On the seasonality of long-range transport of acidic pollutants in East Asia

Chung Te Chang, Lixin Wang, Lih Jih Wang, Chiung Pin Liu, Ci Jian Yang, Jr Chuan Huang, Chiao Ping Wang, Neng Huei Lin, Teng Chiu Lin*

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

摘要

East Asia currently has the largest SO2 and NO x emissions in the world. The long-range transport (LRT) of acidic pollutants in this region is of great concern but the extent is not well understood. Here results from combined long-term (⩾20 years) atmospheric deposition monitoring and air trajectory analysis in East Asia were reported. The results showed that despite the large decrease of SO2 and NO x emissions in Taiwan, annual deposition of non-sea-salt sulfate (nss- SO 4 2 − ) in northern Taiwan showed no decreasing trend during 1994-2020. However, when divided seasonally, both nss- SO 4 2 − and nitrate ( NO 3 − ) deposition had a significant decreasing trend in the summer but not in the winter. Similar patterns were found for Japan and Korea. Air trajectory models in combination with a regional emission map indicate that LRT from eastern China contributed up to 70% of the winter deposition of nss- SO 4 2 − and NO 3 − in Taiwan and up to 50% in Japan and Korea. The results indicate that LRT obscured the efficacy of local pollution control measures in East Asia and suggest that transboundary air pollution regulations are required to combat acid deposition.

原文英語
文章編號094029
期刊Environmental Research Letters
17
發行號9
DOIs
出版狀態已發佈 - 2022 9月 1

ASJC Scopus subject areas

  • 可再生能源、永續發展與環境
  • 環境科學 (全部)
  • 公共衛生、環境和職業健康

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