Articles | Volume 19, issue 24
https://doi.org/10.5194/acp-19-15609-2019
https://doi.org/10.5194/acp-19-15609-2019
Research article
 | 
20 Dec 2019
Research article |  | 20 Dec 2019

Sources and formation of carbonaceous aerosols in Xi'an, China: primary emissions and secondary formation constrained by radiocarbon

Haiyan Ni, Ru-Jin Huang, Junji Cao, Jie Guo, Haoyue Deng, and Ulrike Dusek

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Short summary
We present a 1-year source apportionment record of carbonaceous aerosols in Xi'an, China. Biomass burning strongly increases in winter, while seasonal changes of coal and liquid fossil fuel combustion are moderate. We find strong evidence for fossil secondary OC formation during the warm period that is further enhanced in stagnant, polluted conditions due to longer atmospheric residence times. At the same time we find that water-insoluble (primary) fossil is lost due to photochemical processing.
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