Aerosols and Clouds

Optical properties of aerosols during APEX and ACE-Asia experiments

  1. Itaru Sano1,
  2. Sonoyo Mukai1,
  3. Yasuhiko Okada1,
  4. Brent N. Holben2,
  5. Sachio Ohta3,
  6. Tamio Takamura4

Article first published online: 6 SEP 2003

DOI: 10.1029/2002JD003263

Issue

Journal of Geophysical Research: Atmospheres (1984–2012)

Journal of Geophysical Research: Atmospheres (1984–2012)

Volume 108, Issue D23, 16 December 2003

Additional Information

How to Cite

Sano, I., S. Mukai, Y. Okada, B. N. Holben, S. Ohta, and T. Takamura (2003), Optical properties of aerosols during APEX and ACE-Asia experiments, J. Geophys. Res., 108, 8649, doi:10.1029/2002JD003263, D23.

Author Information

  1. 1

    Faculty of Science and Technology, Kinki University, Osaka, Japan

  2. 2

    NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

  3. 3

    Graduate School of Engineering, Hokkaido University, Sapporo, Japan

  4. 4

    Center for Environmental Remote Sensing, Chiba University, Inage, Japan

Publication History

  1. Issue published online: 6 SEP 2003
  2. Article first published online: 6 SEP 2003
  3. Manuscript Accepted: 27 MAR 2003
  4. Manuscript Revised: 5 MAR 2003
  5. Manuscript Received: 30 NOV 2002

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Keywords:

  • aerosol optical thickness;
  • Asian dust;
  • AERONET;
  • ACE-Asia;
  • APEX

[1] Sun/sky photometry and polarimetry of atmospheric light have been undertaken by multispectral photometers (CE-318-1 and -2, Cimel Electronique, France) and a polarimeter (PSR-1000, Opto Research, Japan) over Amami, Noto, and Shirahama, Japan, during APEX-E1, -E2, and ACE-Asia field campaigns. Radiometers provide us with the optical thickness of aerosols and Ångström exponent. Other aerosol characteristics, e.g., size distribution, refractive index, etc., are retrieved based on each inversion method corresponding each equipment. The former takes a standard AERONET processing, and the latter is according to our own procedure to analyze the polarimetry with PSR-1000. After several aerosol parameters are derived, the HYSPLIT4 backward trajectory analysis is adopted to search the origin of aerosols. It is shown from these ground measurements that aerosol optical thickness, Ångström exponent, and refractive index are classified into two typical categories as a background type detected in winter, and a soil dust type appeared in Asian dust events in spring. Further, it is found that the obtained size distribution of Asian dust indicates the dominance of large particles.

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