A Study on the Seasonal Correlation between O3 and PM2.5 in Seoul in 2017

Ha Kyung Lee; Eun Lak Choi; Hyun Ji Lee; Su Young Lee; Ji Yi Lee

doi:10.5572/KOSAE.2020.36.4.533

A Study on the Seasonal Correlation between O₃ and PM_2.5 in Seoul in 2017

Ha Kyung Lee, Eun Lak Choi, Hyun Ji Lee, Su Young Lee, Ji Yi Lee

Department of Environmental Science & Engineering

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Abstract To characterize the correlation between tropospheric O₃ and PM_2.5 by season, a comprehensive analysis for the interaction between tropospheric O₃ and PM_2.5 has been performed over 25 sites in Seoul in 2017. Highly positive correlation between O₃ and PM_2.5 was observed during the summer period (June, July, and August) and this is related to the simultaneous formation of O₃ and PM_2.5 due to an increase of the atmospheric oxidation ability. While, correlations of O₃ and PM_2.5 were negative in the winter period (January, February, and December), showing the opposite trend with summer. The negative correlation for O₃ and PM_2.5 in winter might be due to both aerosol-radiation interactions and the O₃ titration effect by NO_x. We also found that NO_x plays a more significant role to decrease O₃ concentration than PM_2.5 on a low concentration of O₃ in winter. It indicates that there are seasonal difference for the mechanisms of O₃ and PM_2.5 interaction. Therefore, it is required on a diferent O₃ and PM_2.5 reduction approach for each season.

Original language	English
Pages (from-to)	533-542
Number of pages	10
Journal	Journal of Korean Society for Atmospheric Environment
Volume	36
Issue number	4
DOIs	https://doi.org/10.5572/KOSAE.2020.36.4.533
State	Published - 2020

Bibliographical note

Publisher Copyright:
© 2020

Keywords

Aerosol radiation interactions
Air pollution of Seoul
NO titration effect
O
PM

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10.5572/KOSAE.2020.36.4.533

Cite this

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title = "A Study on the Seasonal Correlation between O3 and PM2.5 in Seoul in 2017",

abstract = "Abstract To characterize the correlation between tropospheric O3 and PM2.5 by season, a comprehensive analysis for the interaction between tropospheric O3 and PM2.5 has been performed over 25 sites in Seoul in 2017. Highly positive correlation between O3 and PM2.5 was observed during the summer period (June, July, and August) and this is related to the simultaneous formation of O3 and PM2.5 due to an increase of the atmospheric oxidation ability. While, correlations of O3 and PM2.5 were negative in the winter period (January, February, and December), showing the opposite trend with summer. The negative correlation for O3 and PM2.5 in winter might be due to both aerosol-radiation interactions and the O3 titration effect by NOx. We also found that NOx plays a more significant role to decrease O3 concentration than PM2.5 on a low concentration of O3 in winter. It indicates that there are seasonal difference for the mechanisms of O3 and PM2.5 interaction. Therefore, it is required on a diferent O3 and PM2.5 reduction approach for each season.",

keywords = "Aerosol radiation interactions, Air pollution of Seoul, NO titration effect, O, PM",

author = "Lee, {Ha Kyung} and Choi, {Eun Lak} and Lee, {Hyun Ji} and Lee, {Su Young} and Lee, {Ji Yi}",

note = "Publisher Copyright: {\textcopyright} 2020",

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doi = "10.5572/KOSAE.2020.36.4.533",

language = "English",

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T1 - A Study on the Seasonal Correlation between O3 and PM2.5 in Seoul in 2017

AU - Lee, Ha Kyung

AU - Choi, Eun Lak

AU - Lee, Hyun Ji

AU - Lee, Su Young

AU - Lee, Ji Yi

PY - 2020

Y1 - 2020

N2 - Abstract To characterize the correlation between tropospheric O3 and PM2.5 by season, a comprehensive analysis for the interaction between tropospheric O3 and PM2.5 has been performed over 25 sites in Seoul in 2017. Highly positive correlation between O3 and PM2.5 was observed during the summer period (June, July, and August) and this is related to the simultaneous formation of O3 and PM2.5 due to an increase of the atmospheric oxidation ability. While, correlations of O3 and PM2.5 were negative in the winter period (January, February, and December), showing the opposite trend with summer. The negative correlation for O3 and PM2.5 in winter might be due to both aerosol-radiation interactions and the O3 titration effect by NOx. We also found that NOx plays a more significant role to decrease O3 concentration than PM2.5 on a low concentration of O3 in winter. It indicates that there are seasonal difference for the mechanisms of O3 and PM2.5 interaction. Therefore, it is required on a diferent O3 and PM2.5 reduction approach for each season.

AB - Abstract To characterize the correlation between tropospheric O3 and PM2.5 by season, a comprehensive analysis for the interaction between tropospheric O3 and PM2.5 has been performed over 25 sites in Seoul in 2017. Highly positive correlation between O3 and PM2.5 was observed during the summer period (June, July, and August) and this is related to the simultaneous formation of O3 and PM2.5 due to an increase of the atmospheric oxidation ability. While, correlations of O3 and PM2.5 were negative in the winter period (January, February, and December), showing the opposite trend with summer. The negative correlation for O3 and PM2.5 in winter might be due to both aerosol-radiation interactions and the O3 titration effect by NOx. We also found that NOx plays a more significant role to decrease O3 concentration than PM2.5 on a low concentration of O3 in winter. It indicates that there are seasonal difference for the mechanisms of O3 and PM2.5 interaction. Therefore, it is required on a diferent O3 and PM2.5 reduction approach for each season.

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