MODULE domc1d !!====================================================================== !! *** MODULE domc1d *** !! Ocean Domain : 1D column position from lat/lon namelist specification !!====================================================================== !! History : 3.5 ! 2013-04 (D. Calvert) Original code !!---------------------------------------------------------------------- #if defined key_c1d !!---------------------------------------------------------------------- !! 'key_c1d' : 1D Configuration !!---------------------------------------------------------------------- !! dom_c1d : Determine jpizoom/jpjzoom from a given lat/lon !!---------------------------------------------------------------------- USE phycst ! Physical constants (and par_oce) USE iom ! I/O library (iom_get) USE in_out_manager ! I/O manager (ctmp1) USE dom_oce , ONLY : nimpp, njmpp ! Shared/distributed memory setting (mpp_init routine) USE wrk_nemo ! Memory allocation USE timing ! Timing IMPLICIT NONE PRIVATE PUBLIC dom_c1d ! Routine called in domcfg.F90 !!---------------------------------------------------------------------- !! NEMO/OPA 3.3 , NEMO Consortium (2010) !! $Id: domc1d.F90 2355 2015-05-20 07:11:50Z ufla $ !! Software governed by the CeCILL licence (NEMOGCM/NEMO_CeCILL.txt) !!---------------------------------------------------------------------- CONTAINS SUBROUTINE dom_c1d( plat, plon ) !!---------------------------------------------------------------------- !! *** ROUTINE dom_c1d *** !! !! ** Purpose : Recalculate jpizoom/jpjzoom indices from lat/lon point !! !! ** Method : Calculate global gphit and glamt as for dom_hgr. !! After, find closest grid point to lat/lon point as for !! dom_ngb on T grid. From this infer jpizoom and jpjzoom. !! !! ** Action : Recalculate jpizoom, jpjzoom (indices of C1D zoom) !!---------------------------------------------------------------------- NAMELIST/namdom/ nn_bathy, rn_bathy , rn_e3zps_min, rn_e3zps_rat, nn_msh, rn_hmin, & & nn_acc , rn_atfp , rn_rdt , rn_rdtmin , & & rn_rdtmax, rn_rdth , nn_closea , ln_crs, & & jphgr_msh, & & ppglam0, ppgphi0, ppe1_deg, ppe2_deg, ppe1_m, ppe2_m, & & ppsur, ppa0, ppa1, ppkth, ppacr, ppdzmin, pphmax, ldbletanh, & & ppa2, ppkth2, ppacr2 INTEGER :: ji, jj ! Dummy loop indices INTEGER :: inum ! Coordinate file handle (case 0) INTEGER :: ijeq ! Index of equator T point (case 4) INTEGER :: ios ! Local integer output status for namelist read INTEGER , DIMENSION(2) :: iloc ! Minloc returned indices REAL(wp), INTENT(in) :: plat ! Column latitude REAL(wp), INTENT(in) :: plon ! Column longitude REAL(wp) :: zlon ! Wraparound longitude REAL(wp) :: zti, ztj, zarg ! Local scalars REAL(wp) :: glam0, gphi0 ! Variables corresponding to parameters ppglam0 ppgphi0 set in par_oce REAL(wp) :: zlam1, zcos_alpha, ze1, ze1deg ! Case 5 local scalars REAL(wp) :: zphi1, zsin_alpha, zim05, zjm05 ! " REAL(wp) , POINTER, DIMENSION(:,:) :: gphidta, glamdta, zdist ! Global lat/lon !!---------------------------------------------------------------------- IF( nn_timing == 1 ) CALL timing_start('dom_c1d') REWIND( numnam_ref ) ! Namelist namdom in reference namelist : space & time domain (bathymetry, mesh, timestep) READ ( numnam_ref, namdom, IOSTAT = ios, ERR = 901 ) 901 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namdom in reference namelist', lwp ) ! REWIND( numnam_cfg ) ! Namelist namdom in configuration namelist : space & time domain (bathymetry, mesh, timestep) READ ( numnam_cfg, namdom, IOSTAT = ios, ERR = 902 ) 902 IF( ios /= 0 ) CALL ctl_nam ( ios , 'namdom in configuration namelist', lwp ) CALL wrk_alloc( jpidta, jpjdta, gphidta, glamdta, zdist ) ! ============================= ! ! Code from dom_hgr: ! ! Calculate global horizontal ! ! mesh, only glamt and gphit ! ! ============================= ! SELECT CASE( jphgr_msh ) ! type of horizontal mesh CASE ( 0 ) ! curvilinear coordinate on the sphere read in coordinate.nc file CALL iom_open( 'coordinates', inum ) CALL iom_get( inum, jpdom_unknown, 'glamt', glamdta ) ! mig, mjg undefined at this point CALL iom_get( inum, jpdom_unknown, 'gphit', gphidta ) ! so use jpdom_unknown not jpdom_data CALL iom_close ( inum ) CASE ( 1 ) ! geographical mesh on the sphere with regular grid-spacing DO jj = 1, jpjdta DO ji = 1, jpidta zti = FLOAT( ji - 1 + nimpp - 1 ) ztj = FLOAT( jj - 1 + njmpp - 1 ) glamdta(ji,jj) = ppglam0 + ppe1_deg * zti gphidta(ji,jj) = ppgphi0 + ppe2_deg * ztj END DO END DO CASE ( 2:3 ) ! f- or beta-plane with regular grid-spacing glam0 = 0.e0 gphi0 = - ppe2_m * 1.e-3 DO jj = 1, jpjdta DO ji = 1, jpidta glamdta(ji,jj) = glam0 + ppe1_m * 1.e-3 * FLOAT( ji - 1 + nimpp - 1 ) gphidta(ji,jj) = gphi0 + ppe2_m * 1.e-3 * FLOAT( jj - 1 + njmpp - 1 ) END DO END DO CASE ( 4 ) ! geographical mesh on the sphere, isotropic MERCATOR type IF( ppgphi0 == -90 ) CALL ctl_stop( ' Mercator grid cannot start at south pole !!!! ' ) zarg = rpi / 4. - rpi / 180. * ppgphi0 / 2. ijeq = ABS( 180. / rpi * LOG( COS( zarg ) / SIN( zarg ) ) / ppe1_deg ) IF( ppgphi0 > 0 ) ijeq = -ijeq DO jj = 1, jpjdta DO ji = 1, jpidta zti = FLOAT( ji - 1 + nimpp - 1 ) ztj = FLOAT( jj - ijeq + njmpp - 1 ) glamdta(ji,jj) = ppglam0 + ppe1_deg * zti gphidta(ji,jj) = 1. / rad * ASIN ( TANH( ppe1_deg * rad * ztj ) ) END DO END DO CASE ( 5 ) ! beta-plane with regular grid-spacing and rotated domain (GYRE configuration) zlam1 = -85 zphi1 = 29 ze1 = 106000. / FLOAT(jp_cfg) zsin_alpha = - SQRT( 2. ) / 2. zcos_alpha = SQRT( 2. ) / 2. ze1deg = ze1 / (ra * rad) glam0 = zlam1 + zcos_alpha * ze1deg * FLOAT( jpjdta-2 ) ! Force global gphi0 = zphi1 + zsin_alpha * ze1deg * FLOAT( jpjdta-2 ) DO jj = 1, jpjdta DO ji = 1, jpidta zim05 = FLOAT( ji + nimpp - 1 ) - 1.5 zjm05 = FLOAT( jj + njmpp - 1 ) - 1.5 glamdta(ji,jj) = glam0 + zim05 * ze1deg * zcos_alpha + zjm05 * ze1deg * zsin_alpha gphidta(ji,jj) = gphi0 - zim05 * ze1deg * zsin_alpha + zjm05 * ze1deg * zcos_alpha END DO END DO CASE DEFAULT WRITE(ctmp1,*) ' bad flag value for jphgr_msh = ', jphgr_msh CALL ctl_stop( ctmp1 ) END SELECT ! ============================== ! ! Code from dom_ngb: ! ! Calculate the nearest grid ! ! point to the given lat/lon & ! ! update jpizoom and jpjzoom ! ! ============================== ! zlon = MOD( plon + 720., 360. ) ! plon between 0 and 360 glamdta(:,:) = MOD( glamdta(:,:) + 720., 360. ) ! glamdta between 0 and 360 IF( zlon > 270. ) zlon = zlon - 360. ! zlon between -90 and 270 IF( zlon < 90. ) WHERE( glamdta(:,:) > 180. ) glamdta(:,:) = glamdta(:,:) - 360. ! glamdta between -180 and 180 glamdta(:,:) = glamdta(:,:) - zlon gphidta(:,:) = gphidta(:,:) - plat zdist(:,:) = glamdta(:,:) * glamdta(:,:) + gphidta(:,:) * gphidta(:,:) iloc(:) = MINLOC( zdist(:,:) ) ! No mask; zoom indices freely defined jpizoom = iloc(1) + nimpp - 2 ! Minloc index - 1; want the bottom-left jpjzoom = iloc(2) + njmpp - 2 ! corner index of the zoom domain. CALL wrk_dealloc( jpidta, jpjdta, gphidta, glamdta, zdist ) IF (lwp) THEN WRITE(numout,*) WRITE(numout,*) 'dom_c1d : compute jpizoom & jpjzoom from global mesh and given coordinates' WRITE(numout,*) '~~~~~~~' WRITE(numout,*) ' column i zoom index jpizoom = ', jpizoom WRITE(numout,*) ' column j zoom index jpjzoom = ', jpjzoom WRITE(numout,*) ENDIF IF( nn_timing == 1 ) CALL timing_stop('dom_c1d') END SUBROUTINE dom_c1d #else !!---------------------------------------------------------------------- !! Default option NO 1D Configuration !!---------------------------------------------------------------------- CONTAINS SUBROUTINE dom_c1d( plat, plon ) ! Empty routine REAL :: plat, plon WRITE(*,*) 'dom_c1d: You should not have seen this print! error?',plat,plon END SUBROUTINE dom_c1d #endif !!====================================================================== END MODULE domc1d