| 1 | ! |
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| 2 | ! $Id: atm2geo.f90 5285 2024-10-28 13:33:29Z fairhead $ |
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| 3 | ! |
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| 4 | SUBROUTINE atm2geo ( im, jm, pte, ptn, plon, plat, pxx, pyy, pzz ) |
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| 5 | USE dimphy |
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| 6 | USE mod_phys_lmdz_para |
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| 7 | USE mod_grid_phy_lmdz, only: grid_type, unstructured, regular_lonlat |
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| 8 | USE yomcst_mod_h |
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| 9 | IMPLICIT NONE |
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| 10 | |
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| 11 | |
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| 12 | CHARACTER (len = 6) :: clmodnam |
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| 13 | CHARACTER (len = 20) :: modname = 'atm2geo' |
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| 14 | CHARACTER (len = 80) :: abort_message |
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| 15 | |
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| 16 | ! |
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| 17 | ! Change wind local atmospheric coordinates to geocentric |
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| 18 | ! |
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| 19 | ! Geocentric : |
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| 20 | ! axe x is eastward : crosses (0 N, 0 E) point. |
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| 21 | ! axe y crosses (0 N, 90 E) point. |
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| 22 | ! axe z is 'up' : crosses north pole |
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| 23 | INTEGER, INTENT (in) :: im, jm |
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| 24 | REAL, DIMENSION (im,jm), INTENT (in) :: pte ! Eastward vector component |
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| 25 | REAL, DIMENSION (im,jm), INTENT (in) :: ptn ! Northward vector component |
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| 26 | REAL, DIMENSION (im,jm), INTENT (in) :: plon, plat |
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| 27 | REAL, DIMENSION (im,jm), INTENT(out) :: pxx, pyy, pzz ! Component in the geocentric referential |
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| 28 | REAL :: rad, reps |
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| 29 | |
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| 30 | rad = rpi / 180.0E0 |
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| 31 | reps = 1.0e-5 |
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| 32 | |
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| 33 | pxx(:,:) = & |
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| 34 | - pte(:,:) * SIN(rad * plon(:,:)) & |
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| 35 | - ptn(:,:) * SIN(rad * plat(:,:)) * COS(rad * plon(:,:)) |
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| 36 | |
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| 37 | pyy(:,:) = & |
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| 38 | + pte(:,:) * COS(rad * plon(:,:)) & |
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| 39 | - ptn(:,:) * SIN(rad * plat(:,:)) * SIN(rad * plon(:,:)) |
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| 40 | |
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| 41 | pzz(:,:) = & |
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| 42 | + ptn(:,:) * COS(rad * plat (:,:)) |
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| 43 | |
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| 44 | IF (grid_type==regular_lonlat) THEN |
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| 45 | ! Value at North Pole |
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| 46 | IF (is_north_pole_dyn) THEN |
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| 47 | pxx(:, 1) = - pte (1, 1) |
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| 48 | pyy(:, 1) = - ptn (1, 1) |
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| 49 | pzz(:, 1) = pzz(1,1) ! => 0 |
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| 50 | ENDIF |
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| 51 | |
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| 52 | ! Value at South Pole |
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| 53 | IF (is_south_pole_dyn) THEN |
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| 54 | pxx(:,jm) = pxx(1,jm) |
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| 55 | pyy(:,jm) = pyy(1,jm) |
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| 56 | pzz(:,jm) = pzz(1,jm) ! => 0 |
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| 57 | ENDIF |
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| 58 | |
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| 59 | ELSE IF (grid_type==unstructured) THEN |
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| 60 | ! Pole nord pour Dynamico |
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| 61 | WHERE ( plat(:,:) >= 90.0d+0-reps ) |
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| 62 | pxx (:,:) = -ptn (:,:) |
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| 63 | pyy (:,:) = pte (:,:) |
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| 64 | pzz (:,:) = 0.0e0 |
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| 65 | END WHERE |
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| 66 | |
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| 67 | ELSE |
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| 68 | abort_message='Problem: unknown grid type' |
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| 69 | CALL abort_physic(modname,abort_message,1) |
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| 70 | END IF |
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| 71 | |
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| 72 | |
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| 73 | END SUBROUTINE atm2geo |
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