Interpreting the C-13 / C-12 ratio of carbon dioxide in an urban airshed in the Yangtze River Delta, China
Xu, JP; Lee, XH; Xiao, W; Cao, C; Liu, SD; Wen, XF; Xu, JZ; Zhang, Z; Zhao, JY
2017
Source PublicationATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
Volume17Issue:5Pages:3385-3399
AbstractObservations of atmospheric CO2 mole fraction and the C-13 / C-12 ratio (expressed as delta C-13) in urban airsheds provide constraints on the roles of anthropogenic and natural sources and sinks in local and regional carbon cycles. In this study, we report observations of these quantities in Nanjing at hourly intervals from March 2013 to August 2015, using a laser-based optical instrument. Nanjing is the second largest city located in the highly industrialized Yangtze River Delta (YRD), eastern China. The mean CO2 mole fraction and delta C-13 were (439.7 +/- 7.5) mu mol mol 1 and (8.48 +/- 0.56)% over this observational period. The peak monthly mean delta C-13 (-7.44 %, July 2013) was 0.74% higher than that observed at Mount Waliguan, a WMO (World Meteorological Organization) baseline site on the Tibetan Plateau and upwind of the YRD region. The highly C-13-enriched signal was partly attributed to the influence of cement production in the region. By applying the Miller-Tans method to nighttime and daytime observations to represent signals from the city of Nanjing and the YRD, respectively, we showed that the C-13 / C-12 ratio of CO2 sources in the Nanjing municipality was (0.21 +/- 0.53)% lower than that in the YRD. Flux partitioning calculations revealed that natural ecosystems in the YRD were a negligibly small source of atmospheric CO2.
SubtypeJournal
Subject AreaMeteorology & Atmospheric Sciences
WOS Subject ExtendedMeteorology & Atmospheric Sciences
WOS KeywordFOSSIL-FUEL EMISSIONS ; SUB-ALPINE FOREST ; ATMOSPHERIC CO2 ; ISOTOPIC COMPOSITION ; STABLE-ISOTOPES ; WATER-VAPOR ; MIXING-RATIO ; MASS-BALANCE ; ECOSYSTEM ; EXCHANGE
Indexed BySCI
Language英语
WOS IDWOS:000397795000001
PublisherCOPERNICUS GESELLSCHAFT MBH
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Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44087
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Xu, JP,Lee, XH,Xiao, W,et al. Interpreting the C-13 / C-12 ratio of carbon dioxide in an urban airshed in the Yangtze River Delta, China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2017,17(5):3385-3399.
APA Xu, JP.,Lee, XH.,Xiao, W.,Cao, C.,Liu, SD.,...&Zhao, JY.(2017).Interpreting the C-13 / C-12 ratio of carbon dioxide in an urban airshed in the Yangtze River Delta, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,17(5),3385-3399.
MLA Xu, JP,et al."Interpreting the C-13 / C-12 ratio of carbon dioxide in an urban airshed in the Yangtze River Delta, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 17.5(2017):3385-3399.
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