HR: 0800h
AN: A41B-0445    [Abstracts]
TI: Numerical solution of single-scattering properties of dust
AU: Lin, B
AF: Atmospheric Sciences, NASA Langley Research Center, Mail Stop 420, NASA Langley Research Center, Hampton, VA 23681, United States
AU: * Sun, W
AF: Center for Atmospheric Sciences, Hampton University, Mail Stop 420, NASA Langley Research Center, Hampton, VA 23681, United States
AB: Satellite or airborne measurements show significant difference between dust aerosols and cloud particles in light scattering properties. The modeling of single scattering properties of dust particles is important for remote sensing of regional or global climate. In this work, light scattering by irregularly-shaped dust particles is studied with the finite-difference time domain technique. For given Gaussian particle shapes and size parameters in the resonance region, the scattering phase matrices and asymmetry factors are calculated. It is found that the deformation of the particle surface can significantly smooth the scattering phase functions. The polarization properties of the scattered light by irregular dust particles are also significantly different from those by spherical particles. Based on the polarization properties of scattered light from dust aerosols, a remote sensing method which could accurately measure the shapes of the dust particles is proposed.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 4801 Aerosols (0305, 4906)
DE: 4906 Aerosols (0305, 4801)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting