2010•Unpublished venueRequires access
Measurements of the Lidar Ratio for Asian Dust and Pollution Aerosols with a Combined Raman and Back-scatter Lidar
Seokchan Yoon, Y.J. Lee, S.W. Kim, M.H. Kim, Nobuo Sugimoto
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Abstract
The vertical profiles of the extinction coefficient, the backscatter coefficient, and the lidar ratio (i.e., extinction-to-backscattering ratio) for Asian dust and pollution aerosols are determined from Raman (inelastic) and elastic backscatter signals. The values of lidar ratios during two polluted days is found between 52 and 82 sr (July 22, 2009) and 40~60 sr (July 31, 2009) at 52 nm, with relatively low value of particle depolarization ratio ( 1.2). However, lidar ratios between 25 and 40 sr are found during two Asian dust periods (October 20, 2009 and March 15, 2010), with 10~20% of particle depolarization ratio and the relatively low value of sun photometer-derived Angstrom exponent (