Long-term Trend of PM2.5 Concentration in Seoul

Min Ju Yeo, Yun Seok Im, Seung Sung Yoo, Eun Mi Jeon, Yong Pyo Kim

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Public's anxiety on ambient PM2.5 level is increasing. To check whether the anxiety is related the PM2.5 concentration, the long-trem trends of (1) the PM2.5 concentration, high PM2.5 concentration frequency fraction, frequency of the high concentration occurrence duration time (three indicators), (2) PM2.5/PM10, (3) PM2.5/PM10 when PM2.5≥50 μg/m3 and <10 μg/m3 in Seoul between 2003 and 2018 are studied. Generally, all three indicators have decreased. For example, the annual mean PM2.5 concentration decreased from 37 μg/m3 in 2003 to 23 μg/m3 in 2018 in Seoul. However, the frequency fraction of PM2.5 exceeding 75 μg/m3 has increased since 2016. The frequency of the occurrence duration time of PM2.5≥50 μg/m3 has increased also since 2015. The PM2.5/PM10 increased while the concetnrations of PMs, because the PM10 concentration decreased more than PM2.5 concentration in Seoul between 2003 and 2018. The PM2.5/PM10 when PM2.5≥50 μg/m3 and <10 μg/m3 are also increased in Seoul between 2003 and 2018 and has incrased rapidly since 2014 when PM2.5≥50

Original languageEnglish
Pages (from-to)438-450
Number of pages13
JournalJournal of Korean Society for Atmospheric Environment
Volume35
Issue number4
DOIs
StatePublished - Aug 2019

Bibliographical note

Publisher Copyright:
© 2019, Journal of Korean Society for Atmospheric Environment.All Rights Reserved.

Keywords

  • Frequency by PM concentration interval
  • High concentration occurrence duration
  • PM concentration
  • Regional difference

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