Trans-boundary air pollution over remote islands in Japan: Observed data and estimates from a numerical model

Kentaro Murano, Hitoshi Mukai, Shiro Hatakeyama, Eun Suk Jang, Itsushi Uno

研究成果: ジャーナルへの寄稿Conference article

29 引用 (Scopus)

抄録

Observations of air pollutants were conducted in remote Japanese islands (Oki Island and Okinawa Island) in early spring to clarify the extent of trans-boundary air pollution from the Asian continent. A three-dimensional Eulerian model calculation, which included parameters on emission, transport and transformation of sulfur oxides, nitrogen oxides and ammonia, was performed to compile sulfate isosurface concentrations over the observational sites. Concentrations of non-sea-salt sulfate (nss-SO4 2-) of greater than 10μgm-3 were observed at Oki after the northeastward passage of low-pressure systems in the Sea of Japan. At these times, the weather showed a typical winter pattern and air pollutants over China were transported southeastward to Japan with the northwesterly wind. The model calculation reproduced the observed variations of nss-SO4 2- concentration well, except for one case in which the model calculation could not reproduce the extremely low nss-SO4 2- concentration observed on 8 March. In Hedo (Okinawa Island), we observed long-lasting (3 days) medium concentrations of nss-SO4 2- (approximately 5μgm-3). Although the model reproduced these observed medium concentrations well, in general the observed results were reproduced better for Oki than for Hedo. Under the synoptic weather conditions of early spring, high concentrations of nss-sulfate were sometimes transported to these remote Japanese islands from areas of continental Asia with a strong outflow of air pollutants. Copyright (C) 2000 Elsevier Science B.V.

元の言語英語
ページ(範囲)5139-5149
ページ数11
ジャーナルAtmospheric Environment
34
発行部数29-30
DOI
出版物ステータス出版済み - 1 1 2000
イベント6th Scientific Conference of the International Global Atmospheric Chemistry Project (IGAC) - Bologna, Italy
継続期間: 9 13 19999 17 1999

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atmospheric pollution
sulfate
Eulerian analysis
low pressure system
nitrogen oxides
outflow
ammonia
salt
weather
winter
calculation
air pollutant

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Atmospheric Science

これを引用

Trans-boundary air pollution over remote islands in Japan : Observed data and estimates from a numerical model. / Murano, Kentaro; Mukai, Hitoshi; Hatakeyama, Shiro; Suk Jang, Eun; Uno, Itsushi.

:: Atmospheric Environment, 巻 34, 番号 29-30, 01.01.2000, p. 5139-5149.

研究成果: ジャーナルへの寄稿Conference article

Murano, Kentaro ; Mukai, Hitoshi ; Hatakeyama, Shiro ; Suk Jang, Eun ; Uno, Itsushi. / Trans-boundary air pollution over remote islands in Japan : Observed data and estimates from a numerical model. :: Atmospheric Environment. 2000 ; 巻 34, 番号 29-30. pp. 5139-5149.
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