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Climatic and anthropogenic impacts on δ13C variations in a stalagmite from central China.
Tan, LC (Tan, Liangcheng)[ 1 ]; Zhang, HW (Zhang, Haiwei)[ 1,2 ]; Qin, SJ (Qin, Shijiang)[ 1 ]; An, ZS (An, Zhisheng)[ 1 ]
2013-06
发表期刊Terrestrial Atmospheric and Oceanic Sciences
卷号24期号:3页码:333-343
文章类型期刊论文
摘要

In this paper, we present a delta C-13 record that covers the past 750 years at a resolution of 2 - 3 years which was preserved in a precisely dated stalagmite (DY-1) obtained from the Dayu Cave on the south flank of the Qinling Mountains in central China. Between 1249 AD and 1800 AD, climate-induced vegetation changes appear to have been the primary control on delta C-13 values at a centennial scale. Variations in precipitation amounts control the residence time of seepage water and may have affected the dissolution of bedrock, prior carbonate precipitation in the unsaturated zone above the cave, and the degassing of CO2 within the cave. These hydrogeochemical processes are likely to have been the most important controls on delta C-13 levels over annual to decadal scales, and may also have influenced centennial-scale variations. The reduced delta C-13 value of atmospheric CO2 since the Industrial Revolution may have caused the decreasing trend in delta C-13 values seen in stalagmite DY-1 after 1800 AD. Increased visitor numbers in the unventilated Dayu Cave over time produced a large amount of CO2, and maintained a raised level of pCO(2) in the cave air. This artificially enhanced pCO(2) may have decreased the fraction of CO2 degassing, and hence carbonate precipitation, which could partly cause the decreasing trend in the stalagmite delta C-13 seen over the past 200 years.

关键词Stalagmite Carbon Isotopes Climate Anthropogenic Impact
DOI10.3319/TAO.2012.12.27.01(TT)
收录类别SCI
语种英语
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9994
专题现代环境研究室
通讯作者Tan, LC (Tan, Liangcheng)[ 1 ]
作者单位1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment,Chinese Academy of Sciences, Xi’an, China;
2.University of Chinese Academy of Sciences, Beijing, China
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GB/T 7714
Tan, LC ,Zhang, HW ,Qin, SJ ,et al. Climatic and anthropogenic impacts on δ13C variations in a stalagmite from central China.[J]. Terrestrial Atmospheric and Oceanic Sciences,2013,24(3):333-343.
APA Tan, LC ,Zhang, HW ,Qin, SJ ,&An, ZS .(2013).Climatic and anthropogenic impacts on δ13C variations in a stalagmite from central China..Terrestrial Atmospheric and Oceanic Sciences,24(3),333-343.
MLA Tan, LC ,et al."Climatic and anthropogenic impacts on δ13C variations in a stalagmite from central China.".Terrestrial Atmospheric and Oceanic Sciences 24.3(2013):333-343.
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