Downcore variations of carbon reservoir ages linked to lake level changes in northwest China

doi:10.1016/j.quageo.2020.101105

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	Downcore variations of carbon reservoir ages linked to lake level changes in northwest China
	Meng, Bowen 1; Zhou, Aifeng 2; Zhang, Yancheng 1; Song, Mu 1; Liu, Weiguo 3; Xie, Zhouqing 4; Li, Shenghua 1; Liu, Zhonghui 1
通讯作者	Zhang, Yancheng(ychzhang@hku.hk)
	2020-10-01
发表期刊	QUATERNARY GEOCHRONOLOGY
ISSN	1871-1014
卷号	60 页码:8
摘要	Lacustrine sediments provide an excellent opportunity to study climate change beyond the instrumental period and further to elucidate its intrinsic interactions with ecosystem. However, the radiocarbon (C-14)-based chronological framework of such natural archives, on which robust interpretation of geochemical proxies primarily depends, is commonly challenged due to the difficulty in properly correcting carbon reservoir effect. Here we combine new and existing C-14 dates on total organic carbon (TOC) in two sediment cores from Lake Qinghai and Manas, northwest China, to evaluate the reservoir effect (expressed by reservoir age, RA) over the past similar to 1500 years. Generally, these two cores characterize RA values ranging from similar to 2100 to 4200 and from similar to 350 to 2100 years respectively. Straightforward comparison with paleorecords generated from the same cores indicates a close correlation between RA changes and lake level fluctuations on multi-centennial timescales. Our results suggest that lake level changes (or hydrological variations), which are expected to control the relative input of terrigenous old carbon, merit careful consideration to reduce dating uncertainty. It is essential to select TOC samples across discrete depths, under the control of similar lake status, to allow comparable RAs and, as a result, to establish reliable chronology.
关键词	Radiocarbon dating Carbon reservoir effect Lacustrine sediment Lake status Last two millennia
DOI	10.1016/j.quageo.2020.101105
关键词[WOS]	HOLOCENE MOISTURE EVOLUTION ; QINGHAI LAKE ; LATE PLEISTOCENE ; RADIOCARBON AGE ; ORGANIC-MATTER ; CENTRAL-ASIA ; DAIHAI LAKE ; ICE-AGE ; PLATEAU ; SEDIMENTS
收录类别	SCI ; SCI
语种	英语
资助项目	Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; HK Research Grants Council[17325516]
WOS研究方向	Physical Geography ; Geology
项目资助者	Strategic Priority Research Program of Chinese Academy of Sciences ; HK Research Grants Council
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000571927500003
出版者	ELSEVIER SCI LTD
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/15349
专题	加速器质谱中心
通讯作者	Zhang, Yancheng
作者单位	1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 2.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Peoples R China 4.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Meng, Bowen,Zhou, Aifeng,Zhang, Yancheng,et al. Downcore variations of carbon reservoir ages linked to lake level changes in northwest China[J]. QUATERNARY GEOCHRONOLOGY,2020,60:8.
APA	Meng, Bowen.,Zhou, Aifeng.,Zhang, Yancheng.,Song, Mu.,Liu, Weiguo.,...&Liu, Zhonghui.(2020).Downcore variations of carbon reservoir ages linked to lake level changes in northwest China.QUATERNARY GEOCHRONOLOGY,60,8.
MLA	Meng, Bowen,et al."Downcore variations of carbon reservoir ages linked to lake level changes in northwest China".QUATERNARY GEOCHRONOLOGY 60(2020):8.