Hydrogen isotope ratios of leaf wax n-alkanes in loess and floodplain deposits in northern China since the Last Glacial Maximum and their paleoclimatic significance

doi:10.1016/j.palaeo.2017.08.009

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院新生代地质与环境重点实验室

	Hydrogen isotope ratios of leaf wax n-alkanes in loess and floodplain deposits in northern China since the Last Glacial Maximum and their paleoclimatic significance
	Li, Yangyang 1,2; Yang, Shiling 1,2; Xiao, Jule 1,2; Jiang, Wenying 1; Yang, Xiaoxiao 1,2
刊名	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
	2018-11-15
卷号	509 页码:91-97
关键词	n-Alkanes Compound-specific hydrogen isotope composition East Asian Summer Monsoon Holocene Last Glacial Maximum
ISSN号	0031-0182
DOI	10.1016/j.palaeo.2017.08.009
英文摘要	The hydrogen isotopic composition of leaf-wax n-alkanes (delta Dn-alkane) is increasingly used as a proxy for estimating delta D of past precipitation (delta D-p). However, aridity can also affect sedimentary delta Dn-alkane, complicating the interpretation of paleo-delta Dn-alkane records. In order to evaluate the effects of the complex interactions and balance between precipitation hydrogen isotope composition and aridity on sedimentary delta Dn-alkane records, we present two delta Dn-alkane records from the North China Plain and the western Chinese Loess Plateau across a steep east-west climatic gradient in the East Asian Summer Monsoon area since the Last Glacial Maximum. The estimated delta D-p changes, based on a present-day relationship between delta D-p and rainfall amounts, can explain much of the delta Dn-alkane variations in the North China Plain, but do not explain the large variations of delta Dn-alkane in the western Chinese Loess Plateau. Comparison of delta Dn-alkane records with observed On-alkane values in modern plants and published pollen data indicates that changes in vegetation play a minor role in the variations of delta Dn-alkane. Instead, delta Dn-alkane, values are coincident with aridity both temporally and spatially, i.e. the higher delta Dn-alkane values the drier climate and vice versa. Aridity effects are more evident in the western Chinese Loess Plateau than in the North China Plain. Therefore, on glacial-interglacial scale, sedimentary delta Dn-alkane records from the North China Plain mostly reflect changes in delta D-p values, whereas those from the western Chinese Loess Plateau largely reflect the effects of aridity, mainly due to a greater evapotranspirational deuterium-enrichment caused by a drier climate in the western Chinese Loess Plateau than in the North China Plain. Further calibrations from modem sediments are required to better define the quantitative relationship between the delta Dn-alkane and climate in northern China. (C) 2017 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41672175] ; National Basic Research Program of China[2015CB953804] ; Chinese Academy of Sciences[XDB03020503]
WOS关键词	DELTA-D VALUES ; AQUATIC PLANTS ; D/H RATIOS ; CLIMATE VARIABILITY ; TERRESTRIAL PLANTS ; PRECIPITATION ; BIOMARKERS ; PLATEAU ; RECORD ; VEGETATION
WOS研究方向	Physical Geography ; Geology ; Paleontology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000447578200008
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Basic Research Program of China ; National Basic Research Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Basic Research Program of China ; National Basic Research Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Basic Research Program of China ; National Basic Research Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Basic Research Program of China ; National Basic Research Program of China ; Chinese Academy of Sciences ; Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/89199]
专题	地质与地球物理研究所_中国科学院新生代地质与环境重点实验室
通讯作者	Li, Yangyang
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, Yangyang,Yang, Shiling,Xiao, Jule,et al. Hydrogen isotope ratios of leaf wax n-alkanes in loess and floodplain deposits in northern China since the Last Glacial Maximum and their paleoclimatic significance[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2018,509:91-97.
APA	Li, Yangyang,Yang, Shiling,Xiao, Jule,Jiang, Wenying,&Yang, Xiaoxiao.(2018).Hydrogen isotope ratios of leaf wax n-alkanes in loess and floodplain deposits in northern China since the Last Glacial Maximum and their paleoclimatic significance.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,509,91-97.
MLA	Li, Yangyang,et al."Hydrogen isotope ratios of leaf wax n-alkanes in loess and floodplain deposits in northern China since the Last Glacial Maximum and their paleoclimatic significance".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 509(2018):91-97.