Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Characteristic of PM10 Distribution Related to Precise Local Wind Patterns in Busan Metropolitan Area

상세 국지 기류 분포를 고려한 부산 지역 내 미세 먼지 분포 특성

  • Hong, Seon-Hwa (Department of Earth Science Education, Pusan National University) ;
  • Lee, Soon-Hwan (Department of Earth Science Education, Pusan National University)
  • 홍선화 (부산대학교 지구과학교육과) ;
  • 이순환 (부산대학교 지구과학교육과)
  • Received : 2017.12.11
  • Accepted : 2017.12.19
  • Published : 2017.12.31
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Abstract

In order to investigate the $PM_{10}$ concentration trend and its characteristics over five different sub area in Busan from 2013 to 2015, data analysis with considering air flow distribution according to its topography was carried out using statistical methodology. The annual mean concentrations of $PM_{10}$ in Busan tend to decrease from $49.6{\mu}g/m^3$ in 2013 to $46.9{\mu}g/m^3$ in 2015. The monthly mean concentrations value of $PM_{10}$ were high during spring season, from March to May, and low during summer and fall due to frequent rain events. The concentration of $PM_{10}$ was the highest in five different sub-area in Busan. High concentration episodes over 90 percentile of daily $PM_{10}$ concentration were strongly associated with mean daily wind speed, and often occurred when the westerly wind or southwesterly wind were dominant. Regardless of wind direction, the highest correlation of $PM_{10}$ concentrations was observed between eastern and southern regions, which were geographically close to each other, and the lowest in the western and eastern regions blocked by mountains. Wind flow along the complex terrain in Busan is also one of the predominant factors to understand the temporal variation of $PM_{10}$ concentrations.

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References

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