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The Taimyr Peninsula and the Severnaya Zemlya archipelago, Arctic Russia: a synthesis of glacial history and palaeo-environmental change during the Last Glacial cycle (MIS 5e-2)
Responsible organisation
2015 (English)In: Quaternary Science Reviews, ISSN 0277-3791, E-ISSN 1873-457X, Vol. 107Article in journal (Refereed) Published
Abstract [en]

We here suggest a glacial and climate history of the Taimyr Peninsula and Severnaya Zemlya archipelago in arctic Siberia for the last about 150 000 years (ka). Primarily it is based on results from seven field seasons between 1996 and 2012, to a large extent already published in papers referred to in the text and on data presented by Russian workers from the 1930s to our days and by German colleagues working there since the 1990s. Although glaciations even up here often started in the local mountains, their culminations in this region invariably seems to have centred on the shallow Kara Sea continental shelf - most likely due to expanding marine ice-shelves grounding there, as a combined effect of thickening ice and eustatically lowered sea-levels. The most extensive glaciation so far identified in this region (named the Taz glaciation) took place during Marine Isotope Stage 6 (MIS 6), i.e. being an equivalent to the late Saale/Illinoian glaciations. It reached c. 400 km southeast of the Kara Sea coast, across and well beyond the Byrranga Mountain range and ended c. 130 ka. It was followed by the MIS 5e (Karginsky/Eemian) interglacial, with an extensive marine transgression to 140 m above present sea level - facilitated by strong isostatic downloading during the preceding glaciation. During the latest (Zyryankan/Weichselian/Wisconsinan) glacial cycle followed a series of major glacial advances. The earliest and most extensive, culminating C. 110-100 ka (MIS 5d-5e), also reached south of the Byrranga mountains and its post-glacial marine limit there was c. 100 m a.s.l. The later glacial phases (around 70-60 ka and 20 ka) terminated at the North Taimyr Ice Marginal Zone (NTZ), along or some distance inland from the present northwest coast of Taimyr. They dammed glacial lakes, which caused the Taimyr River to flow southwards where to-day it flows northwards into the Kara Sea. The c. 20 ka glacial phase, contemporary with the maximum (LGM) glaciation in NW Europe, was this glacial cycle's least extensive one up here probably an effect of precipitation shadow caused by the major glaciations to the west. From the Kara Sea shelf this advance only reached c. 100 km inland, over some limited parts of NW Taimyr. The Severnaya Zemlya islands were only locally glaciated at this time. The lowlands south of the Byrranga Mountains have been a terrestrial "Mammoth steppe" environment during the last c. 50 ka and periglacial permafrosted sediments here have preserved excellent information on its megafauna and vegetation. The latter, according to new DNA-data, had considerably more (for grazing animals nourishing) flowering plants growing than earlier pollen-based (grass dominated) spectra have suggested. (C) 2014 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
2015. Vol. 107
Keyword [en]
Eurasian ice sheet Taimyr Glaciation history Palaeoenvironmental reconstruction Weichselian chronology eurasian ice-sheet late quaternary stratigraphy western yamal peninsula northern eurasia kara sea taymyr peninsula paleoenvironmental history pleistocene sediments lomonosov ridge global climate Physical Geography Geology
Research subject
SWEDARCTIC 2002, Sibirien 2002; SWEDARCTIC 2003, Sibirien 2003; SWEDARCTIC 2010, Tajmyr 2010; SWEDARCTIC 2012, Tajmyr 2012; SWEDARCTIC 1998, Tajmyr 1998; SWEDARCTIC 1999, Tajmyr 1999
Identifiers
URN: urn:nbn:se:polar:diva-1921DOI: 10.1016/j.quascirev.2014.10.018OAI: oai:DiVA.org:polar-1921DiVA: diva2:810211
Note

ISI Document Delivery No.: AY5AO Times Cited: 0 Cited Reference Count: 86 Moeller, Per Alexanderson, Helena Funder, Svend Hjort, Christian European Union [ENV4-CT97-0563]; Swedish Natural Science Research Council [G-650-199815671/2000, 621-2008-3759]; Swedish Polar Research Secretariat (SPRS) This work has been carried out as a cooperative venture between Lund University (Sweden) and the Arctic and Antarctic Research Institute (AARI, St. Petersburg, Russia) within the European Union financed 'Eurasian ice sheets' project (contract no. ENV4-CT97-0563) under the European Science Foundation's Quaternary Environments of the Eurasian North (QUEEN) programme umbrella, later followed by the APEX (Arctic Palaeoenvironments and its Extremes) research umbrella. Specific project funding for research on Taimyr was provided through grants from the Swedish Natural Science Research Council (VR) to P. Moller (contract nos. G-650-199815671/2000 and 621-2008-3759) and logistics were mainly arranged and, to a large extent paid for, by the Swedish Polar Research Secretariat (SPRS), and through subcontracts to INTAARI (St Petersburg, Russia). Special thanks go to Magnus Augner, Asa Lindgren and Magnus Tannerfeldt at SPRS and Dimitry Bolshiyanov at AARI for painstaking work with logistical planning, expedition permits and handling of all equipment and samples in and out of Russia. Anatoly Molodkov, Tallin Technical University, Estonia, performed ESR datings and provided background information on ESR dating. Andrew Murray at the Nordic Laboratory for Luminescence Dating, Rise), Denmark and Mark D. Bateman at Sheffield luminescence laboratory, Sheffield University, England, performed OSL datings and provided background information and discussion on OSL dating problems. QSR reviewers Jon Landvik and Frank Niessen came with utterly constructive criticism and comments of the original draft of the paper. Thanks to you all! 0 Pergamon-elsevier science ltd Oxford Geography, Physical; Geosciences, Multidisciplinary

Available from: 2015-05-06 Created: 2015-05-06 Last updated: 2015-09-14

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