!
#define TRACEBACK write (gol,'("in ",a," (",a,", line",i5,")")') rname, __FILE__, __LINE__; call goErr
!
#define IF_NOTOK_RETURN(action) if (status/=0) then; TRACEBACK; action; return; end if
#define IF_ERROR_RETURN(action) if (status >0) then; TRACEBACK; action; return; end if
!
#define PRISM_ERR write (gol,'("from call to PRISM routine")'); call goErr
#define IF_PRISM_NOTOK_RETURN(action) if (status/=OASIS_OK) then; PRISM_ERR; TRACEBACK; action; return; end if
!
#include "tm5.inc"
!
!-----------------------------------------------------------------------------
!                    TM5                                                     !
!-----------------------------------------------------------------------------
!BOP
!
! !MODULE:     TM5_PRISM
!
! !DESCRIPTION: 
!\\
!\\
! !INTERFACE: 
!
MODULE TM5_PRISM
  !
  ! !USES:
  !
  USE MOD_OASIS
  USE GO, ONLY : gol, goPr, goErr, TDate

  IMPLICIT NONE
  PRIVATE
  !
  ! !PUBLIC MEMBER FUNCTIONS:
  !
  public  ::  TM5_Prism_Init   ! read control parameters from rc file
  public  ::  TM5_Prism_Init2  ! prism init: grids, partition, coupled variables
  public  ::  TM5_Prism_Done   ! deallocate
  public  ::  SetPrismTime     ! current time/date into prism format
  public  ::  InqCplVar        ! check if a coupled variable exists
  public  ::  Init, Done, Setup, Remap  ! methods for TshRemap object 
  !
  ! !PUBLIC DATA MEMBERS:
  !
  character(len=6), public, parameter :: comp_name = 'ctm5mp'
  integer,          public :: PRISM_start_date(6) ! prism reference start time
  integer,          public :: comp_id             ! tm5 id for prism
  integer,          public :: ifs_cpl_freq        ! ifs coupling frequency in hours
  integer,          public :: lpj_cpl_freq        ! lpjg coupling frequency in hours
  integer,          public :: pis_cpl_freq        ! pisces coupling frequency in hours
  integer,          public :: ifs_cpl_nlev        ! number of levels for coupling with IFS
  integer,          public :: ifs_cpl_nlev_cutoff ! reduced number of levels for coupling with IFS, 
                                                  ! applied for aerosols
  integer, public ::  ifs_shT      ! ifs spectral fields : resolution
  integer, public ::  ifs_shn      ! ifs spectral fields : number of coeff
  !
  logical, public :: refine_levels   ! do we send/receive all IFS levels? (then we need to "refine them" here)
  logical, public :: coupled_to_lpj  ! is TM5 coupled to LPJ-Guess?
  logical, public :: coupled_to_pis  ! is TM5 coupled to PISCES?
  !
  ! !PRIVATE DATA MEMBERS:
  !
  character(len=*), parameter :: mname = 'TM5_Prism'
  integer,          parameter :: len_grid_name = 4 ! oasis3: fixed length for gridname
  ! 
  integer ::  ifs_npes     ! ifs number of procs

  integer, parameter :: wp = SELECTED_REAL_KIND(12,307) ! working precision = double
  character(len=256) :: error_message
  !
  ! !PUBLIC TYPES:
  !
  TYPE, PUBLIC :: TshRemap
     !
     ! remapping: for each element in received grid, identify target indices:
     !
     !   remap(:,:,1)  :  1 = real part, 2 = imag part
     !   remap(:,:,2)  :  index in triangle : 1=(0,0) 2=(0,1) 3=(0,2) ... np=(m,n)
     !   remap(:,:,3)  :  level
     !
     ! Info array has values :  m*1000 + n + lev/100  and negative for imaginary part
     !
     ! receive spectral info every timestep to avoid memory growth
     type(TDate)      ::  t            ! store time of current info
     integer, pointer ::  remap(:,:,:) ! remapping indices
     integer          ::  shT          ! truncation
  END TYPE TshRemap
  
  TYPE, PUBLIC :: TCplVar                       ! --- TM Coupled Variable ---
     character(len=128)          ::  name       ! tm5 internal name
     character(len=128)          ::  cpl_name   ! short name used in rcfile
     integer, pointer            ::  var_id(:)  ! list of id return by oasis3 (one per level)
     character(len=128), pointer ::  var_name(:)! list of names used in the namcouple (one per level)
     logical                     ::  serial     ! serial transfer
     character(len=3)            ::  intent     ! in or out
     character(len=2)            ::  grid_type  ! spectral or gridpoint
     integer                     ::  region     !
     integer                     ::  nlev       ! 
     real                        ::  west_deg, dlon_deg, south_deg, dlat_deg ! lon/lat grids
     integer                     ::  nlon, nlat 
     integer                     ::  shT, shn, shn_recv ! spectral info
     integer                     ::  itr        ! tracer index if any
     logical                     ::  cache      ! cache
     type(TDate)                 ::  cache_tmid
     real, pointer               ::  cache_data(:,:,:) => null()
  END TYPE TCplVar

  ! --- var -----------------------------------

  integer, parameter          ::  maxcplvar = 165   ! max nb of coupled fields
  type(TCplVar), public, save ::  CplVar(maxcplvar) ! array of coupled fields
  integer,       public       ::  ncplvar           ! actual nb of coupled fields

  integer                     ::  region_glb, region_sfc

  character(len=1024)         ::  prism_get_list ! comma seperated lists of coupled fields
  character(len=1024)         ::  prism_put_list

  integer, allocatable        ::  part_id(:) 
  integer, allocatable        ::  var_shape(:,:)
  integer                     ::  sp_part_id 
  integer, allocatable        ::  sp_var_shape(:)
  !
  ! !INTERFACE:
  !
  interface Init
     module procedure shremap_Init
  end interface

  interface Done
     module procedure shremap_Done
  end interface

  interface Setup
     module procedure shremap_Setup
  end interface

  interface Remap
     module procedure shremap_Remap
  end interface

  interface SetPrismTime
     module procedure SetPrismTime_date
  end interface
  !
  ! !REVISION HISTORY: 
  !   10 Sep 2013 - Ph. Le Sager - cleanup, document, remove oasis4 stuff (can
  !                                always be retrieved with svn if needed)
  !    8 Oct 2013 - Ph. Le Sager - dummy CO2 exchange with LPJ-Guess
  !
  ! !REMARKS:
  !
  !EOP
  !------------------------------------------------------------------------

CONTAINS

  !--------------------------------------------------------------------------
  !                    TM5                                                  !
  !--------------------------------------------------------------------------
  !BOP
  !
  ! !IROUTINE:    TM5_PRISM_INIT
  !
  ! !DESCRIPTION: read coupling information from rc file.
  !\\
  !\\
  ! !INTERFACE:
  !
  SUBROUTINE TM5_Prism_Init( rcfile, status )
    !
    ! !USES:
    !
    use GO, only : TrcFile, Init, Done, ReadRc
    !
    ! !INPUT PARAMETERS:
    !
    character(len=*), intent(in)  ::  rcfile
    !
    ! !OUTPUT PARAMETERS:
    !
    integer,          intent(out) ::  status
    !
    ! !REMARKS:
    !
    !EOP
    !------------------------------------------------------------------------
    !BOC

    character(len=*), parameter ::  rname = mname//'/TM5_Prism_Init'

    type(TrcFile)      ::  rcF

    ! --- begin -----------------------------------

    ! * settings from rcfile

    call Init( rcF, rcfile, status )
    IF_NOTOK_RETURN(status=1)

    call ReadRc( rcF, 'ifs.cpl.nlev', ifs_cpl_nlev, status )
    IF_NOTOK_RETURN(status=1)

    call ReadRc( rcf, 'ifs.cpl.nlev.cutoff', ifs_cpl_nlev_cutoff, status )
    IF_NOTOK_RETURN(status=1)

    call ReadRc( rcF, 'ifs.shresol', ifs_shT, status )
    IF_NOTOK_RETURN(status=1)

    call ReadRc( rcF, 'cpl.ifs.period', ifs_cpl_freq, status )
    IF_NOTOK_RETURN(status=1)
    call ReadRc( rcF, 'cpl.lpj.period', lpj_cpl_freq, status )
    IF_NOTOK_RETURN(status=1)
    call ReadRc( rcF, 'cpl.pis.period', pis_cpl_freq, status )
    IF_NOTOK_RETURN(status=1)

    call ReadRc( rcF, 'prism.get', prism_get_list, status )
    IF_NOTOK_RETURN(status=1)

    call ReadRc( rcF, 'prism.put', prism_put_list, status )
    IF_NOTOK_RETURN(status=1)

    call ReadRc( rcF, 'coupled_to_lpjguess', coupled_to_lpj, status, default=.false. )
    IF_ERROR_RETURN(status=1)

    call ReadRc( rcF, 'coupled_to_pisces', coupled_to_pis, status, default=.false. )
    IF_ERROR_RETURN(status=1)

    select case (ifs_cpl_nlev)
    case (91,62)
       refine_levels=.true.
    case(34,31,10,4)
       refine_levels=.false.
    case default
       write(gol,*) " Wrong (sub)set of levels is exchanged between IFS and TM5 " ; call goErr 
       write(gol,*) " Either (4, 10 or 34 out of) 91, or (31 out of) 62"          ; call goErr 
       status=1
       TRACEBACK; return
    end select
       
    call Done( rcF, status )
    IF_NOTOK_RETURN(status=1)

    ! * spectral grids

    ifs_shn = (ifs_shT+1)*(ifs_shT+2)/2 ! number of coeff

    ! check that compilation was perform as expected with respect to optical feedback
#ifndef with_ecearth_optics
    if (index(prism_put_list,'AOD_01') /=0) then
      write(gol,*) "Feedback of aerosols optical properties requires 'with_ecearth_optics' cpp"; call goErr
      write(gol,*) "You must recompile TM5-MP with cpp defs 'with_ecearth_optics'"; call goErr
      write(gol,*) "This can be done in the config-build.xml file with the TM5_MDEFS_FFLAGS key."; call goErr
      status=1
      TRACEBACK; return
    endif
#endif
    
    status = 0

  END SUBROUTINE TM5_PRISM_INIT
  !EOC

  !--------------------------------------------------------------------------
  !                    TM5                                                  !
  !--------------------------------------------------------------------------
  !BOP
  !
  ! !IROUTINE:    TM5_PRISM_INIT2
  !
  ! !DESCRIPTION: prism grid writing, prism partition, init coupled variables
  !\\
  !\\
  ! !INTERFACE:
  !
  subroutine TM5_Prism_Init2( nreg_all, nreg, ireg_sfc, lli, levi, status )
    !
    ! !USES:
    !
    use Grid,         only : TllGridInfo, TLevelInfo
    use Grid,         only : TshGridInfo, Init, Done
#ifdef parallel_cplng
    use tm5_distgrid, only : dgrid, Get_DistGrid
#endif
    
    use GO,         only : NewDate, goReadFromLine
    use dims,       only : lm
    use chem_param, only : names, io3, ich4, ico2
    use partools,   only : isRoot
#ifdef with_m7
    use chem_param, only : inus_n, iso4nus, iais_n, iso4ais, ibcais, ipomais
    use chem_param, only : iacs_n, iso4acs, ibcacs, ipomacs, issacs, iduacs
    use chem_param, only : icos_n, iso4cos, ibccos, ipomcos, isscos, iducos
    use chem_param, only : iaii_n, ibcaii, ipomaii, iaci_n, iduaci, icoi_n, iducoi
    use chem_param, only : ino3_a, imsa
#endif
    !
    ! !INPUT PARAMETERS:
    !
    integer,           intent(in) ::  nreg_all
    integer,           intent(in) ::  nreg
    integer,           intent(in) ::  ireg_sfc
    type(TllGridInfo), intent(in) ::  lli(1:nreg_all)
    type(TLevelInfo),  intent(in) ::  levi
    !
    ! !OUTPUT PARAMETERS:
    !
    integer,          intent(out) ::  status
    !
    ! !REVISION HISTORY: 
    !    8 Oct 2013 - Ph. Le Sager - coupling with LPJG
    !
    ! !REMARKS:
    !
    !EOP
    !------------------------------------------------------------------------
    !BOC

    character(len=*), parameter ::  rname = mname//'/TM5_Prism_Init2'

    integer :: ireg, region, id, ivar, ilev, i1, j1, i2, j2

    integer, parameter                  ::  nc = 4  ! corners
    integer                             ::  nx, ny
    integer                             ::  i, j, k, m, n, z
    
    character(len=len_grid_name)        ::  point_name
    real(ip_realwp_p), allocatable      ::  lons(:,:), lats(:,:)
    real(ip_realwp_p), allocatable      ::  clons(:,:,:), clats(:,:,:)
    real(ip_realwp_p), allocatable      ::  area(:,:)
    integer, allocatable                ::  mask(:,:)

    character(len=len_grid_name)        ::  sp_point_name
    real(ip_realwp_p), allocatable      ::  sp_lons(:,:), sp_lats(:,:)
    integer, allocatable                ::  sp_mask(:,:)
    real(ip_realwp_p)                   ::  sp_dlon, sp_dlat

#ifdef parallel_cplng
    integer                             ::  part_val(1:5)
#else
    integer                             ::  part_val(1:3)
#endif
    integer                             ::  sp_part_val(1:3)

    character(len=128)          ::  cpl_name
    integer                     ::  var_nodims(2)
    integer                     ::  var_type
    integer(kind=ip_intwp_p)    ::  var_intent

    logical :: write_grid 
    
#ifdef parallel_cplng
    type(TllGridInfo) :: local_lli ! local Lat-Lon grid info
#endif

    
    ! --- begin -----------------------------------

    write (gol,'("initialize prism coupling:")'); call goPr
    write (gol,'("  component           : ",a)') trim(comp_name); call goPr

    ! store in module variables
    region_glb = 1
    region_sfc = ireg_sfc

    ! storage for variable shape:
    allocate( part_id(nreg_all) ) 
    allocate( var_shape(4,nreg_all) )
    allocate( sp_var_shape(4) )

    ! init to zero on all pe's
    part_id      = 0
    var_shape    = 0
    sp_part_id   = 0
    sp_var_shape = 0

    ! ============ oasis3 grid writing =================

    write_grid=.false. !! HARDCODED !!
    
    ! Define the grids by master proc
    if ( isroot .and. write_grid ) then

       call oasis_start_grids_writing( status )

       ! **** lon/lat grid
       do region = 1, nreg_all

          ! name of grid points
          if ( region == region_glb ) then
             ! global region
             point_name = 'CTM3'
          else if ( region == region_sfc ) then
             ! global surface grid:
             point_name = 'CTM1'
          else
             ! global grids only ...
             cycle
          end if

          write (gol,'("  define points ",a," ...")') point_name; call goPr

          ! grid size:
          nx = lli(region)%nlon
          ny = lli(region)%nlat

          write (gol,'("    region     : ",i6)') region; call goPr
          write (gol,'("    size       : ",2i6)') nx, ny; call goPr

          allocate(  lons(nx,ny) )
          allocate(  lats(nx,ny) )
          allocate( clons(nx,ny,nc) )
          allocate( clats(nx,ny,nc) )
          allocate(  area(nx,ny) )
          allocate(  mask(nx,ny) )

          ! set lon/lat grid (grid cell centers):
          do i = 1, nx
             lons(i,:) = lli(region)%lon_deg(i)
          end do
          do j = 1, ny
             lats(:,j) = lli(region)%lat_deg(j)
          end do

          call oasis_write_grid( point_name, nx, ny, lons, lats )

          ! set corner lon/lat:
          !    3 o o 2
          !    4 o o 1
          do i = 1, nx
             clons(i,:,1) = lli(region)%blon_deg(i  )
             clons(i,:,2) = lli(region)%blon_deg(i  )
             clons(i,:,3) = lli(region)%blon_deg(i-1)
             clons(i,:,4) = lli(region)%blon_deg(i-1)
          end do
          do j = 1, ny
             clats(:,j,1) = lli(region)%blat_deg(j-1)
             clats(:,j,2) = lli(region)%blat_deg(j  )
             clats(:,j,3) = lli(region)%blat_deg(j  )
             clats(:,j,4) = lli(region)%blat_deg(j-1)
          end do

          write (gol,'("    write corners ...")'); call goPr
          call oasis_write_corner( point_name, nx, ny, nc, clons, clats )

          ! land/sea mask
          mask = 0   ! not masked; gives warnings about 'sea-world' cplout ...
          
          write (gol,'("    write mask ...")'); call goPr
          call oasis_write_mask( point_name, nx, ny, mask )

          do j = 1, ny
             area(:,j) = lli(region)%area_m2(j)
          end do

          write (gol,'("    write area ...")'); call goPr
          call oasis_write_area( point_name, nx, ny, area )

          deallocate(  lons )
          deallocate(  lats )
          deallocate( clons )
          deallocate( clats )
          deallocate(  area )
          deallocate(  mask )

       end do  ! regions

       ! *** SPECTRAL GRID
       
       write(sp_point_name, '("C",i3.3)') ifs_shT

       write (gol,'("  define points ",a," ...")') trim(sp_point_name); call goPr

       allocate( sp_lons(2*ifs_shn,1) )
       allocate( sp_lats(2*ifs_shn,1) )
       allocate( sp_mask(2*ifs_shn,1) )

       !  Triangular storage:
       !
       !        NSMAX  *  *  ..   *
       !               :
       !
       !            1  *  *
       !         n  0  *
       !
       !               0  1   ..  NSMAX
       !               m "wavenumber"
       !
       ! dummy locations :  (n*2+z+0.5)*dlon, (m+0.5)*dlat
       !  where z=0 is real part and z=1 is imaginary part

       ! dummy spacing:
       sp_dlon = 0.1  ! degree
       sp_dlat = 0.1  ! degree

       ! index in coeff array:
       k = 0
       ! loop over global wavenumbers:
       do m = 0, ifs_shT
          ! loop over complex coeff:
          do n = m, ifs_shT
             ! loop over real/complex
             do z = 0, 1
                ! next coeff:
                k = k + 1
                ! cell centers:
                sp_lons(k,1) = -180.0 + (n*2+z+0.5) * sp_dlon
                sp_lats(k,1) =  -90.0 + (m    +0.5) * sp_dlat
                ! no mask:
                sp_mask(k,1) = 0   ! not masked
             end do   ! re,im
          end do  ! n
       end do  ! m
       
       call oasis_write_grid( sp_point_name, 2*ifs_shn, 1, sp_lons, sp_lats )
       call oasis_write_mask( sp_point_name, 2*ifs_shn, 1, sp_mask )

       deallocate( sp_lons )
       deallocate( sp_lats )
       deallocate( sp_mask )

       call oasis_terminate_grids_writing()

    else

       write (gol,'("  not necessary to write grids (not root) ...")'); call goPr

    end if  ! root and write_grid


    ! ============ Partition =================
        
    write (gol,'("  define partitions ...")'); call goPr

    ! *** LAT/LON
    
    reg: do region = 1, nreg_all

       if ( (region /= region_glb) .and. (region /= region_sfc) ) cycle    ! global grids only
       
       nx = lli(region)%nlon
       ny = lli(region)%nlat

#ifdef parallel_cplng
       call Get_DistGrid( dgrid(region), I_STRT=i1, I_STOP=i2 , J_STRT=j1, J_STOP=j2 )
       
       ! store shape:
       var_shape(1:2,region) = (/1,i2-i1+1/)
       var_shape(3:4,region) = (/1,j2-j1+1/)
       
       part_val(1) = 2
       part_val(2) = i1-1+(j1-1)*nx
       part_val(3) = i2-i1+1
       part_val(4) = j2-j1+1
       part_val(5) = nx
#else
       ! store shape:
       var_shape(1:2,region) = (/1,nx/)
       var_shape(3:4,region) = (/1,ny/)

       part_val(1) = 0 ! serial partition
       part_val(2) = 0
       part_val(3) = 0
       if ( isroot ) part_val(3) = nx*ny  ! total grid size
#endif
       
       status = OASIS_OK  ! <-- status was not set by PRISM_Def_Partition_Proto (is it still true in OASIS3-MCT?)

       call oasis_def_partition( part_id(region), part_val, status )

       if (status/=OASIS_OK) then
          write (error_message,'("from  OASIS_DEF_PARTITION : ",i6)') status
          TRACEBACK
          call oasis_abort( comp_id, rname, error_message )
       end if

#ifdef parallel_cplng
       write (gol,'("    partition : ",i6," ; ",5i6)') part_id(region), part_val; call goPr
#else
       write (gol,'("    partition : ",i6," ; ",3i6)') part_id(region), part_val; call goPr
#endif
    end do reg

    ! *** SPECTRAL

    sp_part_val(1) = 0
    sp_part_val(2) = 0
    sp_part_val(3) = 0
    if ( isroot ) sp_part_val(3) = ifs_shn*2  ! total grid size

    !status = OASIS_OK  ! <-- status was not set by PRISM_Def_Partition_Proto (is it still true in OASIS3-MCT?)

    call oasis_def_partition( sp_part_id, sp_part_val, status )

    if (status/=OASIS_OK) then
       write (error_message,'("from  OASIS_DEF_PARTITION : ",i6)') status
       TRACEBACK
       call oasis_abort( comp_id, rname, error_message )
    end if

    write (gol,'("    partition : ",i6," ; ",3i6)') sp_part_id, sp_part_val; call goPr
   
    ! -------------------------------------------------------------------------
    ! * CONFIGURE COUPLING FIELDS
    ! -------------------------------------------------------------------------
    !
    ! (0) DEFAULT
    !
    write (gol,'("  init cplvar list ...")'); call goPr
    
    var_nodims(1) = 2   ! rank of coupling field
    var_nodims(2) = 1   ! number of bundles in coupling field (always 1)
    var_type      = OASIS_Real

    do ivar = 1, size(CplVar)

       CplVar(ivar)%cpl_name = ''

       nullify( CplVar(ivar)%var_id   )
       nullify( CplVar(ivar)%var_name )

       CplVar(ivar)%grid_type = 'll'  ! lon/lat
       CplVar(ivar)%region    = -1
       CplVar(ivar)%nlev      = -1
#ifdef parallel_cplng
       CplVar(ivar)%serial    = .false.
#else
       CplVar(ivar)%serial    = .true.
#endif
       CplVar(ivar)%intent    = 'xxx'
       CplVar(ivar)%cache      = .false. ! at init, flag means "will use cache"
       CplVar(ivar)%cache_tmid = NewDate(year=9999)

       nullify( CplVar(ivar)%cache_data )
    end do

    !  Above init should be same as:
    !    CplVar = TCplVar('','',null(),null(),.true.,'xxx','ll',-1,-1,0.,0.,0.,0.,0,0,0,0,0,.false.,NewDate(year=9999),null())
    !  We could also just set pointers to  => null() in declaration l.117
    
    ncplvar = 0      ! no fields defined yet
    !
    ! (1) METEO VARIABLES
    !
    write (gol,'("  set meteo cplvars ...")'); call goPr
    write (gol,'("    list : ",a)') trim(prism_get_list); call goPr
    ivar = 0
    
    GET: DO

       if ( len_trim(prism_get_list) == 0 ) exit   ! leave if empty

       ! extract next name from list
       call goReadFromLine( prism_get_list, cpl_name, status, sep=',' )
       IF_NOTOK_RETURN(status=1)

       write (gol,'("    extracted ",a," ...")') trim(cpl_name); call goPr

       ivar = ivar + 1

       if ( ivar > maxcplvar ) then
          write (gol,'("ivar exceeds maxcplvar ",i6)') maxcplvar; call goErr
          TRACEBACK; status=1; return
       end if

       CplVar(ivar)%cpl_name = trim(cpl_name)
       CplVar(ivar)%intent   = 'in'

       select case ( trim(cpl_name) )
       case ( 'LNSP' )
          CplVar(ivar)%name      = 'LNSP'
          CplVar(ivar)%grid_type = 'sh'  ! spherical harmonics
          CplVar(ivar)%serial    = .true.
          CplVar(ivar)%nlev      = 1
          CplVar(ivar)%cache     = .true.
       case ( 'VOR' )
          CplVar(ivar)%name      = 'VO'
          CplVar(ivar)%grid_type = 'sh'  ! spherical harmonics
          CplVar(ivar)%serial    = .true.
          CplVar(ivar)%nlev      = ifs_cpl_nlev
          CplVar(ivar)%cache     = .true.
       case ( 'DIV' )
          CplVar(ivar)%name      = 'D'
          CplVar(ivar)%grid_type = 'sh'  ! spherical harmonics
          CplVar(ivar)%serial    = .true.
          CplVar(ivar)%nlev      = ifs_cpl_nlev
          CplVar(ivar)%cache     = .true.
       case ( 'SPRES' )
          CplVar(ivar)%name      = 'sp'
          CplVar(ivar)%region    = region_glb
          CplVar(ivar)%nlev      = 1
          CplVar(ivar)%cache     = .true.
       case ( 'TMP' )
          CplVar(ivar)%name     = 'T'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'HUM' )
          CplVar(ivar)%name     = 'Q'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'OROG' )
          CplVar(ivar)%name     = 'oro'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'CLW' )
          CplVar(ivar)%name     = 'CLWC'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'CIW')
          CplVar(ivar)%name     = 'CIWC'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'CC' )
          CplVar(ivar)%name     = 'CC'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'CCO' )
          CplVar(ivar)%name     = 'CCO'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'CCU' )
          CplVar(ivar)%name     = 'CCU'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'UMF' )
          CplVar(ivar)%name     = 'UDMF'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'DMF' )
          CplVar(ivar)%name     = 'DDMF'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'UDR' )
          CplVar(ivar)%name     = 'UDDR'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'DDR' )
          CplVar(ivar)%name     = 'DDDR'
          CplVar(ivar)%region   = region_glb
          CplVar(ivar)%nlev     = ifs_cpl_nlev
       case ( 'LSMSK' )
          CplVar(ivar)%name     = 'lsm'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'ALB' )
          CplVar(ivar)%name     = 'albedo'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'SR' )
          CplVar(ivar)%name     = 'sr'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'CI' )
          CplVar(ivar)%name     = 'ci'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'SST' )
          CplVar(ivar)%name     = 'sst'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'U10M' )
          CplVar(ivar)%name     = 'u10m'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'V10M' )
          CplVar(ivar)%name     = 'v10m'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'WSPD' )
          CplVar(ivar)%name     = 'wspd'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'SRC' )
          CplVar(ivar)%name     = 'src'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'D2M' )
          CplVar(ivar)%name     = 'd2m'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'T2M' )
          CplVar(ivar)%name     = 't2m'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'SSHF' )
          CplVar(ivar)%name     = 'sshf'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'SLHF' )
          CplVar(ivar)%name     = 'slhf'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'EWSS' )
          CplVar(ivar)%name     = 'ewss'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'NSSS' )
          CplVar(ivar)%name     = 'nsss'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'CP' )
          CplVar(ivar)%name     = 'cp'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'LSP' )
          CplVar(ivar)%name     = 'lsp'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'SSR' )
          CplVar(ivar)%name     = 'ssr'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'SKT__') 
          CplVar(ivar)%name     = 'skt'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'SF___' )
          CplVar(ivar)%name     = 'sf'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'SD' ) 
          CplVar(ivar)%name     = 'sd'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'SWVL1' ) 
          CplVar(ivar)%name     = 'swvl1'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV01' )
          CplVar(ivar)%name     = 'tv01'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV02' )
          CplVar(ivar)%name     = 'tv02'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV03' )
          CplVar(ivar)%name     = 'tv03'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV04' )
          CplVar(ivar)%name     = 'tv04'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV05' )
          CplVar(ivar)%name     = 'tv05'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV06' )
          CplVar(ivar)%name     = 'tv06'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV07' )
          CplVar(ivar)%name     = 'tv07'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV09' )
          CplVar(ivar)%name     = 'tv09'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV10' )
          CplVar(ivar)%name     = 'tv10'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV11' )
          CplVar(ivar)%name     = 'tv11'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV13' )
          CplVar(ivar)%name     = 'tv13'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV16' )
          CplVar(ivar)%name     = 'tv16'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV17' )
          CplVar(ivar)%name     = 'tv17'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV18' )
          CplVar(ivar)%name     = 'tv18'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'TV19' )
          CplVar(ivar)%name     = 'tv19'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'CVL' )
          CplVar(ivar)%name     = 'cvl'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case ( 'CVH' )
          CplVar(ivar)%name     = 'cvh'
          CplVar(ivar)%region   = region_sfc
          CplVar(ivar)%nlev     = 1
       case default
          write (gol,'("unsupported cpl_name : ",a)') trim(cpl_name); call goErr
          TRACEBACK; status=1; return
       end select
       
       ! check
       if ( CplVar(ivar)%nlev < 1 ) then
          write (gol,'("found nlev ",i6," in cplvar ",i4," (",a,")")') CplVar(ivar)%nlev, ivar, trim(cpl_name); call goErr
          TRACEBACK; status=1; return
       end if

       ! storage per level
       allocate( CplVar(ivar)%var_id  (CplVar(ivar)%nlev) )
       allocate( CplVar(ivar)%var_name(CplVar(ivar)%nlev) )

       ! name used in namcouple
       if ( CplVar(ivar)%nlev == 1 ) then
          ilev = 1
          write (CplVar(ivar)%var_name(ilev),'("C_",a)') trim(CplVar(ivar)%cpl_name)
          write (gol,'("      cplvar ",2i4,"  ",a)') ivar, ilev, trim(CplVar(ivar)%var_name(ilev)); call goPr      
       else
          do ilev = 1, CplVar(ivar)%nlev
             write (CplVar(ivar)%var_name(ilev),'("C_",a,".L",i3.3)') trim(CplVar(ivar)%cpl_name), ilev
             write (gol,'("      cplvar ",2i4,"  ",a)') ivar, ilev, trim(CplVar(ivar)%var_name(ilev)); call goPr      
          end do
       end if

       ! store latest number:
       ncplvar = ivar

    END DO GET  ! list coupled var to get
    !
    ! (2) VARIABLES SENT TO IFS
    !
    write (gol,'("  set concentration/optics coupled vars ...")'); call goPr
    write (gol,'("    list : ",a)') trim(prism_put_list); call goPr
    ivar = ncplvar

    PUT: DO
       if ( len_trim(prism_put_list) == 0 ) exit

       ! extract next name from list
       call goReadFromLine( prism_put_list, cpl_name, status, sep=',' )
       IF_NOTOK_RETURN(status=1)

       write (gol,'("    extracted ",a," ...")') trim(cpl_name); call goPr

       ivar = ivar + 1
       if ( ivar > maxcplvar ) then
          write (gol,'("ivar exceeds maxcplvar ",i6)') maxcplvar; call goErr
          TRACEBACK; status=1; return
       end if

       CplVar(ivar)%cpl_name = trim(cpl_name)
#ifdef parallel_cplng
       CplVar(ivar)%serial = .false.
#else
       CplVar(ivar)%serial = .true.
#endif
       CplVar(ivar)%intent = 'out'
       CplVar(ivar)%region = region_glb

       select case ( trim(cpl_name) )
       case ( 'O3', 'CH4', 'CO2' )
          ! send whole atmosphere for ozone, methane and CO2
          if (.not.refine_levels) then ! in both cases this should be ifs_cpl_nlev!
             CplVar(ivar)%nlev = lm(region_glb)
          else
             CplVar(ivar)%nlev = ifs_cpl_nlev
          endif
       case default
          ! for aerosols, do not send all levels in stratosphere
          ! this works, for refine_levels true or false
          CplVar(ivar)%nlev = ifs_cpl_nlev_cutoff
       end select
          
       select case ( trim(cpl_name) )
       case ( 'CO2' )
          CplVar(ivar)%itr = ico2
       case ( 'O3' )
          CplVar(ivar)%itr = io3
       case ( 'CH4' )
          CplVar(ivar)%itr = ich4
#ifdef with_m7
       case ( 'N1' )
          CplVar(ivar)%itr      = inus_n 
       case ( 'SU1' )
          CplVar(ivar)%itr      = iso4nus
       case ( 'N2' )
          CplVar(ivar)%itr      = iais_n
       case ( 'SU2' )
          CplVar(ivar)%itr      = iso4ais
       case ( 'BC2' )
          CplVar(ivar)%itr      = ibcais
       case ( 'OC2' )
          CplVar(ivar)%itr      = ipomais
       case ( 'N3' )
          CplVar(ivar)%itr      = iacs_n
       case ( 'SU3' )
          CplVar(ivar)%itr      = iso4acs
       case ( 'BC3' )
          CplVar(ivar)%itr      = ibcacs
       case ( 'OC3' )
          CplVar(ivar)%itr      = ipomacs
       case ( 'SS3' )
          CplVar(ivar)%itr      = issacs
       case ( 'DU3' )
          CplVar(ivar)%itr      = iduacs
       case ( 'N4' )
          CplVar(ivar)%itr      = icos_n
       case ( 'SU4' )
          CplVar(ivar)%itr      = iso4cos
       case ( 'BC4' )
          CplVar(ivar)%itr      = ibccos
       case ( 'OC4' )
          CplVar(ivar)%itr      = ipomcos
       case ( 'SS4' )
          CplVar(ivar)%itr      = isscos
       case ( 'DU4' )
          CplVar(ivar)%itr      = iducos
       case ( 'N5' )
          CplVar(ivar)%itr      = iaii_n
       case ( 'BC5' )
          CplVar(ivar)%itr      = ibcaii
       case ( 'OC5' )
          CplVar(ivar)%itr      = ipomaii
       case ( 'N6' )
          CplVar(ivar)%itr      = iaci_n
       case ( 'DU6' )
          CplVar(ivar)%itr      = iduaci
       case ( 'N7' )
          CplVar(ivar)%itr      = icoi_n
       case ( 'DU7' )
          CplVar(ivar)%itr      = iducoi
       case ( 'NO3' )
          CplVar(ivar)%itr      = ino3_a
       case ( 'MSA' )
          CplVar(ivar)%itr      = imsa
#endif
#ifdef with_ecearth_optics
       case ( 'AOD_01', 'AOD_02', 'AOD_03', 'AOD_04', 'AOD_05', 'AOD_06', 'AOD_07', &
            'AOD_08', 'AOD_09', 'AOD_10', 'AOD_11', 'AOD_12', 'AOD_13', 'AOD_14', &
            'SSA_01', 'SSA_02', 'SSA_03', 'SSA_04', 'SSA_05', 'SSA_06', 'SSA_07', &
            'SSA_08', 'SSA_09', 'SSA_10', 'SSA_11', 'SSA_12', 'SSA_13', 'SSA_14', &
            'ASF_01', 'ASF_02', 'ASF_03', 'ASF_04', 'ASF_05', 'ASF_06', 'ASF_07', &
            'ASF_08', 'ASF_09', 'ASF_10', 'ASF_11', 'ASF_12', 'ASF_13', 'ASF_14' )
#endif
       case default
          write (gol,'("unsupported cpl_name : ",a)') trim(cpl_name); call goErr
          TRACEBACK; status=1; return
       end select

       ! set name:
       select case ( trim(cpl_name) )
#ifdef with_ecearth_optics
       case ( 'AOD_01', 'AOD_02', 'AOD_03', 'AOD_04', 'AOD_05', 'AOD_06', 'AOD_07', &
            'AOD_08', 'AOD_09', 'AOD_10', 'AOD_11', 'AOD_12', 'AOD_13', 'AOD_14', &
            'SSA_01', 'SSA_02', 'SSA_03', 'SSA_04', 'SSA_05', 'SSA_06', 'SSA_07', &
            'SSA_08', 'SSA_09', 'SSA_10', 'SSA_11', 'SSA_12', 'SSA_13', 'SSA_14', &
            'ASF_01', 'ASF_02', 'ASF_03', 'ASF_04', 'ASF_05', 'ASF_06', 'ASF_07', &
            'ASF_08', 'ASF_09', 'ASF_10', 'ASF_11', 'ASF_12', 'ASF_13', 'ASF_14' )
          write(CplVar(ivar)%name,'(a)') trim(cpl_name)
#endif
       case default
          CplVar(ivar)%name       = names(CplVar(ivar)%itr)
       end select
       
       ! check ..
       if ( CplVar(ivar)%nlev < 1 ) then
          write (gol,'("found nlev ",i6," in cplvar ",i4," (",a,")")') CplVar(ivar)%nlev, ivar, trim(cpl_name); call goErr
          TRACEBACK; status=1; return
       end if

       ! storage per level
       allocate( CplVar(ivar)%var_id  (CplVar(ivar)%nlev) )
       allocate( CplVar(ivar)%var_name(CplVar(ivar)%nlev) )

       ! name used in namcouple
       if ( CplVar(ivar)%nlev == 1 ) then
          ilev = 1
          write (CplVar(ivar)%var_name(ilev),'(a,"TM5")') trim(CplVar(ivar)%cpl_name)
          write (gol,'("      cplvar ",2i4,"  ",a)') ivar, ilev, trim(CplVar(ivar)%var_name(ilev)); call goPr      
       else
          do ilev = 1, CplVar(ivar)%nlev
             write (CplVar(ivar)%var_name(ilev),'("C_",a,".L",i3.3)') trim(CplVar(ivar)%cpl_name), ilev
          end do
          write (gol,'("      cplvar ",2i4,"  ",a)') ivar, ilev-1, trim(CplVar(ivar)%var_name(ilev-1)); call goPr
       end if

       ncplvar = ivar

    END DO PUT  ! list with coupled names of var to send to IFS
    !
    ! (3) COUPLING WITH LPJG
    !
    if (coupled_to_lpj) then

       ! Sent to LPJ-Guess       
       ivar = ncplvar + 1

       if ( ivar > maxcplvar ) then
          write (gol,'("ivar exceeds maxcplvar ",i6)') maxcplvar; call goErr
          TRACEBACK; status=1; return
       end if

       CplVar(ivar)%cpl_name = 'co2_for_lpjg'
       CplVar(ivar)%itr    = ico2
       CplVar(ivar)%name   = 'ppmCO2'  ! Reserve names(CplVar(ivar)%itr) for tracer mass
#ifdef parallel_cplng
       CplVar(ivar)%serial = .false.
#else
       CplVar(ivar)%serial = .true.
#endif
       CplVar(ivar)%intent = 'out'
       CplVar(ivar)%region = region_glb
       CplVar(ivar)%nlev   = 1

       allocate( CplVar(ivar)%var_id  (1) )
       allocate( CplVar(ivar)%var_name(1) )

       CplVar(ivar)%var_name(1) = "LCO2_TM5" ! Land CO2

       write (gol,'("      cplvar ",2i4,"  ",a)') ivar, ilev, trim(CplVar(ivar)%var_name(1)); call goPr      
       
       ! Received from LPJ-Guess
       ivar = ivar + 1
       
       if ( ivar > maxcplvar ) then
          write (gol,'("ivar exceeds maxcplvar ",i6)') maxcplvar; call goErr
          TRACEBACK; status=1; return
       end if
 
       CplVar(ivar)%cpl_name = 'land_c_flux_nat'
       CplVar(ivar)%name   = 'land_c_flux_nat'
#ifdef parallel_cplng
       CplVar(ivar)%serial = .false.
#else
       CplVar(ivar)%serial = .true.
#endif
       CplVar(ivar)%intent = 'in'
       CplVar(ivar)%region = region_glb
       CplVar(ivar)%nlev   = 1
       CplVar(ivar)%itr    = ico2
 
       allocate( CplVar(ivar)%var_id  (1) )
       allocate( CplVar(ivar)%var_name(1) )
 
       CplVar(ivar)%var_name(1) = "TM5_LandCNAT"
 
       write (gol,'("      cplvar ",2i4,"  ",a)') ivar, ilev, trim(CplVar(ivar)%var_name(1)); call goPr      
 
       ivar = ivar + 1
 
       if ( ivar > maxcplvar ) then
          write (gol,'("ivar exceeds maxcplvar ",i6)') maxcplvar; call goErr
          TRACEBACK; status=1; return
       end if
 

       CplVar(ivar)%cpl_name = 'land_c_flux_ant'
       CplVar(ivar)%name   = 'land_c_flux_ant'
#ifdef parallel_cplng
       CplVar(ivar)%serial = .false.
#else
       CplVar(ivar)%serial = .true.
#endif
       CplVar(ivar)%intent = 'in'
       CplVar(ivar)%region = region_glb
       CplVar(ivar)%nlev   = 1
       CplVar(ivar)%itr    = ico2
 
       allocate( CplVar(ivar)%var_id  (1) )
       allocate( CplVar(ivar)%var_name(1) )
 
       CplVar(ivar)%var_name(1) = "TM5_LandCANT"
 
       write (gol,'("      cplvar ",2i4,"  ",a)') ivar, ilev, trim(CplVar(ivar)%var_name(1)); call goPr      
 
       ivar = ivar + 1
 
       if ( ivar > maxcplvar ) then
          write (gol,'("ivar exceeds maxcplvar ",i6)') maxcplvar; call goErr
          TRACEBACK; status=1; return
       end if
 
       CplVar(ivar)%cpl_name = 'land_c_npp'
       CplVar(ivar)%name   = 'land_c_npp'
#ifdef parallel_cplng
       CplVar(ivar)%serial = .false.
#else
       CplVar(ivar)%serial = .true.
#endif
       CplVar(ivar)%intent = 'in'
       CplVar(ivar)%region = region_glb
       CplVar(ivar)%nlev   = 1
       CplVar(ivar)%itr    = 999
 
       allocate( CplVar(ivar)%var_id  (1) )
       allocate( CplVar(ivar)%var_name(1) )
 
       CplVar(ivar)%var_name(1) = "TM5_LandCNPP"
 
       write (gol,'("      cplvar ",2i4,"  ",a)') ivar, ilev, trim(CplVar(ivar)%var_name(1)); call goPr
       
       ncplvar = ivar
    end if
    !
    ! (4) COUPLING WITH PISCES
    !
    if (coupled_to_pis) then

       ! Sent to PISCES       
       ivar = ncplvar + 1

       if ( ivar > maxcplvar ) then
          write (gol,'("ivar exceeds maxcplvar ",i6)') maxcplvar; call goErr
          TRACEBACK; status=1; return
       end if

       CplVar(ivar)%cpl_name = 'co2_for_pis'
       CplVar(ivar)%itr    = ico2
       CplVar(ivar)%name   = 'ppmCO2'  ! Reserve names(CplVar(ivar)%itr) for tracer mass
#ifdef parallel_cplng
       CplVar(ivar)%serial = .false.
#else
       CplVar(ivar)%serial = .true.
#endif
       CplVar(ivar)%intent = 'out'
       CplVar(ivar)%region = region_glb
       CplVar(ivar)%nlev   = 1

       allocate( CplVar(ivar)%var_id  (1) )
       allocate( CplVar(ivar)%var_name(1) )

       CplVar(ivar)%var_name(1) = "OCO2_TM5" ! Ocean CO2

       write (gol,'("      cplvar ",2i4,"  ",a)') ivar, ilev, trim(CplVar(ivar)%var_name(1)); call goPr      
       
       ! Received from PISCES
       ivar = ivar + 1
       
       if ( ivar > maxcplvar ) then
          write (gol,'("ivar exceeds maxcplvar ",i6)') maxcplvar; call goErr
          TRACEBACK; status=1; return
       end if
 
       CplVar(ivar)%cpl_name = 'oce_c_flux' ! C fluxes from Ocean
       CplVar(ivar)%name   = 'oce_c_flux'
#ifdef parallel_cplng
       CplVar(ivar)%serial = .false.
#else
       CplVar(ivar)%serial = .true.
#endif
       CplVar(ivar)%intent = 'in'
       CplVar(ivar)%region = region_glb
       CplVar(ivar)%nlev   = 1
       CplVar(ivar)%itr    = 999

       allocate( CplVar(ivar)%var_id  (1) )
       allocate( CplVar(ivar)%var_name(1) )

       CplVar(ivar)%var_name(1) = "TM5_OceCFLX"

       write (gol,'("      cplvar ",2i4,"  ",a)') ivar, ilev, trim(CplVar(ivar)%var_name(1)); call goPr

       ncplvar = ivar
    end if
    !
    ! (5) DEFINE OASIS VARIABLES
    !
    write (gol,'("  define oasis variables ...")'); call goPr

    do ivar = 1, ncplvar

       ireg = CplVar(ivar)%region

       select case ( CplVar(ivar)%intent ) 
       case ( 'in' )
          var_intent = OASIS_In
       case ( 'out' )
          var_intent = OASIS_Out
       case default
          write (gol,'("unsupported intent : ",a)') trim(CplVar(ivar)%intent); call goErr
          TRACEBACK; status=1; return
       end select

       do ilev = 1, CplVar(ivar)%nlev

          select case ( CplVar(ivar)%grid_type )

          case ( 'sh' )
             !DBG write (gol,'("    ",i4," (",i3,") spectral variable ",a," ...")') ivar, ilev, trim(CplVar(ivar)%var_name(ilev)); call goPr
             !DBG write (gol,'("                region    : ",i6)'  ) ireg                ; call goPr
             !DBG write (gol,'("                partition : ",i6)'  ) sp_part_id          ; call goPr
             !DBG write (gol,'("                nodims    : ",2i6)' ) var_nodims          ; call goPr
             !DBG write (gol,'("                shape     : ",4i6)' ) sp_var_shape(1:4)   ; call goPr
             call oasis_def_var( &
                  CplVar(ivar)%var_id(ilev), &
                  trim(CplVar(ivar)%var_name(ilev)), &
                  sp_part_id, var_nodims, var_intent, &
                  sp_var_shape(1:4), var_type, status )
             IF_PRISM_NOTOK_RETURN(status=1)

          case ( 'll' )
             !DBG write (gol,'("    ",i4," (",i3,") gridded variable ",a," ...")') ivar, ilev, trim(CplVar(ivar)%var_name(ilev)); call goPr
             !DBG write (gol,'("                region    : ",i6)'  ) ireg                ; call goPr
             !DBG write (gol,'("                partition : ",i6)'  ) part_id(ireg)       ; call goPr
             !DBG write (gol,'("                nodims    : ",2i6)' ) var_nodims          ; call goPr
             !DBG write (gol,'("                shape     : ",4i6)' ) var_shape(1:4,ireg) ; call goPr
             call oasis_def_var( &
                  CplVar(ivar)%var_id(ilev), &
                  trim(CplVar(ivar)%var_name(ilev)), &
                  part_id(ireg), var_nodims, var_intent, &
                  var_shape(1:4,ireg), var_type, status )
             IF_PRISM_NOTOK_RETURN(status=1)

          case default
             write (gol,'("unsupported grid_type : ",a)') trim(CplVar(ivar)%grid_type); call goErr
             TRACEBACK; status=1; return
          end select

       end do   ! levels
    end do  ! var
    !
    ! (6) STORE GRID INFO
    !
    write (gol,'("add grid info to cplvars ...")'); call goPr

    do ivar = 1, ncplvar
    do ilev = 1, CplVar(ivar)%nlev
    
       select case ( CplVar(ivar)%grid_type )
       case ( 'sh' )
          CplVar(ivar)%shT      = ifs_shT
          CplVar(ivar)%shn      = ifs_shn
          CplVar(ivar)%shn_recv = ifs_shn
          if ( CplVar(ivar)%cache ) allocate( CplVar(ivar)%cache_data(2,CplVar(ivar)%shn,CplVar(ivar)%nlev) )
       case ( 'll' )
#ifdef parallel_cplng
          call Get_DistGrid( dgrid(CplVar(ivar)%region), lli=local_lli)
          CplVar(ivar)%west_deg  = local_lli%lon_deg(1)
          CplVar(ivar)%south_deg = local_lli%lat_deg(1)
          CplVar(ivar)%dlon_deg  = local_lli%dlon_deg
          CplVar(ivar)%dlat_deg  = local_lli%dlat_deg
          CplVar(ivar)%nlon      = local_lli%nlon
          CplVar(ivar)%nlat      = local_lli%nlat
          if ( CplVar(ivar)%cache ) &
               allocate( CplVar(ivar)%cache_data(CplVar(ivar)%nlon, CplVar(ivar)%nlat, CplVar(ivar)%nlev) )
#else
          CplVar(ivar)%west_deg  = lli(CplVar(ivar)%region)%lon_deg(1)
          CplVar(ivar)%south_deg = lli(CplVar(ivar)%region)%lat_deg(1)
          CplVar(ivar)%dlon_deg  = lli(CplVar(ivar)%region)%dlon_deg
          CplVar(ivar)%dlat_deg  = lli(CplVar(ivar)%region)%dlat_deg
          CplVar(ivar)%nlon      = lli(CplVar(ivar)%region)%nlon
          CplVar(ivar)%nlat      = lli(CplVar(ivar)%region)%nlat
          if ( CplVar(ivar)%cache ) &
               allocate( CplVar(ivar)%cache_data(CplVar(ivar)%nlon,CplVar(ivar)%nlat,CplVar(ivar)%nlev) )
#endif
       case default
          write (gol,'("unsupported grid_type : ",a)') trim(CplVar(ivar)%grid_type); call goErr
          TRACEBACK; status=1; return
       end select
       
    end do ! levels
    end do ! var
    !
    ! (7) FINALISE
    !
    call oasis_enddef( status )       
    if (status/=OASIS_OK) then
       write (error_message,'("from  OASIS_ENDDEF : ",i6)') status
       TRACEBACK
       call oasis_abort( comp_id, rname, error_message )
    end if

    if (isRoot) then
       write (gol,'(" ")'                           )                 ; call goPr
       write (gol,'("initialized oasis coupling:")' )                 ; call goPr
       write (gol,'("  component           : ",a)'  ) trim(comp_name) ; call goPr
       write (gol,'("  real kind           : ",i4)' ) wp              ; call goPr
       write (gol,'(" ")'                           )                 ; call goPr
    end if
    
    status = 0

  END SUBROUTINE TM5_PRISM_INIT2
  !EOC

  !--------------------------------------------------------------------------
  !                    TM5                                                  !
  !--------------------------------------------------------------------------
  !BOP
  !
  ! !IROUTINE:    TM5_PRISM_DONE
  !
  ! !DESCRIPTION: cleanup (ie deallocate).
  !\\
  !\\
  ! !INTERFACE:
  !
  SUBROUTINE TM5_Prism_Done( status )
    !
    ! !OUTPUT PARAMETERS:
    !
    integer, intent(out) :: status
    !
    ! !REVISION HISTORY: 
    !   10 Sep 2013 - Ph. Le Sager -
    !
    ! !REMARKS:
    !
    !EOP
    !------------------------------------------------------------------------
    !BOC

    character(len=*), parameter ::  rname = mname//'/TM5_Prism_Done'

    integer     ::  ireg
    integer     ::  ivar

    ! --- begin -----------------------------------

    deallocate( part_id )
    deallocate( var_shape )
    deallocate( sp_var_shape )

    ! clear descriptions:
    do ivar = 1, ncplvar

       deallocate( CplVar(ivar)%var_id   )
       deallocate( CplVar(ivar)%var_name )
       
       if ( associated(CplVar(ivar)%cache_data) ) deallocate( CplVar(ivar)%cache_data )
    end do

    status = 0

  END SUBROUTINE TM5_PRISM_DONE
  !EOC

  !--------------------------------------------------------------------------
  !                    TM5                                                  !
  !--------------------------------------------------------------------------
  !BOP
  !
  ! !IROUTINE:    InqCplVar
  !
  ! !DESCRIPTION: Inquire if there is a coupled variable with 'name'. 
  !\\
  !\\
  ! !INTERFACE:
  !
  SUBROUTINE InqCplVar( name, status, ivar, var_id, var_name, nlev )
    !
    ! !INPUT PARAMETERS:
    !
    character(len=*), intent(in)            ::  name    
    !
    ! !OUTPUT PARAMETERS:
    !
    integer,          intent(out)           ::  status
    integer,          intent(out), optional ::  ivar
    integer,          intent(out), optional ::  var_id(:)
    character(len=*), intent(out), optional ::  var_name(:)
    integer,          intent(out), optional ::  nlev
    !
    ! !REVISION HISTORY: 
    !   10 Sep 2013 - Ph. Le Sager -
    !
    ! !REMARKS:
    !
    !EOP
    !------------------------------------------------------------------------
    !BOC

    character(len=*), parameter ::  rname = mname//'/InqCplVar'

    integer     ::  i, iv

    ! --- begin -----------------------------------

    ! loop over defined variables:
    iv = -1
    do i = 1, ncplvar
       ! check name:
       if ( trim(name) == trim(CplVar(i)%name) ) then
          iv = i
          exit
       end if
    end do
    ! not found ?
    if ( iv < 0 ) then
       write (gol,'("name of cplvar not found : ",a)') trim(name) ; call goErr
       write (gol,'("  available names : ")'         )            ; call goErr
       do i = 1, ncplvar
          write (gol,'("  ",i4,"  ",a)') i, trim(CplVar(i)%name)  ; call goErr
       end do
    end if

    ! fill requested arguments:
    if ( present(ivar    ) ) ivar     = iv
    if ( present(var_id  ) ) var_id   = CplVar(iv)%var_id
    if ( present(var_name) ) var_name = CplVar(iv)%var_name
    if ( present(nlev    ) ) nlev     = CplVar(iv)%nlev

    ! ok
    status = 0

  END SUBROUTINE InqCplVar
  !EOC

  ! **************************************************************************
  ! ***
  ! *** spectral field remapping routines
  ! ***
  ! **************************************************************************
  
  !--------------------------------------------------------------------------
  !                    TM5                                                  !
  !--------------------------------------------------------------------------
  !BOP
  !
  ! !IROUTINE:    SHREMAP_INIT
  !
  ! !DESCRIPTION: Init TshRemap object
  !\\
  !\\
  ! !INTERFACE:
  !
  SUBROUTINE SHREMAP_INIT( shR, status )
    !
    ! !USES:
    !
    use GO, only : NewDate
    !
    ! !OUTPUT PARAMETERS:
    !
    type(TshRemap), intent(out) ::  shR
    integer,        intent(out) ::  status
    !
    ! !REMARKS:
    !
    !EOP
    !------------------------------------------------------------------------
    !BOC

    character(len=*), parameter ::  rname = mname//'/shremap_Init'

    ! --- begin ---------------------------------------

    ! no time stored yet:
    shR%t = NewDate(9999,9,9)

    ! safety:
    nullify( shR%remap )

    ! nu truncation determined yet:
    shR%shT = 0

    status = 0

  END SUBROUTINE SHREMAP_INIT
  !EOC

  !--------------------------------------------------------------------------
  !                    TM5                                                  !
  !--------------------------------------------------------------------------
  !BOP
  !
  ! !IROUTINE:    SHREMAP_DONE
  !
  ! !DESCRIPTION: deallocate var
  !\\
  !\\
  ! !INTERFACE:
  !
  SUBROUTINE SHREMAP_DONE( shR, status )
    !
    ! !INPUT/OUTPUT PARAMETERS:
    !
    type(TshRemap), intent(inout) :: shR
    !
    ! !OUTPUT PARAMETERS:
    !
    integer,        intent(out)   :: status
    !
    ! !REMARKS:
    !
    !EOP
    !------------------------------------------------------------------------
    !BOC

    character(len=*), parameter ::  rname = mname//'/shremap_Done'

    ! --- begin ---------------------------------------

    if ( associated(shR%remap) ) deallocate( shR%remap )

    status = 0

  END SUBROUTINE SHREMAP_DONE
  !EOC

  !--------------------------------------------------------------------------
  !                    TM5                                                  !
  !--------------------------------------------------------------------------
  !BOP
  !
  ! !IROUTINE:    SHREMAP_SETUP
  !
  ! !DESCRIPTION: 
  !\\
  !\\
  ! !INTERFACE:
  !
  SUBROUTINE SHREMAP_SETUP( shR, spinf, spinf_nan, status )
    !
    ! !INPUT/OUTPUT PARAMETERS:
    !
    type(TshRemap), intent(inout) ::  shR
    !
    ! !INPUT PARAMETERS:
    !
    real,           intent(in)    ::  spinf(:,:,:)  ! spectral info field
    real,           intent(in)    ::  spinf_nan     ! not-a-number in spinf
    !
    ! !OUTPUT PARAMETERS:
    !
    integer,        intent(out)   ::  status
    !
    ! !REMARKS:
    !
    !EOP
    !------------------------------------------------------------------------
    !BOC

    character(len=*), parameter ::  rname = mname//'/shremap_Setup'

    integer                   ::  nlev
    integer                   ::  sh_tripos(0:ifs_shT,0:ifs_shT)
    integer                   ::  vri, vm, vn, vp, vk
    logical, allocatable      ::  sh_field(:,:,:)
    integer                   ::  i, j, k
    real                      ::  val
    integer                   ::  nzero, nerr

    ! --- begin ---------------------------------------

    ! number of levels:
    nlev = size(spinf,2)

    ! triangle position:
    sh_tripos = 0
    vp = 0
    do vm = 0, ifs_shT
       do vn = vm, ifs_shT
          vp = vp + 1
          sh_tripos(vm,vn) = vp
       end do
    end do

    ! storage for mapping indices:
    if ( .not. associated(shR%remap) ) then  
       allocate( shR%remap(ifs_shn*2,nlev,3) )
    end if
    shR%remap = -1

    ! flags for target values; not filled remains negative:
    allocate( sh_field(2,ifs_shn,nlev) )
    sh_field = .false.

    ! loop over levels:
    do k = 1, nlev

       ! no zero's detected yet ...
       nzero = 0

       ! loop over spectral elements in layer:
       do i = 1, ifs_shn*2

          !if (k==1) then
          !write (gol,'("  k, i, spinf : ",2i6,f16.4)') k, i, spinf(i,k,1); call goPr
          !endif

          ! not a number ? then this is an extra element due to the partitioning
          if ( spinf(i,k,1) == spinf_nan ) cycle

          ! extract m, n, and level:
          !
          !  OLD :  mmmnnnkk.0     real part
          !         mmmnnnkk.5     imag part
          !
          !vri = 1                              ! real part
          !if ( spinf(i,k,1)-floor(spinf(i,k,1)) == 0.5 ) vri = 2   ! imaginary part
          !vk = modulo( floor(spinf(i,k,1)),    100 )                 ! level
          !vn = modulo( floor((spinf(i,k,1)-vk)/100.0), 1000 )        ! n
          !vm = floor(spinf(i,k,1)/100000.0)                          ! m
          !
          !  NEW :    mmmnnn.kk   real part
          !          -mmmnnn.kk   imag part
          !
          ! Note that real and imag for m=0,n=0 are both 000000.00 for nlev=1;
          ! for nlev > 1, the values are both 000000.01 
          !
          val = spinf(i,k,1)
          if ( val > 0.0 ) then
             ! positive value means real part:
             vri = 1
          else if ( val < 0.0 ) then
             ! negative value means imag part:
             vri = 2
          else
             ! zero values for both real and imag part of (0,0)
             nzero = nzero + 1  ! counter for number of zero values found
             !--
             !! test number of zero values:
             !select case ( nzero )
             !  case ( 1 ) ;  vri = 1   ! real part of (0,0)
             !  case ( 2 ) ;  vri = 2   ! imag part of (0,0)
             !  case default
             !    write (gol,'("found more than 2 zero values in spectral info, ")'); call goErr
             !    write (gol,'("while only expected for real and imag part of (0,0)")'); call goErr
             !    TRACEBACK; status=1; return
             !    cycle  ! next value from received array
             !end select
             !-- 
             ! assume that the extra zero's are the imaginary part for m=0,
             ! which is zero anyway and does not need to be received:
             if ( (nzero == 1) .and. (nlev == 1) ) then
                vri = 1   ! real part of (0,0) in spinf2d
             else
                cycle  ! next value from received array
             end if
          end if
          val = abs(val)
          vk = nint( ( val - floor(val) )*100.0 )   ! level is fractional part
          vn = modulo( floor(val), 1000 )           ! last 3 numbers is n
          vm = floor( val/1000.0 )                  ! first 3 numbers is m

          ! trap surface level ...
          if ( nlev == 1 ) vk = vk + 1

          ! check ...
          if ( (vri < 1) .or. (vri > 2) .or. &
               (vm < 0) .or. (vm > ifs_shT) .or. (vn < vm) .or. (vn > ifs_shT) .or. &
               ((nlev==1) .and. (vk/=1)) .or. &
               ((nlev>1) .and. ((vk < 1) .or. (vk > nlev))) ) then
             write (gol,'("strange values extracted from spectral info value:")') ; call goErr
             write (gol,'("  spinf    : ",f16.4)'                 ) spinf(i,k,1)  ; call goErr
             write (gol,'("    ri     : ",i4," (1=real,2=imag)")' ) vri           ; call goErr
             write (gol,'("    m      : ",i4," (0 .. ",i4,")")'   ) vm, ifs_shT   ; call goErr
             write (gol,'("    n      : ",i4," (m .. ",i4,")")'   ) vn, ifs_shT   ; call goErr
             write (gol,'("    k      : ",i4," (1 .. ",i4,")")'   ) vk, nlev      ; call goErr
             write (gol,'("    nzero  : ",i4)'                    ) nzero         ; call goErr
             TRACEBACK; status=1; return
          end if

          ! position in triangle:
          vp = sh_tripos(vm,vn)
          ! check ...
          if ( (vp < 1) .or. (vp > ifs_shn) ) then
             write (gol,'("strange triangle position:")' )         ; call goErr
             write (gol,'("  ifs T  : ",i4)'             ) ifs_shT ; call goErr
             write (gol,'("  m      : ",i4)'             ) vm      ; call goErr
             write (gol,'("  n      : ",i4)'             ) vm      ; call goErr
             write (gol,'("  p      : ",i8)'             ) vp      ; call goErr
             TRACEBACK; status=1; return
          end if

          ! store:
          shR%remap(i,k,1) = vri
          shR%remap(i,k,2) = vp
          shR%remap(i,k,3) = vk

          ! maximum truncation:
          shR%shT = max( shR%shT, max( vm, vn ) )

          ! flag ...
          sh_field(shR%remap(i,k,1),shR%remap(i,k,2),shR%remap(i,k,3)) = .true.

       end do  ! received coeff i
    end do  ! level k

    ! check on missing target values:
    if ( .not. all(sh_field) ) then
       ! error counter:
       nerr = 0
       ! loop over levels:
       do k = 1, nlev
          ! init triangle position counter:
          vp = 0
          ! loop over spectral triangle:
          do vm = 0, ifs_shT
             do vn = vm, ifs_shT
                ! increase triangle position counter:
                vp = vp + 1
                ! negative values at unexpected places ?
                if ( ( (vm==0) .and. (.not.     sh_field(1,vp,k) ) ) .or. &
                     ( (vm> 0) .and. (.not. all(sh_field(:,vp,k))) )         ) then
                   ! increase error counter:
                   nerr = nerr + 1
                   ! intro message ?
                   if ( nerr == 1 ) then
                      write (gol,'("not all sh target values filled :")'); call goErr
                      write (gol,'("  ifs T  : ",i4)') ifs_shT; call goErr
                   end if
                   ! show error:
                   write (gol,'("  (m, n) p, ; k ; real imag   :   (",2i5,") ",i8," ; ",i4," ; ",2l2)') vm, vn, vp, k, sh_field(:,vp,k); call goErr
                end if  ! negatives ?
             end do ! n
          end do ! m
       end do ! level
       ! leave ?
       if (nerr>0) then
          TRACEBACK; status=1; return
       end if
    end if ! some negatives ?

    ! done
    deallocate( sh_field )
    status = 0

  END SUBROUTINE SHREMAP_SETUP
  !EOC

  !--------------------------------------------------------------------------
  !                    TM5                                                  !
  !--------------------------------------------------------------------------
  !BOP
  !
  ! !IROUTINE:    SHREMAP_REMAP
  !
  ! !DESCRIPTION: 
  !\\
  !\\
  ! !INTERFACE:
  !
  SUBROUTINE SHREMAP_REMAP( shR, sh_recv, shi, sh_ri, status )
    !
    ! !USES:
    !
    use grid, only : TshGridInfo
    !
    ! !INPUT/OUTPUT PARAMETERS:
    !
    type(TshRemap),  intent(inout) :: shR
    !
    ! !INPUT PARAMETERS:
    !
    real,               intent(in) :: sh_recv(:,:,:)
    type(TshGridInfo),  intent(in) :: shi
    !
    ! !OUTPUT PARAMETERS:
    !
    real,              intent(out) :: sh_ri(:,:,:)
    integer,           intent(out) :: status
    !
    ! !REMARKS:
    !
    !EOP
    !------------------------------------------------------------------------
    !BOC

    character(len=*), parameter ::  rname = mname//'/shremap_Remap'

    integer :: nlev, i, k

    ! --- begin ---------------------------------------

    ! number of levels:
    nlev = size(sh_recv,2)

    ! check shape of input array ...
    if ( any( shape(sh_recv) /= (/ifs_shn*2,nlev,1/) ) ) then
       write (gol,'("strange input shape :")' )                       ; call goErr
       write (gol,'("  sh_recv    : ",3i6)'   ) shape(sh_recv)        ; call goErr
       write (gol,'("  expected   : ",3i6)'   ) ifs_shn*2,nlev,1 ; call goErr
       TRACEBACK; status=1; return
    end if

    ! check shape of output array ...
    if ( any( shape(sh_ri) /= (/2,ifs_shn,nlev/) ) ) then
       write (gol,'("strange input shape :")' )                ; call goErr
       write (gol,'("  sh         : ",3i6)'   ) shape(sh_ri)   ; call goErr
       write (gol,'("  expected   : ",3i6)'   ) 2,ifs_shn,nlev ; call goErr
       TRACEBACK; status=1; return
    end if

    ! initial zero:
    sh_ri = 0.0

    ! loop over all elements of received array:
    do k = 1, nlev
       do i = 1, ifs_shn*2
          ! the triplet  shR%remap(i,k,:)  defines  (/ 1=real/2=imag, traingle-position, level /)
          ! all negative ? 
          !  o this is a dummy element due to partitioning
          !  o this is the imaginary part for m=0, which should remain zero
          if ( all( shR%remap(i,k,:) < 0 ) ) cycle
          ! any negative ? should not be possible...
          if ( any( shR%remap(i,k,:) < 0 ) ) then
             write (gol,'("found strange mapping:")'  )                  ; call goErr
             write (gol,'("  triangle point : ",i6)'  ) i                ; call goErr
             write (gol,'("  level          : ",i6)'  ) k                ; call goErr
             write (gol,'("  mapping        : ",3i6)' ) shR%remap(i,k,:) ; call goErr
          end if
          ! copy value from received array into spectral field:
          sh_ri(shR%remap(i,k,1),shR%remap(i,k,2),shR%remap(i,k,3)) = sh_recv(i,k,1)
       end do
    end do

    status = 0

  END SUBROUTINE SHREMAP_REMAP
  !EOC

  !--------------------------------------------------------------------------
  !                    TM5                                                  !
  !--------------------------------------------------------------------------
  !BOP
  !
  ! !IROUTINE:   SetPrismTime_date
  !
  ! !DESCRIPTION: returns current time/date into prism format (seconds from
  !               prism reference start).
  !\\
  !\\
  ! !INTERFACE:
  !
  subroutine SetPrismTime_date( prism_t, t, status )
    !
    ! !USES:
    !
    use GO, only : TDate, NewDate, iTotal, operator(-)
    !
    ! !OUTPUT PARAMETERS:
    !
    integer,     intent(out) :: prism_t   ! seconds from start
    !
    ! !INPUT PARAMETERS:
    !
    type(TDate),  intent(in) :: t
    integer,     intent(out) :: status
    !
    ! !REMARKS:
    !
    !EOP
    !------------------------------------------------------------------------
    !BOC

    character(len=*), parameter ::  rname = mname//'/SetPrismTime_date'

    ! --- begin ----------------------------------------

    ! seconds since start
    prism_t = iTotal( t - NewDate(time6=PRISM_start_date), 'sec' )

    status = 0

  end subroutine SetPrismTime_date
  !EOC

END MODULE TM5_PRISM