Air Pollutant Variations Observed at Deokjeok Island in the Yellow Sea During April 1999 to June 2000

1999년 4월부터 2000년 6월까지 황해 덕적도에서 관찰된 대기오염물질 변화 특성

  • 김영성 (한국과학기술연구원 대기자원연구센터) ;
  • 이승복 (한국과학기술연구원 대기자원연구센터) ;
  • 김진영 (한국과학기술연구원 대기자원연구센터) ;
  • 배귀남 (한국과학기술연구원 대기자원연구센터) ;
  • 문길주 (한국과학기술연구원 대기자원연구센터) ;
  • 원재광 (서울대학교 지구환경과학부) ;
  • 윤순창 (서울대학교 지구환경과학부)
  • Published : 2003.08.01

Abstract

Sulfur dioxide (SO$_2$), ozone, total suspended particulates (TSP) and PM$_{2.5}$ were measured at Deokjeok Island in the Yellow Sea during April 1999 to June 2000. Although the emission amount of air pollutants is quite low in this small island of 36 km$^2$ with 1.4 thousand inhabitants, there are pollutant sources such as an oil -firing power plant and a wharf for ferryboat. The island is also influenced from the emissions from the greater Seoul area in the east and from China in the west. In order to characterize the pollutant variations due to interactions between transport and local emissions. the correlation between variations of SO$_2$ and ozone was investigated. Mass and ion concentrations of TSP and PM$_{2.5}$ were examined on selected episode days of positive and negative correlations between the two gaseous species in spring and winter. The effects of transport were pronounced on the days of positive correlation in spring with higher concentrations of ozone and PM$_{2.5}$. TSP concentrations were also high on these days because of high wind speeds. On the days of negative correlation in spring, frequent fog associated with low wind speeds facilitated SO$_2$ oxidation and increased sulfate accompanied with decrease in nitrate in PM$_{2.5}$ and chloride in TSP. This latter phenomena was noticeable since it showed that chemical composition of fine particles could be significantly altered not only during the transport but also by local environment.ronment.

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