1 | MODULE daymod |
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2 | !!====================================================================== |
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3 | !! *** MODULE daymod *** |
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4 | !! Ocean : management of the model calendar |
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5 | !!===================================================================== |
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6 | !! History : OPA ! 1994-09 (M. Pontaud M. Imbard) Original code |
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7 | !! ! 1997-03 (O. Marti) |
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8 | !! ! 1997-05 (G. Madec) |
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9 | !! ! 1997-08 (M. Imbard) |
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10 | !! NEMO 1.0 ! 2003-09 (G. Madec) F90 + nyear, nmonth, nday |
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11 | !! ! 2004-01 (A.M. Treguier) new calculation based on adatrj |
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12 | !! ! 2006-08 (G. Madec) surface module major update |
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13 | !! ! 2015-11 (D. Lea) Allow non-zero initial time of day |
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14 | !!---------------------------------------------------------------------- |
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15 | |
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16 | !!---------------------------------------------------------------------- |
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17 | !! day : calendar |
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18 | !!---------------------------------------------------------------------- |
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19 | !! ----------- WARNING ----------- |
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20 | !! ------------------------------- |
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21 | !! sbcmod assume that the time step is dividing the number of second of |
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22 | !! in a day, i.e. ===> MOD( rday, rdt ) == 0 |
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23 | !! except when user defined forcing is used (see sbcmod.F90) |
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24 | !!---------------------------------------------------------------------- |
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25 | USE dom_oce ! ocean space and time domain |
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26 | USE phycst ! physical constants |
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27 | USE ioipsl , ONLY : ymds2ju ! for calendar |
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28 | ! |
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29 | USE in_out_manager ! I/O manager |
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30 | USE prtctl ! Print control |
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31 | USE iom ! |
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32 | USE timing ! Timing |
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33 | |
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34 | IMPLICIT NONE |
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35 | PRIVATE |
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36 | |
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37 | PUBLIC day ! called by step.F90 |
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38 | PUBLIC day_init ! called by istate.F90 |
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39 | PUBLIC day_mth ! Needed by TAM |
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40 | |
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41 | INTEGER, PUBLIC :: nsecd, nsecd05, ndt, ndt05 !: (PUBLIC for TAM) |
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42 | |
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43 | !!---------------------------------------------------------------------- |
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44 | !! NEMO/OCE 4.0 , NEMO Consortium (2018) |
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45 | !! $Id: daymod.F90 10068 2018-08-28 14:09:04Z nicolasmartin $ |
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46 | !! Software governed by the CeCILL license (see ./LICENSE) |
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47 | !!---------------------------------------------------------------------- |
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48 | CONTAINS |
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49 | |
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50 | SUBROUTINE day_init |
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51 | !!---------------------------------------------------------------------- |
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52 | !! *** ROUTINE day_init *** |
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53 | !! |
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54 | !! ** Purpose : Initialization of the calendar values to their values 1 time step before nit000 |
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55 | !! because day will be called at the beginning of step |
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56 | !! |
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57 | !! ** Action : - nyear : current year |
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58 | !! - nmonth : current month of the year nyear |
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59 | !! - nday : current day of the month nmonth |
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60 | !! - nday_year : current day of the year nyear |
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61 | !! - nsec_year : current time step counted in second since 00h jan 1st of the current year |
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62 | !! - nsec_month : current time step counted in second since 00h 1st day of the current month |
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63 | !! - nsec_day : current time step counted in second since 00h of the current day |
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64 | !! - nsec1jan000 : second since Jan. 1st 00h of nit000 year and Jan. 1st 00h of the current year |
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65 | !! - nmonth_len, nyear_len, nmonth_half, nmonth_end through day_mth |
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66 | !!---------------------------------------------------------------------- |
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67 | INTEGER :: inbday, idweek ! local integers |
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68 | REAL(wp) :: zjul ! local scalar |
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69 | !!---------------------------------------------------------------------- |
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70 | ! |
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71 | ! max number of seconds between each restart |
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72 | IF( REAL( nitend - nit000 + 1 ) * rdt > REAL( HUGE( nsec1jan000 ) ) ) THEN |
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73 | CALL ctl_stop( 'The number of seconds between each restart exceeds the integer 4 max value: 2^31-1. ', & |
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74 | & 'You must do a restart at higher frequency (or remove this stop and recompile the code in I8)' ) |
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75 | ENDIF |
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76 | nsecd = NINT( rday ) |
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77 | nsecd05 = NINT( 0.5 * rday ) |
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78 | ndt = NINT( rdt ) |
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79 | ndt05 = NINT( 0.5 * rdt ) |
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80 | |
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81 | |
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82 | ! set the calandar from ndastp (read in restart file and namelist) |
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83 | nyear = ndastp / 10000 |
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84 | nmonth = ( ndastp - (nyear * 10000) ) / 100 |
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85 | nday = ndastp - (nyear * 10000) - ( nmonth * 100 ) |
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86 | |
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87 | nhour = nn_time0 / 100 |
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88 | nminute = ( nn_time0 - nhour * 100 ) |
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89 | |
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90 | CALL ymds2ju( nyear, nmonth, nday, nhour*3600._wp+nminute*60._wp, fjulday ) |
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91 | IF( ABS(fjulday - REAL(NINT(fjulday),wp)) < 0.1 / rday ) fjulday = REAL(NINT(fjulday),wp) ! avoid truncation error |
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92 | IF( nn_time0*3600 - ndt05 .lt. 0 ) fjulday = fjulday + 1. ! move back to the day at nit000 (and not at nit000 - 1) |
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93 | |
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94 | nsec1jan000 = 0 |
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95 | CALL day_mth |
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96 | |
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97 | IF ( nday == 0 ) THEN ! for ex if ndastp = ndate0 - 1 |
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98 | nmonth = nmonth - 1 |
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99 | nday = nmonth_len(nmonth) |
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100 | ENDIF |
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101 | IF ( nmonth == 0 ) THEN ! go at the end of previous year |
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102 | nmonth = 12 |
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103 | nyear = nyear - 1 |
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104 | nsec1jan000 = nsec1jan000 - nsecd * nyear_len(0) |
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105 | IF( nleapy == 1 ) CALL day_mth |
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106 | ENDIF |
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107 | |
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108 | ! day since january 1st |
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109 | nday_year = nday + SUM( nmonth_len(1:nmonth - 1) ) |
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110 | |
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111 | !compute number of days between last monday and today |
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112 | CALL ymds2ju( 1900, 01, 01, 0.0, zjul ) ! compute julian day value of 01.01.1900 (our reference that was a Monday) |
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113 | inbday = FLOOR(fjulday - zjul) ! compute nb day between 01.01.1900 and start of current day |
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114 | idweek = MOD(inbday, 7) ! compute nb day between last monday and current day |
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115 | IF (idweek .lt. 0) idweek=idweek+7 ! Avoid negative values for dates before 01.01.1900 |
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116 | |
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117 | ! number of seconds since the beginning of current year/month/week/day at the middle of the time-step |
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118 | IF (nhour*3600+nminute*60-ndt05 .gt. 0) THEN |
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119 | ! 1 timestep before current middle of first time step is still the same day |
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120 | nsec_year = (nday_year-1) * nsecd + nhour*3600+nminute*60 - ndt05 |
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121 | nsec_month = (nday-1) * nsecd + nhour*3600+nminute*60 - ndt05 |
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122 | ELSE |
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123 | ! 1 time step before the middle of the first time step is the previous day |
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124 | nsec_year = nday_year * nsecd + nhour*3600+nminute*60 - ndt05 |
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125 | nsec_month = nday * nsecd + nhour*3600+nminute*60 - ndt05 |
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126 | ENDIF |
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127 | nsec_week = idweek * nsecd + nhour*3600+nminute*60 - ndt05 |
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128 | nsec_day = nhour*3600+nminute*60 - ndt05 |
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129 | IF( nsec_day .lt. 0 ) nsec_day = nsec_day + nsecd |
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130 | IF( nsec_week .lt. 0 ) nsec_week = nsec_week + nsecd*7 |
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131 | |
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132 | ! control print |
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133 | IF(lwp) WRITE(numout,'(a,i6,a,i2,a,i2,a,i8,a,i8,a,i8,a,i8)') & |
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134 | & ' =======>> 1/2 time step before the start of the run DATE Y/M/D = ', & |
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135 | & nyear, '/', nmonth, '/', nday, ' nsec_day:', nsec_day, ' nsec_week:', nsec_week, ' & |
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136 | & nsec_month:', nsec_month , ' nsec_year:' , nsec_year |
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137 | |
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138 | ! Up to now, calendar parameters are related to the end of previous run (nit000-1) |
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139 | ! call day to set the calendar parameters at the begining of the current simulaton. needed by iom_init |
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140 | CALL day( nit000 ) |
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141 | ! |
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142 | IF( lwxios ) THEN |
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143 | ! define variables in restart file when writing with XIOS |
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144 | CALL iom_set_rstw_var_active('kt') |
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145 | CALL iom_set_rstw_var_active('ndastp') |
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146 | CALL iom_set_rstw_var_active('adatrj') |
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147 | CALL iom_set_rstw_var_active('ntime') |
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148 | ENDIF |
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149 | |
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150 | END SUBROUTINE day_init |
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151 | |
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152 | |
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153 | SUBROUTINE day_mth |
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154 | !!---------------------------------------------------------------------- |
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155 | !! *** ROUTINE day_init *** |
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156 | !! |
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157 | !! ** Purpose : calendar values related to the months |
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158 | !! |
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159 | !! ** Action : - nmonth_len : length in days of the months of the current year |
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160 | !! - nyear_len : length in days of the previous/current year |
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161 | !! - nmonth_half : second since the beginning of the year and the halft of the months |
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162 | !! - nmonth_end : second since the beginning of the year and the end of the months |
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163 | !!---------------------------------------------------------------------- |
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164 | INTEGER :: jm ! dummy loop indice |
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165 | !!---------------------------------------------------------------------- |
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166 | |
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167 | ! length of the month of the current year (from nleapy, read in namelist) |
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168 | IF ( nleapy < 2 ) THEN |
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169 | nmonth_len(:) = (/ 31, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 31 /) |
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170 | nyear_len(:) = 365 |
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171 | IF ( nleapy == 1 ) THEN ! we are using calandar with leap years |
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172 | IF ( MOD(nyear-1, 4) == 0 .AND. ( MOD(nyear-1, 400) == 0 .OR. MOD(nyear-1, 100) /= 0 ) ) THEN |
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173 | nyear_len(0) = 366 |
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174 | ENDIF |
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175 | IF ( MOD(nyear , 4) == 0 .AND. ( MOD(nyear , 400) == 0 .OR. MOD(nyear , 100) /= 0 ) ) THEN |
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176 | nmonth_len(2) = 29 |
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177 | nyear_len(1) = 366 |
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178 | ENDIF |
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179 | IF ( MOD(nyear+1, 4) == 0 .AND. ( MOD(nyear+1, 400) == 0 .OR. MOD(nyear+1, 100) /= 0 ) ) THEN |
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180 | nyear_len(2) = 366 |
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181 | ENDIF |
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182 | ENDIF |
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183 | ELSE |
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184 | nmonth_len(:) = nleapy ! all months with nleapy days per year |
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185 | nyear_len(:) = 12 * nleapy |
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186 | ENDIF |
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187 | |
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188 | ! half month in second since the begining of the year: |
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189 | ! time since Jan 1st 0 1 2 ... 11 12 13 |
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190 | ! ---------*--|--*--|--*--| ... |--*--|--*--|--*--|-------------------------------------- |
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191 | ! <---> <---> <---> ... <---> <---> <---> |
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192 | ! month number 0 1 2 ... 11 12 13 |
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193 | ! |
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194 | ! nmonth_half(jm) = rday * REAL( 0.5 * nmonth_len(jm) + SUM(nmonth_len(1:jm-1)) ) |
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195 | nmonth_half(0) = - nsecd05 * nmonth_len(0) |
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196 | DO jm = 1, 13 |
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197 | nmonth_half(jm) = nmonth_half(jm-1) + nsecd05 * ( nmonth_len(jm-1) + nmonth_len(jm) ) |
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198 | END DO |
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199 | |
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200 | nmonth_end(0) = 0 |
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201 | DO jm = 1, 13 |
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202 | nmonth_end(jm) = nmonth_end(jm-1) + nsecd * nmonth_len(jm) |
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203 | END DO |
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204 | ! |
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205 | END SUBROUTINE |
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206 | |
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207 | |
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208 | SUBROUTINE day( kt ) |
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209 | !!---------------------------------------------------------------------- |
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210 | !! *** ROUTINE day *** |
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211 | !! |
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212 | !! ** Purpose : Compute the date with a day iteration IF necessary. |
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213 | !! |
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214 | !! ** Method : - ??? |
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215 | !! |
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216 | !! ** Action : - nyear : current year |
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217 | !! - nmonth : current month of the year nyear |
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218 | !! - nday : current day of the month nmonth |
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219 | !! - nday_year : current day of the year nyear |
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220 | !! - ndastp : = nyear*10000 + nmonth*100 + nday |
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221 | !! - adatrj : date in days since the beginning of the run |
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222 | !! - nsec_year : current time of the year (in second since 00h, jan 1st) |
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223 | !!---------------------------------------------------------------------- |
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224 | INTEGER, INTENT(in) :: kt ! ocean time-step indices |
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225 | ! |
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226 | CHARACTER (len=25) :: charout |
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227 | REAL(wp) :: zprec ! fraction of day corresponding to 0.1 second |
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228 | !!---------------------------------------------------------------------- |
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229 | ! |
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230 | IF( ln_timing ) CALL timing_start('day') |
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231 | ! |
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232 | zprec = 0.1 / rday |
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233 | ! ! New time-step |
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234 | nsec_year = nsec_year + ndt |
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235 | nsec_month = nsec_month + ndt |
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236 | nsec_week = nsec_week + ndt |
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237 | nsec_day = nsec_day + ndt |
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238 | adatrj = adatrj + rdt / rday |
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239 | fjulday = fjulday + rdt / rday |
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240 | IF( ABS(fjulday - REAL(NINT(fjulday),wp)) < zprec ) fjulday = REAL(NINT(fjulday),wp) ! avoid truncation error |
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241 | IF( ABS(adatrj - REAL(NINT(adatrj ),wp)) < zprec ) adatrj = REAL(NINT(adatrj ),wp) ! avoid truncation error |
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242 | |
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243 | IF( nsec_day > nsecd ) THEN ! New day |
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244 | ! |
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245 | nday = nday + 1 |
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246 | nday_year = nday_year + 1 |
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247 | nsec_day = ndt05 |
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248 | ! |
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249 | IF( nday == nmonth_len(nmonth) + 1 ) THEN ! New month |
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250 | nday = 1 |
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251 | nmonth = nmonth + 1 |
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252 | nsec_month = ndt05 |
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253 | IF( nmonth == 13 ) THEN ! New year |
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254 | nyear = nyear + 1 |
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255 | nmonth = 1 |
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256 | nday_year = 1 |
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257 | nsec_year = ndt05 |
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258 | nsec1jan000 = nsec1jan000 + nsecd * nyear_len(1) |
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259 | IF( nleapy == 1 ) CALL day_mth |
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260 | ENDIF |
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261 | ENDIF |
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262 | ! |
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263 | ndastp = nyear * 10000 + nmonth * 100 + nday ! New date |
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264 | ! |
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265 | !compute first day of the year in julian days |
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266 | CALL ymds2ju( nyear, 01, 01, 0.0, fjulstartyear ) |
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267 | ! |
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268 | IF(lwp) WRITE(numout,'(a,i8,a,i4.4,a,i2.2,a,i2.2,a,i3.3)') '======>> time-step =', kt, & |
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269 | & ' New day, DATE Y/M/D = ', nyear, '/', nmonth, '/', nday, ' nday_year = ', nday_year |
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270 | IF(lwp) WRITE(numout,'(a,i8,a,i7,a,i5)') ' nsec_year = ', nsec_year, & |
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271 | & ' nsec_month = ', nsec_month, ' nsec_day = ', nsec_day, ' nsec_week = ', nsec_week |
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272 | ENDIF |
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273 | |
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274 | IF( nsec_week > 7*nsecd ) nsec_week = ndt05 ! New week |
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275 | |
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276 | IF(ln_ctl) THEN |
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277 | WRITE(charout,FMT="('kt =', I4,' d/m/y =',I2,I2,I4)") kt, nday, nmonth, nyear |
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278 | CALL prt_ctl_info(charout) |
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279 | ENDIF |
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280 | |
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281 | IF( lrst_oce ) CALL day_rst( kt, 'WRITE' ) ! write day restart information |
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282 | ! |
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283 | IF( ln_timing ) CALL timing_stop('day') |
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284 | ! |
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285 | END SUBROUTINE day |
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286 | |
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287 | |
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288 | SUBROUTINE day_rst( kt, cdrw ) |
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289 | !!--------------------------------------------------------------------- |
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290 | !! *** ROUTINE day_rst *** |
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291 | !! |
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292 | !! ** Purpose : Read or write calendar in restart file: |
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293 | !! |
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294 | !! WRITE(READ) mode: |
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295 | !! kt : number of time step since the begining of the experiment at the |
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296 | !! end of the current(previous) run |
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297 | !! adatrj(0) : number of elapsed days since the begining of the experiment at the |
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298 | !! end of the current(previous) run (REAL -> keep fractions of day) |
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299 | !! ndastp : date at the end of the current(previous) run (coded as yyyymmdd integer) |
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300 | !! |
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301 | !! According to namelist parameter nrstdt, |
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302 | !! nrstdt = 0 no control on the date (nit000 is arbitrary). |
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303 | !! nrstdt = 1 we verify that nit000 is equal to the last |
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304 | !! time step of previous run + 1. |
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305 | !! In both those options, the exact duration of the experiment |
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306 | !! since the beginning (cumulated duration of all previous restart runs) |
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307 | !! is not stored in the restart and is assumed to be (nit000-1)*rdt. |
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308 | !! This is valid is the time step has remained constant. |
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309 | !! |
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310 | !! nrstdt = 2 the duration of the experiment in days (adatrj) |
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311 | !! has been stored in the restart file. |
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312 | !!---------------------------------------------------------------------- |
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313 | INTEGER , INTENT(in) :: kt ! ocean time-step |
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314 | CHARACTER(len=*), INTENT(in) :: cdrw ! "READ"/"WRITE" flag |
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315 | ! |
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316 | REAL(wp) :: zkt, zndastp, zdayfrac, ksecs, ktime |
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317 | INTEGER :: ihour, iminute |
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318 | !!---------------------------------------------------------------------- |
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319 | |
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320 | IF( TRIM(cdrw) == 'READ' ) THEN |
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321 | |
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322 | IF( iom_varid( numror, 'kt', ldstop = .FALSE. ) > 0 ) THEN |
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323 | ! Get Calendar informations |
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324 | CALL iom_get( numror, 'kt', zkt, ldxios = lrxios ) ! last time-step of previous run |
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325 | IF(lwp) THEN |
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326 | WRITE(numout,*) ' *** Info read in restart : ' |
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327 | WRITE(numout,*) ' previous time-step : ', NINT( zkt ) |
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328 | WRITE(numout,*) ' *** restart option' |
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329 | SELECT CASE ( nrstdt ) |
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330 | CASE ( 0 ) ; WRITE(numout,*) ' nrstdt = 0 : no control of nit000' |
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331 | CASE ( 1 ) ; WRITE(numout,*) ' nrstdt = 1 : no control the date at nit000 (use ndate0 read in the namelist)' |
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332 | CASE ( 2 ) ; WRITE(numout,*) ' nrstdt = 2 : calendar parameters read in restart' |
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333 | END SELECT |
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334 | WRITE(numout,*) |
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335 | ENDIF |
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336 | ! Control of date |
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337 | IF( nit000 - NINT( zkt ) /= 1 .AND. nrstdt /= 0 ) & |
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338 | & CALL ctl_stop( ' ===>>>> : problem with nit000 for the restart', & |
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339 | & ' verify the restart file or rerun with nrstdt = 0 (namelist)' ) |
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340 | ! define ndastp and adatrj |
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341 | IF ( nrstdt == 2 ) THEN |
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342 | ! read the parameters corresponding to nit000 - 1 (last time step of previous run) |
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343 | CALL iom_get( numror, 'ndastp', zndastp, ldxios = lrxios ) |
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344 | ndastp = NINT( zndastp ) |
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345 | CALL iom_get( numror, 'adatrj', adatrj , ldxios = lrxios ) |
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346 | CALL iom_get( numror, 'ntime' , ktime , ldxios = lrxios ) |
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347 | nn_time0=INT(ktime) |
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348 | ! calculate start time in hours and minutes |
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349 | zdayfrac=adatrj-INT(adatrj) |
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350 | ksecs = NINT(zdayfrac*86400) ! Nearest second to catch rounding errors in adatrj |
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351 | ihour = INT(ksecs/3600) |
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352 | iminute = ksecs/60-ihour*60 |
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353 | |
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354 | ! Add to nn_time0 |
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355 | nhour = nn_time0 / 100 |
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356 | nminute = ( nn_time0 - nhour * 100 ) |
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357 | nminute=nminute+iminute |
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358 | |
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359 | IF( nminute >= 60 ) THEN |
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360 | nminute=nminute-60 |
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361 | nhour=nhour+1 |
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362 | ENDIF |
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363 | nhour=nhour+ihour |
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364 | IF( nhour >= 24 ) THEN |
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365 | nhour=nhour-24 |
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366 | adatrj=adatrj+1 |
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367 | ENDIF |
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368 | nn_time0 = nhour * 100 + nminute |
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369 | adatrj = INT(adatrj) ! adatrj set to integer as nn_time0 updated |
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370 | ELSE |
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371 | ! parameters corresponding to nit000 - 1 (as we start the step loop with a call to day) |
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372 | ndastp = ndate0 ! ndate0 read in the namelist in dom_nam |
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373 | nhour = nn_time0 / 100 |
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374 | nminute = ( nn_time0 - nhour * 100 ) |
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375 | IF( nhour*3600+nminute*60-ndt05 .lt. 0 ) ndastp=ndastp-1 ! Start hour is specified in the namelist (default 0) |
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376 | adatrj = ( REAL( nit000-1, wp ) * rdt ) / rday |
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377 | ! note this is wrong if time step has changed during run |
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378 | ENDIF |
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379 | ELSE |
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380 | ! parameters corresponding to nit000 - 1 (as we start the step loop with a call to day) |
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381 | ndastp = ndate0 ! ndate0 read in the namelist in dom_nam |
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382 | nhour = nn_time0 / 100 |
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383 | nminute = ( nn_time0 - nhour * 100 ) |
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384 | IF( nhour*3600+nminute*60-ndt05 .lt. 0 ) ndastp=ndastp-1 ! Start hour is specified in the namelist (default 0) |
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385 | adatrj = ( REAL( nit000-1, wp ) * rdt ) / rday |
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386 | ENDIF |
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387 | IF( ABS(adatrj - REAL(NINT(adatrj),wp)) < 0.1 / rday ) adatrj = REAL(NINT(adatrj),wp) ! avoid truncation error |
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388 | ! |
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389 | IF(lwp) THEN |
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390 | WRITE(numout,*) ' *** Info used values : ' |
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391 | WRITE(numout,*) ' date ndastp : ', ndastp |
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392 | WRITE(numout,*) ' number of elapsed days since the begining of run : ', adatrj |
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393 | WRITE(numout,*) ' nn_time0 : ',nn_time0 |
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394 | WRITE(numout,*) |
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395 | ENDIF |
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396 | ! |
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397 | ELSEIF( TRIM(cdrw) == 'WRITE' ) THEN |
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398 | ! |
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399 | IF( kt == nitrst ) THEN |
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400 | IF(lwp) WRITE(numout,*) |
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401 | IF(lwp) WRITE(numout,*) 'rst_write : write oce restart file kt =', kt |
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402 | IF(lwp) WRITE(numout,*) '~~~~~~~' |
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403 | ENDIF |
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404 | ! calendar control |
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405 | IF( lwxios ) CALL iom_swap( cwxios_context ) |
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406 | CALL iom_rstput( kt, nitrst, numrow, 'kt' , REAL( kt , wp) , ldxios = lwxios ) ! time-step |
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407 | CALL iom_rstput( kt, nitrst, numrow, 'ndastp' , REAL( ndastp, wp) , ldxios = lwxios ) ! date |
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408 | CALL iom_rstput( kt, nitrst, numrow, 'adatrj' , adatrj , ldxios = lwxios ) ! number of elapsed days since |
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409 | ! ! the begining of the run [s] |
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410 | CALL iom_rstput( kt, nitrst, numrow, 'ntime' , REAL( nn_time0, wp), ldxios = lwxios ) ! time |
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411 | IF( lwxios ) CALL iom_swap( cxios_context ) |
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412 | ENDIF |
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413 | ! |
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414 | END SUBROUTINE day_rst |
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415 | |
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416 | !!====================================================================== |
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417 | END MODULE daymod |
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