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- W4293716055 abstract "Abstract Incomplete understanding of the sources of secondary organic aerosol (SOA) leads to large uncertainty in both air quality management and in climate change assessment. Chemical reactions occurring in the atmospheric aqueous phase represent an important source of SOA mass, yet, the effects of anthropogenic emissions on the aqueous SOA (aqSOA) are not well constrained. Here we use compound-specific dual-carbon isotopic fingerprints (δ 13 C and Δ 14 C) of dominant aqSOA molecules, such as oxalic acid, to track the precursor sources and formation mechanisms of aqSOA. Substantial stable carbon isotope fractionation of aqSOA molecules provides robust evidence for extensive aqueous-phase processing. Contrary to the paradigm that these aqSOA compounds are largely biogenic, radiocarbon-based source apportionments show that fossil precursors produced over one-half of the aqSOA molecules. Large fractions of fossil-derived aqSOA contribute substantially to the total water-soluble organic aerosol load and hence impact projections of both air quality and anthropogenic radiative forcing. Our findings reveal the importance of fossil emissions for aqSOA with effects on climate and air quality." @default.
- W4293716055 created "2022-08-31" @default.
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- W4293716055 date "2022-08-31" @default.
- W4293716055 modified "2023-10-18" @default.
- W4293716055 title "Large contribution of fossil-derived components to aqueous secondary organic aerosols in China" @default.
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- W4293716055 doi "https://doi.org/10.1038/s41467-022-32863-3" @default.
- W4293716055 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36045131" @default.
- W4293716055 hasPublicationYear "2022" @default.
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