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module pres2lev_m |
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IMPLICIT NONE |
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contains |
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SUBROUTINE pres2lev(varo, varn, po, pn) |
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! From LMDZ4/libf/dyn3d/pres2lev.F, version 1.1.1.1 2004/05/19 12:53:07 |
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|
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! Interpolation lin\'eaire pour passer \`a une nouvelle |
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! discr\'etisation verticale pour les variables de GCM. |
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|
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! Francois Forget (January 1995) |
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|
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REAL, intent(in):: varo(:, :, :) ! (ni, nj, lmo) var in the old grid |
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REAL, intent(out):: varn(:, :, :) ! (ni, nj, lmn)! var in the new grid |
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|
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REAL, intent(in):: po(:) ! (lmo) |
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! pressure levels, old (in monotonic order), in hPa |
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REAL, intent(in):: pn(:, :, :) ! (ni, nj, lmn) pressure levels, new, in Pa |
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|
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! Local: |
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INTEGER lmn ! dimensions nouvelle couches |
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INTEGER ni, nj |
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INTEGER lmo ! dimensions ancienne couches |
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INTEGER i, j |
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REAL zvaro(size(po)) |
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real zpo(size(po)) ! pressure levels, old, in descending order, in hPa |
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INTEGER ln, lo |
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|
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!-------------------------------------------------------------- |
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|
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lmo = size(po) |
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ni = size(varn, 1) |
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nj = size(varn, 2) |
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lmn = size(varn, 3) |
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|
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DO i = 1, ni |
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DO j = 1, nj |
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if (po(1) < po(2)) then |
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! Inversion de l'ordre des niveaux verticaux : |
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zpo = po(lmo:1:- 1) |
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zvaro = varo(i, j, lmo:1:- 1) |
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else |
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zpo = po |
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zvaro = varo(i, j, :) |
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end if |
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|
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DO ln = 1, lmn |
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IF (pn(i, j, ln) >= zpo(1)) THEN |
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varn(i, j, ln) = zvaro(1) |
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ELSE IF (pn(i, j, ln) <= zpo(lmo)) THEN |
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varn(i, j, ln) = zvaro(lmo) |
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ELSE |
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DO lo = 1, lmo - 1 |
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IF ((pn(i, j, ln) <= zpo(lo)) & |
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.AND. (pn(i, j, ln) > zpo(lo + 1))) THEN |
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varn(i, j, ln) = zvaro(lo) + (pn(i, j, ln) - zpo(lo)) & |
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/ (zpo(lo + 1) - zpo(lo)) * (zvaro(lo + 1) & |
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- zvaro(lo)) |
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END IF |
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END DO |
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END IF |
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END DO |
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END DO |
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END DO |
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|
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END SUBROUTINE pres2lev |
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|
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end module pres2lev_m |
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