globalchange  > 气候减缓与适应
DOI: 10.1016/j.quascirev.2018.03.005
Scopus记录号: 2-s2.0-85044168516
论文题名:
Repeated megafloods from glacial Lake Vitim, Siberia, to the Arctic Ocean over the past 60,000 years
作者: Margold M.; Jansen J.D.; Codilean A.T.; Preusser F.; Gurinov A.L.; Fujioka T.; Fink D.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 187
起始页码: 41
结束页码: 61
语种: 英语
Scopus关键词: Climate change ; Floods ; Geochronology ; Isotopes ; Lakes ; Luminescence ; Abrupt climate change ; Cosmogenic nuclides ; Last deglaciation ; Last Glacial Maximum ; Optically stimulated luminescence ; Outburst floods ; Oxygen isotopes ; Peak discharge ; Glacial geology ; core analysis ; flood ; glacial history ; glacial lake ; glaciation ; glaciolacustrine deposit ; last deglaciation ; Last Glacial Maximum ; meltwater ; outburst ; overprinting ; paleoenvironment ; reconstruction ; Arctic Ocean ; Eurasia ; Lena Delta ; North America ; Russian Federation ; Sakha
英文摘要: Cataclysmic outburst floods transformed landscapes and caused abrupt climate change during the last deglaciation. Whether such events have also characterized previous deglaciations is not known. Arctic marine cores hint at megafloods prior to Oxygen Isotope Stage (OIS) 2, but the overprint of successive glaciations means that geomorphological traces of ancient floods remain scarce in Eurasia and North America. Here we present the first well-constrained terrestrial megaflood record to be linked with Arctic archives. Based on cosmogenic-nuclide exposure dating and optically stimulated luminescence dating applied to glacial-lake sediments, a 300-m deep bedrock spillway, and giant eddy-bars > 200-m high, we reconstruct a history of cataclysmic outburst floods from glacial Lake Vitim, Siberia, to the Arctic Ocean over the past 60,000-years. Three megafloods have reflected the rhythm of Eurasian glaciations, leaving traces that stretch more than 3500 km to the Lena Delta. The first flood was coincident with deglaciation from OIS-4 and the largest meltwater spike in Arctic marine-cores within the past 100,000 years (isotope-event 3.31 at 55.5 ka). The second flood marked the lead up to the local Last Glacial Maximum, and the third flood occurred during the last deglaciation. This final 3000 km3 megaflood stands as one of the largest freshwater floods ever documented, with peak discharge of 4.0–6.5 million m3s−1, mean flow depths of 120–150 m, and average flow velocities up to 21 m s−1. © 2018 Elsevier Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112230
Appears in Collections:气候减缓与适应

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作者单位: Department of Physical Geography, Stockholm University, Stockholm, SE-10691, Sweden; Department of Geoscience, Aarhus University, Høegh-Guldbergs Gade 2, Aarhus, 8000, Denmark; School of Earth & Environmental Sciences, University of Wollongong, Northfields Avenue, Wollongong, NSW 2522, Australia; Institute of Earth and Environmental Sciences, Albert-Ludwigs-Universität Freiburg, Albertstr. 23-B, Freiburg, 79104, Germany; Department of Geomorphology & Palaeogeography, Faculty of Geography, Lomonosov Moscow State University, Leninskie Gory, GSP-1, Moscow, 119991, Russian Federation; Australian Nuclear Science & Technology Organisation, New Illawarra Road, Lucas Heights, NSW 2234, Australia

Recommended Citation:
Margold M.,Jansen J.D.,Codilean A.T.,et al. Repeated megafloods from glacial Lake Vitim, Siberia, to the Arctic Ocean over the past 60,000 years[J]. Quaternary Science Reviews,2018-01-01,187
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