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[C-1.1.1 Contribution of Transboundary Air Pollution from Asian Continent with Isotope Ratio Determination and Compilation of Deposition Map of Acidic Compounds(Final Report)]

[Contact Person]

Kentaro Murano
Senior Research Scientist
Global Environment Division
National Institute for Environmental Studies
Environment Agency
16-2 Onogawa, Tsukuba, Ibaraki 305 Japan
Phone +81-298-50-2537, Fax +81-298-51-4732
E-mail murano@nies.go.jp

[Total Budget for FY1993-1995]

60,497,000 Yen (FY 1995 20,173,000 Yen)

[Abstract]

　In order to clarify the behavior of atmospheric pollutants, observations of atmospheric pollutants have been carried out at several places where the air pollutants from Asian continent may reach. In Okinawa Is., annual mean concentration of ozone exhibited a trend of increase from '92 to '95. The δ³⁴Snss of collected aerosol in summertime is about 2 times bigger than that of wintertime indicating that the contribution of emission source that emit heavier S compound dominate in wintertime and the inverse in summer. Long range transport of air pollutants were significantly indicated. As for dry deposition fluxes gaseous compound such as SO₂, HNO₃(g) and NH₃(g) showed a larger dry deposition amount than corresponding particulate matter.

[Key Words]

East Asia, Long Range Transport, Lead Isotope Ratio, Sulfur Isotope Ratio