Contribution of urban and transboundary air pollution to PM2.5 concentrations in Sapporo
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- BANNAI Toshiaki
- FUJITSU FIP Corporation
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- MURAO Naoto
- Division of Environmental Engineering, Graduate School of Engineering, Hokkaido University
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- YAMAGATA Sadamu
- Division of Environmental Engineering, Graduate School of Engineering, Hokkaido University
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- YAMAGUCHI Takashi
- Institute of Environmental Sciences, Environmental and Geological Department, Hokkaido Research Organization
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- FUKASAWA Tatsuya
- Division of Environmental Engineering, Graduate School of Engineering, Hokkaido University
Bibliographic Information
- Other Title
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- 札幌市のPM2.5濃度に対する都市・越境汚染の寄与評価
- サッポロシ ノ PM2.5 ノウド ニ タイスル トシ ・ エッキョウ オセン ノ キヨ ヒョウカ
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Abstract
Elevated particulate matter (PM) concentrations in urban atmosphere in Japan are associated with fine particles emitted and/or formed in an urban area and those transported from the Asian continents. It is thus important to know each contribution for the improvement of urban PM pollution. In this study, a new approach to evaluate transboundary PM pollution is developed based on the measurement of optical properties of fine particles such as SSA (Single Scattering Albedo) and B/N ratio (absorption coefficient/fine particle number concentration), and applied to Sapporo, Japan. The results suggest that during the observation period (June - Dec. 2014), transboundary pollution contributed more than 70% to the PM concentrations in Sapporo, and that transboundary pollution contribution has a seasonal variation with a decrease in summer and an increase in autumn. The approach is expected to serve as an important tool towards effective measures for PM pollution control in Japan.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 71 (5), I_227-I_233, 2015
Japan Society of Civil Engineers
