Long-range transport of air pollutants originating in China: A possible major cause of multi-day high-PM10 episodes during cold season in Seoul, Korea

Hye Ryun Oh, Chang Hoi Ho, Jinwon Kim, Deliang Chen, Seungmin Lee, Yong Sang Choi, Lim Seok Chang, Chang Keun Song

Research output: Contribution to journalArticlepeer-review

105 Scopus citations

Abstract

Massive air pollutants originating in China and their trans-boundary transports are an international concern in East Asia. Despite its importance, details in the trans-boundary transport of air pollutants over East Asia and its impact on regional air quality remain to be clarified. This study presents an evidence which strong support that aerosols emitting in China play a major role in the occurrence of multi-day (≥4 days) severe air pollution episodes in cold seasons (October through March) for 2001-2013 in Seoul, Korea, where the concentration of PM10 (particulates with diameters≤10μm) exceeds 100μgm-3. Observations show that these multi-day severe air pollution episodes occur when a strong high-pressure system resides over the eastern China-Korea region. In such weather conditions, air pollutants emitted in eastern China/southwestern Manchuria are trapped within the atmospheric boundary layer, and gradually spread into neighboring countries by weak lower tropospheric westerlies. Understanding of trans-boundary transports of air pollutants will advance the predictability of local air quality, and will encourage the development of international measures to improve air quality.

Original languageEnglish
Pages (from-to)23-30
Number of pages8
JournalAtmospheric Environment
Volume109
DOIs
StatePublished - 1 May 2015

Keywords

  • China
  • Long-lasting
  • PM episode
  • Seoul
  • Trans-boundary transport

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