1 | MODULE daymod |
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2 | !!====================================================================== |
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3 | !! *** MODULE daymod *** |
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4 | !! Ocean : calendar |
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5 | !!===================================================================== |
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6 | |
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7 | !!---------------------------------------------------------------------- |
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8 | !! day : calendar |
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9 | !!---------------------------------------------------------------------- |
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10 | !! * Modules used |
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11 | USE dom_oce ! ocean space and time domain |
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12 | USE phycst ! physical constants |
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13 | USE in_out_manager ! I/O manager |
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14 | |
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15 | IMPLICIT NONE |
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16 | PRIVATE |
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17 | |
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18 | !! * Routine accessibility |
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19 | PUBLIC day ! called by step.F90 |
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20 | |
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21 | !! * Shared module variables |
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22 | INTEGER , PUBLIC :: & !: |
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23 | nyear , & !: current year |
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24 | nmonth , & !: current month |
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25 | nday , & !: current day of the month |
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26 | nday_year , & !: curent day counted from jan 1st of the current year |
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27 | ndastp !: time step date in year/month/day aammjj |
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28 | |
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29 | REAL(wp), PUBLIC :: & !: |
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30 | adatrj , & !: number of elapsed days since the begining of the run |
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31 | adatrj0 !: value of adatrj at nit000-1 (before the present run). |
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32 | ! ! it is the accumulated duration of previous runs |
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33 | ! ! that may have been run with different time steps. |
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34 | |
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35 | INTEGER, PUBLIC, DIMENSION(12) :: nbiss = (/ 31, 29, 31, 30, 31, 30, & !: number of days per month |
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36 | & 31, 31, 30, 31, 30, 31 /) !: (leap-year) |
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37 | INTEGER, PUBLIC, DIMENSION(12) :: nobis = (/ 31, 28, 31, 30, 31, 30, & !: number of days per month |
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38 | & 31, 31, 30, 31, 30, 31 /) !: (365 days a year) |
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39 | |
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40 | !!---------------------------------------------------------------------- |
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41 | !! OPA 9.0 , LOCEAN-IPSL (2005) |
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42 | !! $Header$ |
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43 | !! This software is governed by the CeCILL licence see modipsl/doc/NEMO_CeCILL.txt |
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44 | !!---------------------------------------------------------------------- |
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45 | |
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46 | CONTAINS |
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47 | |
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48 | SUBROUTINE day( kt ) |
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49 | !!---------------------------------------------------------------------- |
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50 | !! *** ROUTINE day *** |
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51 | !! |
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52 | !! ** Purpose : Compute the date with a day iteration IF necessary. |
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53 | !! |
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54 | !! ** Method : - ??? |
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55 | !! |
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56 | !! ** Action : - nyear : current year |
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57 | !! - nmonth : current month of the year nyear |
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58 | !! - nday : current day of the month nmonth |
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59 | !! - nday_year : current day of the year nyear |
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60 | !! - ndastp : =nyear*10000+nmonth*100+nday |
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61 | !! - adatrj : date in days since the beginning of the run |
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62 | !! |
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63 | !! History : |
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64 | !! ! 94-09 (M. Pontaud M. Imbard) Original code |
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65 | !! ! 97-03 (O. Marti) |
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66 | !! ! 97-05 (G. Madec) |
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67 | !! ! 97-08 (M. Imbard) |
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68 | !! 9.0 ! 03-09 (G. Madec) F90 + nyear, nmonth, nday |
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69 | !! ! 04-01 (A.M. Treguier) new calculation based on adatrj |
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70 | !!---------------------------------------------------------------------- |
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71 | !! * Arguments |
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72 | INTEGER, INTENT( in ) :: kt ! ocean time-step indices |
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73 | |
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74 | !! * Local declarations |
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75 | INTEGER :: js ! dummy loop indice |
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76 | INTEGER :: iend, iday0, iday1 ! temporary integers |
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77 | REAL(wp) :: zadatrjn, zadatrjb ! adatrj at timestep kt-1 and kt-2 |
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78 | CHARACTER (len=25) :: charout |
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79 | !!---------------------------------------------------------------------- |
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80 | |
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81 | ! 0. initialization of adatrj0 and nday, nmonth,nyear, nday_year. |
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82 | ! ndastp has been initialized in domain.F90 or restart.F90 |
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83 | !----------------------------------------------------------------- |
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84 | |
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85 | IF( kt == nit000 ) THEN |
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86 | |
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87 | IF( .NOT.ln_rstart ) adatrj0 = 0.e0 ! adatrj0 initialized in rst_read when restart |
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88 | |
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89 | adatrj = adatrj0 |
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90 | nyear = ndastp / 10000 |
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91 | nmonth = ( ndastp - (nyear * 10000) ) / 100 |
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92 | nday = ndastp - (nyear * 10000) - ( nmonth * 100 ) |
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93 | |
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94 | ! Calculates nday_year, day since january 1st (useful to read daily forcing fields) |
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95 | nday_year = nday |
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96 | ! ! accumulates days of previous months of this year |
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97 | DO js = 1, nmonth-1 |
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98 | IF( nleapy == 1 .AND. MOD( nyear, 4 ) == 0 ) THEN |
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99 | nday_year = nday_year + nbiss(js) |
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100 | ELSE |
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101 | nday_year = nday_year + nobis(js) |
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102 | ENDIF |
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103 | END DO |
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104 | |
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105 | ENDIF |
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106 | |
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107 | ! I. calculates adatrj, zadatrjn, zadatrjb. |
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108 | ! ------------------------------------------------------------------ |
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109 | |
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110 | adatrj = adatrj0 + ( kt - nit000 + 1 ) * rdttra(1) / rday |
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111 | zadatrjn = adatrj0 + ( kt - nit000 ) * rdttra(1) / rday |
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112 | zadatrjb = adatrj0 + ( kt - nit000 - 1 ) * rdttra(1) / rday |
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113 | |
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114 | |
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115 | ! II. increment the date. The date corresponds to 'now' variables (kt-1), |
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116 | ! which is the time step of forcing fields. |
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117 | ! Do not do this at nit000 unless nrstdt= 2 |
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118 | ! In that case ndastp (read in restart) was for step nit000-2 |
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119 | ! ------------------------------------------------------------------- |
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120 | |
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121 | iday0 = INT( zadatrjb ) |
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122 | iday1 = INT( zadatrjn ) |
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123 | |
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124 | IF( iday1 - iday0 >= 1 .AND. ( kt /= nit000 .OR. nrstdt == 2 ) ) THEN |
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125 | |
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126 | ! increase calendar |
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127 | nyear = ndastp / 10000 |
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128 | nmonth = ( ndastp - (nyear * 10000) ) / 100 |
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129 | nday = ndastp - (nyear * 10000) - ( nmonth * 100 ) |
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130 | nday = nday + 1 |
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131 | IF( nleapy == 1 .AND. MOD( nyear, 4 ) == 0 ) THEN |
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132 | iend = nbiss(nmonth) |
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133 | ELSEIF( nleapy > 1 ) THEN |
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134 | iend = nleapy |
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135 | ELSE |
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136 | iend = nobis(nmonth) |
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137 | ENDIF |
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138 | IF( nday == iend + 1 ) THEN |
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139 | nday = 1 |
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140 | nmonth = nmonth + 1 |
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141 | IF( nmonth == 13 ) THEN |
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142 | nmonth = 1 |
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143 | nyear = nyear + 1 |
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144 | ENDIF |
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145 | ENDIF |
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146 | ndastp = nyear * 10000 + nmonth * 100 + nday |
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147 | |
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148 | ! Calculates nday_year, day since january 1st (useful to read daily forcing fields) |
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149 | nday_year = nday |
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150 | ! ! accumulates days of previous months of this year |
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151 | DO js = 1, nmonth-1 |
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152 | IF( nleapy == 1 .AND. MOD( nyear, 4 ) == 0 ) THEN |
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153 | nday_year = nday_year + nbiss(js) |
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154 | ELSE |
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155 | nday_year = nday_year + nobis(js) |
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156 | ENDIF |
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157 | END DO |
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158 | |
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159 | IF(lwp) WRITE(numout,*)' ==============>> time-step =', kt, ' New day, DATE= ', & |
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160 | & nyear, '/', nmonth, '/', nday, 'nday_year:', nday_year |
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161 | ENDIF |
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162 | |
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163 | END SUBROUTINE day |
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164 | |
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165 | !!====================================================================== |
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166 | END MODULE daymod |
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