[524] | 1 | ! $Header$ |
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[5099] | 2 | |
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[5123] | 3 | SUBROUTINE divergst(klevel, x, y, div) |
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| 4 | USE lmdz_ssum_scopy, ONLY: ssum |
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[5136] | 5 | USE lmdz_comgeom |
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[5123] | 6 | |
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[5105] | 7 | IMPLICIT NONE |
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| 8 | ! |
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| 9 | ! P. Le Van |
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| 10 | ! |
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| 11 | ! ****************************************************************** |
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| 12 | ! ... calcule la divergence a tous les niveaux d'1 vecteur de compos. x et y... |
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| 13 | ! x et y etant des composantes contravariantes ... |
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| 14 | ! **************************************************************** |
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| 15 | ! x et y sont des arguments d'entree pour le s-prog |
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| 16 | ! div est un argument de sortie pour le s-prog |
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| 17 | ! |
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| 18 | ! |
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| 19 | ! ------------------------------------------------------------------- |
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| 20 | ! |
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[5123] | 21 | |
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[5105] | 22 | INCLUDE "dimensions.h" |
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| 23 | INCLUDE "paramet.h" |
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[524] | 24 | |
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[5105] | 25 | INTEGER :: klevel |
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[5123] | 26 | REAL :: x(ip1jmp1, klevel), y(ip1jm, klevel), div(ip1jmp1, klevel) |
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| 27 | INTEGER :: ij, l, i |
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| 28 | REAL :: aiy1(iip1), aiy2(iip1) |
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| 29 | REAL :: sumypn, sumyps |
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[5105] | 30 | ! |
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| 31 | ! |
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[5123] | 32 | DO l = 1, klevel |
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| 33 | ! |
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| 34 | DO ij = iip2, ip1jm - 1 |
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| 35 | div(ij + 1, l) = x(ij + 1, l) - x(ij, l) + y(ij - iim, l) - y(ij + 1, l) |
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| 36 | END DO |
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| 37 | ! |
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| 38 | ! .... correction pour div( 1,j,l) ...... |
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| 39 | ! .... div(1,j,l)= div(iip1,j,l) .... |
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| 40 | ! |
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| 41 | !DIR$ IVDEP |
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| 42 | DO ij = iip2, ip1jm, iip1 |
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| 43 | div(ij, l) = div(ij + iim, l) |
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| 44 | END DO |
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| 45 | ! |
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| 46 | ! .... calcul aux poles ..... |
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| 47 | ! |
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| 48 | ! |
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| 49 | DO i = 1, iim |
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| 50 | aiy1(i) = y(i, l) |
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| 51 | aiy2(i) = y(i + ip1jmi1, l) |
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| 52 | END DO |
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| 53 | sumypn = SSUM (iim, aiy1, 1) |
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| 54 | sumyps = SSUM (iim, aiy2, 1) |
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| 55 | DO i = 1, iip1 |
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| 56 | div(i, l) = - sumypn / iim |
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| 57 | div(i + ip1jm, l) = sumyps / iim |
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| 58 | END DO |
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| 59 | ! |
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[5105] | 60 | END DO |
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| 61 | RETURN |
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| 62 | END SUBROUTINE divergst |
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