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

doi:10.1117/12.417092

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 journal › Article › peer-review

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 language	English
Pages (from-to)	559-566
Number of pages	8
Journal	Proceedings of SPIE-The International Society for Optical Engineering
Volume	4153
DOIs	https://doi.org/10.1117/12.417092
Publication status	Published - 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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10.1117/12.417092

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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.",

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AU - Wei, He

AU - Koga, Ryuji

AU - Iokibe, Kengo

AU - Wada, Osami

AU - Toyota, Yoshitaka

AU - Kagawa, Naoki

PY - 2001/1/1

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N2 - 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.

AB - 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.

KW - Asian dust (Kosa)

KW - Depolarization ratio

KW - Mie lidar

KW - Range-normalized signal

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

Abstract

Keywords

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