| 1 | MODULE domc1d |
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| 2 | !!====================================================================== |
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| 3 | !! *** MODULE domc1d *** |
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| 4 | !! Ocean Domain : 1D column position from lat/lon namelist specification |
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| 5 | !!====================================================================== |
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| 6 | !! History : 3.5 ! 2013-04 (D. Calvert) Original code |
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| 7 | !!---------------------------------------------------------------------- |
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| 8 | #if defined key_c1d |
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| 9 | !!---------------------------------------------------------------------- |
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| 10 | !! 'key_c1d' : 1D Configuration |
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| 11 | !!---------------------------------------------------------------------- |
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| 12 | !! dom_c1d : Determine jpizoom/jpjzoom from a given lat/lon |
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| 13 | !!---------------------------------------------------------------------- |
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| 14 | USE phycst ! Physical constants (and par_oce) |
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| 15 | USE iom ! I/O library (iom_get) |
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| 16 | USE in_out_manager ! I/O manager (ctmp1) |
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| 17 | USE dom_oce , ONLY : nimpp, njmpp ! Shared/distributed memory setting (mpp_init routine) |
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| 18 | USE wrk_nemo ! Memory allocation |
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| 19 | USE timing ! Timing |
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| 20 | |
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| 21 | IMPLICIT NONE |
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| 22 | PRIVATE |
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| 23 | |
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| 24 | PUBLIC dom_c1d ! Routine called in domcfg.F90 |
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| 25 | |
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| 26 | !!---------------------------------------------------------------------- |
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| 27 | !! NEMO/OPA 3.3 , NEMO Consortium (2010) |
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| 28 | !! $Id$ |
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| 29 | !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) |
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| 30 | !!---------------------------------------------------------------------- |
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| 31 | CONTAINS |
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| 32 | |
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| 33 | SUBROUTINE dom_c1d( plat, plon ) |
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| 34 | !!---------------------------------------------------------------------- |
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| 35 | !! *** ROUTINE dom_c1d *** |
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| 36 | !! |
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| 37 | !! ** Purpose : Recalculate jpizoom/jpjzoom indices from lat/lon point |
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| 38 | !! |
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| 39 | !! ** Method : Calculate global gphit and glamt as for dom_hgr. |
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| 40 | !! After, find closest grid point to lat/lon point as for |
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| 41 | !! dom_ngb on T grid. From this infer jpizoom and jpjzoom. |
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| 42 | !! |
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| 43 | !! ** Action : Recalculate jpizoom, jpjzoom (indices of C1D zoom) |
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| 44 | !!---------------------------------------------------------------------- |
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| 45 | NAMELIST/namdom/ nn_bathy, rn_bathy , rn_e3zps_min, rn_e3zps_rat, nn_msh, rn_hmin, & |
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| 46 | & rn_atfp , rn_rdt , nn_closea , ln_crs, & |
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| 47 | & jphgr_msh, & |
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| 48 | & ppglam0, ppgphi0, ppe1_deg, ppe2_deg, ppe1_m, ppe2_m, & |
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| 49 | & ppsur, ppa0, ppa1, ppkth, ppacr, ppdzmin, pphmax, ldbletanh, & |
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| 50 | & ppa2, ppkth2, ppacr2 |
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| 51 | |
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| 52 | INTEGER :: ji, jj ! Dummy loop indices |
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| 53 | INTEGER :: inum ! Coordinate file handle (case 0) |
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| 54 | INTEGER :: ijeq ! Index of equator T point (case 4) |
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| 55 | INTEGER :: ios ! Local integer output status for namelist read |
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| 56 | |
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| 57 | INTEGER , DIMENSION(2) :: iloc ! Minloc returned indices |
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| 58 | |
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| 59 | REAL(wp), INTENT(in) :: plat ! Column latitude |
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| 60 | REAL(wp), INTENT(in) :: plon ! Column longitude |
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| 61 | |
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| 62 | REAL(wp) :: zlon ! Wraparound longitude |
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| 63 | REAL(wp) :: zti, ztj, zarg ! Local scalars |
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| 64 | REAL(wp) :: glam0, gphi0 ! Variables corresponding to parameters ppglam0 ppgphi0 set in par_oce |
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| 65 | REAL(wp) :: zlam1, zcos_alpha, ze1, ze1deg ! Case 5 local scalars |
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| 66 | REAL(wp) :: zphi1, zsin_alpha, zim05, zjm05 ! " |
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| 67 | |
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| 68 | REAL(wp) , POINTER, DIMENSION(:,:) :: gphidta, glamdta, zdist ! Global lat/lon |
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| 69 | !!---------------------------------------------------------------------- |
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| 70 | |
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| 71 | IF( nn_timing == 1 ) CALL timing_start('dom_c1d') |
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| 72 | |
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| 73 | REWIND( numnam_ref ) ! Namelist namdom in reference namelist : space & time domain (bathymetry, mesh, timestep) |
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| 74 | READ ( numnam_ref, namdom, IOSTAT = ios, ERR = 901 ) |
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| 75 | 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namdom in reference namelist', lwp ) |
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| 76 | |
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| 77 | ! |
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| 78 | REWIND( numnam_cfg ) ! Namelist namdom in configuration namelist : space & time domain (bathymetry, mesh, timestep) |
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| 79 | READ ( numnam_cfg, namdom, IOSTAT = ios, ERR = 902 ) |
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| 80 | 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namdom in configuration namelist', lwp ) |
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| 81 | |
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| 82 | CALL wrk_alloc( jpidta, jpjdta, gphidta, glamdta, zdist ) |
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| 83 | |
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| 84 | |
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| 85 | ! ============================= ! |
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| 86 | ! Code from dom_hgr: ! |
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| 87 | ! Calculate global horizontal ! |
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| 88 | ! mesh, only glamt and gphit ! |
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| 89 | ! ============================= ! |
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| 90 | |
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| 91 | SELECT CASE( jphgr_msh ) ! type of horizontal mesh |
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| 92 | |
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| 93 | CASE ( 0 ) ! curvilinear coordinate on the sphere read in coordinate.nc file |
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| 94 | |
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| 95 | CALL iom_open( 'coordinates', inum ) |
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| 96 | CALL iom_get( inum, jpdom_unknown, 'glamt', glamdta ) ! mig, mjg undefined at this point |
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| 97 | CALL iom_get( inum, jpdom_unknown, 'gphit', gphidta ) ! so use jpdom_unknown not jpdom_data |
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| 98 | CALL iom_close ( inum ) |
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| 99 | |
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| 100 | CASE ( 1 ) ! geographical mesh on the sphere with regular grid-spacing |
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| 101 | |
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| 102 | DO jj = 1, jpjdta |
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| 103 | DO ji = 1, jpidta |
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| 104 | zti = FLOAT( ji - 1 + nimpp - 1 ) |
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| 105 | ztj = FLOAT( jj - 1 + njmpp - 1 ) |
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| 106 | |
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| 107 | glamdta(ji,jj) = ppglam0 + ppe1_deg * zti |
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| 108 | gphidta(ji,jj) = ppgphi0 + ppe2_deg * ztj |
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| 109 | END DO |
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| 110 | END DO |
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| 111 | |
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| 112 | CASE ( 2:3 ) ! f- or beta-plane with regular grid-spacing |
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| 113 | |
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| 114 | glam0 = 0.e0 |
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| 115 | gphi0 = - ppe2_m * 1.e-3 |
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| 116 | |
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| 117 | DO jj = 1, jpjdta |
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| 118 | DO ji = 1, jpidta |
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| 119 | glamdta(ji,jj) = glam0 + ppe1_m * 1.e-3 * FLOAT( ji - 1 + nimpp - 1 ) |
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| 120 | gphidta(ji,jj) = gphi0 + ppe2_m * 1.e-3 * FLOAT( jj - 1 + njmpp - 1 ) |
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| 121 | END DO |
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| 122 | END DO |
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| 123 | |
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| 124 | CASE ( 4 ) ! geographical mesh on the sphere, isotropic MERCATOR type |
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| 125 | |
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| 126 | IF( ppgphi0 == -90 ) CALL ctl_stop( ' Mercator grid cannot start at south pole !!!! ' ) |
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| 127 | |
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| 128 | zarg = rpi / 4. - rpi / 180. * ppgphi0 / 2. |
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| 129 | ijeq = ABS( 180. / rpi * LOG( COS( zarg ) / SIN( zarg ) ) / ppe1_deg ) |
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| 130 | IF( ppgphi0 > 0 ) ijeq = -ijeq |
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| 131 | |
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| 132 | DO jj = 1, jpjdta |
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| 133 | DO ji = 1, jpidta |
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| 134 | zti = FLOAT( ji - 1 + nimpp - 1 ) |
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| 135 | ztj = FLOAT( jj - ijeq + njmpp - 1 ) |
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| 136 | |
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| 137 | glamdta(ji,jj) = ppglam0 + ppe1_deg * zti |
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| 138 | gphidta(ji,jj) = 1. / rad * ASIN ( TANH( ppe1_deg * rad * ztj ) ) |
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| 139 | END DO |
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| 140 | END DO |
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| 141 | |
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| 142 | CASE ( 5 ) ! beta-plane with regular grid-spacing and rotated domain (GYRE configuration) |
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| 143 | |
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| 144 | zlam1 = -85 |
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| 145 | zphi1 = 29 |
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| 146 | ze1 = 106000. / FLOAT(jp_cfg) |
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| 147 | |
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| 148 | zsin_alpha = - SQRT( 2. ) / 2. |
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| 149 | zcos_alpha = SQRT( 2. ) / 2. |
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| 150 | ze1deg = ze1 / (ra * rad) |
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| 151 | |
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| 152 | glam0 = zlam1 + zcos_alpha * ze1deg * FLOAT( jpjdta-2 ) ! Force global |
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| 153 | gphi0 = zphi1 + zsin_alpha * ze1deg * FLOAT( jpjdta-2 ) |
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| 154 | |
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| 155 | DO jj = 1, jpjdta |
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| 156 | DO ji = 1, jpidta |
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| 157 | zim05 = FLOAT( ji + nimpp - 1 ) - 1.5 |
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| 158 | zjm05 = FLOAT( jj + njmpp - 1 ) - 1.5 |
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| 159 | |
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| 160 | glamdta(ji,jj) = glam0 + zim05 * ze1deg * zcos_alpha + zjm05 * ze1deg * zsin_alpha |
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| 161 | gphidta(ji,jj) = gphi0 - zim05 * ze1deg * zsin_alpha + zjm05 * ze1deg * zcos_alpha |
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| 162 | END DO |
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| 163 | END DO |
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| 164 | |
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| 165 | CASE DEFAULT |
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| 166 | |
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| 167 | WRITE(ctmp1,*) ' bad flag value for jphgr_msh = ', jphgr_msh |
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| 168 | CALL ctl_stop( ctmp1 ) |
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| 169 | |
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| 170 | END SELECT |
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| 171 | |
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| 172 | |
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| 173 | ! ============================== ! |
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| 174 | ! Code from dom_ngb: ! |
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| 175 | ! Calculate the nearest grid ! |
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| 176 | ! point to the given lat/lon & ! |
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| 177 | ! update jpizoom and jpjzoom ! |
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| 178 | ! ============================== ! |
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| 179 | |
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| 180 | zlon = MOD( plon + 720., 360. ) ! plon between 0 and 360 |
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| 181 | glamdta(:,:) = MOD( glamdta(:,:) + 720., 360. ) ! glamdta between 0 and 360 |
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| 182 | IF( zlon > 270. ) zlon = zlon - 360. ! zlon between -90 and 270 |
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| 183 | IF( zlon < 90. ) WHERE( glamdta(:,:) > 180. ) glamdta(:,:) = glamdta(:,:) - 360. ! glamdta between -180 and 180 |
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| 184 | |
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| 185 | glamdta(:,:) = glamdta(:,:) - zlon |
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| 186 | gphidta(:,:) = gphidta(:,:) - plat |
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| 187 | zdist(:,:) = glamdta(:,:) * glamdta(:,:) + gphidta(:,:) * gphidta(:,:) |
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| 188 | |
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| 189 | iloc(:) = MINLOC( zdist(:,:) ) ! No mask; zoom indices freely defined |
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| 190 | jpizoom = iloc(1) + nimpp - 2 ! Minloc index - 1; want the bottom-left |
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| 191 | jpjzoom = iloc(2) + njmpp - 2 ! corner index of the zoom domain. |
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| 192 | |
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| 193 | CALL wrk_dealloc( jpidta, jpjdta, gphidta, glamdta, zdist ) |
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| 194 | |
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| 195 | IF (lwp) THEN |
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| 196 | WRITE(numout,*) |
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| 197 | WRITE(numout,*) 'dom_c1d : compute jpizoom & jpjzoom from global mesh and given coordinates' |
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| 198 | WRITE(numout,*) '~~~~~~~' |
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| 199 | WRITE(numout,*) ' column i zoom index jpizoom = ', jpizoom |
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| 200 | WRITE(numout,*) ' column j zoom index jpjzoom = ', jpjzoom |
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| 201 | WRITE(numout,*) |
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| 202 | ENDIF |
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| 203 | |
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| 204 | IF( nn_timing == 1 ) CALL timing_stop('dom_c1d') |
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| 205 | |
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| 206 | END SUBROUTINE dom_c1d |
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| 207 | |
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| 208 | #else |
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| 209 | !!---------------------------------------------------------------------- |
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| 210 | !! Default option NO 1D Configuration |
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| 211 | !!---------------------------------------------------------------------- |
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| 212 | CONTAINS |
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| 213 | SUBROUTINE dom_c1d( plat, plon ) ! Empty routine |
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| 214 | REAL :: plat, plon |
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| 215 | WRITE(*,*) 'dom_c1d: You should not have seen this print! error?',plat,plon |
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| 216 | END SUBROUTINE dom_c1d |
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| 217 | #endif |
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| 218 | |
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| 219 | !!====================================================================== |
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| 220 | END MODULE domc1d |
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