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module nxgraro2_m |
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IMPLICIT NONE |
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contains |
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SUBROUTINE nxgraro2(xcov, ycov, lr, grx, gry, crot) |
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! From LMDZ4/libf/dyn3d/nxgraro2.F, version 1.1.1.1 2004/05/19 12:53:06 |
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! P. Le Van |
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! Calcul de nxgrad(rot) du vecteur v |
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USE dimens_m, ONLY: iim, jjm |
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USE filtreg_m, ONLY: filtreg |
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use nr_util, only: assert, assert_eq |
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! Composantes covariantes de v : |
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REAL, intent(in):: xcov(:, :, :) ! (iim + 1, jjm + 1, :) |
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REAL, intent(in):: ycov(:, :, :) ! (iim + 1, jjm, :) |
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integer, intent(in):: lr |
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REAL, intent(out):: grx(:, :, :) ! (iim + 1, jjm + 1, :) |
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REAL, intent(out):: gry(:, :, :) ! (iim + 1, jjm, :) |
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real, intent(in):: crot |
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! Variables locales |
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INTEGER klevel, iter |
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REAL rot(iim + 1, jjm, size(xcov, 3)) , nugradrs |
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!---------------------------------------------------------- |
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call assert((/size(xcov, 1), size(ycov, 1), size(grx, 1), size(gry, 1)/) & |
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== iim + 1, "nxgraro2 iim") |
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call assert((/size(xcov, 2) - 1, size(ycov, 2), size(grx, 2) - 1, & |
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size(gry, 2)/) == jjm, "nxgraro2 jjm") |
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klevel = assert_eq(size(xcov, 3), size(ycov, 3), size(grx, 3), & |
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size(gry, 3), "nxgraro2 klevel") |
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grx = xcov |
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gry = ycov |
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CALL rotatf(klevel, grx, gry, rot) |
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CALL laplacien_rot(klevel, rot, rot, grx, gry) |
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! Itération de l'opérateur laplacien_rotgam |
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DO iter = 1, lr - 2 |
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CALL laplacien_rotgam(klevel, rot, rot) |
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ENDDO |
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CALL filtreg(rot, jjm, klevel, 2, 1, .FALSE.) |
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CALL nxgrad(klevel, rot, grx, gry) |
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nugradrs = (-1.)**lr * crot |
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grx = grx * nugradrs |
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gry = gry * nugradrs |
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END SUBROUTINE nxgraro2 |
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end module nxgraro2_m |
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