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DOI	10.1016/j.quascirev.2019.105997
	Paleoenvironmental and paleoclimatic variations around Lake Van (Eastern Turkey) recorded by sedimentary source specific biomarkers 250–130 ka (MIS7 and MIS6)
	Guillemot T.; Stockhecke M.; Bechtel A.; Ladd S.N.; Nelson D.B.; Schubert C.J.
发表日期	2019
ISSN	0277-3791
卷号	225
英文摘要	Paleoclimatic changes during MIS7 and MIS6 remain poorly described in the Near East. We quantified source-specific biomarkers in Lake Van sediments during the interglacial/glacial cycle MIS7/MIS6. Long-chain n-alkanes produced by land-derived vegetation, as well as long-chain alkenones and sterols (namely brassicasterol and dinosterol) produced by aquatic algae were investigated. Stable hydrogen isotopic measurements (δ2H) on n-C29 alkanes were used as a proxy for aridity and revealed three wetter periods interrupted by two drier intervals during MIS7. In contrast, during the MIS6 glaciation, a generally drier climate was predominant. During the warmer and wetter periods of MIS7, a higher input of aquatic organic matter to Lake Van sediments was recorded by higher concentrations of long-chain alkenones, dinosterol and brassicasterol. Long-chain alkane abundances do not show a pattern related to aridity and were observed in higher concentrations in wetter as well as drier periods. Generally, in the Eastern Mediterranean, a wetter interglacial interrupted by drier episodes followed by a dry glacial period was the common feature observed during the MIS7/MIS6 interglacial/glacial cycle. However, in comparison to the last interglacial/glacial cycle the extreme dry glacial period registered around Lake Van from MIS5d to MIS2 was apparently unique and not equaled by a similar event within the last 250 ka. © 2019 Elsevier Ltd
英文关键词	Biomarkers; Compound specific hydrogen isotopes; Lake van; Middle east; Organic geochemistry; Paleoclimatology; Paleohydrology; Quaternary
语种	英语
scopus关键词	Biomarkers; Driers (materials); Geochemistry; Glacial geology; Isotopes; Paraffins; Hydrogen isotope; Lake vans; Middle East; Organic geochemistry; Paleo-hydrology; Paleoclimatology; Quaternary; Lakes; biomarker; glacial-interglacial cycle; hydrogen isotope; marine isotope stage; organic geochemistry; paleoclimate; paleoenvironment; paleohydrology; proxy climate record; Quaternary; Lake Van; Turkey; algae
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151695
作者单位	Eawag, Swiss Federal Institute of Aquatic Science and Technology, Surface Waters – Research and Management, Kastanienbaum, Switzerland; Montanuniversitaet, Petroleum Geology, Leoben, Austria
推荐引用方式 GB/T 7714	Guillemot T.,Stockhecke M.,Bechtel A.,等. Paleoenvironmental and paleoclimatic variations around Lake Van (Eastern Turkey) recorded by sedimentary source specific biomarkers 250–130 ka (MIS7 and MIS6)[J],2019,225.
APA	Guillemot T.,Stockhecke M.,Bechtel A.,Ladd S.N.,Nelson D.B.,&Schubert C.J..(2019).Paleoenvironmental and paleoclimatic variations around Lake Van (Eastern Turkey) recorded by sedimentary source specific biomarkers 250–130 ka (MIS7 and MIS6).Quaternary Science Reviews,225.
MLA	Guillemot T.,et al."Paleoenvironmental and paleoclimatic variations around Lake Van (Eastern Turkey) recorded by sedimentary source specific biomarkers 250–130 ka (MIS7 and MIS6)".Quaternary Science Reviews 225(2019).