Multistatic lidar measurements of non-spherical aerosols
2013
Lidar is a powerful tool for measuring the vertical profiles of aerosols in the atmosphere using Rayleigh and Raman lidar
techniques. Bistatic lidar can be used to obtain the angular structure of the scattered light. When the aerosols are
uniformly distributed, this information can be analyzed to provide particle size distribution information. However, dusts
tend to be irregularly shaped particles with varied composition. We investigate the impact of the irregular shape using
optical scattering at several wavelengths, scanning electron microscopy, and T-matrix calculations. In particular, we
study the rapid loss of Mie scattering resonances as the particle shape departs from spherical. Different size distributions
produced by different size-cuts of Arizona Road Dust (ARD) are studied.
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