| 1 |
module fxysinus_m |
| 2 |
|
| 3 |
IMPLICIT NONE |
| 4 |
|
| 5 |
private |
| 6 |
public fxysinus |
| 7 |
|
| 8 |
contains |
| 9 |
|
| 10 |
SUBROUTINE fxysinus(rlatu, yprimu, rlatv, yprimv, rlatu1, yprimu1, rlatu2, & |
| 11 |
yprimu2, rlonu, xprimu, rlonv, xprimv, rlonm025, xprimm025, rlonp025, & |
| 12 |
xprimp025) |
| 13 |
|
| 14 |
! From LMDZ4/libf/dyn3d/fxysinus.F, version 1.1.1.1, 2004/05/19 12:53:06 |
| 15 |
! and LMDZ4/libf/grid/fxy_sin.h, v 1.1.1.1, 2004/05/19 12:53:05 |
| 16 |
|
| 17 |
! Author: P. Le Van |
| 18 |
|
| 19 |
! Calcul des longitudes et des latitudes pour une fonction f(x, y) |
| 20 |
! avec y = Arcsin(j). |
| 21 |
|
| 22 |
USE dimens_m, only: iim, jjm |
| 23 |
USE nr_util, ONLY: pi |
| 24 |
|
| 25 |
INTEGER i, j |
| 26 |
|
| 27 |
REAL, intent(out):: rlatu(:), yprimu(:) ! (jjp1) |
| 28 |
REAL, intent(out):: rlatv(:), yprimv(:) ! (jjm) |
| 29 |
REAL, intent(out):: rlatu1(:) ! (jjm) |
| 30 |
real, intent(out):: yprimu1(:), rlatu2(:), yprimu2(:) ! (jjm) |
| 31 |
REAL, intent(out):: rlonu(:), xprimu(:), rlonv(:), xprimv(:) ! (iip1) |
| 32 |
REAL, intent(out):: rlonm025(:) ! (iip1) |
| 33 |
real, intent(out):: xprimm025(:), rlonp025(:), xprimp025(:) ! (iip1) |
| 34 |
|
| 35 |
! Local: |
| 36 |
real fxprim |
| 37 |
|
| 38 |
!----------------------------------------------------------------------- |
| 39 |
|
| 40 |
fxprim = 2. * pi / iim |
| 41 |
|
| 42 |
! Calcul des latitudes et de y' |
| 43 |
|
| 44 |
forall(j = 1: jjm + 1) |
| 45 |
rlatu(j) = fy(real(j)) |
| 46 |
yprimu(j) = fyprim(real(j)) |
| 47 |
END forall |
| 48 |
|
| 49 |
forall(j = 1: jjm) |
| 50 |
rlatv(j) = fy(real(j) + 0.5) |
| 51 |
rlatu1(j) = fy(real(j) + 0.25) |
| 52 |
rlatu2(j) = fy(real(j) + 0.75) |
| 53 |
|
| 54 |
yprimv(j) = fyprim(real(j) + 0.5) |
| 55 |
yprimu1(j) = fyprim(real(j) + 0.25) |
| 56 |
yprimu2(j) = fyprim(real(j) + 0.75) |
| 57 |
END forall |
| 58 |
|
| 59 |
! Calcul des longitudes et de x' |
| 60 |
forall(i = 1: iim + 1) |
| 61 |
rlonv(i) = fx(real(i)) |
| 62 |
rlonu(i) = fx(real(i) + 0.5) |
| 63 |
rlonm025(i) = fx(real(i) - 0.25) |
| 64 |
rlonp025(i) = fx(real(i) + 0.25) |
| 65 |
|
| 66 |
xprimv(i) = fxprim |
| 67 |
xprimu(i) = fxprim |
| 68 |
xprimm025(i) = fxprim |
| 69 |
xprimp025(i) = fxprim |
| 70 |
END forall |
| 71 |
|
| 72 |
END SUBROUTINE fxysinus |
| 73 |
|
| 74 |
! Fonctions à changer éventuellement, selon x(x) et y(y) choisis. |
| 75 |
! Ici, on a l'application particulière suivante : |
| 76 |
|
| 77 |
! x = 2 * pi / iim * X |
| 78 |
! y = pi / jjm * Y |
| 79 |
|
| 80 |
pure REAL function fy(rj) |
| 81 |
USE dimens_m, only: jjm |
| 82 |
REAL, intent(in):: rj |
| 83 |
fy = asin(1. + 2. * ((1. - rj) / jjm)) |
| 84 |
end function fy |
| 85 |
|
| 86 |
pure real function fx(ri) |
| 87 |
USE dimens_m, only: iim |
| 88 |
USE nr_util, ONLY: pi |
| 89 |
REAL, intent(in):: ri |
| 90 |
fx = 2.*pi/real(iim)*(ri-0.5*real(iim)-1.) |
| 91 |
end function fx |
| 92 |
|
| 93 |
pure real function fyprim(rj) |
| 94 |
USE dimens_m, only: jjm |
| 95 |
REAL, intent(in):: rj |
| 96 |
fyprim = 1./sqrt((rj-1.)*(jjm + 1.-rj)) |
| 97 |
end function fyprim |
| 98 |
|
| 99 |
end module fxysinus_m |
Parent Directory
| 
Revision Log