This module contains climatological atmospheric aerosol schemes for radiation computations. More...

Detailed Description

This module contains climatological atmospheric aerosol schemes for radiation computations.

Version: NCEP-Radiation_aerosols v5.2 Jan 2013

This module has three externally callable subroutines:

aer_init() – initialization; called at the start of run to set up module parameters
aer_update() – updating aerosol data; called within the time loop to check and update data sets
setaer() – mapping aeros profile, compute aeros opticals

References:

OPAC climatological aerosols: Hou et al. 2002 [27]; Hess et al. 1998 [24]
GOCART interactive aerosols: Chin et al., 2000 [7]
Stratospheric volcanical aerosols: Sato et al. 1993 [48]

Collaboration diagram for module_radiation_aerosols:

Data Types
type	module_radiation_aerosols::gocart_index_type
	index for gocart aerosol species to be included in the calculations of aerosol optical properties (ext, ssa, asy) More...

type	module_radiation_aerosols::tracer_index_type
	index for gocart aerosols from prognostic tracer fields More...

Variables
integer, parameter, public	module_radiation_aerosols::nf_aelw = 3
	num of output fields for LW rad

integer, parameter, public	module_radiation_aerosols::nlwstr = 1
	starting band number in ir region

integer, parameter, public	module_radiation_aerosols::nspc = 5
	num of species for output aod (opnl)

integer, parameter, public	module_radiation_aerosols::nspc1 = NSPC + 1
	total+species

real(kind=kind_phys), parameter	module_radiation_aerosols::f_zero = 0.0

real(kind=kind_phys), parameter	module_radiation_aerosols::f_one = 1.0

integer, save	module_radiation_aerosols::nswbnd = NBDSW
	number of actual bands for sw aerosols; calculated according to laswflg setting

integer, save	module_radiation_aerosols::nlwbnd = NBDLW
	number of actual bands for lw aerosols; calculated according to lalwflg and lalw1bd settings

integer, save	module_radiation_aerosols::nswlwbd = NBDSW+NBDLW
	total number of bands for sw+lw aerosols

integer, parameter, public	module_radiation_aerosols::nwvsol = 151
	num of wvnum regions where solar flux is constant

integer, parameter, public	module_radiation_aerosols::nwvtot = 57600
	total num of wvnum included

integer, parameter, public	module_radiation_aerosols::nwvtir = 4000
	total num of wvnum in ir range

integer, dimension(nwvsol), save	module_radiation_aerosols::nwvns0
	number of wavenumbers in each region where the solar flux is constant

real(kind=kind_phys), dimension(nwvsol), save	module_radiation_aerosols::s0intv
	solar flux \(w/m^2\) in each wvnumb region where it is constant

integer, parameter	module_radiation_aerosols::minvyr = 1850
	lower limit (year) data available

integer, parameter	module_radiation_aerosols::maxvyr = 1999
	upper limit (year) data available

integer, dimension(:,:,:), allocatable, save	module_radiation_aerosols::ivolae
	monthly, 45-deg lat-zone aerosols data set in subroutine 'aer_init'

integer	module_radiation_aerosols::kyrstr
	starting year of data in the input file

integer	module_radiation_aerosols::kyrend
	ending year of data in the input file

integer	module_radiation_aerosols::kyrsav
	the year of data in use in the input file

integer	module_radiation_aerosols::kmonsav
	the month of data in use in the input file

integer, parameter	module_radiation_aerosols::nxc = 5
	num of max componets in a profile

integer, parameter	module_radiation_aerosols::nae = 7
	num of aerosols profile structures

integer, parameter	module_radiation_aerosols::ndm = 5
	num of atmos aerosols domains

integer, parameter	module_radiation_aerosols::imxae = 72
	num of lon-points in glb aeros data set

integer, parameter	module_radiation_aerosols::jmxae = 37
	num of lat-points in glb aeros data set

integer, parameter	module_radiation_aerosols::naerbnd =61
	num of bands for clim aer data (opac)

integer, parameter	module_radiation_aerosols::nrhlev =8
	num of rh levels for rh-dep components

integer, parameter	module_radiation_aerosols::ncm1 = 6
	num of rh independent aeros species

integer, parameter	module_radiation_aerosols::ncm2 = 4
	num of rh dependent aeros species

integer, parameter	module_radiation_aerosols::ncm = NCM1+NCM2

real(kind=kind_phys), dimension(nrhlev), save	module_radiation_aerosols::rhlev
	predefined relative humidity levels

real(kind=kind_phys), dimension(ndm, nae), save	module_radiation_aerosols::haer
	scale height of aerosols (km)

real(kind=kind_phys), dimension(ndm, nae), save	module_radiation_aerosols::prsref
	ref pressure lev (sfc to toa) in mb (100Pa)

real(kind=kind_phys), dimension(ndm, nae), save	module_radiation_aerosols::sigref
	ref sigma lev (sfc to toa)

topospheric aerosol profile distribution
real(kind=kind_phys), dimension(nxc, imxae, jmxae), save	module_radiation_aerosols::cmixg
	aeros component mixing ratio

real(kind=kind_phys), dimension(2,imxae, jmxae), save	module_radiation_aerosols::denng
	aeros number density

integer, dimension(nxc, imxae, jmxae), save	module_radiation_aerosols::idxcg
	aeros component index

integer, dimension( imxae, jmxae), save	module_radiation_aerosols::kprfg
	aeros profile index

module variables for gocart aerosol optical properties
integer, parameter	module_radiation_aerosols::kaerbnd =61
	num of bands for aer data (gocart)

integer, parameter	module_radiation_aerosols::krhlev =36
	num of rh levels for rh-dep components

integer, save	module_radiation_aerosols::kcm1 = 0
	num of rh indep aerosols (set in subr set_aerspc)

integer, save	module_radiation_aerosols::kcm2 = 0
	num of rh dep aerosols (set in subr set_aerspc)

integer, save	module_radiation_aerosols::kcm
	=KCM1+KCM2 (set in subr set_aerspc)

real(kind=kind_phys), dimension(krhlev)	module_radiation_aerosols::rhlev_grt

integer, dimension(:), allocatable	module_radiation_aerosols::iendwv_grt
	spectral band structure: ending wavenumber ( \(cm^-1\)) for each band

relative humidity independent aerosol optical properties:
species : dust (8 bins)
real(kind=kind_phys), dimension(:,:), allocatable	module_radiation_aerosols::rhidext0_grt
	extinction coefficient

real(kind=kind_phys), dimension(:,:), allocatable	module_radiation_aerosols::rhidssa0_grt
	single scattering albedo

real(kind=kind_phys), dimension(:,:), allocatable	module_radiation_aerosols::rhidasy0_grt
	asymmetry parameter

relative humidity dependent aerosol optical properties:
species : soot, suso, waso, ssam, sscm
real(kind=kind_phys), dimension(:,:,:), allocatable	module_radiation_aerosols::rhdpext0_grt
	extinction coefficient

real(kind=kind_phys), dimension(:,:,:), allocatable	module_radiation_aerosols::rhdpssa0_grt
	single scattering albedo

real(kind=kind_phys), dimension(:,:,:), allocatable	module_radiation_aerosols::rhdpasy0_grt
	asymmetry parameter

module variables for gocart aerosol clim data set
extinction coefficient for SW+LW spectral band single scattering albedo for SW+LW band asymmetry parameter for SW+LW band
integer, parameter	module_radiation_aerosols::imxg = 144
	num of lon-points in geos dataset

integer, parameter	module_radiation_aerosols::jmxg = 91
	num of lat-points in geos dataset

integer, parameter	module_radiation_aerosols::kmxg = 30
	num of vertical layers in geos dataset

integer, save	module_radiation_aerosols::nmxg
	to be determined by set_aerspc

real(kind=kind_phys), parameter	module_radiation_aerosols::dltx = 360.0 / float(IMXG)

real(kind=kind_phys), parameter	module_radiation_aerosols::dlty = 180.0 / float(JMXG-1)

real(kind=kind_phys), dimension(:,:,:), allocatable, save	module_radiation_aerosols::psclmg
	pressure in cb

real(kind=kind_phys), dimension(:,:,:,:), allocatable, save	module_radiation_aerosols::dmclmg
	aerosol dry mass in g/m3 or aerosol mixing ration in mol/mol or Kg/Kg

real(kind=kind_phys), dimension(:), allocatable, save	module_radiation_aerosols::geos_rlon
	geos-gocart longitude arrays

real(kind=kind_phys), dimension(:), allocatable, save	module_radiation_aerosols::geos_rlat
	geos-gocart latitude arrays

character *4, save	module_radiation_aerosols::gocart_climo = 'xxxx'
	control flag for gocart climo data set: xxxx as default; ver3 for geos3; ver4 for geos4; 0000 for unknown data

real(kind=kind_io4), dimension(:), allocatable	module_radiation_aerosols::molwgt
	molecular wght of gocart aerosol species

logical, save	module_radiation_aerosols::lgrtint = .true.
	logical parameter for gocart initialization control

logical, save	module_radiation_aerosols::lckprnt = .false.
	logical parameter for gocart debug print control

real(kind=kind_phys), save	module_radiation_aerosols::ctaer = f_zero
	merging coefficients for fcst/clim; determined from fdaer

logical, save	module_radiation_aerosols::get_fcst = .true.
	option to get fcst gocart aerosol field

logical, save	module_radiation_aerosols::get_clim = .true.
	option to get clim gocart aerosol field

integer, save	module_radiation_aerosols::isoot
	index for rh dependent aerosol optical properties (2nd dimension for extrhd_grt, ssarhd_grt, and asyrhd_grt)

integer, save	module_radiation_aerosols::iwaso

integer, save	module_radiation_aerosols::isuso

integer, save	module_radiation_aerosols::issam

integer, save	module_radiation_aerosols::isscm

integer	module_radiation_aerosols::gocart_index_type::dust1

integer	module_radiation_aerosols::gocart_index_type::dust2

integer	module_radiation_aerosols::gocart_index_type::dust3

integer	module_radiation_aerosols::gocart_index_type::dust4

integer	module_radiation_aerosols::gocart_index_type::dust5

integer	module_radiation_aerosols::gocart_index_type::ssam

integer	module_radiation_aerosols::gocart_index_type::sscm

integer	module_radiation_aerosols::gocart_index_type::suso

integer	module_radiation_aerosols::gocart_index_type::waso_phobic

integer	module_radiation_aerosols::gocart_index_type::waso_philic

integer	module_radiation_aerosols::gocart_index_type::soot_phobic

integer	module_radiation_aerosols::gocart_index_type::soot_philic

type(gocart_index_type), save	module_radiation_aerosols::dm_indx

integer	module_radiation_aerosols::tracer_index_type::du001

integer	module_radiation_aerosols::tracer_index_type::du002

integer	module_radiation_aerosols::tracer_index_type::du003

integer	module_radiation_aerosols::tracer_index_type::du004

integer	module_radiation_aerosols::tracer_index_type::du005

integer	module_radiation_aerosols::tracer_index_type::ss001

integer	module_radiation_aerosols::tracer_index_type::ss002

integer	module_radiation_aerosols::tracer_index_type::ss003

integer	module_radiation_aerosols::tracer_index_type::ss004

integer	module_radiation_aerosols::tracer_index_type::ss005

integer	module_radiation_aerosols::tracer_index_type::so4

integer	module_radiation_aerosols::tracer_index_type::ocphobic

integer	module_radiation_aerosols::tracer_index_type::ocphilic

integer	module_radiation_aerosols::tracer_index_type::bcphobic

integer	module_radiation_aerosols::tracer_index_type::bcphilic

type(tracer_index_type), save	module_radiation_aerosols::dmfcs_indx

integer, save	module_radiation_aerosols::num_gridcomp = 0
	number of aerosol grid components

character, dimension(:), allocatable, save	module_radiation_aerosols::gridcomp
	aerosol grid components

integer, parameter	module_radiation_aerosols::max_num_gridcomp = 5
	default full-package setting

character *2, dimension(max_num_gridcomp)	module_radiation_aerosols::max_gridcomp
	data max_gridcomp /'DU', 'BC', 'OC', 'SU', 'SS'/

integer, dimension(ncm)	module_radiation_aerosols::idxspc
	index conversion array:data idxspc / 1, 2, 1, 1, 1, 1, 3, 5, 5, 4 /

real(kind=kind_phys), parameter	module_radiation_aerosols::wvn550 = 1.0e4/0.55
	the wavenumber ( \(cm^-1\)) of wavelength 550nm for diagnostic aod output

integer, save	module_radiation_aerosols::nv_aod = 1
	the sw spectral band covering wvn550 (comp in aer_init)

subroutine, public	module_radiation_aerosols::aer_init
	The initialization program is to set up necessary parameters and working arrays. More...

subroutine	wrt_aerlog
	This subroutine writes aerosol parameter configuration to run log file.

subroutine	set_spectrum
	This subroutine defines the one wavenumber solar fluxes based on toa solar spectral distribution, and define the one wavenumber IR fluxes based on black-body emission distribution at a predefined temperature. More...

subroutine	set_volcaer
	The initialization program for stratospheric volcanic aerosols.

subroutine	module_radiation_aerosols::clim_aerinit
	This subroutine is the opac-climatology aerosol initialization program to set up necessary parameters and working arrays. More...

subroutine	set_aercoef
	The initialization program for climatological aerosols. The program reads and maps the pre-tabulated aerosol optical spectral data onto corresponding SW radiation spectral bands. More...

subroutine	optavg
	This subroutine computes mean aerosols optical properties over each SW radiation spectral band for each of the species components. This program follows GFDL's approach for thick cloud optical property in SW radiation scheme (2000).

subroutine, public	module_radiation_aerosols::aer_update
	This subroutine checks and updates time varying climatology aerosol data sets. More...

subroutine	trop_update
	This subroutine updates the monthly global distribution of aerosol profiles in five degree horizontal resolution.

subroutine	volc_update
	This subroutine searches historical volcanic data sets to find and read in monthly 45-degree lat-zone band of optical depth.

subroutine, public	module_radiation_aerosols::setaer
	This subroutine computes aerosols optical properties. More...

subroutine	module_radiation_aerosols::aer_property
	This subroutine maps the 5 degree global climatological aerosol data set onto model grids, and compute aerosol optical properties for SW and LW radiations. More...

subroutine	radclimaer
	This subroutine computes aerosols optical properties in NSWLWBD bands. there are seven different vertical profile structures. in the troposphere, aerosol distribution at each grid point is composed from up to six components out of ten different substances.

subroutine	module_radiation_aerosols::gocart_init
	The initialization program for gocart aerosols. More...

subroutine	set_aerspc (raddt, fdaer)
	This subroutine determines merging coefficients ctaer; setup aerosol specification.

subroutine	rd_gocart_luts
	This subroutine reads input gocart aerosol optical data from Mie code calculations.

subroutine	optavg_grt
	This subroutine computes mean aerosols optical properties over each SW/LW radiation spectral band for each of the species components. This program follows GFDL's approach for thick cloud optical property in SW radiation scheme (2000).

subroutine	rd_gocart_clim
	This subroutine: More...

subroutine	module_radiation_aerosols::setgocartaer
	This subroutine computes SW + LW aerosol optical properties for gocart aerosol species (merged from fcst and clim fields). More...

subroutine	map_aermr
	This subroutine maps input tracer fields (trcly) to local tracer array (aermr).

subroutine	aeropt_grt
	This subroutine computes aerosols optical properties in NSWLWBD SW/LW bands. Aerosol distribution at each grid point is composed from up to NMXG aerosol species (from NUM_GRIDCOMP components).

Function/Subroutine Documentation

subroutine, public module_radiation_aerosols::aer_init ( )

The initialization program is to set up necessary parameters and working arrays.

Parameters

NLAY	number of model vertical layers (not used)
me	print message control flag

General Algorithm

Call wrt_aerlog() to write aerosol parameter configuration to output logs.
Call set_spectrum() to set up spectral one wavenumber solar/IR fluxes.
Call clim_aerinit() to invoke tropospheric aerosol initialization.
Call set_volcaer() to invoke stratospheric volcanic aerosol initialization.

Definition at line 686 of file radiation_aerosols.f.

References clim_aerinit(), physparam::iaerflg, physparam::iaermdl, kmonsav, kyrend, kyrsav, kyrstr, physparam::lalw1bd, physparam::lalwflg, physparam::laswflg, physparam::lavoflg, nlwbnd, nswbnd, nswlwbd, set_spectrum(), set_volcaer(), and wrt_aerlog().

Referenced by module_radiation_driver::radinit().

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subroutine module_radiation_aerosols::aer_property ( )

private

This subroutine maps the 5 degree global climatological aerosol data set onto model grids, and compute aerosol optical properties for SW and LW radiations.

Parameters

prsi	(IMAX,NLP1), pressure at interface in mb
prsl	(IMAX,NLAY), layer mean pressure(not used)
prslk	(IMAX,NLAY), exner function= \((p/p0)^{rocp}\) (not used)
tvly	(IMAX,NLAY), layer virtual temperature (not used)
rhlay	(IMAX,NLAY), layer mean relative humidity
dz	(IMAX,NLAY), layer thickness in m
hz	(IMAX,NLP1), level high in m
tracer	(IMAX,NLAY,NTRAC), aer tracer concentrations (not used)
alon,alat	(IMAX), longitude and latitude of given points in degree
slmsk	(IMAX), sea/land mask (sea:0,land:1,sea-ice:2)
laersw,laerlw	logical flag for sw/lw aerosol calculations
IMAX	horizontal dimension of arrays
NLAY,NLP1	vertical dimensions of arrays
NSPC	num of species for optional aod output fields
aerosw	(IMAX,NLAY,NBDSW,NF_AESW), aeros opt properties for sw (:,:,:,1): optical depth (:,:,:,2): single scattering albedo (:,:,:,3): asymmetry parameter
aerolw	(IMAX,NLAY,NBDLW,NF_AELW), aeros opt properties for lw (:,:,:,1): optical depth (:,:,:,2): single scattering albedo (:,:,:,3): asymmetry parameter
aerodp	(IMAX,NSPC+1), vertically integrated aer-opt-depth

General Algorithm

Map aerosol data to model grids
- Map grid in longitude direction, lon from 0 to 355 deg resolution
- Map grid in latitude direction, lat from 90n to 90s in 5 deg resolution
Determin the type of aerosol profile (kp) and scale hight for domain 1 (h1) to be used at this grid point.
Compute horizontal bi-linear interpolation weights
Do horizontal bi-linear interpolation on aerosol partical density (denn)
Do horizontal bi-linear interpolation on mixing ratios
Prepare to setup domain index array and effective layer thickness, also convert pressure level to sigma level to follow the terrain.
Call radclimaer() to calculate SW/LW aerosol optical properties for the corresponding frequency bands.

Definition at line 2769 of file radiation_aerosols.f.

References cmixg, denng, haer, idxcg, imxae, physparam::ivflip, jmxae, kprfg, nlwbnd, nspc, nswbnd, nv_aod, nxc, prsref, radclimaer(), and sigref.

Referenced by setaer().

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subroutine, public module_radiation_aerosols::aer_update ( )

This subroutine checks and updates time varying climatology aerosol data sets.

Parameters

iyear	4-digit calender year
imon	month of the year
me	print message control flag

General Algorithm

Call trop_update() to update monthly tropospheric aerosol data.
Call volc_update() to update yearly stratospheric volcanic aerosol data.

Definition at line 1805 of file radiation_aerosols.f.

References physparam::lalwflg, physparam::laswflg, physparam::lavoflg, trop_update(), and volc_update().

Referenced by module_radiation_driver::radupdate().

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subroutine module_radiation_aerosols::clim_aerinit ( )

private

This subroutine is the opac-climatology aerosol initialization program to set up necessary parameters and working arrays.

Parameters

solfwv	(NWVTOT), solar flux for each individual wavenumber \((w/m^2)\)
eirfwv	(NWVTIR), IR flux(273k) for each individual wavenumber \((w/m^2)\)
me	print message control flag

General Algorithm

call set_aercoef() to invoke tropospheric aerosol initialization.

Definition at line 1081 of file radiation_aerosols.f.

References set_aercoef().

Referenced by aer_init().

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subroutine module_radiation_aerosols::gocart_init ( )

private

The initialization program for gocart aerosols.

determine weight and index for aerosol composition/luts
read in monthly global distribution of gocart aerosols
read and map the tabulated aerosol optical spectral data onto corresponding SW/LW radiation spectral bands.

Parameters

NWVTOT	total num of wave numbers used in sw spectrum
solfwv	(NWVTOT), solar flux for each individual wavenumber (w/m2)
soltot	total solar flux for the spectrual range (w/m2)
NWVTIR	total num of wave numbers used in the ir region
eirfwv	(NWVTIR), ir flux(273k) for each individual wavenumber (w/m2)
NBDSW	num of bands calculated for sw aeros opt prop
NLWBND	num of bands calculated for lw aeros opt prop
NSWLWBD	total num of bands calc for sw+lw aeros opt prop
imon	month of the year
me	print message control flag
raddt
fdaer

General Algorithm

Definition at line 3530 of file radiation_aerosols.f.

References get_clim, iendwv_grt, kaerbnd, krhlev, lckprnt, lgrtint, nlwbnd, nswlwbd, nv_aod, nwvtir, nwvtot, optavg_grt(), rd_gocart_clim(), rd_gocart_luts(), rhdpasy0_grt, rhdpext0_grt, rhdpssa0_grt, rhidasy0_grt, rhidext0_grt, rhidssa0_grt, and set_aerspc().

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subroutine gocart_init::rd_gocart_clim ( )

private

This subroutine:

1. read in aerosol dry mass and surface pressure from GEOS3-GOCART C3.1 2000 monthly dataset or aerosol mixing ratio and surface pressure from GEOS4-GOCART 2000-2007 averaged monthly data set.
2. compute goes lat/lon array (for horizontal mapping)

Definition at line 4543 of file radiation_aerosols.f.

References dmclmg, geos_rlat, geos_rlon, gocart_climo, gridcomp, imxg, jmxg, kmxg, molwgt, nmxg, num_gridcomp, and psclmg.

Referenced by gocart_init().

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subroutine clim_aerinit::set_aercoef ( )

private

The initialization program for climatological aerosols. The program reads and maps the pre-tabulated aerosol optical spectral data onto corresponding SW radiation spectral bands.

General Algorithm

Reading climatological aerosols optical data from aeros_file, including:
- ending wave num for 61 aerosol spectral bands
- atmos scale height for 5 domains, 7 profs
- reference pressure for 5 domains, 7 profs
- rh independent ext coef for 61 bands, 6 species
- rh independent sca coef for 61 bands, 6 species
- rh independent ssa coef for 61 bands, 6 species
- rh independent asy coef for 61 bands, 6 species
- rh dependent ext coef for 61 bands, 8 rh lev, 4 species
- rh dependent sca coef for 61 bands, 8 rh lev, 4 species
- rh dependent ssa coef for 61 bands, 8 rh lev, 4 species
- rh dependent asy coef for 61 bands, 8 rh lev, 4 species
- stratospheric background aeros for 61 bands
Convert pressure reference level (in mb) to sigma reference level assume an 1000mb reference surface pressure.
Compute solar flux weights and interval indices for mapping spectral bands between SW radiation and aerosol data.
Compute LW flux weights and interval indices for mapping spectral bands between lw radiation and aerosol data.
Call optavg() to compute spectral band mean properties for each species.

Definition at line 1172 of file radiation_aerosols.f.

References physparam::aeros_file, haer, imxae, jmxae, physparam::lalwflg, physparam::laswflg, naerbnd, ncm1, ncm2, nlwbnd, nlwstr, nrhlev, nswbnd, nswlwbd, nv_aod, optavg(), prsref, sigref, and wvn550.

Referenced by clim_aerinit().

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subroutine aer_init::set_spectrum ( )

private

This subroutine defines the one wavenumber solar fluxes based on toa solar spectral distribution, and define the one wavenumber IR fluxes based on black-body emission distribution at a predefined temperature.

inputs: (module constants)
- NWVTOT: total num of wave numbers used in sw spectrum
- NWVTIR: total num of wave numbers used in the ir region
outputs: (in-scope variables)
- solfwv(NWVTOT): solar flux for each individual wavenumber ( \(W/m^2\))
- eirfwv(NWVTIR): ir flux(273k) for each individual wavenumber ( \(W/m^2\))

Definition at line 933 of file radiation_aerosols.f.

References physcons::con_boltz, physcons::con_c, physcons::con_pi, physcons::con_plnk, physcons::con_t0c, nwvns0, nwvsol, nwvtir, and s0intv.

Referenced by aer_init().

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subroutine, public module_radiation_aerosols::setaer ( )

This subroutine computes aerosols optical properties.

Parameters

prsi	(IMAX,NLP1), pressure at interface in mb
prsl	(IMAX,NLAY), layer mean pressure in mb
prslk	(IMAX,NLAY), exner function = \((p/p0)^{rocp}\)
tvly	(IMAX,NLAY), layer virtual temperature in K
rhlay	(IMAX,NLAY), layer mean relative humidity
slmsk	(IMAX), sea/land mask (sea:0,land:1,sea-ice:2)
tracer	(IMAX,NLAY,NTRAC), aerosol tracer concentration
xlon	(IMAX), longitude of given points in radiance, ok for both 0->2pi or -pi->+pi ranges
xlat	(IMAX), latitude of given points in radiance, default to pi/2 -> -pi/2, otherwise see in-line comment
IMAX	1, horizontal dimension of arrays
NLAY,NLP1	1, vertical dimensions of arrays
lsswr,lslwr	logical flags for sw/lw radiation calls
aerosw	(IMAX,NLAY,NBDSW,NF_AESW), aeros opt properties for sw (:,:,:,1): optical depth (:,:,:,2): single scattering albedo (:,:,:,3): asymmetry parameter
aerolw	(IMAX,NLAY,NBDLW,NF_AELW), aeros opt properties for lw (:,:,:,1): optical depth (:,:,:,2): single scattering albedo (:,:,:,3): asymmetry parameter
aerodp	(IMAX,NSPC1), vertically integrated optical depth

General Algorithm

Convert lat/lon from radiance to degree.
Compute level height and layer thickness.
Calculate SW aerosol optical properties for the corresponding frequency bands:
- if opac aerosol climatology is used, call aer_property(): this subroutine maps the 5 degree global climatological aerosol data set onto model grids, and compute aerosol optical properties for SW and LW radiations.
- if gocart aerosol scheme is used, call setgocartaer(): this subroutine computes sw + lw aerosol optical properties for gocart aerosol species (merged from fcst and clim fields).
Compute stratosphere volcanic forcing:
- select data in 4 lat bands, interpolation at the boundaries
- Find lower boundary of stratosphere: polar, fixed at 25000pa (250mb); tropic, fixed at 15000pa (150mb); mid-lat, interpolation
- SW: add volcanic aerosol optical depth to the background value
- Smoothing profile at boundary if needed
- LW: add volcanic aerosol optical depth to the background value

Definition at line 2181 of file radiation_aerosols.f.

References aer_property(), physcons::con_g, physparam::iaerflg, physparam::iaermdl, physparam::ivflip, ivolae, kmonsav, kyrsav, physparam::lalwflg, physparam::laswflg, physparam::lavoflg, nf_aelw, nlwbnd, nspc1, nswlwbd, and setgocartaer().

Referenced by module_radiation_driver::grrad().

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subroutine module_radiation_aerosols::setgocartaer ( )

private

This subroutine computes SW + LW aerosol optical properties for gocart aerosol species (merged from fcst and clim fields).

Parameters

alon	IMAX, longitude of given points in degree
alat	IMAX, latitude of given points in degree
prslk	(IMAX,NLAY), pressure in cb
rhlay	(IMAX,NLAY), layer mean relative humidity
dz	(IMAX,NLAY), layer thickness in m
hz	(IMAX,NLP1), level high in m
NSWLWBD	total number of sw+ir bands for aeros opt prop
prsl	(IMAX,NLAY), layer mean pressure in mb
tvly	(IMAX,NLAY), layer mean virtual temperature in K
trcly	(IMAX,NLAY,NTRAC), layer mean specific tracer in g/g
IMAX	horizontal dimension of arrays
NLAY,NLP1	vertical dimensions of arrays
ivflip	control flag for direction of vertical index =0: index from toa to surface =1: index from surface to toa
lsswr,lslwr	logical flag for sw/lw radiation calls
aerosw	(IMAX,NLAY,NBDSW,NF_AESW), aeros opt properties for SW (:,:,:,1): optical depth (:,:,:,2): single scattering albedo (:,:,:,3): asymmetry parameter
aerolw	(IMAX,NLAY,NBDLW,NF_AELW), aeros opt properties for LW (:,:,:,1): optical depth (:,:,:,2): single scattering albedo (:,:,:,3): asymmetry parameter

General Algorithm

Call map_aermr() to map input tracer array (trcly) to local tracer array (aermr).
Map geos-gocart climo (dmclmg) to gfs grids (dmclm).
Call aeropt_grt() to alculate sw/lw aerosol optical properties for the corresponding frequency bands.

Definition at line 4893 of file radiation_aerosols.f.

References aeropt_grt(), physcons::con_amd, physcons::con_rd, ctaer, dmclmg, geos_rlat, geos_rlon, get_clim, get_fcst, gocart_climo, imxg, physparam::ivflip, jmxg, kmxg, physparam::lalwflg, physparam::laswflg, map_aermr(), molwgt, nlwbnd, nmxg, nswlwbd, and psclmg.

Referenced by setaer().

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Detailed Description

Data Types

Variables

topospheric aerosol profile distribution

module variables for gocart aerosol optical properties

relative humidity independent aerosol optical properties:

relative humidity dependent aerosol optical properties:

module variables for gocart aerosol clim data set

Function/Subroutine Documentation

General Algorithm

General Algorithm

General Algorithm

General Algorithm

General Algorithm

General Algorithm

General Algorithm

General Algorithm