气候变化领域集成服务门户(CCPortal): Geochemical and sedimentological responses of arctic glacial Lake Ilirney; chukotka (far east Russia) to palaeoenvironmental change since ∼51.8 ka BP

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DOI	10.1016/j.quascirev.2020.106607
	Geochemical and sedimentological responses of arctic glacial Lake Ilirney; chukotka (far east Russia) to palaeoenvironmental change since ∼51.8 ka BP
	Vyse S.A.; Herzschuh U.; Andreev A.A.; Pestryakova L.A.; Diekmann B.; Armitage S.J.; Biskaborn B.K.
发表日期	2020
ISSN	0277-3791
卷号	247
英文摘要	Palaeoenvironmental reconstructions with temporal coverages extending beyond Marine Isotope Stage (MIS) three are scarce within the data sparse region of Chukotka, Far East Russia. The objective of this paper is to infer palaeoenvironmental variability from a 10.76 m long, OSL- and 14C- dated sediment core from Lake Ilirney, Chukotka (67°21′N, 168°19′E). We analysed high-resolution sediment-geochemistry (XRF), sedimentology (TC, TN, TOC, grain-size), mineralogy (XRD) and preliminary micropalaeontological data (diatoms and pollen) from the core as well as acoustic sub-bottom profiling data from the lake basin. Our results affirm the application of XRF-based sediment-geochemical proxies as effective tracers of palaeoenvironmental variability within arctic lake systems. Our study reveals that a lake formed during MIS3 from 51.8 (±4.1) ka BP, following extensive MIS4 glaciation. Catchment palaeoenvironmental conditions during this time remained harsh associated with the continued presence of a catchment glacier until 36.2 (±2.6) ka BP. Partial amelioration reflected by increased diatom, catchment vegetation and lake organic productivity and clastic sediment input from mixed sources from 36.2 (±2.6) ka BP resulted in a lake high-stand ∼15 m above present and is interpreted as evidence of a more productive palaeoenvironment coincident with the MIS3 interstadial optimum. A transitional period of deteriorating palaeoenvironmental conditions occurred ∼30–27.9 ka BP and was superseded by periglacial-glacial conditions from 27.9 (±0.8) ka BP, during the last glacial maximum. Deglaciation as marked by sediment-geochemical proxies commenced at 20.2 (±0.8) ka BP. Our findings are compared with lacustrine, Yedoma and river-bluff records from across Beringia and potentially yield limited support for a marked Younger Dryas cooling in the study area. © 2020 The Authors
英文关键词	Arctic; Late quaternary; MIS3; Palaeoenvironmetal change; Palaeolimnology; Russia; XRF
语种	英语
scopus关键词	Catchments; Geochemistry; Lakes; Minerals; Runoff; Sediments; Clastic sediments; Geochemical proxies; Last Glacial Maximum; Marine isotope stages; Palaeoenvironment; Palaeoenvironmental reconstruction; Sediment geochemistries; Transitional period; Glacial geology; catchment; clastic sediment; deglaciation; detection method; geochemistry; Last Glacial Maximum; marine isotope stage; paleoenvironment; reconstruction; sediment chemistry; sediment core; sedimentology; Chukchi; Far East; Russian Federation; Bacillariophyta
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/151295
作者单位	Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Research Unit Potsdam, Telegrafenberg A45, Potsdam, 14471, Germany; Institute of Environmental Science and Geography, University of Potsdam, Potsdam, Germany; Institute of Biochemistry and Biology, University of Potsdam, Potsdam, Germany; Northeastern Federal University of Yakutsk, Yakutsk, Russian Federation; Centre for Quaternary Research, Department of Geography, Royal Holloway University of London, Surrey TW20 0EX, Egham, United Kingdom; SFF Centre for Early Sapiens Behaviour (SapienCE), University of Bergen, Post Box 7805, Bergen, 5020, Norway
推荐引用方式 GB/T 7714	Vyse S.A.,Herzschuh U.,Andreev A.A.,et al. Geochemical and sedimentological responses of arctic glacial Lake Ilirney; chukotka (far east Russia) to palaeoenvironmental change since ∼51.8 ka BP[J],2020,247.
APA	Vyse S.A..,Herzschuh U..,Andreev A.A..,Pestryakova L.A..,Diekmann B..,...&Biskaborn B.K..(2020).Geochemical and sedimentological responses of arctic glacial Lake Ilirney; chukotka (far east Russia) to palaeoenvironmental change since ∼51.8 ka BP.Quaternary Science Reviews,247.
MLA	Vyse S.A.,et al."Geochemical and sedimentological responses of arctic glacial Lake Ilirney; chukotka (far east Russia) to palaeoenvironmental change since ∼51.8 ka BP".Quaternary Science Reviews 247(2020).