Carbon isotope and environmental changes in lakes in arid Northwest China

作     者：Weiguo LIU Xiangzhong LI Zheng WANG Huangye WANG Hu LIU Bo ZHANG Huan ZHANG 

作者机构：Institute of Earth EnvironmentCASState Key Laboratory of Loess and Quaternary GeologyXi’an 710061China University of Chinese Academy of SciencesBeijing 100049China 

出 版 物：《Science China Earth Sciences》 (中国科学（地球科学英文版）)

年 卷 期：2019年第62卷第8期

页      面：1193-1206页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the CAS Strategic Priority Research Program (Grant No. XDA05120400) 

主　　题：Carbon isotope Lake Arid region of northwestern China Total organic carbon Organic biomarkers 

摘      要：The stable carbon isotope composition(δ13 C) of lacustrine sediments, which can record changes in past environmental conditions such as the C4/C3 terrestrial vegetation composition, has been widely used for the reconstruction of terrestrial ecosystems and global climate changes. It has also been widely used in paleolimnological studies in arid northwestern China. In recent years, however, an increasing number of studies have enriched the environmental significance reflected by the stable carbon isotope geochemistry of lakes;therefore, the interpretation of lake δ13 C variations in paleoenvironmental reconstructions should be carefully evaluated from various aspects. In this paper, previous studies from the past several decades on the lacustrineδ13 C variations in arid northwestern China were reviewed, and the possible mechanisms of the δ13 C variations were *** study will provide a reference for the application of carbon isotope geochemistry in paleoenvironmental reconstructions.