Simultaneous measurements of particulate elemental carbon on the ground observation network over the western North Pacific during the ACE-Asia campaign

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Read Full Article (file size: 528863 bytes) Cited by JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 108, NO. D23, 8635, doi:10.1029/2002JD002744, 2003 Simultaneous measurements of particulate elemental carbon on the ground observation network over the western North Pacific during the ACE-Asia campaign Kiyoshi Matsumoto Ocean Research Institute, University of Tokyo, Tokyo, Japan Japan Science and Technology Cooperation, Kawaguchi, Japan Mitsuo Uematsu Ocean Research Institute, University of Tokyo, Tokyo, Japan Teruaki Hayano Ocean Research Institute, University of Tokyo, Tokyo, Japan Katsuhiro Yoshioka Shimane Prefectural Institute of Public Health and Environmental Science, Matsue, Japan Hiroshi Tanimoto National Institute for Environmental Studies, Tsukuba, Japan Takao Iida Graduate School of Engineering, Nagoya University, Nagoya, Japan Abstract The measurements of atmospheric aerosol and associated species have been carried out on the ground observation network over the western North Pacific as part of the Variability of Marine Aerosol Properties (VMAP) project. The network consists of four Japanese islands (Rishiri, Sado, Hachijo, and Chichi-jima), ranging widely in latitudes from 25°N to 45°N along with the line of 140°E. In this paper, we report on simultaneous measurements of particulate elemental carbon (EC) on the four islands from March to May 2001, which cooperated with the Asia-Pacific Regional Aerosol Characterization Experiment (ACE-Asia) campaign, in order to characterize the outflow patterns of continental polluted air masses to the North Pacific. The mean concentrations of particulate EC in the four islands during this period ranged from 0.18 to 0.60 μg m⁻³. It is interesting to note that the temporal variations in the concentrations of particulate EC in Rishiri and Sado, which are located in the northern region of Japan (35°N–45°N), synchronized with each other. The EC concentrations in Hachijo and Chichi-jima, located in the southern region of Japan (25°N–35°N), also showed similar temporal variations with each other but did not synchronize with those in Rishiri and Sado. These results demonstrate that the transport patterns of the polluted air masses from the east Asian continent to the northern regions of the northwestern Pacific are often different from those to the southern regions. It was also found that continental air masses are usually accompanied by pollutants over the southern regions but not over the northern regions of the northwestern Pacific. Received 11 July 2002; accepted 14 January 2003; published 15 August 2003. Index Terms: 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801); 0345 Atmospheric Composition and Structure: Pollution—urban and regional (0305); 0368 Atmospheric Composition and Structure: Troposphere—constituent transport and chemistry. Read Full Article (file size: 528863 bytes) Cited by Citation: Matsumoto, K., M. Uematsu, T. Hayano, K. Yoshioka, H. Tanimoto, and T. Iida (2003), Simultaneous measurements of particulate elemental carbon on the ground observation network over the western North Pacific during the ACE-Asia campaign, J. Geophys. Res., 108(D23), 8635, doi:10.1029/2002JD002744. Copyright 2003 by the American Geophysical Union.

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