Characterization of atmospheric aerosols by an in-situ photometric technique in planetary environments

Details Characterization of atmospheric aerosols by an in-situ photometric technique in planetary environments Characterization of atmospheric aerosols by an in-situ photometric technique in planetary environments

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spie.4878...54c&link_type=abstract

First Jet Propulsion Laboratory In Situ Instruments Workshop. Edited by Bearman, Gregory H.; Beauchamp, Patricia M. Proceedi

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Propagation of solar ultraviolet (UV) radiation through the atmosphere of a planet is affected by the atmospheric composition. Therefore it indirectly influences the incidence of this harmful radiation on biological organisms. In Earth, the atmospheric parameters have been characterized by both direct measurements and indirect ground and space technologies. Among these parameters, the aerosols are the least known atmospheric constituents. In the case of Mars, there are two important aspects to be pointed out: the solar UV radiation reaching the surface is very high, and the amount of atmospheric aerosols is very large. Thus, the protective role of aerosols against the UV radiation in the Martian atmosphere is subject to be investigated. We propose to determine the characteristics of aerosols by using photometric techniques based on in-situ Earth-based experiments. Among these techniques, the Differential Optical Absorption Spectroscopy (DOAS) is considered one of the most suitable methods to determine the atmospheric aerosol optical thickness, which gives information about the aerosol atmospheric content and size distribution. The equipment to be developed is a photometric device, composed of a multi-sensor-channel array ranging in the visible (VIS) spectrum. The data thus obtained are inserted into an algorithm, which is developed also in this work, and the aerosol parameters are calculated.

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