The DOI matches its Crossref record; 55 of the 55 references it cites were found in a registry or an index.
Effects of Aqueous-Phase and Photochemical Processing on Secondary Organic Aerosol Formation and Evolution in Beijing, China
Abstract
Secondary organic aerosol (SOA) constitutes a large fraction of OA, yet remains a source of significant uncertainties in climate models due to incomplete understanding of its formation mechanisms and evolutionary processes. Here we evaluated the effects of photochemical and aqueous-phase processing on SOA composition and oxidation degrees in three seasons in Beijing, China, using high-resolution aerosol mass spectrometer measurements along with positive matrix factorization. Our results show that aqueous-phase processing has a dominant impact on the formation of more oxidized SOA (MO–OOA), and the contribution of MO–OOA to OA increases substantially as a function of relative humidity or liquid water content. In contrast, photochemical processing plays a major role in the formation of less oxidized SOA (LO–OOA), as indicated by the strong correlations between LO–OOA and odd oxygen (O x = O 3 + NO 2 ) during periods of photochemical production (R 2 = 0.59–0.80). Higher oxygen-to-carbon ratios of SOA during periods with higher RH were also found indicating a major role of aqueous-phase processing in changing the oxidation degree of SOA in Beijing. Episodes analyses further highlight that LO–OOA plays a more important role during the early stage of the formation of autumn/winter haze episodes while MO–OOA is more significant during the later evolution period.
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Severe haze in northern China: A synergy of anthropogenic emissions and atmospheric processes
An, Z., Huang, R.-J., Zhang, R., Tie, X., Li, G., Cao, J., Zhou, W., Shi, Z., Han, Y., Gu, Z., et al. (2019) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1900125116 · Cited by 1,015
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Metadata
- Authors
- Xu, W., Han, T., Du, W., Wang, Q., Chen, C., Zhao, J., Zhang, Y., Li, J., Fu, P., Wang, Z., Worsnop, D. R., & Sun, Y.
- Venue
- Environmental Science & Technology
- Publisher
- American Chemical Society (ACS)
- Published
- 2017-01-06
- Volume
- 51
- Issue
- 2
- Pages
- 762-770
- ISSN
- 0013-936X (ISSN-L)
- 1520-5851
- OpenAlex
- W2567098959
- Cited by
- 317
- References
- 55
- FWCI
- 9.66
- Type
- journal article
- Language
- en
- Open access
- closed
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