Strict emission control policies implemented in New York City (NYC) and Beijing show impacts on the non-linear relationships of ozone (O3) and fine particulate matter (PM2.5) during summertime. The policies targeting sulfur dioxide and PM2.5, then volatile organic compounds and nitrogen oxides, changed PM2.5 chemical composition, resulting in an increased linear slope indicating a weaker O3 control effect than for PM2.5. Model simulations suggest regional equal percentage emission reductions for Beijing and other Chinese megacities are necessary to avoid further O3 increases.
Publisher
npj Climate and Atmospheric Science
Published On
Nov 04, 2022
Authors
Jie Zhang, Junfeng Wang, Yele Sun, Jingyi Li, Matthew Ninneman, Jianhuai Ye, Ke Li, Brian Crandall, Jingbo Mao, Weiqi Xu, Margaret J. Schwab, Weijun Li, Xinlei Ge, Mindong Chen, Qi Ying, Qi Zhang, James J. Schwab
Tags
emission control
ozone
PM2.5
New York City
Beijing
air quality
sulfur dioxide
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