Dust optical properties retrieved from ground-based polarimetric measurements
| Autor: | Luc Blarel, I. Jankowiak, Thierry Podvin, Philippe Goloub, Zhengqiang Li, Bahaiddin Damiri |
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| Rok vydání: | 2007 |
| Předmět: |
Physics
Aerosols business.industry Scattering Forward scatter Linear polarization Materials Science (miscellaneous) Polarimetry Diffuse sky radiation Dust Albedo Mineral dust Industrial and Manufacturing Engineering AERONET Photometry Optics Image Interpretation Computer-Assisted Business and International Management Particle Size business Algorithms Remote sensing |
| Zdroj: | Applied optics. 46(9) |
| ISSN: | 1559-128X |
| Popis: | We have systematically processed one year of sunphotometer measurements (recorded at five AERONET/PHOTONS sites in Africa) in order to assess mineral dust optical properties with the use of a new polarimetry-based algorithm. We consider the Cimel CE318 polarized sunphotometer version to obtain single-scattering albedo, scattering phase matrix elements F(11) and F(12) for dust aerosols selected with Angstrom exponents ranging from -0.05 to 0.25. Retrieved F(11) and F(12) differ significantly from those of spherical particles. The degree of linear polarization -F(12)/F(11) for single scattering of atmospheric total column dust aerosols in the case of unpolarized incident light is systematically retrieved for the first time to our knowledge from sunphotometer measurements and shows consistency with previous laboratory characterizations of nonspherical particles. |
| Databáze: | OpenAIRE |
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