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module filtreg_m |
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IMPLICIT NONE |
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contains |
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SUBROUTINE filtreg(champ, nlat, nbniv, ifiltre, iaire, griscal) |
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! From filtrez/filtreg.F, version 1.1.1.1, 2004/05/19 12:53:09 |
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! Author: P. Le Van |
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! Objet : filtre matriciel longitudinal, avec les matrices précalculées |
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! pour l'opérateur filtre. |
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|
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USE dimens_m, ONLY: iim, jjm |
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USE coefils, ONLY: sddu, sddv, unsddu, unsddv |
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use inifilr_m, only: jfiltnu, jfiltnv, jfiltsu, jfiltsv, matriceun, & |
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matriceus, matricevn, matricevs, matrinvn, matrinvs |
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|
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INTEGER, intent(in):: nlat ! nombre de latitudes a filtrer |
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integer, intent(in):: nbniv ! nombre de niveaux verticaux a filtrer |
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|
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REAL, intent(inout):: champ(iim + 1, nlat, nbniv) |
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! en entrée : champ à filtrer, en sortie : champ filtré |
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|
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integer, intent(in):: ifiltre |
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! +1 Transformee directe |
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! -1 Transformee inverse |
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! +2 Filtre directe |
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! -2 Filtre inverse |
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! Variable Intensive |
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! ifiltre = 1 filtre directe |
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! ifiltre =-1 filtre inverse |
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! Variable Extensive |
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! ifiltre = 2 filtre directe |
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! ifiltre =-2 filtre inverse |
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|
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integer, intent(in):: iaire |
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! 1 si champ intensif |
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! 2 si champ extensif (pondere par les aires) |
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|
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LOGICAL, intent(in):: griscal |
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|
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! Variables local to the procedure: |
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|
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INTEGER jdfil1, jdfil2, jffil1, jffil2, jdfil, jffil |
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INTEGER i, j, l, k |
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REAL eignq(iim), sdd1(iim), sdd2(iim) |
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INTEGER hemisph |
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|
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!----------------------------------------------------------- |
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|
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IF (ifiltre==1 .OR. ifiltre==-1) then |
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print *, 'Pas de transformee simple dans cette version' |
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STOP 1 |
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end IF |
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|
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IF (ifiltre==-2 .AND. .NOT. griscal) THEN |
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PRINT *, ' Cette routine ne calcule le filtre inverse que ', & |
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' sur la grille des scalaires !' |
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STOP 1 |
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END IF |
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|
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IF (ifiltre/=2 .AND. ifiltre/=-2) THEN |
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PRINT *, ' Probleme dans filtreg car ifiltre NE 2 et NE -2', & |
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' corriger et repasser !' |
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STOP 1 |
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END IF |
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|
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IF (griscal) THEN |
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IF (nlat /= jjm + 1) THEN |
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PRINT *, 'Erreur dans le dimensionnement du tableau CHAMP a ' & |
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// 'filtrer, sur la grille des scalaires' |
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STOP 1 |
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ELSE |
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IF (iaire==1) THEN |
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sdd1 = sddv |
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sdd2 = unsddv |
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ELSE |
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sdd1 = unsddv |
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sdd2 = sddv |
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END IF |
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|
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jdfil1 = 2 |
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jffil1 = jfiltnu |
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jdfil2 = jfiltsu |
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jffil2 = jjm |
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END IF |
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ELSE |
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IF (nlat /= jjm) THEN |
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PRINT *, 'Erreur dans le dimensionnement du tableau CHAMP a ' & |
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// 'filtrer, sur la grille de V ou de Z' |
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STOP 1 |
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ELSE |
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IF (iaire==1) THEN |
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sdd1 = sddu |
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sdd2 = unsddu |
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ELSE |
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sdd1 = unsddu |
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sdd2 = sddu |
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END IF |
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|
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jdfil1 = 1 |
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jffil1 = jfiltnv |
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jdfil2 = jfiltsv |
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jffil2 = jjm |
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END IF |
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END IF |
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|
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DO hemisph = 1, 2 |
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IF (hemisph==1) THEN |
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jdfil = jdfil1 |
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jffil = jffil1 |
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ELSE |
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jdfil = jdfil2 |
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jffil = jffil2 |
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END IF |
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|
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loop_vertical: DO l = 1, nbniv |
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loop_latitude: DO j = jdfil, jffil |
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DO i = 1, iim |
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champ(i, j, l) = champ(i, j, l)*sdd1(i) |
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END DO |
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|
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IF (hemisph==1) THEN |
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IF (ifiltre==-2) THEN |
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DO k = 1, iim |
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eignq(k) = 0. |
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END DO |
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DO k = 1, iim |
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DO i = 1, iim |
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eignq(k) = eignq(k) + matrinvn(k, i, j)*champ(i, j, l) |
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END DO |
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END DO |
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ELSE IF (griscal) THEN |
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DO k = 1, iim |
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eignq(k) = 0. |
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END DO |
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DO i = 1, iim |
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DO k = 1, iim |
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eignq(k) = eignq(k) + matriceun(k, i, j) & |
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* champ(i, j, l) |
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END DO |
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END DO |
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ELSE |
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DO k = 1, iim |
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eignq(k) = 0. |
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END DO |
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DO i = 1, iim |
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DO k = 1, iim |
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eignq(k) = eignq(k) + matricevn(k, i, j) & |
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* champ(i, j, l) |
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END DO |
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END DO |
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END IF |
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ELSE |
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IF (ifiltre==-2) THEN |
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DO k = 1, iim |
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eignq(k) = 0. |
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END DO |
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DO i = 1, iim |
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DO k = 1, iim |
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eignq(k) = eignq(k) + matrinvs(k, i, j-jfiltsu+1) & |
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*champ(i, j, l) |
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END DO |
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END DO |
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ELSE IF (griscal) THEN |
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DO k = 1, iim |
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eignq(k) = 0. |
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END DO |
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DO i = 1, iim |
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DO k = 1, iim |
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eignq(k) = eignq(k) + matriceus(k, i, j-jfiltsu+1) & |
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*champ(i, j , l) |
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END DO |
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END DO |
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ELSE |
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DO k = 1, iim |
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eignq(k) = 0. |
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END DO |
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DO i = 1, iim |
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DO k = 1, iim |
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eignq(k) = eignq(k) + matricevs(k, i, j-jfiltsv+1) & |
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*champ(i, j , l) |
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END DO |
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END DO |
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END IF |
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END IF |
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|
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IF (ifiltre==2) THEN |
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DO i = 1, iim |
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champ(i, j, l) = (champ(i, j, l)+eignq(i))*sdd2(i) |
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end DO |
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ELSE |
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DO i = 1, iim |
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champ(i, j, l) = (champ(i, j, l)-eignq(i))*sdd2(i) |
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end DO |
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END IF |
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|
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champ(iim + 1, j, l) = champ(1, j, l) |
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END DO loop_latitude |
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END DO loop_vertical |
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end DO |
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|
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END SUBROUTINE filtreg |
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|
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end module filtreg_m |
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