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Dust aerosol retrieval results from MISR (multi-angle imaging spectro-radiometer)

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dc.contributor.author Kalashnikova, Olga V.
dc.contributor.author Diner, David J.
dc.contributor.author Kahn, Ralph
dc.contributor.author Gaitley, Barbara
dc.date.accessioned 2006-06-20T14:50:30Z
dc.date.available 2006-06-20T14:50:30Z
dc.date.issued 2004-11-08
dc.identifier.citation Remote Sensing of the Atmosphere, Ocean, Enironment, and Space, Honolulu, Hawaii, November 8-11, 2004 en
dc.identifier.clearanceno Remote Sensing of the Atmosphere, Ocean, Enironment, and Space, Honolulu, Hawaii, November 8-11, 2004
dc.identifier.clearanceno 04-3371
dc.identifier.uri http://hdl.handle.net/2014/39392
dc.description.abstract Satellite measurements provide important tools for understanding the effect of mineral dust aerosols on past and present climate and climate predictions. Multi-angle instruments such as Multi-angle Imaging Spectro- Radiometer (MISR) provide independent constraints on aerosol properties based on their sensitivity to the shape of aerosol scattering phase functions. The current MISR operational retrieval algorithm (version 16 and higher) was modified by incorporating new non-spherical dust models that account for naturally occurring dust shapes and compositions. We present selected examples of MISR version 16 retrievals over AERONET sunphotometer land and ocean sites during the passage of dust fronts. Our analysis shows that during such events MISR retrieves Angstrom exponents characteristic of large particles, having little spectral variation in extinction over the MISR wavelength range (442, 550, 672 and 866 nm channels), as expected. The retrieved fraction of non-spherical particles is also very high. This quantity is not retrieved by satellite instruments having only nadir-viewing cameras. Our comparison of current (version 16) MISR-retrieved aerosol optical thickness (AOT) with AERONET instantaneous AOT shows better coverage and stronger correlations than when making identical comparisons with previous AOT retrievals (version 15). The MISR algorithm successful mixtures include a non-spherical dust component with high frequency in retrievals over dark water and slightly lower frequency over land. Selection frequencies of non-spherical dust models also decrease in dusty regions affected by pollution. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 1288395 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2004. en
dc.subject Multiangle Imaging Spectroradiometer (MISR) en
dc.subject retrievals en
dc.subject atmopheric dust en
dc.title Dust aerosol retrieval results from MISR (multi-angle imaging spectro-radiometer) en
dc.type Preprint en


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