Articles | Volume 17, issue 5
https://doi.org/10.5194/acp-17-3385-2017
https://doi.org/10.5194/acp-17-3385-2017
Research article
 | 
09 Mar 2017
Research article |  | 09 Mar 2017

Interpreting the 13C  ∕ 12C ratio of carbon dioxide in an urban airshed in the Yangtze River Delta, China

Jiaping Xu, Xuhui Lee, Wei Xiao, Chang Cao, Shoudong Liu, Xuefa Wen, Jingzheng Xu, Zhen Zhang, and Jiayu Zhao

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Latest update: 28 Mar 2024
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Short summary
The Yangtze River Delta is one of the most industrialized regions in China. In situ optical isotopic measurement in Nanjing, a city located in the Delta, showed unusually high atmospheric δ13C signals in the summer (−7.44 ‰, July 2013 mean), which we attributed to the influence of cement production in the region. Flux partitioning calculations revealed that natural ecosystems in the region were a negligibly small source of atmospheric CO2.
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