[12807] | 1 | MODULE domutl |
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[1725] | 2 | !!====================================================================== |
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[12807] | 3 | !! *** MODULE domutl *** |
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| 4 | !! Grid utilities: |
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[1725] | 5 | !!====================================================================== |
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[12807] | 6 | !! History : 4.2 ! 2020-04 (S. Masson) Original code |
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[1725] | 7 | !!---------------------------------------------------------------------- |
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| 8 | |
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| 9 | !!---------------------------------------------------------------------- |
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[2715] | 10 | !! dom_ngb : find the closest grid point from a given lon/lat position |
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[12807] | 11 | !! dom_uniq : identify unique point of a grid (TUVF) |
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[1725] | 12 | !!---------------------------------------------------------------------- |
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[12807] | 13 | ! |
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[2715] | 14 | USE dom_oce ! ocean space and time domain |
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[9019] | 15 | ! |
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[3294] | 16 | USE in_out_manager ! I/O manager |
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[12807] | 17 | USE lbclnk ! ocean lateral boundary conditions (or mpp link) |
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[2715] | 18 | USE lib_mpp ! for mppsum |
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[1725] | 19 | |
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| 20 | IMPLICIT NONE |
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| 21 | PRIVATE |
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| 22 | |
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[12807] | 23 | PUBLIC dom_ngb ! routine called in iom.F90 module |
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| 24 | PUBLIC dom_uniq ! Called by dommsk and domwri |
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[1725] | 25 | |
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| 26 | !!---------------------------------------------------------------------- |
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[12807] | 27 | !! NEMO/OCE 4.2 , NEMO Consortium (2020) |
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[1725] | 28 | !! $Id$ |
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[10068] | 29 | !! Software governed by the CeCILL license (see ./LICENSE) |
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[1725] | 30 | !!---------------------------------------------------------------------- |
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| 31 | CONTAINS |
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| 32 | |
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[6140] | 33 | SUBROUTINE dom_ngb( plon, plat, kii, kjj, cdgrid, kkk ) |
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[1725] | 34 | !!---------------------------------------------------------------------- |
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| 35 | !! *** ROUTINE dom_ngb *** |
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| 36 | !! |
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[2715] | 37 | !! ** Purpose : find the closest grid point from a given lon/lat position |
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[1725] | 38 | !! |
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| 39 | !! ** Method : look for minimum distance in cylindrical projection |
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| 40 | !! -> not good if located at too high latitude... |
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| 41 | !!---------------------------------------------------------------------- |
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| 42 | REAL(wp) , INTENT(in ) :: plon, plat ! longitude,latitude of the point |
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| 43 | INTEGER , INTENT( out) :: kii, kjj ! i-,j-index of the closes grid point |
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[6140] | 44 | INTEGER , INTENT(in ), OPTIONAL :: kkk ! k-index of the mask level used |
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[1725] | 45 | CHARACTER(len=1), INTENT(in ) :: cdgrid ! grid name 'T', 'U', 'V', 'W' |
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[2715] | 46 | ! |
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[6140] | 47 | INTEGER :: ik ! working level |
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[2715] | 48 | INTEGER , DIMENSION(2) :: iloc |
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| 49 | REAL(wp) :: zlon, zmini |
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[9019] | 50 | REAL(wp), DIMENSION(jpi,jpj) :: zglam, zgphi, zmask, zdist |
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[1725] | 51 | !!-------------------------------------------------------------------- |
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[2715] | 52 | ! |
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[6140] | 53 | ik = 1 |
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| 54 | IF ( PRESENT(kkk) ) ik=kkk |
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[12807] | 55 | ! |
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| 56 | CALL dom_uniq(zmask,cdgrid) |
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| 57 | ! |
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[1725] | 58 | SELECT CASE( cdgrid ) |
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[12807] | 59 | CASE( 'U' ) ; zglam(:,:) = glamu(:,:) ; zgphi(:,:) = gphiu(:,:) ; zmask(:,:) = zmask(:,:) * umask(:,:,ik) |
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| 60 | CASE( 'V' ) ; zglam(:,:) = glamv(:,:) ; zgphi(:,:) = gphiv(:,:) ; zmask(:,:) = zmask(:,:) * vmask(:,:,ik) |
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| 61 | CASE( 'F' ) ; zglam(:,:) = glamf(:,:) ; zgphi(:,:) = gphif(:,:) ; zmask(:,:) = zmask(:,:) * fmask(:,:,ik) |
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| 62 | CASE DEFAULT ; zglam(:,:) = glamt(:,:) ; zgphi(:,:) = gphit(:,:) ; zmask(:,:) = zmask(:,:) * tmask(:,:,ik) |
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[1725] | 63 | END SELECT |
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[12807] | 64 | ! |
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[7646] | 65 | zlon = MOD( plon + 720., 360. ) ! plon between 0 and 360 |
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| 66 | zglam(:,:) = MOD( zglam(:,:) + 720., 360. ) ! glam between 0 and 360 |
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| 67 | IF( zlon > 270. ) zlon = zlon - 360. ! zlon between -90 and 270 |
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| 68 | IF( zlon < 90. ) WHERE( zglam(:,:) > 180. ) zglam(:,:) = zglam(:,:) - 360. ! glam between -180 and 180 |
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| 69 | zglam(:,:) = zglam(:,:) - zlon |
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[1725] | 70 | |
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| 71 | zgphi(:,:) = zgphi(:,:) - plat |
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| 72 | zdist(:,:) = zglam(:,:) * zglam(:,:) + zgphi(:,:) * zgphi(:,:) |
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| 73 | |
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| 74 | IF( lk_mpp ) THEN |
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[10425] | 75 | CALL mpp_minloc( 'domngb', zdist(:,:), zmask, zmini, iloc) |
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| 76 | kii = iloc(1) ; kjj = iloc(2) |
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[1725] | 77 | ELSE |
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| 78 | iloc(:) = MINLOC( zdist(:,:), mask = zmask(:,:) == 1.e0 ) |
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| 79 | kii = iloc(1) + nimpp - 1 |
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| 80 | kjj = iloc(2) + njmpp - 1 |
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| 81 | ENDIF |
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[2715] | 82 | ! |
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[1725] | 83 | END SUBROUTINE dom_ngb |
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| 84 | |
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[12807] | 85 | |
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| 86 | SUBROUTINE dom_uniq( puniq, cdgrd ) |
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| 87 | !!---------------------------------------------------------------------- |
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| 88 | !! *** ROUTINE dom_uniq *** |
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| 89 | !! |
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| 90 | !! ** Purpose : identify unique point of a grid (TUVF) |
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| 91 | !! |
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| 92 | !! ** Method : 1) aplly lbc_lnk on an array with different values for each element |
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| 93 | !! 2) check which elements have been changed |
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| 94 | !!---------------------------------------------------------------------- |
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| 95 | CHARACTER(len=1) , INTENT(in ) :: cdgrd ! |
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| 96 | REAL(wp), DIMENSION(:,:), INTENT(inout) :: puniq ! |
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| 97 | ! |
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| 98 | REAL(wp) :: zshift ! shift value link to the process number |
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| 99 | INTEGER :: ji ! dummy loop indices |
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| 100 | LOGICAL , DIMENSION(jpi,jpj,1) :: lluniq ! store whether each point is unique or not |
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| 101 | REAL(wp), DIMENSION(jpi,jpj ) :: ztstref |
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| 102 | !!---------------------------------------------------------------------- |
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| 103 | ! |
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| 104 | ! build an array with different values for each element |
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| 105 | ! in mpp: make sure that these values are different even between process |
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| 106 | ! -> apply a shift value according to the process number |
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| 107 | zshift = jpimax * jpjmax * ( narea - 1 ) |
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| 108 | ztstref(:,:) = RESHAPE( (/ (zshift + REAL(ji,wp), ji = 1, jpi*jpj) /), (/ jpi, jpj /) ) |
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| 109 | ! |
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| 110 | puniq(:,:) = ztstref(:,:) ! default definition |
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| 111 | CALL lbc_lnk( 'domwri', puniq, cdgrd, 1. ) ! apply boundary conditions |
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| 112 | lluniq(:,:,1) = puniq(:,:) == ztstref(:,:) ! check which values have not been changed |
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| 113 | ! |
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| 114 | puniq(:,:) = REAL( COUNT( lluniq(:,:,:), dim = 3 ), wp ) |
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| 115 | ! |
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| 116 | END SUBROUTINE dom_uniq |
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| 117 | |
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[1725] | 118 | !!====================================================================== |
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[12807] | 119 | END MODULE domutl |
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