A Difference of the Depolarization Ratio Detected at Locally Generated Dust and Transported Asian Dust Over Japan with AD-Net | SpringerLink
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A Difference of the Depolarization Ratio Detected at Locally Generated Dust and Transported Asian Dust Over Japan with AD-Net

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Proceedings of the 30th International Laser Radar Conference (ILRC 2022)

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Abstract

The depolarization ratio near the surface measured by lidars in AD-Net (Asian dust and aerosol lidar observation network) was utilized to distinguish the long-range transported Asian dust and locally generated dust over Japan. In February 2017, locally generated dusts were frequently observed in Tsukuba, and May 2017 was a typical month of Asian dust. Thus, two histograms of depolarization ratio constructed from observational data of these 2 months were compared, and a 0.4 (40%) was identified as a threshold of two kinds of mineral dust particles: locally generated (large) dust and long-range transported Asian dust. A climatological analysis of data obtained by four lidars in Japan revealed that the local dust events were not observed in other regions of Japan.

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Acknowledgements

This work was supported by the Environment Research and Technology Development Fund (JPME20205001) of the Environmental Restoration and Conservation Agency provided by Ministry of the Environment of Japan.

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Authors and Affiliations

  1. National Institute for Environmental Studies, Tsukuba, Japan

    Atsushi Shimizu, Tomoaki Nishizawa, Yoshitaka Jin & Nobuo Sugimoto

Authors
  1. Atsushi Shimizu
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  2. Tomoaki Nishizawa
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  3. Yoshitaka Jin
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  4. Nobuo Sugimoto
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Corresponding author

Correspondence to Atsushi Shimizu .

Editor information

Editors and Affiliations

  1. NASA Goddard Space Flight Center, Greenbelt, MD, USA

    John T. Sullivan

  2. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA

    Thierry Leblanc

  3. Ball Aerospace & Technologies Corp., Boulder, CO, USA

    Sara Tucker

  4. Department of Physics, University of Maryland, Baltimore County, Baltimore, MD, USA

    Belay Demoz

  5. Department of Atmospheric and Oceanic Sciences, University of Wisconsin‑Madison, Madison, WI, USA

    Edwin Eloranta

  6. NASA Langley Research Center, Hampton, VA, USA

    Chris Hostetler

  7. Department of Aeronautics and Astronautics, Tokyo Metropolitan University, Hino-shi, Tokyo, Japan

    Shoken Ishii

  8. Institute of Methodologies for Environmental Analysis, National Research Council of Italy (CNR), Potenza, Italy

    Lucia Mona

  9. Department of Electrical Engineering, The City College of New York, New York, NY, USA

    Fred Moshary

  10. School of Applied Mathematical and Physical Sciences, National Technical University of Athens, Athens, Greece

    Alexandros Papayannis

  11. Montana State University, Bozeman, MT, USA

    Krishna Rupavatharam

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Shimizu, A., Nishizawa, T., Jin, Y., Sugimoto, N. (2023). A Difference of the Depolarization Ratio Detected at Locally Generated Dust and Transported Asian Dust Over Japan with AD-Net. In: Sullivan, J.T., et al. Proceedings of the 30th International Laser Radar Conference. ILRC 2022. Springer Atmospheric Sciences. Springer, Cham. https://doi.org/10.1007/978-3-031-37818-8_104

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