Read e-book online Aerosol Optics: Light Absorption and Scattering by Particles PDF

By Alexander A. Kokhanovsky

ISBN-10: 3540237348

ISBN-13: 9783540237341

This new textual content deals skilled scholars a finished assessment of obtainable innovations for the distant sensing of aerosols. those small debris impact 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 chargeable for the lack of harvests, human illnesses and ecological mess ups. hence, this precise learn of aerosol houses on a world scale couldn't be extra well timed.

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Read Online or Download Aerosol Optics: Light Absorption and Scattering by Particles in the Atmosphere (Springer Praxis Books Environmental Sciences) PDF

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

Example text

2003). 28 2 Optical properties of atmospheric aerosol The results of numerical calculations of Qabs using Mie theory are shown in Fig. 4(a) for the same range of parameters n and x as in Fig. 1. 008. Single-scattering albedo calculated for the same conditions as in Fig. 4(a) is presented in Fig. 4(b). It follows that single-scattering albedo generally increases with the size of particles. Often approximate relations for the local optical parameters of an aerosol medium are used. They make it possible to avoid tedious numerical calculations and to make quick estimates of corresponding optical parameters.

2. 9890 Note that the integration with respect to the particle size distribution for the data shown in Figs. 005–20 lm. Mathematically speaking, the upper radius must be increased considerably for coarse and oceanic aerosols. However, it is believed that the cutoff at large radii is really necessary for a better representation of realistic microphysical and optical characteristics of atmospheric aerosols. This also means that it is not enough to give the pair ða0 ; rÞ in the output of aerosol particle size distribution retrieval algorithms.

Optical acoustic spectrometry is based on measurements of energy of a sound wave generated by the expansion of the air due to aerosol absorption of light from a modulated source. This absorption causes periodic heating and the subsequent expansion of the surrounding air at the modulation frequency (Pao, 1977). The practical use of the method is limited due to relatively low sensitivity and the use of inefficient light sources. However, important progress has been made in recent years to overcome the limitations of the technique (Lack, 2006).

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Aerosol Optics: Light Absorption and Scattering by Particles in the Atmosphere (Springer Praxis Books Environmental Sciences) by Alexander A. Kokhanovsky

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