New URL for NEMO forge!   http://forge.nemo-ocean.eu

Since March 2022 along with NEMO 4.2 release, the code development moved to a self-hosted GitLab.
This present forge is now archived and remained online for history.
greg2jul.h90 in branches/UKMO/dev_r5107_eorca025_closea/NEMOGCM/NEMO/OPA_SRC/OBS – NEMO

source: branches/UKMO/dev_r5107_eorca025_closea/NEMOGCM/NEMO/OPA_SRC/OBS/greg2jul.h90 @ 5307

Last change on this file since 5307 was 5307, checked in by davestorkey, 9 years ago

UKMO dev_r5107_eorca025_closea branch: remove SVN keyword updating
and clear SVN keyword information.

File size: 2.6 KB
Line 
1   SUBROUTINE greg2jul( ksec, kmin, khour, kday, kmonth, kyear, pjulian, &
2      &                 krefdate )
3      !!-----------------------------------------------------------------------
4      !!
5      !!                     ***  ROUTINE greg2jul  ***
6      !!
7      !! ** Purpose : Produce the time relative to the current date and time.
8      !!
9      !! ** Method  : The units are days, so hours and minutes transform to
10      !!              fractions of a day.
11      !!
12      !!              Reference date : 19500101
13      !! ** Action  :
14      !!
15      !! History :
16      !!      ! 06-04  (A. Vidard) Original
17      !!      ! 06-04  (A. Vidard) Reformatted
18      !!      ! 06-10  (A. Weaver) Cleanup
19      !!-----------------------------------------------------------------------
20
21      ! * Arguments
22      INTEGER, INTENT(IN) :: &
23         & ksec,   &
24         & kmin,   &
25         & khour,  &
26         & kday,   &
27         & kmonth, &
28         & kyear
29      REAL(KIND=dp), INTENT(OUT) :: &
30         & pjulian
31      INTEGER, INTENT(IN), OPTIONAL :: &
32         & krefdate
33
34      !! * Local declarations
35      INTEGER, PARAMETER :: &
36         & jpgreg = 15 + 31 * ( 10 + 12 * 1582 ), &     ! Gregorian calendar introduction date
37         & jporef = 2433283,                      &     ! Julian reference date: 19500101
38         & jparef = 2415021,                      &     ! Julian reference date: 19000101
39         & jpgref = 2299161                             ! Julian reference date start of Gregorian calender
40      INTEGER :: &
41         & ija,     &
42         & ijy,     &
43         & ijm,     &
44         & ijultmp, &
45         & ijyear,  &
46         & iref
47      CHARACTER(len=200) :: &
48         & cerr
49
50      IF ( PRESENT( krefdate ) ) THEN
51         SELECT CASE ( krefdate )
52
53         CASE( 0 )
54            iref = jpgref
55
56         CASE( 19500101 )
57            iref = jporef
58
59         CASE( 19000101 )
60            iref = jparef
61
62         CASE DEFAULT
63            WRITE(cerr,'(A,I8.8)')'greg2jul: Unknown krefdate:', krefdate
64            CALL ctl_stop( cerr )
65
66         END SELECT
67
68      ELSE
69         iref = jporef
70      ENDIF
71
72      ! Main computation
73      ijyear = kyear
74      IF ( ijyear < 0 ) ijyear = ijyear + 1
75      IF ( kmonth > 2 ) THEN
76    ijy = ijyear
77    ijm = kmonth + 1
78      ELSE
79    ijy = ijyear  - 1
80    ijm = kmonth + 13
81      ENDIF
82      ijultmp = INT( 365.25 * ijy ) + INT( 30.6001 * ijm ) + kday + 1720995
83      IF ( kday + 31 * ( kmonth + 12 * ijyear ) >= jpgreg ) THEN
84    ija = INT( 0.01 * ijy )
85    ijultmp = ijultmp + 2 - ija + INT( 0.25 * ija )
86      ENDIF
87      pjulian = ( ijultmp - iref ) + ( ( 60 * khour + kmin ) * 60 + ksec ) / 86400.
88
89   END SUBROUTINE greg2jul
Note: See TracBrowser for help on using the repository browser.