'ssh_m', ssh_m ) |
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289 | CALL iom_put( 'e3t_m', e3t_m ) |
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290 | CALL iom_put( 'frq_m', frq_m ) |
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291 | ENDIF |
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292 | ! |
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293 | END SUBROUTINE sbc_ssm |
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294 | |
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295 | |
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296 | SUBROUTINE sbc_ssm_init |
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297 | !!---------------------------------------------------------------------- |
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298 | !! *** ROUTINE sbc_ssm_init *** |
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299 | !! |
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300 | !! ** Purpose : Initialisation of the sbc data |
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301 | !! |
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302 | !! ** Action : - read parameters |
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303 | !!---------------------------------------------------------------------- |
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304 | REAL(wp) :: zcoef, zf_sbc ! local scalar |
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305 | INTEGER :: ji, jj ! loop index |
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306 | !!---------------------------------------------------------------------- |
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307 | ! |
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308 | IF( nn_fsbc == 1 ) THEN |
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309 | ! |
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310 | IF(lwp) WRITE(numout,*) |
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311 | IF(lwp) WRITE(numout,*) 'sbc_ssm_init : sea surface mean fields, nn_fsbc=1 : instantaneous values' |
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312 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~ ' |
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313 | ! |
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314 | ELSE |
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315 | ! |
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316 | IF(lwp) WRITE(numout,*) |
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317 | IF(lwp) WRITE(numout,*) 'sbc_ssm_init : sea surface mean fields' |
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318 | IF(lwp) WRITE(numout,*) '~~~~~~~~~~~~ ' |
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319 | ! |
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320 | IF( ln_rstart .AND. iom_varid( numror, 'nn_fsbc', ldstop = .FALSE. ) > 0 ) THEN |
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321 | l_ssm_mean = .TRUE. |
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322 | CALL iom_get( numror , 'nn_fsbc', zf_sbc ) ! sbc frequency of previous run |
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323 | CALL iom_get( numror, jpdom_autoglo, 'ssu_m' , ssu_m ) ! sea surface mean velocity (U-point) |
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324 | CALL iom_get( numror, jpdom_autoglo, 'ssv_m' , ssv_m ) ! " " velocity (V-point) |
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325 | CALL iom_get( numror, jpdom_autoglo, 'sst_m' , sst_m ) ! " " temperature (T-point) |
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326 | CALL iom_get( numror, jpdom_autoglo, 'sss_m' , sss_m ) ! " " salinity (T-point) |
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327 | CALL iom_get( numror, jpdom_autoglo, 'ssh_m' , ssh_m ) ! " " height (T-point) |
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328 | CALL iom_get( numror, jpdom_autoglo, 'e3t_m' , e3t_m ) ! 1st level thickness (T-point) |
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329 | ! fraction of solar net radiation absorbed in 1st T level |
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330 | IF( iom_varid( numror, 'frq_m', ldstop = .FALSE. ) > 0 ) THEN |
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331 | CALL iom_get( numror, jpdom_autoglo, 'frq_m' , frq_m ) |
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332 | ELSE |
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333 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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334 | DO jj = 1, jpj |
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335 | DO ji = 1, jpi |
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336 | frq_m(ji,jj) = 1._wp ! default definition |
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337 | END DO |
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338 | END DO |
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339 | ENDIF |
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340 | ! |
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341 | IF( zf_sbc /= REAL( nn_fsbc, wp ) ) THEN ! nn_fsbc has changed between 2 runs |
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342 | IF(lwp) WRITE(numout,*) ' restart with a change in the frequency of mean from ', zf_sbc, ' to ', nn_fsbc |
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343 | zcoef = REAL( nn_fsbc - 1, wp ) / zf_sbc |
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344 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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345 | DO jj = 1, jpj |
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346 | DO ji = 1, jpi |
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347 | ssu_m(ji,jj) = zcoef * ssu_m(ji,jj) |
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348 | ssv_m(ji,jj) = zcoef * ssv_m(ji,jj) |
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349 | sst_m(ji,jj) = zcoef * sst_m(ji,jj) |
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350 | sss_m(ji,jj) = zcoef * sss_m(ji,jj) |
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351 | ssh_m(ji,jj) = zcoef * ssh_m(ji,jj) |
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352 | e3t_m(ji,jj) = zcoef * e3t_m(ji,jj) |
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353 | frq_m(ji,jj) = zcoef * frq_m(ji,jj) |
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354 | END DO |
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355 | END DO |
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356 | ELSE |
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357 | IF(lwp) WRITE(numout,*) ' mean fields read in the ocean restart file' |
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358 | ENDIF |
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359 | ENDIF |
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360 | ENDIF |
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361 | ! |
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362 | IF( .NOT. l_ssm_mean ) THEN ! default initialisation. needed by lim_istate |
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363 | ! |
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364 | IF(lwp) WRITE(numout,*) ' default initialisation of ss._m arrays' |
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365 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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366 | DO jj = 1, jpj |
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367 | DO ji = 1, jpi |
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368 | ssu_m(ji,jj) = ub(ji,jj,1) |
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369 | ssv_m(ji,jj) = vb(ji,jj,1) |
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370 | END DO |
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371 | END DO |
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372 | IF( l_useCT ) THEN ; sst_m(:,:) = eos_pt_from_ct( tsn(:,:,1,jp_tem), tsn(:,:,1,jp_sal) ) |
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373 | ELSE ; sst_m(:,:) = tsn(:,:,1,jp_tem) |
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374 | ENDIF |
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375 | !$OMP PARALLEL DO schedule(static) private(jj, ji) |
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376 | DO jj = 1, jpj |
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377 | DO ji = 1, jpi |
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378 | sss_m(ji,jj) = tsn (ji,jj,1,jp_sal) |
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379 | ssh_m(ji,jj) = sshn (ji,jj) |
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380 | e3t_m(ji,jj) = e3t_n(ji,jj,1) |
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381 | frq_m(ji,jj) = 1._wp |
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382 | END DO |
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383 | END DO |
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384 | ! |
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385 | ENDIF |
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386 | ! |
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387 | END SUBROUTINE sbc_ssm_init |
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388 | |
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389 | !!====================================================================== |
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390 | END MODULE sbcssm |
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