Depolarization properties of Asian dust (Kosa) measured in 1998-2000 at Okayama, Japan

He Wei, Ryuji Koga, Kengo Iokibe, Osami Wada, Yoshitaka Toyota, Naoki Kagawa

Research output: Contribution to journalArticle

Abstract

A Mie lidar system was built at Okayama University in 1998. The system is featured by the ability of discriminating depolarization of received signals with a spatial resolution of 15m. Examinations were conducted on the received range-normalized signal and the depolarization ratio from Asian dust. Intense Asian dust occurred in springs of 1998-2000. Vertical distribution of Asian dust was found to be inhomogeneous contrary to the homogeneity assumption employed in preceding works. Multiple scattering in the layers of Asian dust also observed. Complicated structure of Asian dust wrapped by liquid or water droplets were also conjectured from the sudden changes of depolarization ratio in Asian dust layers.

Original languageEnglish
Pages (from-to)559-566
Number of pages8
JournalProceedings of SPIE-The International Society for Optical Engineering
Volume4153
DOIs
Publication statusPublished - Jan 1 2001

Keywords

  • Asian dust (Kosa)
  • Depolarization ratio
  • Mie lidar
  • Range-normalized signal

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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