气候变化领域集成服务门户(CCPortal): Past climate and continentality inferred from ice wedges at Batagay megaslump in the Northern Hemisphere's most continental region; Yana Highlands; interior Yakutia

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DOI	10.5194/cp-15-1443-2019
	Past climate and continentality inferred from ice wedges at Batagay megaslump in the Northern Hemisphere's most continental region; Yana Highlands; interior Yakutia
	Opel T.; Murton J.B.; Wetterich S.; Meyer H.; Ashastina K.; Günther F.; Grotheer H.; Mollenhauer G.; Danilov P.P.; Boeskorov V.; Savvinov G.N.; Schirrmeister L.
发表日期	2019
ISSN	18149324
起始页码	1443
结束页码	1461
卷号	15 期号:4
英文摘要	Ice wedges in the Yana Highlands of interior Yakutia the most continental region of the Northern Hemisphere were investigated to elucidate changes in winter climate and continentality that have taken place since the Middle Pleistocene. The Batagay megaslump exposes ice wedges and composite wedges that were sampled from three cryostratigraphic units: the lower ice complex of likely pre-Marine Isotope Stage (MIS) 6 age, the upper ice complex (Yedoma) and the upper sand unit (both MIS 3 to 2). A terrace of the nearby Adycha River provides a Late Holocene (MIS 1) ice wedge that serves as a modern reference for interpretation. The stable-isotope composition of ice wedges in the MIS 3 upper ice complex at Batagay is more depleted (mean δ 18O about -35 than those from 17 other ice-wedge study sites across coastal and central Yakutia. This observation points to lower winter temperatures and therefore higher continentality in the Yana Highlands during MIS 3. Likewise, more depleted isotope values are found in Holocene wedge ice (mean δ 18O about -29 compared to other sites in Yakutia. Ice-wedge isotopic signatures of the lower ice complex (mean δ 18O about -33) and of the MIS 32 upper sand unit (mean δ 18O from about -33 to -30) are less distinctive regionally. The latter unit preserves traces of fast formation in rapidly accumulating sand sheets and of postdepositional isotopic fractionation. © 2019 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	air temperature; continental margin; ice margin; isotopic composition; marine isotope stage; Northern Hemisphere; paleoclimate; Pleistocene-Holocene boundary; seasonality; Russian Federation; Sakha
来源期刊	Climate of the Past
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146791
作者单位	Permafrost Laboratory, Department of Geography, University of Sussex, Brighton, BN1 9RH, United Kingdom; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Telegrafenberg A45, Potsdam, 14473, Germany; Senckenberg Research Institute and Natural History Museum, Research Station of Quaternary Palaeontology, Weimar, 99423, Germany; Institute of Geosciences, University of Potsdam, Karl-Liebknecht-Str. 24-25, Potsdam, 14476, Germany; Laboratory Geoecology of the North, Faculty of Geography, Lomonosov Moscow State University, Leninskie Gory 1, Moscow, 119991, Russian Federation; Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Am Handelshafen 12, Bremerhaven, 27570, Germany; Science Research Institute of Applied Ecology of the North, North-East Federal University, 43 Lenin Avenue, Yakutsk, 677007, Russian Federation
推荐引用方式 GB/T 7714	Opel T.,Murton J.B.,Wetterich S.,et al. Past climate and continentality inferred from ice wedges at Batagay megaslump in the Northern Hemisphere's most continental region; Yana Highlands; interior Yakutia[J],2019,15(4).
APA	Opel T..,Murton J.B..,Wetterich S..,Meyer H..,Ashastina K..,...&Schirrmeister L..(2019).Past climate and continentality inferred from ice wedges at Batagay megaslump in the Northern Hemisphere's most continental region; Yana Highlands; interior Yakutia.Climate of the Past,15(4).
MLA	Opel T.,et al."Past climate and continentality inferred from ice wedges at Batagay megaslump in the Northern Hemisphere's most continental region; Yana Highlands; interior Yakutia".Climate of the Past 15.4(2019).