DOI: 10.1016/j.quascirev.2014.10.018
Scopus记录号: 2-s2.0-84910646903
论文题名: 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)
作者: Möller P. ; Alexanderson H. ; Funder S. ; Hjort C.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 107 起始页码: 149
结束页码: 181
语种: 英语
英文关键词: Eurasian ice sheet
; Glaciation history
; Palaeoenvironmental reconstruction
; Taimyr
; Weichselian chronology
Scopus关键词: Ice
; Isotopes
; Landforms
; Plants (botany)
; Sea level
; Glaciation history
; Ice sheet
; Palaeoenvironmental reconstruction
; Taimyr
; Weichselian chronology
; Glacial geology
; chronology
; continental shelf
; glacial history
; ice sheet
; isotopic analysis
; Last Glacial
; paleoclimate
; paleoenvironment
; permafrost
; reconstruction
; transgression
; Arctic
; Arctic Ocean
; Byrranga Mountains
; Kara Sea
; Krasnoyarsk [Russian Federation]
; Russian Federation
英文摘要: We here suggest a glacial and climate history of the Taimyr Peninsula and Severnaya Zemlya archipelago in arctic Siberia for the last about 150000 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. 400km 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 140m 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. ma.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. 100km 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. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60056
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Geology, Lund University, Sölvegatan 12, Lund, Sweden; Geological Museum, University of Copenhagen, Øster Voldgade 5-7, Copenhagen, Denmark
Recommended Citation:
Möller P.,Alexanderson H.,Funder S.,et al. 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)[J]. Quaternary Science Reviews,2015-01-01,107