Articles | Volume 23, issue 2
https://doi.org/10.5194/acp-23-1565-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-23-1565-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
27 Jan 2023
Research article |
| 27 Jan 2023
| 27 Jan 2023
Fates of secondary organic aerosols in the atmosphere identified from compound-specific dual-carbon isotope analysis of oxalic acid
Buqing Xu
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of
Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
CAS Center for Excellence in Deep Earth Science, Guangzhou 510640,
China
Jiao Tang
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of
Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
CAS Center for Excellence in Deep Earth Science, Guangzhou 510640,
China
Tiangang Tang
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of
Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
Key Laboratory of Agro-ecological Processes in Subtropical Region,
Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha,
410125, China
Shizhen Zhao
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of
Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
CAS Center for Excellence in Deep Earth Science, Guangzhou 510640,
China
Guangcai Zhong
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of
Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
CAS Center for Excellence in Deep Earth Science, Guangzhou 510640,
China
Sanyuan Zhu
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of
Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
CAS Center for Excellence in Deep Earth Science, Guangzhou 510640,
China
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of
Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
CAS Center for Excellence in Deep Earth Science, Guangzhou 510640,
China
Gan Zhang
CORRESPONDING AUTHOR
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of
Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
CAS Center for Excellence in Deep Earth Science, Guangzhou 510640,
China
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TGM concentrations and isotopic compositions in 10 Chinese cities showed strong seasonality with higher TGM concentrations and Δ199Hg and lower δ202Hg in summer. We found the seasonal variations in TGM concentrations and isotopic compositions were highly related to regional surface Hg(0) emissions, suggesting land surface Hg(0) emissions are an important source of atmospheric TGM that contribute dominantly to the seasonal variations in TGM concentrations and isotopic compositions.
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Short summary
We analyzed compound-specific dual-carbon isotope signatures (Δ14C and δ13C) of dominant secondary organic aerosol (SOA) tracer molecules (i.e., oxalic acid) to investigate the fates of SOAs in the atmosphere at five emission hotspots in China. The results indicated that SOA carbon sources and chemical processes producing SOAs vary spatially and seasonally, and these variations need to be included in Chinese climate projection models and air quality management practices.
We analyzed compound-specific dual-carbon isotope signatures (Δ14C and δ13C) of dominant...
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