气候变化领域集成服务门户(CCPortal): Distribution of n-alkan-2-ones in Qionghai Lake sediments, southwest China, and its potential for late Quaternary paleoclimate reconstruction

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DOI	10.1002/jqs.3271
	Distribution of n-alkan-2-ones in Qionghai Lake sediments, southwest China, and its potential for late Quaternary paleoclimate reconstruction
	Wang, Gen; Wang, Yongli; Wei, Zhifu; He, Wei; Zhang, Ting; Ma, Xueyun; Yu, Xiaoli
通讯作者	Wei, ZF (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources Res, Lanzhou, Peoples R China. ; Wang, YL (通讯作者)，Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China. ; Wang, YL (通讯作者)，Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China.
发表日期	2021
ISSN	0267-8179
EISSN	1099-1417
起始页码	288
结束页码	297
卷号	36 期号:2
英文摘要	Studies on long-chain n-alkan-2-ones from lake sediments remain sparse. In this study, we present an n-alkan-2-one record from Qionghai Lake, southwest China, to assess the paleoclimate significance of variations in their compositions. A homologous series of n-alkan-2-ones ranging from C-21 to C-35 were identified, with maximum concentrations of the C-29 or C-31 chain lengths and a strong odd-over-even predominance. This type of n-alkan-2-one is considered to derive mainly from microbial oxidation of the corresponding n-alkanes, and partial inputs from plants. The n-alkan-2-one-derived average chain length (ACL) and carbon preference index (CPI) values changed significantly over the past 28k cal a bp, consistent with the sediment grain size and n-alkane proxies from the same core. Generally, the high CPI27-33-ket and low ACL(27-33)-ket values indicated cold and dry climates such as for the Last Glacial Maximum (23.2-19.7k cal a bp), Heinrich 1 event (17.6-15.6k cal a bp) and Younger Dryas (12.8-11.6k cal a bp), but low CPI27-33-ket and high ACL(27-33)-ket values denoted a warm and humid Holocene Climatic Optimum (7.0-4.3k cal a bp). Therefore, n-alkan-2-ones have great paleoclimatic potential and can be applied together with other biomarkers to reconstruct a reliable paleoclimate record in lake sediments. Copyright (c) 2021 John Wiley & Sons, Ltd.
英文关键词	biomarkers; lake sediments; late Pleistocene; paleoclimatic changes; southwest monsoon
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000613644600001
来源期刊	JOURNAL OF QUATERNARY SCIENCE
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254018
作者单位	[Wang, Gen; Wei, Zhifu; He, Wei; Zhang, Ting; Ma, Xueyun; Yu, Xiaoli] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources Res, Lanzhou, Peoples R China; [Wang, Yongli] Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing, Peoples R China; [Wang, Yongli] Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Beijing, Peoples R China; [He, Wei; Zhang, Ting; Ma, Xueyun; Yu, Xiaoli] Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Gen,Wang, Yongli,Wei, Zhifu,et al. Distribution of n-alkan-2-ones in Qionghai Lake sediments, southwest China, and its potential for late Quaternary paleoclimate reconstruction[J]. 中国科学院西北生态环境资源研究院,2021,36(2).
APA	Wang, Gen.,Wang, Yongli.,Wei, Zhifu.,He, Wei.,Zhang, Ting.,...&Yu, Xiaoli.(2021).Distribution of n-alkan-2-ones in Qionghai Lake sediments, southwest China, and its potential for late Quaternary paleoclimate reconstruction.JOURNAL OF QUATERNARY SCIENCE,36(2).
MLA	Wang, Gen,et al."Distribution of n-alkan-2-ones in Qionghai Lake sediments, southwest China, and its potential for late Quaternary paleoclimate reconstruction".JOURNAL OF QUATERNARY SCIENCE 36.2(2021).