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module filtreg_m |
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IMPLICIT NONE |
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|
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contains |
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SUBROUTINE filtreg(champ, direct, intensive) |
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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 pr\'ecalcul\'ees |
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! pour l'op\'erateur filtre. |
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|
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USE coefils, ONLY: sddu, sddv, unsddu, unsddv |
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USE dimens_m, ONLY: iim, jjm |
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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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use nr_util, only: assert |
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|
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REAL, intent(inout):: champ(:, :, :) ! (iim + 1, nlat, nbniv) |
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! en entr\'ee : champ \`a filtrer, en sortie : champ filtr\'e |
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|
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logical, intent(in):: direct ! filtre direct ou inverse |
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|
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logical, intent(in):: intensive |
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! champ intensif ou extensif (pond\'er\'e par les aires) |
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|
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! Local: |
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LOGICAL griscal |
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INTEGER nlat ! nombre de latitudes \`a filtrer |
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integer nbniv ! nombre de niveaux verticaux \`a filtrer |
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INTEGER jdfil1, jdfil2, jffil1, jffil2, jdfil, jffil |
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INTEGER j, l |
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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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call assert(size(champ, 1) == iim + 1, "filtreg iim + 1") |
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nlat = size(champ, 2) |
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nbniv = size(champ, 3) |
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call assert(nlat == jjm .or. nlat == jjm + 1, "filtreg nlat") |
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griscal = nlat == jjm + 1 |
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|
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IF (.not. direct .AND. nlat == jjm) THEN |
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PRINT *, 'filtreg: inverse filter on scalar grid only' |
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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 (intensive) 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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ELSE |
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IF (intensive) 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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|
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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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DO l = 1, nbniv |
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DO j = jdfil, jffil |
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champ(:iim, j, l) = champ(:iim, j, l) * sdd1 |
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|
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IF (hemisph==1) THEN |
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IF (.not. direct) THEN |
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eignq = matmul(matrinvn(:, :, j), champ(:iim, j, l)) |
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ELSE IF (griscal) THEN |
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eignq = matmul(matriceun(:, :, j), champ(:iim, j, l)) |
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ELSE |
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eignq = matmul(matricevn(:, :, j), champ(:iim, j, l)) |
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END IF |
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ELSE |
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IF (.not. direct) THEN |
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eignq = matmul(matrinvs(:, :, j - jfiltsu + 1), & |
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champ(:iim, j, l)) |
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ELSE IF (griscal) THEN |
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eignq = matmul(matriceus(:, :, j - jfiltsu + 1), & |
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champ(:iim, j, l)) |
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ELSE |
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eignq = matmul(matricevs(:, :, j - jfiltsv + 1), & |
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champ(:iim, j, l)) |
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END IF |
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END IF |
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|
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IF (direct) THEN |
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champ(:iim, j, l) = (champ(:iim, j, l) + eignq) * sdd2 |
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ELSE |
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champ(:iim, j, l) = (champ(:iim, j, l) - eignq) * sdd2 |
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END IF |
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champ(iim + 1, j, l) = champ(1, j, l) |
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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 filtreg |
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|
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end module filtreg_m |
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