rrtmgp_lw_cloud_optics Module Reference

This module contains two routines: The first initializes data and functions needed to compute the longwave cloud radiative properteis in RRTMGP. The second routine is a ccpp scheme within the "radiation loop", where the shortwave optical prperties (optical-depth, single-scattering albedo, asymmetry parameter) are computed for ALL cloud types visible to RRTMGP.

Functions/Subroutines
subroutine	rrtmgp_lw_cloud_optics_init (rrtmgp_root_dir, rrtmgp_lw_file_clouds, dogp_cldoptics_pade, dogp_cldoptics_lut, nrghice, mpicomm, mpirank, mpiroot, errmsg, errflg)

Variables
type(ty_cloud_optics)	lw_cloud_props
integer	nrghice_fromfilelw
integer	nbandlw
integer	nsize_liqlw
integer	nsize_icelw
integer	nsizereglw
integer	ncoeff_extlw
integer	ncoeff_ssa_glw
integer	nboundlw
integer	npairslw
real(kind_phys)	radliq_faclw
	Factor for calculating LUT interpolation indices for liquid.
real(kind_phys)	radice_faclw
	Factor for calculating LUT interpolation indices for ice
real(kind_phys), dimension(:,:), allocatable	lut_extliqlw
	LUT shortwave liquid extinction coefficient.
real(kind_phys), dimension(:,:), allocatable	lut_ssaliqlw
	LUT shortwave liquid single scattering albedo.
real(kind_phys), dimension(:,:), allocatable	lut_asyliqlw
	LUT shortwave liquid asymmetry parameter.
real(kind_phys), dimension(:,:), allocatable	band_limscldlw
	Beginning and ending wavenumber [cm -1] for each band
real(kind_phys), dimension(:,:,:), allocatable	lut_exticelw
	LUT shortwave ice extinction coefficient.
real(kind_phys), dimension(:,:,:), allocatable	lut_ssaicelw
	LUT shortwave ice single scattering albedo.
real(kind_phys), dimension(:,:,:), allocatable	lut_asyicelw
	LUT shortwave ice asymmetry parameter.
real(kind_phys), dimension(:), allocatable	pade_sizereg_extliqlw
	Particle size regime boundaries for shortwave liquid extinction.
real(kind_phys), dimension(:), allocatable	pade_sizereg_ssaliqlw
	Particle size regime boundaries for shortwave liquid single.
real(kind_phys), dimension(:), allocatable	pade_sizereg_asyliqlw
	Particle size regime boundaries for shortwave liquid asymmetry.
real(kind_phys), dimension(:), allocatable	pade_sizereg_exticelw
	Particle size regime boundaries for shortwave ice extinction.
real(kind_phys), dimension(:), allocatable	pade_sizereg_ssaicelw
	Particle size regime boundaries for shortwave ice single.
real(kind_phys), dimension(:), allocatable	pade_sizereg_asyicelw
	Particle size regime boundaries for shortwave ice asymmetry.
real(kind_phys), dimension(:,:,:), allocatable	pade_extliqlw
	PADE coefficients for shortwave liquid extinction.
real(kind_phys), dimension(:,:,:), allocatable	pade_ssaliqlw
	PADE coefficients for shortwave liquid single scattering albedo.
real(kind_phys), dimension(:,:,:), allocatable	pade_asyliqlw
	PADE coefficients for shortwave liquid asymmetry parameter.
real(kind_phys), dimension(:,:,:,:), allocatable	pade_exticelw
	PADE coefficients for shortwave ice extinction.
real(kind_phys), dimension(:,:,:,:), allocatable	pade_ssaicelw
	PADE coefficients for shortwave ice single scattering albedo.
real(kind_phys), dimension(:,:,:,:), allocatable	pade_asyicelw
	PADE coefficients for shortwave ice asymmetry parameter.
real(kind_phys), parameter	absrain = 0.33e-3
	Rain drop absorption coefficient m2/g .
real(kind_phys), parameter	abssnow0 = 1.5
	Snow flake absorption coefficient (micron), fu coeff.
real(kind_phys), parameter	abssnow1 = 2.34e-3
	Snow flake absorption coefficient m2/g, ncar coef.
real(kind_phys)	radliq_lwrlw
	Liquid particle size lower bound for LUT interpolation.
real(kind_phys)	radliq_uprlw
	Liquid particle size upper bound for LUT interpolation.
real(kind_phys)	radice_lwrlw
	Ice particle size upper bound for LUT interpolation.
real(kind_phys)	radice_uprlw
	Ice particle size lower bound for LUT interpolation.