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module gradiv2_m |
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IMPLICIT NONE |
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|
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contains |
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SUBROUTINE gradiv2(xcov, ycov, ld, gdx, gdy, cdivu) |
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! From LMDZ4/libf/dyn3d/gradiv2.F, version 1.1.1.1 2004/05/19 12:53:07 |
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! P. Le Van |
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! Calcul du gradient de la divergence du vecteur v. |
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|
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USE comgeom, ONLY: cuvscvgam1, cvuscugam1, unsair_gam1, unsapolnga1, & |
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unsapolsga1 |
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USE dimens_m, ONLY: iim, jjm |
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use divergf_m, only: divergf |
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USE filtreg_scal_m, ONLY: filtreg_scal |
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use grad_m, only: grad |
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use laplacien_gam_m, only: laplacien_gam |
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use laplacien_m, only: laplacien |
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use nr_util, only: assert_eq, assert |
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|
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! Composantes covariantes de v : |
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REAL, intent(in):: xcov(:, :, :) ! (iim + 1, jjm + 1, klevel) |
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REAL, intent(in):: ycov(:, :, :) ! (iim + 1, jjm, klevel) |
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|
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integer, intent(in):: ld |
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REAL, intent(out):: gdx(:, :, :) ! (iim + 1, jjm + 1, klevel) |
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REAL, intent(out):: gdy(:, :, :) ! (iim + 1, jjm, klevel) |
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real, intent(in):: cdivu |
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|
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! Variables locales : |
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REAL nugrads, div(iim + 1, jjm + 1, size(xcov, 3)) |
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INTEGER iter, klevel |
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|
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!-------------------------------------------------------------- |
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|
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call assert((/size(xcov, 1), size(ycov, 1), size(gdx, 1), size(gdy, 1)/) & |
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== iim + 1, "gradiv2 iim") |
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call assert((/size(xcov, 2) - 1, size(ycov, 2), size(gdx, 2) - 1, & |
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size(gdy, 2)/) == jjm, "gradiv2 iim") |
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klevel = assert_eq(size(xcov, 3), size(ycov, 3), size(gdx, 3), & |
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size(gdy, 3), "gradiv2 klevel") |
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|
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CALL divergf(klevel, xcov, ycov, div) |
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|
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IF (ld > 1) THEN |
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CALL laplacien(klevel, div) |
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|
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! Itération de l'opérateur laplacien_gam |
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DO iter = 1, ld - 2 |
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CALL laplacien_gam(klevel, cuvscvgam1, cvuscugam1, unsair_gam1, & |
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unsapolnga1, unsapolsga1, div, div) |
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END DO |
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ENDIF |
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|
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CALL filtreg_scal(div, direct = .true., intensive = .true.) |
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CALL grad(klevel, div, gdx, gdy) |
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nugrads = (-1.)**ld * cdivu |
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|
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gdx = gdx * nugrads |
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gdy = gdy * nugrads |
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|
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END SUBROUTINE gradiv2 |
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|
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end module gradiv2_m |
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