Light reflected by an atmosphere containing irregular mineral dust aerosol

Details Light reflected by an atmosphere containing irregular mineral dust aerosol Light reflected by an atmosphere containing irregular mineral dust aerosol

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3104113v&link_type=abstract

Geophysical Research Letters, Volume 31, Issue 4, CiteID L04113

Physics

13

Atmospheric Composition And Structure: Aerosols And Particles (0345, 4801), Atmospheric Composition And Structure: Planetary Atmospheres (5405, 5407, 5409, 5704, 5705, 5707), Atmospheric Composition And Structure: Transmission And Scattering Of Radiation, Electromagnetics: Scattering And Diffraction, Meteorology And Atmospheric Dynamics: Remote Sensing

Scientific paper

We simulate polarimetric satellite observations of sunlight reflected by a turbid atmosphere over the ocean. We determine the sensitivity of these observations with respect to the optical thickness and the single-scattering albedo of irregular mineral aerosol. Simulated results indicate that both quantities can be retrieved from simultaneous polarization and intensity measurements. Aerosol scattering is modelled using a true measured scattering matrix of irregularly-shaped mineral dust aerosol. We study the suitability of various approximations of the particle shape used for the numerical calculation of scattering matrices. Approximations with spheres or spheroids with a distribution of moderate axis ratios can lead to large errors of the simulated light intensities. A spheroidal approximation including extreme axis ratios is found to be the most appropriate one for simulations of light scattering by irregular mineral aerosol particles, if measured scattering matrices are not available.

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