module radcommon_h

      use radinc_h
      implicit none

!----------------------------------------------------------------------C
!
!                             radcommon.h
!
!----------------------------------------------------------------------C
!
!  "Include" grid.h and radinc.h before this file in code that uses
!  some or all of this common data set
!
!     WNOI       - Array of wavenumbers at the spectral interval
!                  centers for the infrared.  Array is NSPECTI
!                  elements long.
!     DWNI       - Array of "delta wavenumber", i.e., the width,
!                  in wavenumbers (cm^-1) of each IR spectral
!                  interval.  NSPECTI elements long.
!     WAVEI      - Array (NSPECTI elements long) of the wavelenght
!                  (in microns) at the center of each IR spectral
!                  interval.
!     WNOV       - Array of wavenumbers at the spectral interval
!                  center for the VISUAL.  Array is NSPECTV
!                  elements long.
!     DWNV       - Array of "delta wavenumber", i.e., the width,
!                  in wavenumbers (cm^-1) of each VISUAL spectral
!                  interval.  NSPECTV elements long.
!     WAVEV      - Array (NSPECTV elements long) of the wavelenght
!                  (in microns) at the center of each VISUAL spectral
!                  interval.
!     STELLARF   - Array (NSPECTV elements) of stellar flux (W/M^2) in
!                  each spectral interval.  Values are for 1 AU,
!                  scaled to the planetary distance elsewhere.
!     TAURAY     - Array (NSPECTV elements) of the pressure-independent
!                  part of Rayleigh scattering optical depth.
!     FZEROI     - Fraction of zeros in the IR CO2 k-coefficients, for
!                  each temperature, pressure, and spectral interval
!     FZEROV     - Fraction of zeros in the VISUAL CO2 k-coefficients, for
!                  each temperature, pressure, and spectral interval
!
!     AEROSOL RADIATIVE OPTICAL CONSTANTS
! 
!   Shortwave
!   ~~~~~~~~~
! 
! tauvis: dust optical depth at reference wavelength  ("longrefvis" set
! in dimradmars.h : typically longrefvis = 0.67E-6 m, as measured by Viking )
!
! For the "naerkind" kind of aerosol radiative properties : 
! QVISsQREF  :  Qext / Qext("longrefvis")
! omegavis   :  single scattering albedo
! gvis       :  assymetry factor
! 
!   Longwave
!   ~~~~~~~~
! 
! For the "naerkind" kind of aerosol radiative properties : 
! QIRsQREF :  Qext / Qext("longrefvis")
! omegaIR  :  mean single scattering albedo
! gIR      :  mean assymetry factor


      character(len=3) :: gastype(3)

      REAL*8 BWNI(L_NSPECTI+1), WNOI(L_NSPECTI), DWNI(L_NSPECTI), WAVEI(L_NSPECTI)
      REAL*8 BWNV(L_NSPECTV+1), WNOV(L_NSPECTV), DWNV(L_NSPECTV), WAVEV(L_NSPECTV)
      REAL*8 STELLARF(L_NSPECTV), TAURAY(L_NSPECTV)

      REAL*8 blami(L_NSPECTI+1)
      REAL*8 blamv(L_NSPECTV+1) ! these are needed by suaer.F90

      real*8 gasi(L_NTREF,L_PINT,L_REFVAR,L_NSPECTI,L_NGAUSS)
      real*8 gasv(L_NTREF,L_PINT,L_REFVAR,L_NSPECTV,L_NGAUSS)
      real*8 FZEROI(L_NSPECTI)
      real*8 FZEROV(L_NSPECTV)
      real*8 PGASREF(L_NPREF), TGASREF(L_NTREF)
      real*8 pgasmin, pgasmax
      real*8 tgasmin, tgasmax

      real tauvis
      real QVISsQREF(L_NSPECTV,naerkind,nsizemax)
      real omegavis(L_NSPECTV,naerkind,nsizemax)
      real gvis(L_NSPECTV,naerkind,nsizemax)
      real QIRsQREF(L_NSPECTI,naerkind,nsizemax)
      real omegair(L_NSPECTI,naerkind,nsizemax)
      real gir(L_NSPECTI,naerkind,nsizemax)

      real*8 WREFVAR(L_REFVAR)

! Reference wavelengths used to compute reference optical depth (m)
! ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

      REAL lamrefir(naerkind),lamrefvis(naerkind)

! Actual number of grain size classes in each domain for a
!   given aerosol:

      INTEGER          :: nsize(naerkind,2)

! Particle size axis (depend on the kind of aerosol and the
!   radiation domain)

      DOUBLE PRECISION :: radiustab(naerkind,2,nsizemax)

! Extinction coefficient at reference wavelengths;
!   These wavelengths are defined in aeroptproperties, and called
!   longrefvis and longrefir.

      REAL :: QREFvis(naerkind,nsizemax)
      REAL :: QREFir(naerkind,nsizemax)
      REAL :: omegaREFvis(naerkind,nsizemax)
      REAL :: omegaREFir(naerkind,nsizemax)

      REAL tstellar ! Stellar brightness temperature (SW)

      real*8 planckir(L_NSPECTI,NTstop-NTstar+1)

      real*8 PTOP, TAUREF(L_LEVELS+1)
      real*8 pfgasref(L_PINT) ! finer reference grid for some reason

      real*8, parameter :: UBARI = 0.5D0

      real*8 gweight(L_NGAUSS)

!     If the gas optical depth (top to the surface) is less than
!     this value, we place that Gauss-point into the "zeros"
!     channel.
      real*8, parameter :: TLIMIT =  1.0D-30

!     Factor to convert pressures from millibars to Pascals
      real*8, parameter :: SCALEP = 1.00D+2

      real*8, parameter :: sigma = 5.67032e-8

      real*8 Cmk
      save Cmk


      end module radcommon_h