Author(s)

H. Akimoto, P. Pochanart, J. Hirokawa and Y. Kajii

Abstract

Seasonal Variation of Surface Ozone at Remote Sites in Northeast Asia: Comparison with European Data Guest contribution H. Akimoto, P. Pochanart, J. Hirokawa and Y Kajii Research Center forAdvancedScience andTechnology, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153, Japan In order to understand the mechanism of transport and transformation of ozone over the Eurasian continent, measurements of surface 63 have been conducted at several remote sites in Northeast Asia, i.e. Old, Okinawa, and Happo in Japan, and Mondy in Russia. Variation of Og concentration at each site has been classified by day-by-day trajectory calculations for a whole year, and seasonal variation of Og in each air mass category has been elucidated. The seasonal variation of "regionally polluted" continental air mass and clean Eurasian "background" air mass thus obtained at Oki as well as other

Keywords