Zhang, Yuxian; Cao, Fang; Song, Wenhuai; Jia, Xiao-Fang; Xie, Tian; Wu, Chang-Liu; Yan, Peng; Yu, Mingyuan; Rauber, Martin; Salazar, Gary; Szidat, Sönke; Zhang, Yanlin (2024). Fossil and Nonfossil Sources of Winter Organic Aerosols in the Regional Background Atmosphere of China. Environmental science & technology, 58(2), pp. 1244-1254. American Chemical Society 10.1021/acs.est.3c08491
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zhang-et-al-2024-fossil-and-nonfossil-sources-of-winter-organic-aerosols-in-the-regional-background-atmosphere-of-china.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (5MB) |
Carbonaceous aerosols (CA) from anthropogenic emissions have been significantly reduced in urban China in recent years. However, the relative contributions of fossil and nonfossil sources to CA in rural and background regions of China remain unclear. In this study, the sources of different carbonaceous fractions in fine aerosols (PM2.5) from five background sites of the China Meteorological Administration Atmosphere Watch Network during the winter of 2019 and 2020 were quantified using radiocarbon (14C) and organic markers. The results showed that nonfossil sources contributed 44-69% to total carbon at these five background sites. Fossil fuel combustion was the predominant source of elemental carbon at all sites (73 ± 12%). Nonfossil sources dominated organic carbon (OC) in these background regions (61 ± 13%), with biomass burning or biogenic-derived secondary organic carbon (SOC) as the most important contributors. However, the relative fossil fuel source to OC in China (39 ± 13%) still exceeds those at other regional/background sites in Asia, Europe, and the USA. SOC dominated the fossil fuel-derived OC, highlighting the impact of regional transport from anthropogenic sources on background aerosol levels. It is therefore imperative to develop and implement aerosol reduction policies and technologies tailored to both the anthropogenic and biogenic emissions to mitigate the environmental and health risks of aerosol pollution across China.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
10 Strategic Research Centers > Oeschger Centre for Climate Change Research (OCCR) 08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP) |
UniBE Contributor: |
Song, Wenhuai, Rauber, Martin, Salazar Quintero, Gary Abdiel, Szidat, Sönke |
Subjects: |
500 Science > 540 Chemistry |
ISSN: |
1520-5851 |
Publisher: |
American Chemical Society |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
08 Jan 2024 10:22 |
Last Modified: |
28 Mar 2024 06:25 |
Publisher DOI: |
10.1021/acs.est.3c08491 |
PubMed ID: |
38178789 |
Uncontrolled Keywords: |
background biomass burning carbonaceous aerosols fossil fuel nonfossil sources radiocarbon (14C) secondary organic carbon (SOC) source apportionment |
BORIS DOI: |
10.48350/191300 |
URI: |
https://boris.unibe.ch/id/eprint/191300 |
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