| 1 | SUBROUTINE massbar(masse,massebx,masseby) |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------- |
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| 4 | ! Authors: P. Le Van , Fr. Hourdin. |
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| 5 | !------------------------------------------------------------------------------- |
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| 6 | ! Purpose: Compute air mass mean along X and Y in each cell. |
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| 7 | ! See iniconst for more details. |
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| 8 | USE lmdz_comgeom |
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| 9 | |
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| 10 | USE lmdz_dimensions, ONLY: iim, jjm, llm, ndm |
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| 11 | USE lmdz_paramet |
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| 12 | IMPLICIT NONE |
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| 13 | |
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| 14 | |
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| 15 | !=============================================================================== |
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| 16 | ! Arguments: |
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| 17 | REAL, INTENT(IN) :: masse (ip1jmp1,llm) |
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| 18 | REAL, INTENT(OUT) :: massebx(ip1jmp1,llm) |
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| 19 | REAL, INTENT(OUT) :: masseby(ip1jm ,llm) |
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| 20 | !------------------------------------------------------------------------------- |
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| 21 | ! Method used. Each scalar point is associated to 4 area coefficients: |
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| 22 | ! * alpha1(i,j) at point ( i+1/4,j-1/4 ) |
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| 23 | ! * alpha2(i,j) at point ( i+1/4,j+1/4 ) |
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| 24 | ! * alpha3(i,j) at point ( i-1/4,j+1/4 ) |
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| 25 | ! * alpha4(i,j) at point ( i-1/4,j-1/4 ) |
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| 26 | ! where alpha1(i,j) = aire(i+1/4,j-1/4)/ aire(i,j) |
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| 27 | |
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| 28 | ! alpha4 . . alpha1 . alpha4 |
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| 29 | ! (i,j) (i,j) (i+1,j) |
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| 30 | |
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| 31 | ! P . U . . P |
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| 32 | ! (i,j) (i,j) (i+1,j) |
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| 33 | |
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| 34 | ! alpha3 . . alpha2 .alpha3 |
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| 35 | ! (i,j) (i,j) (i+1,j) |
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| 36 | |
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| 37 | ! V . Z . . V |
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| 38 | ! (i,j) |
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| 39 | |
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| 40 | ! alpha4 . . alpha1 .alpha4 |
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| 41 | ! (i,j+1) (i,j+1) (i+1,j+1) |
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| 42 | |
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| 43 | ! P . U . . P |
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| 44 | ! (i,j+1) (i+1,j+1) |
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| 45 | |
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| 46 | |
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| 47 | ! massebx(i,j) = masse(i ,j) * ( alpha1(i ,j) + alpha2(i,j)) + |
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| 48 | ! masse(i+1,j) * ( alpha3(i+1,j) + alpha4(i+1,j) ) |
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| 49 | ! localized at point ... U (i,j) ... |
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| 50 | |
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| 51 | ! masseby(i,j) = masse(i,j ) * ( alpha2(i,j ) + alpha3(i,j ) + |
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| 52 | ! masse(i,j+1) * ( alpha1(i,j+1) + alpha4(i,j+1) |
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| 53 | ! localized at point ... V (i,j) ... |
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| 54 | !=============================================================================== |
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| 55 | ! Local variables: |
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| 56 | INTEGER :: ij, l |
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| 57 | !=============================================================================== |
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| 58 | DO l=1,llm |
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| 59 | DO ij=1,ip1jmp1-1 |
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| 60 | massebx(ij,l)=masse(ij,l)*alpha1p2(ij)+masse(ij+1 ,l)*alpha3p4(ij+1) |
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| 61 | END DO |
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| 62 | DO ij=iip1,ip1jmp1,iip1; massebx(ij,l)=massebx(ij-iim,l); END DO |
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| 63 | DO ij=1,ip1jm |
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| 64 | masseby(ij,l)=masse(ij,l)*alpha2p3(ij)+masse(ij+iip1,l)*alpha1p4(ij+iip1) |
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| 65 | END DO |
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| 66 | END DO |
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| 67 | |
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| 68 | END SUBROUTINE massbar |
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| 69 | |
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