Abstract

Peroxyacetyl nitrate (PAN) is an important photochemical product and affects ozone (O3) formation in the troposphere. Yet, the long-term observation of PAN remains scarce, limiting the full understanding of its impacts on photochemical pollution. Here, we observed PAN from 2018 to 2022 in urban Fuzhou, Southeastern China. We found that, in contrast to upward trend of O3, PAN concentrations shown a significant decreasing trend at an average rate of −0.07 ppb/year. NO2, CO, UVB, and T contributed to the decreasing trend of PAN according to Machine learning analyses, while the effect of O3-represented atmospheric oxidation capacity on PAN was fluctuating from year to year. Chemical box model revealed active PA production and depletion in Fuzhou. Thus, despite the decreasing PAN concentration, PAN chemistry effectively promoted O3 formation by rising ROx levels, leading to increases of 2.18%–58.4% in net O3 production rate in different years. Our results provide valuable insights into the evolution of photochemical pollution in urban environments.

Details

Title
Trends of peroxyacetyl nitrate and its impact on ozone over 2018–2022 in urban atmosphere
Author
Lin, Ziyi 1 ; Xu, Lingling 2 ; Yang, Chen 1 ; Chen, Gaojie 1 ; Ji, Xiaoting 1 ; Li, Lingjun 1 ; Zhang, Keran 3 ; Hong, Youwei 2   VIAFID ORCID Logo  ; Li, Mengren 2 ; Fan, Xiaolong 2 ; Hu, Baoye 4 ; Zhang, Fuwang 5 ; Chen, Jinsheng 2 

1  Chinese Academy of Sciences, Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Xiamen, China (GRID:grid.9227.e) (ISNI:0000000119573309); Chinese Academy of Sciences, Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention, Institute of Urban Environment, Xiamen, China (GRID:grid.9227.e) (ISNI:0000000119573309); University of Chinese Academy of Sciences, Beijing, China (GRID:grid.410726.6) (ISNI:0000 0004 1797 8419) 
2  Chinese Academy of Sciences, Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Xiamen, China (GRID:grid.9227.e) (ISNI:0000000119573309); Chinese Academy of Sciences, Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention, Institute of Urban Environment, Xiamen, China (GRID:grid.9227.e) (ISNI:0000000119573309) 
3  Chinese Academy of Sciences, Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Xiamen, China (GRID:grid.9227.e) (ISNI:0000000119573309); Chinese Academy of Sciences, Fujian Key Laboratory of Atmospheric Ozone Pollution Prevention, Institute of Urban Environment, Xiamen, China (GRID:grid.9227.e) (ISNI:0000000119573309); Fujian Agriculture and Forest University, Fuzhou, China (GRID:grid.256111.0) (ISNI:0000 0004 1760 2876) 
4  Minnan Normal University, Zhangzhou, China (GRID:grid.413066.6) (ISNI:0000 0000 9868 296X) 
5  Environmental Monitoring Center of Fujian, Fuzhou, China (GRID:grid.413066.6) 
Pages
192
Publication year
2024
Publication date
2024
Publisher
Nature Publishing Group
e-ISSN
23973722
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41612-024-00746-7
ProQuest document ID
3095827672
Copyright
© The Author(s) 2024. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.