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AGU: Journal of Geophysical Research, Atmospheres

 

Index Terms

  • Atmospheric Composition and Structure: Aerosols and particles
  • Atmospheric Composition and Structure: Troposphere—composition and chemistry
  • Atmospheric Composition and Structure: Instruments and techniques
  • Global Change: Atmosphere
  • Global Change: Remote sensing
Abstract
Cited By (4)
 

Abstract

Optical properties of aerosols during APEX and ACE-Asia experiments

Itaru Sano

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

Sonoyo Mukai

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

Yasuhiko Okada

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

Brent N. Holben

NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

Sachio Ohta

Graduate School of Engineering, Hokkaido University, Sapporo, Japan

Tamio Takamura

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

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.

Received 30 November 2002; accepted 27 March 2003; published 6 September 2003.

Citation: 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(D23), 8649, doi:10.1029/2002JD003263.

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