Monitoring of Integrated Aerosol Content in the Martian Atmosphere from PFS-MEX Data

Details Monitoring of Integrated Aerosol Content in the Martian Atmosphere from PFS-MEX Data Monitoring of Integrated Aerosol Content in the Martian Atmosphere from PFS-MEX Data

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005dps....37.3316r&link_type=abstract

American Astronomical Society, DPS meeting #37, #33.16; Bulletin of the American Astronomical Society, Vol. 37, p.695

Astronomy and Astrophysics

Astronomy

Scientific paper

The solar radiation mesured by PFS inside the 2.7 μ m CO2 band can give information about the aerosols present in the Martian atmosphere. Up today in the leterature the work of Titov et al. Indicate a direct relation between radiance level and aerosols dust opacity. Interpreted accordingly, PFS data would indicate that an extremely high dust opacity is observed in the northem summer season. We show here, computing a number of synthetic spectra (numerical experiments performed for different conditions), that high altitudes water ice clouds can significantly contribute to the observed radiation level. Also the vertical profile of dust (exponential) versus high altitude dust leyers can change drammatically the observed radiance level. The results from our calculation, and their comparison with PFS data, indicate that in the northem summer we have to consider type II dust / water ice particles of size up to 3-4\ mum. A model of dust grains covered by water ice has been used to describe a high altitude dust/ice cloud. The results indicate good fitting of some aspects of the observation, but the radiance slope inside the 2.7 μ m CO2 band indicate the need to change dust composition.

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