Repeated megafloods from glacial Lake Vitim, Siberia, to the Arctic Ocean over the past 60,000 years

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dc.contributor.authorMargold, Men_AU
dc.contributor.authorJansen, JDen_AU
dc.contributor.authorCodilean, ATen_AU
dc.contributor.authorPreusser, Fen_AU
dc.contributor.authorGurinov, ALen_AU
dc.contributor.authorFujioka, Ten_AU
dc.contributor.authorFink, Den_AU
dc.date.accessioned2021-12-16T21:14:56Zen_AU
dc.date.available2021-12-16T21:14:56Zen_AU
dc.date.issued2018-05-01en_AU
dc.date.statistics2021-11-16en_AU
dc.description.abstractCataclysmic 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.en_AU
dc.identifier.citationMargold, M., Jansen, J. D., Codilean, A. T., Preusser, F., Gurinov, A. L., Fujioka, T., & Fink, D. (2018). Repeated megafloods from glacial Lake Vitim, Siberia, to the Arctic Ocean over the past 60,000 years. Quaternary Science Reviews, 187, 41-61, doi:10.1016/j.quascirev.2018.03.005en_AU
dc.identifier.issn0277-3791en_AU
dc.identifier.journaltitleQuaternary Science Reviewsen_AU
dc.identifier.pagination41-61en_AU
dc.identifier.urihttps://doi.org/10.1016/j.quascirev.2018.03.005en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12504en_AU
dc.identifier.volume187en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectSiberiaen_AU
dc.subjectArctic Oceanen_AU
dc.subjectLakesen_AU
dc.subjectGlaciersen_AU
dc.subjectFloodsen_AU
dc.subjectOxygen isotopesen_AU
dc.titleRepeated megafloods from glacial Lake Vitim, Siberia, to the Arctic Ocean over the past 60,000 yearsen_AU
dc.typeJournal Articleen_AU
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