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Delta(CO2)-C-14 from dark respiration in plants and its impact on the estimation of atmospheric fossil fuel CO2
Xiong, Xiaohu1,2,3; Zhou, Weijian1,2; Cheng, Peng1,2; Wu, Shugang1,2; Niu, Zhenchuan1,2; Du, Hua1,2; Lu, Xuefeng1,2; Fu, Yunchong1,2; Burr, George S.1,2
2017-04-01
发表期刊JOURNAL OF ENVIRONMENTAL RADIOACTIVITY
卷号169期号:2017页码:79-84
文章类型Article
摘要Radiocarbon (C-14) has been widely used for quantification of fossil fuel CO2 (CO2ff) in the atmosphere and for ecosystem source partitioning studies. The strength of the technique lies in the intrinsic differences between the C-14 signature of fossil fuels and other sources. In past studies, the C-14 content of CO2 derived from plants has been equated with the C-14 content of the atmosphere. Carbon isotopic fractionation mechanisms vary among plants however, and experimental study on fractionation associated with dark respiration is lacking. Here we present accelerator mass spectrometry (AMS) radiocarbon results of CO2 respired from 21 plants using a lab-incubation method and associated bulk organic matter. From the respired CO2 we determine Delta C-14(res) values, and from the bulk organic matter we determine-Delta C-14(born) values. A significant difference between Delta C-14(res) and Delta C-14(bom) (P < 0.01) was observed for all investigated plants, ranging from -42.3 parts per thousand to 10.1 parts per thousand. The results show that Delta C-14(res) values are in agreement with mean atmospheric Delta(CO2)-C-14 for several days leading up to the sampling date, but are significantly different from corresponding bulk organic Delta C-14 values. We find that although dark respiration is unlikely to significantly influence the estimation of CO2ff, an additional bias associated with the respiration rate during a plant's growth period should be considered when using Delta C-14 in plants to quantify atmospheric CO2. (C) 2017 Elsevier Ltd. All rights reserved.
关键词Delta C-14 Plant Dark Respiration Fossil Fuel Co2 Carbon Cycle
WOS标题词Science & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.jenvrad.2017.01.003
关键词[WOS]CARBON-ISOTOPE COMPOSITION ; RADIOCARBON CONCENTRATION ; RESPIRED CO2 ; ANTHROPOGENIC CO2 ; SOUTHERN POLAND ; RESIDENCE TIMES ; TREE-RINGS ; SOIL CO2 ; C-14 ; FRACTIONATION
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:000398752300010
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5489
专题加速器质谱中心
作者单位1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.Xian AMS Ctr, Xian 710061, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Xiong, Xiaohu,Zhou, Weijian,Cheng, Peng,et al. Delta(CO2)-C-14 from dark respiration in plants and its impact on the estimation of atmospheric fossil fuel CO2[J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,2017,169(2017):79-84.
APA Xiong, Xiaohu.,Zhou, Weijian.,Cheng, Peng.,Wu, Shugang.,Niu, Zhenchuan.,...&Burr, George S..(2017).Delta(CO2)-C-14 from dark respiration in plants and its impact on the estimation of atmospheric fossil fuel CO2.JOURNAL OF ENVIRONMENTAL RADIOACTIVITY,169(2017),79-84.
MLA Xiong, Xiaohu,et al."Delta(CO2)-C-14 from dark respiration in plants and its impact on the estimation of atmospheric fossil fuel CO2".JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 169.2017(2017):79-84.
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