Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6317098 | Environmental Pollution | 2013 | 11 Pages |
Abstract
We analyzed the source-receptor relationships for particulate polycyclic aromatic hydrocarbon (PAH) concentrations in northeastern Asia using an aerosol chemical transport model. The model successfully simulated the observed concentrations. In Beijing (China) benzo[a]pyren (BaP) concentrations are due to emissions from its own domain. In Noto, Oki and Tsushima (Japan), transboundary transport from northern China (>40°N, 40-60%) and central China (30-40°N, 10-40%) largely influences BaP concentrations from winter to spring, whereas the relative contribution from central China is dominant (90%) in Hedo. In the summer, the contribution from Japanese domestic sources increases (40-80%) at the 4 sites. Contributions from Japan and Russia are additional source of BaP over the northwestern Pacific Ocean in summer. The contribution rates for the concentrations from each domain are different among PAH species depending on their particulate phase oxidation rates. Reaction with O3 on particulate surfaces may be an important component of the PAH oxidation processes.
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Authors
Yayoi Inomata, Mizuo Kajino, Keiichi Sato, Toshimasa Ohara, Jun-ichi Kurokawa, Hiromasa Ueda, Ning Tang, Kazuichi Hayakawa, Tsuyoshi Ohizumi, Hajime Akimoto,