종관기상장에 따른 서울 지역 미세먼지 농도 변화

Abstract

To evaluate dominant synoptic classes which affect on PM10 concentration in Seoul, 64synoptic classes are classified from four seasons, 850hPa geopotential wind and lower levelstability Index. In this study, we used air monitoring and meteorological data in Seoul for fiveyears from 2001 to 2005.The results indicate that the highest occurrence frequency of synoptic class is under a strongwesterly geopotential wind and stable lower atmosphere in spring. The highest PM10concentration of synoptic class is associated with a weak geopotential wind speed and highlower level stability. In that class, not only PM10 but SO2, NO2 and CO concentrations are alsohigher than other classes. The analysis of spacial distribution of PM10 concentration in each classare indicate that the influence of synoptic class are similar in the Metropolitan area in Korea. ButPM10 concentration in some areas in Kyoung-Gi are more higher than in Seoul. The relationshipbetween PM10 concentration and Meteorological indicator (relative humidity, temperature,surface wind speed) under same synoptic class is more correlative in Winter than other season.