1 | !!---------------------------------------------------------------------- |
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2 | !! *** tau_forced_monthly.h90 *** |
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3 | !!---------------------------------------------------------------------- |
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4 | |
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5 | !!---------------------------------------------------------------------- |
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6 | !! tau : update the surface wind stress - monthly fields in NetCDF |
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7 | !! file. |
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8 | !!---------------------------------------------------------------------- |
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9 | !! * local modules variables |
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10 | INTEGER :: & |
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11 | numtau, & ! logical unit for the i-component of the wind data |
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12 | numtav, & ! logical unit for the j-component of the wind data |
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13 | ntau1, ntau2 ! index of the first and second record used |
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14 | REAL(wp), DIMENSION(jpi,jpj,2) :: & |
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15 | taux_dta, & ! i- and j-components of the surface stress (Pascal) |
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16 | tauy_dta ! at 2 consecutive months in the (i,j) referential |
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17 | !!---------------------------------------------------------------------- |
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18 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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19 | !! $Header$ |
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20 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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21 | !!---------------------------------------------------------------------- |
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22 | |
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23 | CONTAINS |
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24 | |
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25 | SUBROUTINE tau( kt ) |
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26 | !!--------------------------------------------------------------------- |
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27 | !! *** ROUTINE tau *** |
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28 | !! |
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29 | !! ** Purpose : provide to the ocean the stress at each time step |
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30 | !! |
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31 | !! ** Method : - Read the 2 monthly surface stress components in NetCDF |
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32 | !! file at 2 consecutive time-steps |
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33 | !! They are given in the (i,j) referential |
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34 | !! The i-component is given at U-point (INTERP package) |
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35 | !! The j-component is given at V-point (INTERP package) |
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36 | !! - a linear time-interpolation is performed to provide the |
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37 | !! stress at the kt time-step. |
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38 | !! |
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39 | !! CAUTION: never mask the surface stress field ! |
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40 | !! |
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41 | !! ** Action : |
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42 | !! update at each time-step the two components of the surface |
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43 | !! stress in both (i,j) and geographical referencial |
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44 | !! |
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45 | !! History : |
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46 | !! 4.0 ! 91-03 (G. Madec) Original code |
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47 | !! 6.0 ! 92-07 (M. Imbard) |
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48 | !! 8.1 ! 00-08 (D. Ludicone) adapted to ERS-NCEP |
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49 | !! 8.5 ! 02-11 (G. Madec) F90: Free form and module |
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50 | !! ! daily/monthly, forced/coupled form |
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51 | !!---------------------------------------------------------------------- |
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52 | !! * Modules used |
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53 | USE iom |
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54 | !! * Arguments |
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55 | INTEGER, INTENT( in ) :: kt ! ocean time step |
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56 | |
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57 | !! * Local declarations |
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58 | INTEGER :: imois, iman, i15 |
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59 | REAL(wp) :: zxy ! coefficient of the linear time interpolation |
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60 | !!--------------------------------------------------------------------- |
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61 | |
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62 | ! -------------- ! |
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63 | ! Initialization ! |
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64 | ! -------------- ! |
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65 | |
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66 | ! iman=number of dates in data file (12 for a year of monthly values) |
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67 | iman = INT( raamo ) |
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68 | i15 = INT( 2*FLOAT( nday ) / ( FLOAT( nobis(nmonth) ) + 0.5 ) ) |
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69 | imois = nmonth + i15 - 1 |
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70 | IF( imois == 0 ) imois = iman |
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71 | |
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72 | ! -------------------- ! |
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73 | ! First call kt=nit000 ! |
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74 | ! -------------------- ! |
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75 | |
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76 | IF( kt == nit000 ) THEN |
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77 | |
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78 | ntau1 = 0 ! initialization |
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79 | IF(lwp) THEN |
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80 | WRITE(numout,*) |
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81 | WRITE(numout,*) ' tau : MONTHLY climatological wind stress (NetCDF files)' |
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82 | ENDIF |
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83 | CALL iom_open ( 'taux_1m.nc', numtau ) |
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84 | CALL iom_open ( 'tauy_1m.nc', numtav ) |
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85 | |
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86 | ENDIF |
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87 | |
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88 | ! ----------------- ! |
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89 | ! Read monthly file ! |
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90 | ! ----------------- ! |
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91 | |
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92 | IF( kt == nit000 .OR. imois /= ntau1 ) THEN |
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93 | |
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94 | ! Calendar computation |
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95 | ntau1 = imois ! index of the first record |
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96 | ntau2 = ntau1 + 1 ! index of the last record |
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97 | ntau1 = MOD( ntau1, iman ) |
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98 | IF( ntau1 == 0 ) ntau1 = iman |
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99 | ntau2 = MOD( ntau2, iman ) |
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100 | IF( ntau2 == 0 ) ntau2 = iman |
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101 | IF(lwp) WRITE(numout,*) 'first month used ntau1 = ', ntau1 |
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102 | IF(lwp) WRITE(numout,*) 'last month used ntau2 = ', ntau2 |
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103 | |
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104 | ! Read the corresponding 2 monthly stress data |
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105 | ! ntau1 |
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106 | CALL iom_get ( numtau, jpdom_data, 'sozotaux', taux_dta(:,:,1), ntau1 ) |
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107 | CALL iom_get ( numtav, jpdom_data, 'sometauy', tauy_dta(:,:,1), ntau1 ) |
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108 | |
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109 | CALL iom_get ( numtau, jpdom_data, 'sozotaux', taux_dta(:,:,2), ntau2 ) |
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110 | CALL iom_get ( numtav, jpdom_data, 'sometauy', tauy_dta(:,:,2), ntau2 ) |
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111 | |
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112 | IF(lwp .AND. nitend-nit000 <= 100 ) THEN |
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113 | WRITE(numout,*) |
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114 | WRITE(numout,*) ' monthly stress read' |
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115 | WRITE(numout,*) |
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116 | WRITE(numout,*) ' month: ', ntau1, ' taux: 1 multiply by ', 1. |
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117 | CALL prihre( taux_dta(:,:,1), jpi, jpj, 1, jpi, 20, 1, jpj, 10, 1., numout ) |
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118 | WRITE(numout,*) |
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119 | WRITE(numout,*) ' month: ', ntau2, ' tauy: 2 multiply by ', 1. |
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120 | CALL prihre( tauy_dta(:,:,2), jpi, jpj, 1, jpi, 20, 1, jpj, 10, 1., numout ) |
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121 | ENDIF |
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122 | |
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123 | CALL FLUSH(numout) |
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124 | ENDIF |
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125 | |
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126 | ! ------------------------------- ! |
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127 | ! linear time interpolation at kt ! |
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128 | ! ------------------------------- ! |
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129 | |
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130 | ! zxy : coefficient for linear interpolation in time |
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131 | |
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132 | zxy = FLOAT( nday ) / FLOAT( nobis(ntau1) ) + 0.5 - i15 |
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133 | |
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134 | taux(:,:) = (1.-zxy) * taux_dta(:,:,1) + zxy * taux_dta(:,:,2) |
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135 | tauy(:,:) = (1.-zxy) * tauy_dta(:,:,1) + zxy * tauy_dta(:,:,2) |
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136 | |
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137 | ! Save components |
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138 | |
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139 | tauxg(:,:) = taux(:,:) |
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140 | tauyg(:,:) = tauy(:,:) |
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141 | |
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142 | CALL FLUSH(numout) |
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143 | |
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144 | ! ------------------- ! |
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145 | ! Last call kt=nitend ! |
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146 | ! ------------------- ! |
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147 | |
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148 | ! Closing of the 2 files (required in mpp) |
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149 | IF( kt == nitend ) THEN |
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150 | CALL iom_close(numtau) |
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151 | CALL iom_close(numtav) |
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152 | ENDIF |
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153 | |
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154 | END SUBROUTINE tau |
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