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module conf_dat3d_m |
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IMPLICIT NONE |
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contains |
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SUBROUTINE conf_dat3d(xd, yd, zd, xf, yf, zf, champd) |
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! From dyn3d/conf_dat3d.F, version 1.1.1.1 2004/05/19 12:53:05 |
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! Author : P. Le Van |
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! Ce sous-programme configure le champ de données 3D 'champd' pour |
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! que la longitude varie de - pi à pi, la latitude de pi/2 à |
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! - pi/2 et pour que la coordonnée pression soit décroissante. |
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use nr_util, only: assert_eq, pi |
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REAL, intent(in):: xd(:), yd(:) ! longitudes et latitudes initiales, en rad |
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REAL, intent(in):: zd(:) ! pressure levels, in Pa or hPa |
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REAL, intent(out):: xf(:) ! longitude, in rad, - pi to pi |
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REAL, intent(out):: yf(:) ! latitude, in rad, pi/2 to -pi/2 |
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REAL, intent(out):: zf(:) ! pressure levels, in decreasing order, in Pa |
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REAL, intent(inout):: champd(:, :, :) |
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! Variables locales : |
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INTEGER lons, lats, levs |
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LOGICAL invlon |
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REAL rlatmin, rlatmax, oldxd1 |
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INTEGER i |
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!-------------------------------------- |
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lons = assert_eq(size(xd), size(xf), size(champd, 1), "conf_dat3d lons") |
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lats = assert_eq(size(yd), size(yf), size(champd, 2), "conf_dat3d lats") |
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levs = assert_eq(size(zd), size(zf), size(champd, 3), "conf_dat3d levs") |
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IF (xd(1) >= - pi - 0.5 .AND. xd(lons) <= pi + 0.5) THEN |
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invlon = .FALSE. |
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ELSE IF (xd(1) >= -0.5 .AND. xd(lons) <= 2 * pi+0.5) THEN |
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invlon = .TRUE. |
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ELSE |
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print *, 'Problème sur les longitudes des données' |
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stop 1 |
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ENDIF |
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rlatmin = MIN(yd(1), yd(lats)) |
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rlatmax = MAX(yd(1), yd(lats)) |
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IF (rlatmin < -pi / 2 - 0.5 .or. rlatmax > pi / 2 + 0.5) THEN |
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print *, ' Problème sur les latitudes des données' |
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stop 1 |
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ENDIF |
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xf(:) = xd(:) |
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yf(:) = yd(:) |
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IF (invlon) THEN |
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! On tourne les longitudes pour avoir - pi à pi |
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DO i=1, lons |
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IF (xf(i) > pi) exit |
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ENDDO |
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where (xf > pi) xf = xf - 2 * pi |
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xf = cshift(xf, i - 1) |
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! On tourne les longitudes pour "champd": |
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champd = cshift(champd, i - 1) |
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ENDIF |
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IF (yd(1) < yd(lats)) THEN |
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yf = yf(lats:1:-1) |
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champd = champd(:, lats:1:-1, :) |
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ENDIF |
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oldxd1 = xf(1) |
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forall (i = 1: lons-1) xf(i) = 0.5 * (xf(i) + xf(i+1)) |
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xf(lons) = 0.5 * (xf(lons) + oldxd1 + 2 * pi) |
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forall (i = 1: lats-1) yf(i) = 0.5 * (yf(i) + yf(i+1)) |
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IF (MAX(zd(1), zd(levs)) < 1200.) THEN |
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zf(:) = zd(:) * 100. ! convert from hPa to Pa |
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else |
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zf(:) = zd(:) |
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ENDIF |
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IF (zd(1) < zd(levs)) THEN |
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zf(:) = zf(levs:1:-1) |
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champd(:, :, :) = champd(:, :, levs:1:-1) |
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ENDIF |
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END SUBROUTINE conf_dat3d |
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end module conf_dat3d_m |
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