MODULE daymod !!====================================================================== !! *** MODULE daymod *** !! Ocean : calendar !!===================================================================== !! History : OPA ! 1994-09 (M. Pontaud M. Imbard) Original code !! ! 1997-03 (O. Marti) !! ! 1997-05 (G. Madec) !! ! 1997-08 (M. Imbard) !! NEMO 1.0 ! 2003-09 (G. Madec) F90 + nyear, nmonth, nday !! ! 2004-01 (A.M. Treguier) new calculation based on adatrj !! ! 2006-08 (G. Madec) surface module major update !!---------------------------------------------------------------------- !!---------------------------------------------------------------------- !! day : calendar !! !! ------------------------------- !! ----------- WARNING ----------- !! !! we suppose that the time step is deviding the number of second of in a day !! ---> MOD( rday, rdttra(1) ) == 0 !! !! ----------- WARNING ----------- !! ------------------------------- !! !!---------------------------------------------------------------------- USE dom_oce ! ocean space and time domain USE phycst ! physical constants USE in_out_manager ! I/O manager USE iom ! USE ioipsl, ONLY : ymds2ju ! for calendar USE prtctl ! Print control USE restart ! USE timing ! Timing IMPLICIT NONE PRIVATE PUBLIC day ! called by step.F90 PUBLIC day_init ! called by istate.F90 INTEGER :: nsecd, nsecd05, ndt, ndt05 !!---------------------------------------------------------------------- !! NEMO/OPA 3.3 , NEMO Consortium (2010) !! $Id: daymod.F90 3294 2012-01-28 16:44:18Z rblod $ !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE day_init !!---------------------------------------------------------------------- !! *** ROUTINE day_init *** !! !! ** Purpose : Initialization of the calendar values to their values 1 time step before nit000 !! because day will be called at the beginning of step !! !! ** Action : - nyear : current year !! - nmonth : current month of the year nyear !! - nday : current day of the month nmonth !! - nday_year : current day of the year nyear !! - nsec_year : current time step counted in second since 00h jan 1st of the current year !! - nsec_month : current time step counted in second since 00h 1st day of the current month !! - nsec_day : current time step counted in second since 00h of the current day !! - nsec1jan000 : second since Jan. 1st 00h of nit000 year and Jan. 1st 00h of the current year !! - nmonth_len, nyear_len, nmonth_half, nmonth_end through day_mth !!---------------------------------------------------------------------- INTEGER :: inbday, idweek REAL(wp) :: zjul !!---------------------------------------------------------------------- ! ! all calendar staff is based on the fact that MOD( rday, rdttra(1) ) == 0 IF( MOD( rday , rdttra(1) ) /= 0. ) CALL ctl_stop( 'the time step must devide the number of second of in a day' ) IF( MOD( rday , 2. ) /= 0. ) CALL ctl_stop( 'the number of second of in a day must be an even number' ) IF( MOD( rdttra(1), 2. ) /= 0. ) CALL ctl_stop( 'the time step (in second) must be an even number' ) nsecd = NINT(rday ) nsecd05 = NINT(0.5 * rday ) ndt = NINT( rdttra(1)) ndt05 = NINT(0.5 * rdttra(1)) ! parameters corresponding to nit000 - 1 (as we start the step loop with a call to day) ndastp = ndate0 - 1 ! ndate0 read in the namelist in dom_nam, we assume that we start run at 00:00 adatrj = ( REAL( nit000-1, wp ) * rdttra(1) ) / rday IF( ABS(adatrj - REAL(NINT(adatrj),wp)) < 0.1 / rday ) adatrj = REAL(NINT(adatrj),wp) ! avoid truncation error ! IF(lwp) THEN WRITE(numout,*) ' *** Info used values : ' WRITE(numout,*) ' date ndastp : ', ndastp WRITE(numout,*) ' number of elapsed days since the begining of run : ', adatrj WRITE(numout,*) ENDIF ! set the calendar from ndastp (read in restart file and namelist) nyear = ndastp / 10000 nmonth = ( ndastp - (nyear * 10000) ) / 100 nday = ndastp - (nyear * 10000) - ( nmonth * 100 ) CALL ymds2ju( nyear, nmonth, nday, 0.0, fjulday ) ! we assume that we start run at 00:00 IF( ABS(fjulday - REAL(NINT(fjulday),wp)) < 0.1 / rday ) fjulday = REAL(NINT(fjulday),wp) ! avoid truncation error fjulday = fjulday + 1. ! move back to the day at nit000 (and not at nit000 - 1) nsec1jan000 = 0 CALL day_mth IF ( nday == 0 ) THEN ! for ex if ndastp = ndate0 - 1 nmonth = nmonth - 1 nday = nmonth_len(nmonth) ENDIF IF ( nmonth == 0 ) THEN ! go at the end of previous year nmonth = 12 nyear = nyear - 1 nsec1jan000 = nsec1jan000 - nsecd * nyear_len(0) IF( nleapy == 1 ) CALL day_mth ENDIF ! day since january 1st nday_year = nday + SUM( nmonth_len(1:nmonth - 1) ) !compute number of days between last monday and today CALL ymds2ju( 1900, 01, 01, 0.0, zjul ) ! compute julian day value of 01.01.1900 (our reference that was a Monday) inbday = NINT(fjulday - zjul) ! compute nb day between 01.01.1900 and current day idweek = MOD(inbday, 7) ! compute nb day between last monday and current day ! number of seconds since the beginning of current year/month/week/day at the middle of the time-step nsec_year = nday_year * nsecd - ndt05 ! 1 time step before the middle of the first time step nsec_month = nday * nsecd - ndt05 ! because day will be called at the beginning of step nsec_week = idweek * nsecd - ndt05 nsec_day = nsecd - ndt05 ! control print 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 = ', & & nyear, '/', nmonth, '/', nday, ' nsec_day:', nsec_day, ' nsec_week:', nsec_week ! Up to now, calendar parameters are related to the end of previous run (nit000-1) ! call day to set the calendar parameters at the begining of the current simulaton. needed by iom_init CALL day( nit000 ) ! END SUBROUTINE day_init SUBROUTINE day_mth !!---------------------------------------------------------------------- !! *** ROUTINE day_init *** !! !! ** Purpose : calendar values related to the months !! !! ** Action : - nmonth_len : length in days of the months of the current year !! - nyear_len : length in days of the previous/current year !! - nmonth_half : second since the beginning of the year and the halft of the months !! - nmonth_end : second since the beginning of the year and the end of the months !!---------------------------------------------------------------------- INTEGER :: jm ! dummy loop indice !!---------------------------------------------------------------------- ! length of the month of the current year (from nleapy, read in namelist) IF ( nleapy < 2 ) THEN nmonth_len(:) = (/ 31, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 31 /) nyear_len(:) = 365 IF ( nleapy == 1 ) THEN ! we are using calandar with leap years IF ( MOD(nyear-1, 4) == 0 .AND. ( MOD(nyear-1, 400) == 0 .OR. MOD(nyear-1, 100) /= 0 ) ) THEN nyear_len(0) = 366 ENDIF IF ( MOD(nyear , 4) == 0 .AND. ( MOD(nyear , 400) == 0 .OR. MOD(nyear , 100) /= 0 ) ) THEN nmonth_len(2) = 29 nyear_len(1) = 366 ENDIF IF ( MOD(nyear+1, 4) == 0 .AND. ( MOD(nyear+1, 400) == 0 .OR. MOD(nyear+1, 100) /= 0 ) ) THEN nyear_len(2) = 366 ENDIF ENDIF ELSE nmonth_len(:) = nleapy ! all months with nleapy days per year nyear_len(:) = 12 * nleapy ENDIF ! half month in second since the begining of the year: ! time since Jan 1st 0 1 2 ... 11 12 13 ! ---------*--|--*--|--*--| ... |--*--|--*--|--*--|-------------------------------------- ! <---> <---> <---> ... <---> <---> <---> ! month number 0 1 2 ... 11 12 13 ! ! nmonth_half(jm) = rday * REAL( 0.5 * nmonth_len(jm) + SUM(nmonth_len(1:jm-1)) ) nmonth_half(0) = - nsecd05 * nmonth_len(0) DO jm = 1, 13 nmonth_half(jm) = nmonth_half(jm-1) + nsecd05 * ( nmonth_len(jm-1) + nmonth_len(jm) ) END DO nmonth_end(0) = 0 DO jm = 1, 13 nmonth_end(jm) = nmonth_end(jm-1) + nsecd * nmonth_len(jm) END DO ! END SUBROUTINE SUBROUTINE day( kt ) !!---------------------------------------------------------------------- !! *** ROUTINE day *** !! !! ** Purpose : Compute the date with a day iteration IF necessary. !! !! ** Method : - ??? !! !! ** Action : - nyear : current year !! - nmonth : current month of the year nyear !! - nday : current day of the month nmonth !! - nday_year : current day of the year nyear !! - ndastp : = nyear*10000 + nmonth*100 + nday !! - adatrj : date in days since the beginning of the run !! - nsec_year : current time of the year (in second since 00h, jan 1st) !!---------------------------------------------------------------------- INTEGER, INTENT(in) :: kt ! ocean time-step indices ! CHARACTER (len=25) :: charout REAL(wp) :: zprec ! fraction of day corresponding to 0.1 second !!---------------------------------------------------------------------- ! IF( nn_timing == 1 ) CALL timing_start('day') ! zprec = 0.1 / rday ! ! New time-step nsec_year = nsec_year + ndt nsec_month = nsec_month + ndt nsec_week = nsec_week + ndt nsec_day = nsec_day + ndt adatrj = adatrj + rdttra(1) / rday fjulday = fjulday + rdttra(1) / rday IF( ABS(fjulday - REAL(NINT(fjulday),wp)) < zprec ) fjulday = REAL(NINT(fjulday),wp) ! avoid truncation error IF( ABS(adatrj - REAL(NINT(adatrj ),wp)) < zprec ) adatrj = REAL(NINT(adatrj ),wp) ! avoid truncation error IF( nsec_day > nsecd ) THEN ! New day ! nday = nday + 1 nday_year = nday_year + 1 nsec_day = ndt05 ! IF( nday == nmonth_len(nmonth) + 1 ) THEN ! New month nday = 1 nmonth = nmonth + 1 nsec_month = ndt05 IF( nmonth == 13 ) THEN ! New year nyear = nyear + 1 nmonth = 1 nday_year = 1 nsec_year = ndt05 IF( nsec1jan000 >= 2 * (2**30 - nsecd * nyear_len(1) / 2 ) ) THEN ! test integer 4 max value CALL ctl_stop( 'The number of seconds between Jan. 1st 00h of nit000 year and Jan. 1st 00h ', & & 'of the current year is exceeding the INTEGER 4 max VALUE: 2^31-1 -> 68.09 years in seconds', & & 'You must do a restart at higher frequency (or remove this STOP and recompile everything in I8)' ) ENDIF nsec1jan000 = nsec1jan000 + nsecd * nyear_len(1) IF( nleapy == 1 ) CALL day_mth ENDIF ENDIF ! ndastp = nyear * 10000 + nmonth * 100 + nday ! New date ! !compute first day of the year in julian days CALL ymds2ju( nyear, 01, 01, 0.0, fjulstartyear ) ! IF(lwp) WRITE(numout,'(a,i8,a,i4.4,a,i2.2,a,i2.2,a,i3.3)') '======>> time-step =', kt, & & ' New day, DATE Y/M/D = ', nyear, '/', nmonth, '/', nday, ' nday_year = ', nday_year IF(lwp) WRITE(numout,'(a,i8,a,i7,a,i5)') ' nsec_year = ', nsec_year, & & ' nsec_month = ', nsec_month, ' nsec_day = ', nsec_day, ' nsec_week = ', nsec_week ENDIF IF( nsec_week > 7*nsecd ) nsec_week = ndt05 ! New week IF(ln_ctl) THEN WRITE(charout,FMT="('kt =', I4,' d/m/y =',I2,I2,I4)") kt, nday, nmonth, nyear CALL prt_ctl_info(charout) ENDIF ! since we no longer call rst_opn, need to define nitrst here, used by ice restart routine IF( kt == nit000 ) nitrst = nitend IF( MOD( kt - 1, nstock ) == 0 ) THEN ! we use kt - 1 and not kt - nit000 to keep the same periodicity from the beginning of the experiment nitrst = kt + nstock - 1 ! define the next value of nitrst for restart writing IF( nitrst > nitend ) nitrst = nitend ! make sure we write a restart at the end of the run ENDIF IF( nn_timing == 1 ) CALL timing_stop('day') ! END SUBROUTINE day !!====================================================================== END MODULE daymod