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Atmospheric Composition

The Multi-angle Imaging SpectroRadiometer (MISR) has been observing the entire Earth about once per week since February 2000. During this period we developed, refined, and validated global aerosol products that retrieve aerosol optical depth (AOD) over water and land, including bright surfaces such as desert source regions and urban areas. We also retrieve a combination of column-average particle size, shape, and single-scattering albedo (SSA) constraints that can distinguish broad categories of aerosol air mass types, and from the stereo imaging, obtain plume heights in aerosol source regions.

This proposal aims to apply MISR products to a range of key global and regional aerosol questions, taking advantage of the unique information provided by MISR, building on our experience coordinating with field observers, integrating our data with MODIS, CALIPSO, and other satellite observations, and beginning to perform aerosol transport model validation with these data. We plan to focus on: (1) completing the definition and mapping of aerosol air mass types globally, as outlined in Kahn et al. [2001a] and demonstrated in Kahn et al. [2008b]; (2) assessing the regional influences of aerosol pollution, dust, and smoke, focused on integrated analysis of SAMUM, UAE2, and INTEX-B field campaign data; (3) building a climatology of transported dust plume evolution following Kalashnikova and Kahn [2008], and characterizing dust sources; and (4) using MISR AOD, aerosol air mass type maps, and dust and wildfire plume climatologies [e.g., Kahn et al., 2008a] to validate and refine chemical transport model source, transport, and sink simulations, and to use the validated models for assessing trans-oceanic aerosol material fluxes and regional direct aerosol radiative forcing of climate.

This proposal requests 1.4 FTE of support, leveraging related work supported by existing grants to our collaborators, and algorithm refinement and validation efforts funded by the MISR project.

Project PI: Ralph Kahn/NASA Goddard Space Flight Center

NASA/GSFC Mail Code 613.2,Climate and Radiation, NASA, Goddard Space Flight Center, Greenbelt 20771 ,United States

Phone: (301)614-6193

Email: ralph.kahn@nasa.gov

http://www.agci.org/programs/past_workshop_participants/about_the_scientist/participant_details.php?recordID=2551

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Started: Sep 03, 2010

Last Activity: Feb 02, 2011

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