이어도 해양과학기지의 오존농도의 계절변화와 일변화 특징

Abstract

We examined diurnal and seasonal variations of ozone (O3parameters observed at the Ieodo Ocean Research Station(32.07N, 125.10E, 36 m above sea level) during June2003 and May 2005. Over the 2-year period, the mean ozone concentration was 49.5± 15.5 ppbv. Ozone concen-trations show great variability with a monthly mean up to 68.2 ppbv in May 2005 and seasonal variations with~ 4 ppbv with a maximum at 3~ 4 p.m. and minimum at 7~ 8 a.m. HYSPLIT backward air trajectory indicatedthat the air masses with higher ozone came from the north or northwest and those with lower ozone arrived mainlyvia southerly or southeasterly. Ozone distributions at Ieodo Ocean Research Station were observed to be signi-cantly impacted by long-range transport and regional scale air circulation.