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Disentangling the contribution of the transboundary out-flow from the Asian continent to Tokyo, Japan
- Title
- Disentangling the contribution of the transboundary out-flow from the Asian continent to Tokyo, Japan
- Authors
- Shimada, Kojiro; Mizukoshi, Manatsu; Chan, Chak K.; Kim, Yong Pyo; Lin, Neng-Huei; Matsuda, Kazuhide; Itahashi, Syuichi; Nakashima, Yoshihiro; Kato, Shungo; Hatakeyama, Shiro
- Ewha Authors
- 김용표
- SCOPUS Author ID
- 김용표
- Issue Date
- 2021
- Journal Title
- ENVIRONMENTAL POLLUTION
- ISSN
- 0269-7491
1873-6424
- Citation
- ENVIRONMENTAL POLLUTION vol. 286
- Keywords
- Long range transport; Size-segregated ion components; Size-segregated elements; Urban aerosol; Contributions to aerosols in Tokyo; Urban site
- Publisher
- ELSEVIER SCI LTD
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- We assessed the contribution of transboundary air pollutants (TAPs) transported from China to Tokyo using the Pb-(0.5<Dp < 1)/Cu-(2.5<Dp < 10) index. We conducted intensive observations over four seasons during 2014-2015 and analyzed ionic components and thirteen elements in size-segregated aerosols collected at the top of a 30-m-high tower in a hilly forested area of the Field Museum Tamakyuryo (FM Tama), in a western suburb of Tokyo. In order to evaluate if the Pb-(0.5<Dp < 1)/Cu-(2.5<Dp < 10) ratio can be applied in Tokyo as the megacity, the annual average concentration of Pb at Cape Hedo, Kumamoto city, on the west side of Japan, was higher than that of Pb at Tokyo, on the east side; this result indicates that TAPs affect western Japan more than eastern Japan. We inferred the main source of Cu to be braking abrasion from cars at local scale on the basis of its enrichment factor and size distribution. From the Pb-(0.5<Dp < 1)/Cu-(2.5<Dp < 10) ratio and sulfate concentration, we inferred that the highest contribution of TAPs to the total mass concentration in Tokyo occurred in spring, when TAPs accounted for 55%, 72%, and 53% of the total mass concentration in the 0.1 < Dp < 0.5, 0.5 < Dp < 1, and 1 < Dp < 2.5 fractions, respectively. These results can contribute to assessment of TAPs in Tokyo.
- DOI
- 10.1016/j.envpol.2021.117280
- Appears in Collections:
- 공과대학 > 화공신소재공학과 > Journal papers
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