SoilAlbedo

INTERFACE:

   subroutine SoilAlbedo (lbc, ubc, coszen, albsnd, albsni)

DESCRIPTION:

   Determine ground surface albedo, accounting for snow

USES:

     use shr_kind_mod, only: r8 => shr_kind_r8
     use clmtype
     use clm_varpar, only : numrad
     use clm_varcon, only : albsat, albdry, alblak, albice, tfrz, istice, ists

ARGUMENTS:

     implicit none
     integer , intent(in) :: lbc, ubc                ! column bounds
     real(r8), intent(in) :: coszen(lbc:ubc)         ! cos solar zenith angle 
     real(r8), intent(in) :: albsnd(lbc:ubc,numrad)  ! snow albedo (direct)
     real(r8), intent(in) :: albsni(lbc:ubc,numrad)  ! snow albedo (diffuse)

CALLED FROM:

   subroutine SurfaceAlbedo in this module

REVISION HISTORY:

   Author: Gordon Bonan
   2/5/02, Peter Thornton: Migrated to new data structures.
   8/20/03, Mariana Vertenstein: Vectorized routine

LOCAL VARIABLES:

   local pointers to original implicit in arguments
     integer , pointer :: clandunit(:)    ! landunit of corresponding column
     integer , pointer :: ltype(:)        ! landunit type
     integer , pointer :: isoicol(:)      ! soil color class
     real(r8), pointer :: t_grnd(:)       ! ground temperature (Kelvin)
     real(r8), pointer :: frac_sno(:)     ! fraction of ground covered by snow
     real(r8), pointer :: h2osoi_vol(:,:) ! volumetric soil water [m3/m3]
   local pointers to original implicit out arguments
     real(r8), pointer:: albgrd(:,:)      ! ground albedo (direct)
     real(r8), pointer:: albgri(:,:)      ! ground albedo (diffuse)