| 1 | ! $Id: atm2geo.F90 5144 2024-07-29 21:01:04Z fairhead $ |
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| 2 | |
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| 3 | SUBROUTINE atm2geo(im, jm, pte, ptn, plon, plat, pxx, pyy, pzz) |
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| 4 | USE dimphy |
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| 5 | USE lmdz_phys_para |
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| 6 | USE lmdz_grid_phy, ONLY: grid_type, unstructured, regular_lonlat |
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| 7 | USE lmdz_abort_physic, ONLY: abort_physic |
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| 8 | USE lmdz_yomcst |
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| 9 | |
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| 10 | IMPLICIT NONE |
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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 | ! Change wind local atmospheric coordinates to geocentric |
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| 17 | |
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| 18 | ! Geocentric : |
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| 19 | ! axe x is eastward : crosses (0 N, 0 E) point. |
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| 20 | ! axe y crosses (0 N, 90 E) point. |
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| 21 | ! axe z is 'up' : crosses north pole |
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| 22 | INTEGER, INTENT (IN) :: im, jm |
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| 23 | REAL, DIMENSION (im, jm), INTENT (IN) :: pte ! Eastward vector component |
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| 24 | REAL, DIMENSION (im, jm), INTENT (IN) :: ptn ! Northward vector component |
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| 25 | REAL, DIMENSION (im, jm), INTENT (IN) :: plon, plat |
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| 26 | REAL, DIMENSION (im, jm), INTENT(OUT) :: pxx, pyy, pzz ! Component in the geocentric referential |
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| 27 | REAL :: rad, reps |
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| 28 | |
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| 29 | rad = rpi / 180.0E0 |
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| 30 | reps = 1.0e-5 |
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| 31 | |
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| 32 | pxx(:, :) = & |
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| 33 | - pte(:, :) * SIN(rad * plon(:, :)) & |
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| 34 | - ptn(:, :) * SIN(rad * plat(:, :)) * COS(rad * plon(:, :)) |
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| 35 | |
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| 36 | pyy(:, :) = & |
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| 37 | + pte(:, :) * COS(rad * plon(:, :)) & |
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| 38 | - ptn(:, :) * SIN(rad * plat(:, :)) * SIN(rad * plon(:, :)) |
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| 39 | |
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| 40 | pzz(:, :) = & |
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| 41 | + ptn(:, :) * COS(rad * plat (:, :)) |
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| 42 | |
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| 43 | IF (grid_type==regular_lonlat) THEN |
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| 44 | ! Value at North Pole |
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| 45 | IF (is_north_pole_dyn) THEN |
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| 46 | pxx(:, 1) = - pte (1, 1) |
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| 47 | pyy(:, 1) = - ptn (1, 1) |
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| 48 | pzz(:, 1) = pzz(1, 1) ! => 0 |
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| 49 | ENDIF |
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| 50 | |
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| 51 | ! Value at South Pole |
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| 52 | IF (is_south_pole_dyn) THEN |
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| 53 | pxx(:, jm) = pxx(1, jm) |
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| 54 | pyy(:, jm) = pyy(1, jm) |
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| 55 | pzz(:, jm) = pzz(1, jm) ! => 0 |
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| 56 | ENDIF |
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| 57 | |
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| 58 | ELSE IF (grid_type==unstructured) THEN |
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| 59 | ! Pole nord pour Dynamico |
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| 60 | WHERE (plat(:, :) >= 90.0d+0 - reps) |
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| 61 | pxx (:, :) = -ptn (:, :) |
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| 62 | pyy (:, :) = pte (:, :) |
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| 63 | pzz (:, :) = 0.0e0 |
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| 64 | END WHERE |
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| 65 | |
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| 66 | ELSE |
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| 67 | abort_message = 'Problem: unknown grid type' |
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| 68 | CALL abort_physic(modname, abort_message, 1) |
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| 69 | END IF |
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| 70 | |
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| 71 | END SUBROUTINE atm2geo |
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