The aerosols database from LITMS
(Laboratory for Information Technologies and Mathematical Simulation)

The LITMS archive consists of two parts :


FIRST PART : Complex indices of refraction computed aerosol integrated optical properties

Aerosol optical data from LITMS [of the Institute of Molecular Physics at the Russian Research Center "Kurchatov Institute", Rublev (1994)] such as: integrated optical properties (e.g.extinction coefficient, asymmetry factor, etc...) as well as refractive indices of the basic aerosol constituents (e.g. Dust-Like, Water-Soluble, Soot, Volcanic Ash, etc...), have been archived in the GEISA-03 subdatabase on Microphysical and Optical Properties of Atmospheric Aerosols.

Summarized lists of these data are given in Tables 1-3 :


Table 1 : Complex indices of refraction m=p-iq of basic aerosol components

Basic aerosol constituents	References
Water (liquid)	Zolatarev et al. (1984)
Dust	WMO (1986)
75 % H2SO4
Sea salt
Soot
Volcanic ash
Water-soluble particles

Table 2 : Integrated optical properties (extinction coefficient, single scattering albedo, asymmetry factor) of principal aerosol models (WMO, 1986)

Aerosol model	Basic aerosol constituents	Volume relative concentration (%)	Particle number relative concentration Ni/N(*)
Continental	Dust-Like Water-Soluble Soot	70 29 1	2.26278 10-6 9.37437 10-1 6.25607 10-2
Urban	Water-Soluble Soot Dust-Like	61 22 17	5.88931 10-1 4.11069 10-1 1.64128 10-7
Maritime	Ocean Water-Soluble	95 5	4.29942 10-4 9.99573 10-1
Stratospheric	75% H2SO4	100	1.0
Volcanic	Volcanic Ash	100	1.0
Cloudy	Water	100	1.0

Table 3 : Integrated optical properties (extinction coefficient, single scattering albedo, asymmetry factor) for basic aerosol constituent (computation by Rublev,1994)

Basic aerosol constituent

Dust-like particles t

water-soluble particles

Soot

Oceanic

SECOND PART : Computation of the integrated optical properties of atmospheric aerosols: the AERCOMP FORTRAN code

The FORTRAN code AERCOMP (UNIX version) has been developed at LITMS by Rublev, 1994. It allows calculations of the above basic aerosol integrated optical properties (see Table 3) for more complex, composite aerosol models with user's selected concentrations of constituents.

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REFERENCES