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Discussion papers
https://doi.org/10.5194/acp-2019-175
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2019-175
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 20 Mar 2019

Submitted as: research article | 20 Mar 2019

Review status
This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Atmospheric Chemistry and Physics (ACP) and is expected to appear here in due course.

Air quality and acid deposition impacts of local emissions and transboundary air pollution in Japan and South Korea

Steve Hung Lam Yim1,2, Yefu Gu1, Matthew Shapiro3, and Brent Stephens4 Steve Hung Lam Yim et al.
  • 1Department of Geography and Resource Management, The Chinese University of Hong Kong, Sha Tin, N.T., Hong Kong, China
  • 2Stanley Ho Big Data Decision Analytics Research Centre, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
  • 3Department of Social Sciences, Illinois Institute of Technology, Chicago, IL, USA
  • 4Department of Civil, Architectural, and Environmental Engineering, Illinois Institute of Technology, Chicago, IL, USA

Abstract. Recent studies have reported that air pollution causes adverse impacts on the environment and human health. Previous studies have intensively investigated the transboundary air pollution (TAP) impact in East Asia in episode events. From the environmental perspectives, it is necessary to better understand the spatiotemporal variations in TAP and the resultant impact on the environment. This study is aimed at assessing and quantifying the air quality impacts in Japan and South Korea due to their local emissions and TAP in East Asia–one of the polluted regions. We have applied state-of-the-science atmospheric models to simulate air quality in East Asia, and then analyzing the air quality and acid deposition impacts of local emissions and TAP in Japan and South Korea. Our results show that ~30 % of annual ambient PM2.5 in 2010 was on average contributed by local emissions in Japan and South Korea, while the remaining was contributed by TAP from other countries in the region. More detailed analyses also revealed minimal seasonal variation in surface PM2.5 in Japan, whereas there was a relatively large variation in South Korea in the winter. Further, among all five studied anthropogenic emission sectors of China, the industrial sector represented the greatest contributor to annual surface PM2.5 concentrations in Japan and South Korea, followed by the residential and power generation sectors. In terms of acid deposition, our results show that TAP’s impact on acid deposition (SO42− and NO3) was larger than TAP’s impact on PM2.5 concentration, and that seasonal variations were similar for both Japan and South Korea: higher in both the winter and summer. Finally, wet deposition had a greater impact on mixed forests in Japan and savannas in South Korea. Given these significant impacts of TAP in the region, it is paramount that cross-national efforts be taken to mitigate air pollution problems in across East Asia.

Steve Hung Lam Yim et al.
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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Steve Hung Lam Yim et al.
Steve Hung Lam Yim et al.
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Short summary
This study assessed and quantified the transboundary air pollution (TAP) impact in Japan and South Korea. We found that ~70 % of annual ambient PM2.5 in Japan and South Korea was contributed by other countries in the region, and wet deposition had a greater impact on mixed forests in Japan and savannas in South Korea. Given these significant impacts of TAP in the region, it is paramount that cross-national efforts be taken to mitigate air pollution problems in across East Asia.
This study assessed and quantified the transboundary air pollution (TAP) impact in Japan and...
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