HR: 0830h
AN: A11E-0012    [PDF]
TI: Retrieving mineral dust composition, size and shape (CSS) properties from multi-angle remote sensing observations.
AU: * Kalashnikova, O V
EM: olgak@jord.jpl.nasa.gov
AF: Jet Propulsion Laboratory, MS 169-237 4800 Oak Grove Dr., Pasadena, CA 91109 United States
AU: Kahn, R
EM: ralph.kahn@jpl.nasa.gov
AF: Jet Propulsion Laboratory, MS 169-237 4800 Oak Grove Dr., Pasadena, CA 91109 United States
AU: Sokolik, I N
EM: isokolik@eas.gatech.edu
AF: Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, GA 30332-0340
AB: We present a systematic study of radiative properties of atmospheric wind-blown mineral dust, focusing on the implications for multi-angle and multi-spectral remote sensing. We investigate the impact of particle irregularity, composition, and size distribution on extinction coefficients, single scattering albedo and scattering phase functions for three visible-NIR channels of the Multi-angle Imaging SptectoRadiometer (MISR) instrument: 550, 672 and 866 nm, taking into account the spectral dependence of mineral dust refractive indices. We develop optical models of mineral dust for different composition-size-shape (CSS) types, and use them to test the ability of MISR to distinguish different mineral dust type and amount. Modeled radiancies are systematically compared with MISR measured radiancies for several optically thick dust cases, allowing us to verify the main features of Saharan and Asian dust to which the instrument is sensitive.
DE: 0305 Aerosols and particles (0345, 4801)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting