source: LMDZ5/branches/testing/libf/dyn3d_common/massbar.F90 @ 4085

Last change on this file since 4085 was 2408, checked in by Laurent Fairhead, 9 years ago

Merged trunk changes r2298:2396 into testing branch
  • Property copyright set to
    Name of program: LMDZ
    Creation date: 1984
    Version: LMDZ5
    License: CeCILL version 2
    Holder: Laboratoire de m\'et\'eorologie dynamique, CNRS, UMR 8539
    See the license file in the root directory
  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 2.4 KB
RevLine 
[2336]1SUBROUTINE massbar(masse,massebx,masseby)
[524]2!
[2336]3!-------------------------------------------------------------------------------
4! Authors: P. Le Van , Fr. Hourdin.
5!-------------------------------------------------------------------------------
6! Purpose: Compute air mass mean along X and Y in each cell.
7! See iniconst for more details.
8  IMPLICIT NONE
9  include "dimensions.h"
10  include "paramet.h"
11  include "comgeom.h"
12!===============================================================================
13! Arguments:
14  REAL, INTENT(IN)  :: masse  (ip1jmp1,llm)
15  REAL, INTENT(OUT) :: massebx(ip1jmp1,llm)
16  REAL, INTENT(OUT) :: masseby(ip1jm  ,llm)
17!-------------------------------------------------------------------------------
18! Method used. Each scalar point is associated to 4 area coefficients:
19!    * alpha1(i,j) at point ( i+1/4,j-1/4 )
20!    * alpha2(i,j) at point ( i+1/4,j+1/4 )
21!    * alpha3(i,j) at point ( i-1/4,j+1/4 )
22!    * alpha4(i,j) at point ( i-1/4,j-1/4 )
23! where alpha1(i,j) = aire(i+1/4,j-1/4)/ aire(i,j)
[524]24!
[2336]25!   alpha4 .         . alpha1    . alpha4
26!    (i,j)             (i,j)       (i+1,j)
27!
28!             P .        U .          . P
29!           (i,j)       (i,j)         (i+1,j)
30!
31!   alpha3 .         . alpha2    .alpha3
32!    (i,j)              (i,j)     (i+1,j)
33!
34!             V .        Z .          . V
35!           (i,j)
36!
37!   alpha4 .         . alpha1    .alpha4
38!   (i,j+1)            (i,j+1)   (i+1,j+1)
39!
40!             P .        U .          . P
41!          (i,j+1)                    (i+1,j+1)
42!
43!
44!    massebx(i,j) = masse(i  ,j) * ( alpha1(i  ,j) + alpha2(i,j))   +
45!                   masse(i+1,j) * ( alpha3(i+1,j) + alpha4(i+1,j) )
46!     localized at point  ... U (i,j) ...
47!
48!    masseby(i,j) = masse(i,j  ) * ( alpha2(i,j  ) + alpha3(i,j  )  +
49!                   masse(i,j+1) * ( alpha1(i,j+1) + alpha4(i,j+1) 
50!     localized at point  ... V (i,j) ...
51!===============================================================================
52! Local variables:
53  INTEGER :: ij, l
54!===============================================================================
55  DO l=1,llm
56    DO ij=1,ip1jmp1-1
57      massebx(ij,l)=masse(ij,l)*alpha1p2(ij)+masse(ij+1   ,l)*alpha3p4(ij+1)
58    END DO
59    DO ij=iip1,ip1jmp1,iip1; massebx(ij,l)=massebx(ij-iim,l); END DO
60    DO ij=1,ip1jm
61      masseby(ij,l)=masse(ij,l)*alpha2p3(ij)+masse(ij+iip1,l)*alpha1p4(ij+iip1)
62    END DO
63  END DO
[524]64
[2336]65END SUBROUTINE massbar
[524]66
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