検索画面に戻る Go Research

	(278Kb)

[C-1.2.1 Development of Analysis Systems of High Sensitivity for Oxidative Species and Analysis of Transport and Reactions of Atmospheric Pollutants]

[Contact Person]

Shiro Hatakeyama
Senior Research Scientist, Acid Deposition Research Team
Global Environment Division, National Institute for Environmental Studies
Environmental Agency
16-2, Onogawa, Tsukuba, Ibaraki 305 Japan
Phone:+81-298-51-6111(Ext.437), Fax:+81-298-51-4732

[Total Budget for FY1990-1992]

81,512,000 Yen

[Abstract]

　Aircraft observations of atmospheric pollutants were performed over East China Sea, Yellow Sea, and Sea of Japan in October, 1991 and November, 1992. Ground based observations were also performed at Oki Island and Happo-one. In '91 mission difference between marine atmosphere and continental atmosphere was clearly seen around Japan. In '92 mission distribution of SO₂ showed interesting feature. High concentration of SO₂ up to 10 ppbv was observed over Sea of Japan at 1,500 and 4,500 feet, when wind blew from west or north west The concentration decreased when the aircraft approached to Honshu. NOx also showed similar distribution. All the data strongly suggest the transport of pollutants from the Asian continent.
　A new analysis system (HPLC with a fluorometric detector) and a new sample collection technique (mist chamber) were introduced. Sensitivity of the analysis of hydroperoxides became more than 10 times higher, and the sample-collection time was reduced to less than 1/3 of former method. The yields of peroxides were obtained and reaction mechanisms were clarified.

[Key Words]

IGAC, Aircraft Observation, High SO₂, Peroxides