光化学オキシダントの移流と被害 : 一事例の解析

概要

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On July 8, 1976 a junior high school at Tsurukawa, Machida, Tokyo was attacked by photochemical pollutant with 13 pupils injuried. Wind directions, wind speeds and oxidant concentrations at many monitoring sites around the school were investigated. It has been concluded that the injury was brought about by photochemical pollutant transported by a SSW sea breeze from Sagami Bay about 30km from the school. The oxidant concentration rised steadily in passing a 14km distance in the order of Atsuki site (0.12ppm), Sagamidai site (0.15ppm) and Machida site (0.23 ppm), all locating along a straight line of the SSW direction; the school locates farther 5km SSW downwind from the Machida site. The rise in oxidant concentration has been tentatively ascribed to the automotive exhaust gas from Tomei High Speed Road and also possibly to the hydrocarbon emission from stationary sources, both lying upwind of Machida.
横浜国立大学環境科学研究センターの論文