Observation of Asian dust aerosols with depolarization lidar using a coherent white light continuum

College

College of Science

Department/Unit

Physics

Document Type

Article

Source Title

Japanese Journal of Applied Physics

Volume

47

Issue

4 PART 1

First Page

2155

Last Page

2157

Publication Date

4-18-2008

Abstract

We performed a lidar observation of Asian dust aerosols for the first time using a white light lidar system. The lidar used in the observation utilized a coherent white light continuum generated in Kr gas as a light source and was used as a three-wavelength Mie-scattering lidar having a depolarization measurement capability at 450, 550, and 800 nm. Lidar depolarization ratios of 0.30-0.70 at 800nm were measured. These data reveal a higher depolarization ratio than usual (normally almost zero) in the lower troposphere. Thus, the white light lidar can identify Asian dust particles that pose a threat to cross-border pollution in Japan. © 2008 The Japan Society of Applied Physics.

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Digitial Object Identifier (DOI)

10.1143/JJAP.47.2155

Disciplines

Physics

Keywords

Dust--Asia; Optical radar; Wavelengths

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