| 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 | !! 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 | !!---------------------------------------------------------------------- |
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| 14 | |
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| 15 | !!---------------------------------------------------------------------- |
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| 16 | !! day : calendar |
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| 17 | !! |
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| 18 | !! ------------------------------- |
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| 19 | !! ----------- WARNING ----------- |
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| 20 | !! |
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| 21 | !! we suppose that the time step is deviding the number of second of in a day |
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| 22 | !! ---> MOD( rday, rdttra(1) ) == 0 |
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| 23 | !! |
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| 24 | !! ----------- WARNING ----------- |
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| 25 | !! ------------------------------- |
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| 26 | !! |
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| 27 | !!---------------------------------------------------------------------- |
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| 28 | USE dom_oce ! ocean space and time domain |
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| 29 | USE phycst ! physical constants |
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| 30 | USE in_out_manager ! I/O manager |
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| 31 | USE ioipsl, ONLY : ymds2ju ! for calendar |
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| 32 | USE prtctl ! Print control |
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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 | |
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| 40 | INTEGER :: nsecd, nsecd05, ndt, ndt05 |
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| 41 | |
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| 42 | !!---------------------------------------------------------------------- |
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| 43 | !! NEMO/OPA 3.2 , LOCEAN-IPSL (2009) |
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| 44 | !! $Id: daymod.F90 1748 2009-11-23 10:51:20Z cetlod $ |
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| 45 | !! Software governed by the CeCILL licence (modipsl/doc/NEMO_CeCILL.txt) |
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| 46 | !!---------------------------------------------------------------------- |
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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 | |
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| 68 | ! all calendar staff is based on the fact that MOD( rday, rdttra(1) ) == 0 |
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| 69 | IF( MOD( rday , rdttra(1) ) /= 0. ) CALL ctl_stop( 'the time step must devide the number of second of in a day' ) |
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| 70 | IF( MOD( rday , 2. ) /= 0. ) CALL ctl_stop( 'the number of second of in a day must be an even number' ) |
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| 71 | IF( MOD( rdttra(1), 2. ) /= 0. ) CALL ctl_stop( 'the time step (in second) must be an even number' ) |
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| 72 | nsecd = NINT(rday ) |
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| 73 | nsecd05 = NINT(0.5 * rday ) |
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| 74 | ndt = NINT( rdttra(1)) |
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| 75 | ndt05 = NINT(0.5 * rdttra(1)) |
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| 76 | |
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| 77 | |
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| 78 | ! set the calandar from ndastp (read in restart file and namelist) |
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| 79 | |
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| 80 | nyear = ndastp / 10000 |
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| 81 | nmonth = ( ndastp - (nyear * 10000) ) / 100 |
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| 82 | nday = ndastp - (nyear * 10000) - ( nmonth * 100 ) |
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| 83 | |
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| 84 | CALL ymds2ju( nyear, nmonth, nday, 0.0, fjulday ) ! we assume that we start run at 00:00 |
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| 85 | IF( ABS(fjulday - REAL(NINT(fjulday),wp)) < 0.1 / rday ) fjulday = REAL(NINT(fjulday),wp) ! avoid truncation error |
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| 86 | fjulday = fjulday + 1. ! move back to the day at nit000 (and not at nit000 - 1) |
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| 87 | |
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| 88 | nsec1jan000 = 0 |
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| 89 | CALL day_mth |
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| 90 | |
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| 91 | IF ( nday == 0 ) THEN ! for ex if ndastp = ndate0 - 1 |
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| 92 | nmonth = nmonth - 1 |
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| 93 | nday = nmonth_len(nmonth) |
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| 94 | ENDIF |
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| 95 | IF ( nmonth == 0 ) THEN ! go at the end of previous year |
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| 96 | nmonth = 12 |
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| 97 | nyear = nyear - 1 |
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| 98 | nsec1jan000 = nsec1jan000 - nsecd * nyear_len(0) |
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| 99 | IF( nleapy == 1 ) CALL day_mth |
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| 100 | ENDIF |
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| 101 | |
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| 102 | ! day since january 1st |
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| 103 | nday_year = nday + SUM( nmonth_len(1:nmonth - 1) ) |
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| 104 | |
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| 105 | ! number of seconds since the beginning of current year/month at the middle of the time-step |
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| 106 | nsec_year = nday_year * nsecd - ndt05 ! 1 time step before the middle of the first time step |
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| 107 | nsec_month = nday * nsecd - ndt05 ! because day will be called at the beginning of step |
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| 108 | nsec_day = nsecd - ndt05 |
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| 109 | |
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| 110 | ! control print |
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| 111 | IF(lwp) WRITE(numout,'(a,i6,a,i2,a,i2,a,i6)')' ==============>> 1/2 time step before the start of the run DATE Y/M/D = ', & |
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| 112 | & nyear, '/', nmonth, '/', nday, ' nsec_day:', nsec_day |
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| 113 | |
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| 114 | ! Up to now, calendar parameters are related to the end of previous run (nit000-1) |
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| 115 | ! call day to set the calendar parameters at the begining of the current simulaton. needed by iom_init |
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| 116 | CALL day( nit000 ) |
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| 117 | |
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| 118 | |
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| 119 | END SUBROUTINE day_init |
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| 120 | |
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| 121 | |
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| 122 | SUBROUTINE day_mth |
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| 123 | !!---------------------------------------------------------------------- |
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| 124 | !! *** ROUTINE day_init *** |
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| 125 | !! |
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| 126 | !! ** Purpose : calendar values related to the months |
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| 127 | !! |
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| 128 | !! ** Action : - nmonth_len : length in days of the months of the current year |
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| 129 | !! - nyear_len : length in days of the previous/current year |
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| 130 | !! - nmonth_half : second since the beginning of the year and the halft of the months |
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| 131 | !! - nmonth_end : second since the beginning of the year and the end of the months |
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| 132 | !!---------------------------------------------------------------------- |
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| 133 | INTEGER :: jm ! dummy loop indice |
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| 134 | !!---------------------------------------------------------------------- |
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| 135 | |
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| 136 | ! length of the month of the current year (from nleapy, read in namelist) |
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| 137 | IF ( nleapy < 2 ) THEN |
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| 138 | nmonth_len(:) = (/ 31, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 31 /) |
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| 139 | nyear_len(:) = 365 |
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| 140 | IF ( nleapy == 1 ) THEN ! we are using calandar with leap years |
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| 141 | IF ( MOD(nyear-1, 4) == 0 .AND. ( MOD(nyear-1, 400) == 0 .OR. MOD(nyear-1, 100) /= 0 ) ) THEN |
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| 142 | nyear_len(0) = 366 |
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| 143 | ENDIF |
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| 144 | IF ( MOD(nyear, 4) == 0 .AND. ( MOD(nyear, 400) == 0 .OR. MOD(nyear, 100) /= 0 ) ) THEN |
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| 145 | nmonth_len(2) = 29 |
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| 146 | nyear_len(1) = 366 |
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| 147 | ENDIF |
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| 148 | ENDIF |
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| 149 | ELSE |
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| 150 | nmonth_len(:) = nleapy ! all months with nleapy days per year |
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| 151 | nyear_len(:) = 12 * nleapy |
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| 152 | ENDIF |
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| 153 | |
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| 154 | ! half month in second since the begining of the year: |
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| 155 | ! time since Jan 1st 0 1 2 ... 11 12 13 |
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| 156 | ! ---------*--|--*--|--*--| ... |--*--|--*--|--*--|-------------------------------------- |
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| 157 | ! <---> <---> <---> ... <---> <---> <---> |
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| 158 | ! month number 0 1 2 ... 11 12 13 |
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| 159 | ! |
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| 160 | ! nmonth_half(jm) = rday * REAL( 0.5 * nmonth_len(jm) + SUM(nmonth_len(1:jm-1)) ) |
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| 161 | nmonth_half(0) = - nsecd05 * nmonth_len(0) |
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| 162 | DO jm = 1, 13 |
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| 163 | nmonth_half(jm) = nmonth_half(jm-1) + nsecd05 * ( nmonth_len(jm-1) + nmonth_len(jm) ) |
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| 164 | END DO |
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| 165 | |
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| 166 | nmonth_end(0) = 0 |
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| 167 | DO jm = 1, 13 |
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| 168 | nmonth_end(jm) = nmonth_end(jm-1) + nsecd * nmonth_len(jm) |
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| 169 | END DO |
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| 170 | ! |
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| 171 | END SUBROUTINE |
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| 172 | |
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| 173 | |
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| 174 | SUBROUTINE day( kt ) |
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| 175 | !!---------------------------------------------------------------------- |
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| 176 | !! *** ROUTINE day *** |
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| 177 | !! |
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| 178 | !! ** Purpose : Compute the date with a day iteration IF necessary. |
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| 179 | !! |
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| 180 | !! ** Method : - ??? |
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| 181 | !! |
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| 182 | !! ** Action : - nyear : current year |
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| 183 | !! - nmonth : current month of the year nyear |
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| 184 | !! - nday : current day of the month nmonth |
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| 185 | !! - nday_year : current day of the year nyear |
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| 186 | !! - ndastp : = nyear*10000 + nmonth*100 + nday |
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| 187 | !! - adatrj : date in days since the beginning of the run |
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| 188 | !! - nsec_year : current time of the year (in second since 00h, jan 1st) |
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| 189 | !!---------------------------------------------------------------------- |
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| 190 | INTEGER, INTENT(in) :: kt ! ocean time-step indices |
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| 191 | ! |
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| 192 | CHARACTER (len=25) :: charout |
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| 193 | REAL(wp) :: zprec ! fraction of day corresponding to 0.1 second |
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| 194 | !!---------------------------------------------------------------------- |
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| 195 | zprec = 0.1 / rday |
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| 196 | ! ! New time-step |
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| 197 | nsec_year = nsec_year + ndt |
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| 198 | nsec_month = nsec_month + ndt |
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| 199 | nsec_day = nsec_day + ndt |
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| 200 | adatrj = adatrj + rdttra(1) / rday |
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| 201 | fjulday = fjulday + rdttra(1) / rday |
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| 202 | IF( ABS(fjulday - REAL(NINT(fjulday),wp)) < zprec ) fjulday = REAL(NINT(fjulday),wp) ! avoid truncation error |
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| 203 | IF( ABS(adatrj - REAL(NINT(adatrj ),wp)) < zprec ) adatrj = REAL(NINT(adatrj ),wp) ! avoid truncation error |
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| 204 | |
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| 205 | IF( nsec_day > nsecd ) THEN ! NEW day |
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| 206 | ! |
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| 207 | nday = nday + 1 |
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| 208 | nday_year = nday_year + 1 |
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| 209 | nsec_day = ndt05 |
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| 210 | ! |
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| 211 | IF( nday == nmonth_len(nmonth) + 1 ) THEN ! NEW month |
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| 212 | nday = 1 |
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| 213 | nmonth = nmonth + 1 |
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| 214 | nsec_month = ndt05 |
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| 215 | IF( nmonth == 13 ) THEN ! NEW year |
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| 216 | nyear = nyear + 1 |
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| 217 | nmonth = 1 |
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| 218 | nday_year = 1 |
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| 219 | nsec_year = ndt05 |
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| 220 | nsec1jan000 = nsec1jan000 + nsecd * nyear_len(1) |
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| 221 | IF( nleapy == 1 ) CALL day_mth |
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| 222 | ENDIF |
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| 223 | ENDIF |
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| 224 | ! |
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| 225 | ndastp = nyear * 10000 + nmonth * 100 + nday ! NEW date |
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| 226 | ! |
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| 227 | 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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| 228 | & ' New day, DATE Y/M/D = ', nyear, '/', nmonth, '/', nday, ' nday_year = ', nday_year |
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| 229 | IF(lwp) WRITE(numout,'(a,i8,a,i7,a,i5)') ' nsec_year = ', nsec_year, & |
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| 230 | & ' nsec_month = ', nsec_month, ' nsec_day = ', nsec_day |
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| 231 | ENDIF |
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| 232 | |
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| 233 | IF(ln_ctl) THEN |
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| 234 | WRITE(charout,FMT="('kt =', I4,' d/m/y =',I2,I2,I4)") kt, nday, nmonth, nyear |
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| 235 | CALL prt_ctl_info(charout) |
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| 236 | ENDIF |
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| 237 | |
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| 238 | END SUBROUTINE day |
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| 239 | |
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| 240 | !!====================================================================== |
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| 241 | END MODULE daymod |
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