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Carbon and oxygen isotopic records from Lake Tuosu over the last 120 years in the Qaidam Basin, Northwestern China: The implications for paleoenvironmental reconstruction
Li, Xiangzhong1; Zhou, Xin2,3; Liu, Weiguo1,4; Wang, Zheng1; He, Yuxin5; Xu, Liming6
2016-06-01
发表期刊GLOBAL AND PLANETARY CHANGE
卷号141页码:54-62
文章类型Article
摘要Isotopic compositions of total organic carbon (TOC) and authigenic carbonate in lakes have been widely used to reconstruct paleoclimatic changes and the depositional environments of lake sediments. However, since these proxies are often controlled by multiple environmental factors, detailed examinations of modern environmental processes is necessary before further applying them into paleoclimatic studies, especially in arid/semi-arid northwestern China. Here we generate High -resolution multi-proxy sedimentary records from Lake Tuosu, a hydrologically closed, saline and alkaline lake located at the north margin of the Qaidam Basin, through analysis of carbon isotope of TOC, and delta O-18 and delta C-13 values of ostracods over the last 120 years. Together with the meteorological data (precipitation and temperature), lake area record, and other tree-ring evidence, we examine how these sedimentary indices respond to changes in hydrologic balance and climate at interannual to decadal timescales. We found that sedimentary delta(13)Corg values resemble the variation of lake areas of Lake Tuosu over the last 40 years, suggesting that delta(13)Corg values would be an ideal indicator of lake area/level fluctuations and thus effective moisture variations (precipitation vs. evaporation). However, ostracod delta O-18, which was previously used as proxies of effective precipitation, is not well correlated with delta(13)Corg values in Lake Tuosu. Therefore, the changes of ostracod delta O-18 values cannot be straightforwardly explained as the effective precipitation. Instead, the isotopic composition of carbonate would be additionally controlled by other factors including isotopic compositions of input water and drainage pattern. (C) 2016 Elsevier B.V. All rights reserved.
关键词Delta C-13 And Delta O-18 Ostracoda Total Organic Carbon Paleoenvironment Qaidam Basin
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]QINGHAI-TIBET PLATEAU ; ATMOSPHERIC CO2 CONCENTRATION ; LACUSTRINE ORGANIC-MATTER ; EARLY HOLOCENE ; STABLE-ISOTOPE ; RECENT SEDIMENTS ; SHELL CHEMISTRY ; CLIMATE-CHANGE ; C-4 PLANTS ; TREE-RINGS
收录类别SCI
语种英语
WOS研究方向Physical Geography ; Geology
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号WOS:000377317300005
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6326
专题青海盐湖研究所知识仓储
中国科学院青海盐湖研究所
作者单位1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.Univ Sci & Technol China, Inst Polar Environm, Hefei 230026, Peoples R China
3.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China
4.Xi An Jiao Tong Univ, Sch Human Settlement & Civil Engn, Xian 710049, Peoples R China
5.Zhejiang Univ, Sch Earth Sci, Hangzhou 310027, Zhejiang, Peoples R China
6.Chinese Acad Sci, Qinghai Inst Salt Lakes, Xining 810008, Peoples R China
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Li, Xiangzhong,Zhou, Xin,Liu, Weiguo,et al. Carbon and oxygen isotopic records from Lake Tuosu over the last 120 years in the Qaidam Basin, Northwestern China: The implications for paleoenvironmental reconstruction[J]. GLOBAL AND PLANETARY CHANGE,2016,141:54-62.
APA Li, Xiangzhong,Zhou, Xin,Liu, Weiguo,Wang, Zheng,He, Yuxin,&Xu, Liming.(2016).Carbon and oxygen isotopic records from Lake Tuosu over the last 120 years in the Qaidam Basin, Northwestern China: The implications for paleoenvironmental reconstruction.GLOBAL AND PLANETARY CHANGE,141,54-62.
MLA Li, Xiangzhong,et al."Carbon and oxygen isotopic records from Lake Tuosu over the last 120 years in the Qaidam Basin, Northwestern China: The implications for paleoenvironmental reconstruction".GLOBAL AND PLANETARY CHANGE 141(2016):54-62.
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