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Observations of Atmospheric Δ~(14)CO_2 at the Global and Regional Background Sites in China: Implication for Fossil Fuel CO_2 Inputs

机译:中国全球和区域本底站点大气Δ〜(14)CO_2的观测:对化石燃料CO_2输入的影响

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摘要

Six months to more than one year of atmospheric Δ~(14)CO_2 were measured in 2014-2015 at one global background site in Waliguan (WLG) and four regional background sites at Shangdianzi (SDZ), Lin'an (LAN), Longfengshan (LFS) and Luhuitou (LHT), China. The objectives of the study are to document the Δ~(14)CO_2 levels at each site and to trace the variations in fossil fuel CO_2 (CO_(2ff)) inputs at regional background sites. Δ~(14)CO_2 at WLG varied from 7.1 ± 2.9‰ to 32.0 ± 3.2‰ (average 17.1 ± 6.8‰) in 2015, with high values generally in autumn/summer and low values in winter/spring. During the same period, Δ~(14)CO_2 values at the regional background sites were found to be significantly (p < 0.05) lower than those at WLG, indicating different levels of CO_(2ff) inputs at those sites. CO_(2ff) concentrations at LAN (12.7 ± 9.6 ppm) and SDZ (11.5 ± 8.2 ppm) were significantly (p < 0.05) higher than those at LHT (4.6 ± 4.3 ppm) in 2015. There were no significant (p > 0.05) seasonal differences in CO_(2ff) concentrations for the regional sites. Regional sources contributed in part to the CO_(2ff) inputs at LAN and SDZ, while local sources dominated the trend observed at LHT. These data provide a preliminary understanding of atmospheric Δ~(14)CO_2 and CO_(2ff) inputs for a range of Chinese background sites.
机译:2014-2015年在瓦里关(WLG)的一个全球背景点和龙凤山临安(LAN)的上店子(SDZ)的四个区域背景点测量了六个月至一年以上的大气Δ〜(14)CO_2 (LFS)和鹿回头(LHT),中国。该研究的目的是记录每个站点的Δ〜(14)CO_2水平,并追踪区域背景站点的化石燃料CO_2(CO_(2ff))输入的变化。 2015年WLG的Δ〜(14)CO_2从7.1±2.9‰到32.0±3.2‰(平均17.1±6.8‰)不等,秋季/夏季普遍较高,冬季/春季较低。在同一时期,区域背景站点的Δ〜(14)CO_2值显着低于(p <0.05)WLG站点,表明这些站点的CO_(2ff)输入水平不同。 2015年,LAN(12.7±9.6 ppm)和SDZ(11.5±8.2 ppm)的CO_(2ff)浓度显着(p <0.05)高于LHT(4.6±4.3 ppm)的浓度。无显着性(p> 0.05) )区域站点的CO_(2ff)浓度的季节性差异。区域来源部分导致了LAN和SDZ的CO_(2ff)输入,而本地来源主导了LHT观察到的趋势。这些数据初步了解了一系列中国背景站点的大气Δ〜(14)CO_2和CO_(2ff)输入。

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  • 来源
    《Environmental Science & Technology》 |2016年第22期|12122-12128|共7页
  • 作者单位

    State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China,Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an AMS Center, Xi'an, China;

    State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China,Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an AMS Center, Xi'an, China,Beijing Normal University, Beijing, China;

    State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China,Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an AMS Center, Xi'an, China;

    State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China,Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an AMS Center, Xi'an, China;

    State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China,Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an AMS Center, Xi'an, China;

    State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China,Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an AMS Center, Xi'an, China;

    State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China,Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an AMS Center, Xi'an, China;

    State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China,Shaanxi Provincial Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi'an AMS Center, Xi'an, China;

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