rrtmgp_lw_gas_optics Module Reference

This module contains two routines: One to initialize the k-distribution data and functions needed to compute the longwave gaseous optical properties in RRTMGP. The second routine is a ccpp scheme within the "radiation loop", where the longwave optical prperties (optical-depth) are computed for clear-sky conditions (no aerosols).

Functions/Subroutines
subroutine	rrtmgp_lw_gas_optics_init (rrtmgp_root_dir, rrtmgp_lw_file_gas, active_gases_array, mpicomm, mpirank, mpiroot, errmsg, errflg)

Variables
type(ty_gas_optics_rrtmgp)	lw_gas_props
integer	ntempslw
integer	npresslw
integer	ngptslw
integer	nabsorberslw
integer	nextrabsorberslw
integer	nminorabsorberslw
integer	nmixingfracslw
integer	nlayerslw
integer	nbndslw
integer	npairslw
integer	ninternalsourcetempslw
integer	nminor_absorber_intervals_lowerlw
integer	nminor_absorber_intervals_upperlw
integer	ncontributors_lowerlw
integer	ncontributors_upperlw
integer	nfit_coeffslw
integer, dimension(:), allocatable	kminor_start_lowerlw
	Starting index in the [1, nContributors] vector for a contributor.
integer, dimension(:), allocatable	kminor_start_upperlw
	Starting index in the [1, nContributors] vector for a contributor.
integer, dimension(:,:), allocatable	band2gptlw
	Beginning and ending gpoint for each band.
integer, dimension(:,:), allocatable	minor_limits_gpt_lowerlw
	Beginning and ending gpoint for each minor interval in lower atmosphere.
integer, dimension(:,:), allocatable	minor_limits_gpt_upperlw
	Beginning and ending gpoint for each minor interval in upper atmosphere.
integer, dimension(:,:,:), allocatable	key_specieslw
	Key species pair for each band.
real(kind_phys)	press_ref_troplw
	Reference pressure separating the lower and upper atmosphere [Pa].
real(kind_phys)	temp_ref_plw
	Standard spectroscopic reference pressure [Pa].
real(kind_phys)	temp_ref_tlw
	Standard spectroscopic reference temperature [K].
real(kind_phys), dimension(:), allocatable	press_reflw
	Pressures for reference atmosphere; press_ref(# reference layers) [Pa].
real(kind_phys), dimension(:), allocatable	temp_reflw
	Temperatures for reference atmosphere; temp_ref(# reference layers) [K].
real(kind_phys), dimension(:,:), allocatable	band_limslw
	Beginning and ending wavenumber [cm -1] for each band.
real(kind_phys), dimension(:,:), allocatable	totplnklw
	Integrated Planck function by band.
real(kind_phys), dimension(:,:), allocatable	optimal_angle_fitlw
real(kind_phys), dimension(:,:,:), allocatable	vmr_reflw
	volume mixing ratios for reference atmospherer
real(kind_phys), dimension(:,:,:), allocatable	kminor_lowerlw
	(transformed from [nTemp x nEta x nGpt x nAbsorbers] array to
real(kind_phys), dimension(:,:,:), allocatable	kminor_upperlw
	(transformed from [nTemp x nEta x nGpt x nAbsorbers] array to
real(kind_phys), dimension(:,:,:), allocatable	rayl_lowerlw
	Not used in LW, rather allocated(rayl_lower) is used.
real(kind_phys), dimension(:,:,:), allocatable	rayl_upperlw
	Not used in LW, rather allocated(rayl_upper) is used.
real(kind_phys), dimension(:,:,:,:), allocatable	kmajorlw
	Stored absorption coefficients due to major absorbing gases.
real(kind_phys), dimension(:,:,:,:), allocatable	planck_fraclw
	Planck fractions
character(len=32), dimension(:), allocatable	gas_nameslw
	Names of absorbing gases.
character(len=32), dimension(:), allocatable	gas_minorlw
	Name of absorbing minor gas.
character(len=32), dimension(:), allocatable	identifier_minorlw
	Unique string identifying minor gas.
character(len=32), dimension(:), allocatable	minor_gases_lowerlw
	Names of minor absorbing gases in lower atmosphere.
character(len=32), dimension(:), allocatable	minor_gases_upperlw
	Names of minor absorbing gases in upper atmosphere.
character(len=32), dimension(:), allocatable	scaling_gas_lowerlw
	Absorption also depends on the concentration of this gas.
character(len=32), dimension(:), allocatable	scaling_gas_upperlw
	Absorption also depends on the concentration of this gas.
logical(wl), dimension(:), allocatable	minor_scales_with_density_lowerlw
	Density scaling is applied to minor absorption coefficients.
logical(wl), dimension(:), allocatable	minor_scales_with_density_upperlw
	Density scaling is applied to minor absorption coefficients.
logical(wl), dimension(:), allocatable	scale_by_complement_lowerlw
	Absorption is scaled by concentration of scaling_gas (F) or its complement (T)
logical(wl), dimension(:), allocatable	scale_by_complement_upperlw
	Absorption is scaled by concentration of scaling_gas (F) or its complement (T)