source:
LMDZ4/tags/Merge_v3_Yann/libf/dyn3dpar/nxgradst.F
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1 | ! |
2 | ! $Header$ |
3 | ! |
4 | SUBROUTINE nxgradst (klevel,rot, x, y ) |
5 | c |
6 | IMPLICIT NONE |
7 | c Auteur : P. Le Van |
8 | c |
9 | c ******************************************************************** |
10 | c calcul du gradient tourne de pi/2 du rotationnel du vect.v |
11 | c ******************************************************************** |
12 | c rot est un argument d'entree pour le s-prog |
13 | c x et y sont des arguments de sortie pour le s-prog |
14 | c |
15 | #include "dimensions.h" |
16 | #include "paramet.h" |
17 | #include "comgeom.h" |
18 | |
19 | INTEGER klevel |
20 | REAL rot( ip1jm,klevel ),x( ip1jmp1,klevel ),y(ip1jm,klevel ) |
21 | INTEGER l,ij |
22 | c |
23 | DO 10 l = 1,klevel |
24 | c |
25 | DO 1 ij = 2, ip1jm |
26 | y(ij,l)=( rot(ij,l) - rot(ij-1,l)) |
27 | 1 CONTINUE |
28 | c |
29 | c ..... correction pour y ( 1,j,l ) ...... |
30 | c |
31 | c .... y(1,j,l)= y(iip1,j,l) .... |
32 | |
33 | DO 2 ij = 1, ip1jm, iip1 |
34 | y( ij,l ) = y( ij +iim,l ) |
35 | 2 CONTINUE |
36 | c |
37 | DO 4 ij = iip2,ip1jm |
38 | x(ij,l)= rot(ij,l)-rot(ij-iip1,l) |
39 | 4 CONTINUE |
40 | DO 6 ij = 1,iip1 |
41 | x( ij ,l ) = 0. |
42 | x( ij +ip1jm,l ) = 0. |
43 | 6 CONTINUE |
44 | c |
45 | 10 CONTINUE |
46 | RETURN |
47 | END |
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