Clumped and stable isotopes of land snail shells on the Chinese Loess Plateau and their climatic implications

doi:10.1016/j.chemgeo.2019.119414

	Clumped and stable isotopes of land snail shells on the Chinese Loess Plateau and their climatic implications
	Dong, Jibao 2,3; Eiler, John 1; An, Zhisheng 2,3; Wu, Naiqin 4; Liu, Weiguo 3; Li, Xiangzhong 3; Kitchen, Nami 1; Lu, Fengyan 3
刊名	CHEMICAL GEOLOGY
	2020-02-05
卷号	533 页码:10
关键词	Clumped isotopes Stable isotopes Land snail Temperature Chinese Loess Plateau (CLP)
ISSN号	0009-2541
DOI	10.1016/j.chemgeo.2019.119414
通讯作者	Dong, Jibao(djb@ieecas.cn)
英文摘要	We report stable (delta C-13(shell), delta O-18(shell)) and clumped isotope (Delta(47)) compositions of modern and last glacial fossil snail shell carbonates from the Luochuan and Weinan sections on the central and southern Chinese Loess Plateau (CLP). Our study reveals that the average Delta(47) temperature (T-47) of modern snails is consistent with monitored temperatures during the snail growing season at the studied locations and is similar to 10 degrees C higher than that of fossil snails from glacial time. Moreover, the average delta C-13(shell) of modern snails is more depleted than that of fossils. We argue that the delta C-13(shell) cannot record changes in plant communities (i.e., the C3/C4 ratio) on the CLP and may mainly indicate arid conditions with depleted values reflecting reduced aridity. Additionally, the reconstructed snail body water delta O-18 (delta O-18(water)) of modern snails is more enriched than delta O-18 in modern growing season precipitation and delta O-18(water) of fossils. This contrast may be related to the high degree of evaporative enrichment of environmental water O-18 in the body/ingested by modern snails under warm conditions. Therefore, we suggest that using delta O-18(shell) to directly reconstruct the oxygen isotopes of precipitation is difficult and that higher delta O-18(shell) and delta O-18(water) values probably indicate higher environmental temperature/stronger evaporative enrichment on glacial-interglacial timescales on the CLP.
资助项目	Training Program of the State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences[QYZDY-SSW-DQC001] ; Training Program of the State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences[ZDBS-SSW-DQC001] ; MOST program[2016YFE0109500] ; National Natural Science Foundation of China[41430103] ; National Natural Science Foundation of China[41302152] ; [EAR-0909199] ; [EAR 1211378]
WOS关键词	RADIOCARBON AGE ANOMALIES ; SOUTHERN GREAT-PLAINS ; SYNTHETIC ARAGONITE ; YOUNGER DRYAS ; ASIAN MONSOON ; LOW-LATITUDE ; NORTH CHINA ; BODY-WATER ; CARBON ; OXYGEN
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000513871400004
资助机构	Training Program of the State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences ; MOST program ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/12705]
专题	地球环境研究所_加速器质谱中心第四纪科学与全球变化卓越创新中心
通讯作者	Dong, Jibao
作者单位	1.CALTECH, Pasadena, CA 91125 USA 2.Chinese Acad Sci, CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China
推荐引用方式 GB/T 7714	Dong, Jibao,Eiler, John,An, Zhisheng,et al. Clumped and stable isotopes of land snail shells on the Chinese Loess Plateau and their climatic implications[J]. CHEMICAL GEOLOGY,2020,533:10.
APA	Dong, Jibao.,Eiler, John.,An, Zhisheng.,Wu, Naiqin.,Liu, Weiguo.,...&Lu, Fengyan.(2020).Clumped and stable isotopes of land snail shells on the Chinese Loess Plateau and their climatic implications.CHEMICAL GEOLOGY,533,10.
MLA	Dong, Jibao,et al."Clumped and stable isotopes of land snail shells on the Chinese Loess Plateau and their climatic implications".CHEMICAL GEOLOGY 533(2020):10.