Aerosol Optics: Light Absorption and Scattering by Particles by Alexander A. Kokhanovsky

By Alexander A. Kokhanovsky

This new textual content bargains skilled scholars a complete overview of obtainable strategies for the distant sensing of aerosols. those small debris impression either atmospheric visibility and the thermodynamics of the ambience. also they are of significant value in any attention of weather swap difficulties. Aerosols can also be answerable for the lack of harvests, human illnesses and ecological failures. therefore, this specific research of aerosol houses on a world scale couldn't be extra timely.

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Extra info for Aerosol Optics: Light Absorption and Scattering by Particles in the Atmosphere (Springer Praxis Books / Environmental Sciences)

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1Þ all light, which penetrates the surface of a particle is absorbed. Then the absorption efficiency factor is equal to the fraction of light energy A, which penetrates the surface (Kokhanovsky, 2004a). This fraction can be estimated from the fraction of reflected energy: A ¼ 1 À r. The value of r for very large particles can be found using Fresnel reflection coefficients Ri : ~¼ E 2 1X r¼ 2 i¼1 Zp=2 jRi ðuÞj2 sin u cos u du; 0 where R1 ¼ cos u À m cos w ; cos u þ m cos w R2 ¼ m cos u À cos w ; m cos u þ cos w u is the incidence angle and w ¼ arcsinðsin u=mÞ is the refraction angle.

G. , propagation of laser pulses) and frequency change in the scattering processes. , lasing in aerosol media) are omitted. Even with so many simplified assumptions, the radiative transfer equation (RTE) has the following complicated form: Z ksca ~ t ð~ r; ~ nÞ ¼ Àkext It ð~ r; ~ nÞ þ r; ~ n0 Þ d~ r; ~ nÞ; pð~ n; ~ n0 ÞIt ð~ n0 þ B0 ð~ ð~ n grad gradÞI 4p 4p where ~ r ¼ x~ lx þ y~ ly þ z~ lz is the radius-vector of the observation point, the vector ~ r; ~ nÞ is ey þ n~ ez determines the direction of beam with the intensity It, B0 ð~ n ¼ l~ ex þ m~ the internal source function.

Then it follows that 8 1 Z2p Zs

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