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Arctic drainage of Laurentide Ice Sheet meltwater throughout the past 14,700 years

Earth Sciences

Arctic drainage of Laurentide Ice Sheet meltwater throughout the past 14,700 years

F. Süfke, M. Gutjahr, et al.

This research, conducted by Finn Süfke, Marcus Gutjahr, Lloyd D. Keigwin, Brendan Reilly, Liviu Giosan, and Jörg Lippold, uncovers the deglacial drainage chronology of the Laurentide Ice Sheet through an innovative analysis of Pb isotopes in Arctic sediments. Discover how continuous meltwater supply from the Mackenzie River has influenced Arctic dynamics since the Bølling-Allerød period.

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Playback language: English
Abstract
This study analyzes the authigenic Pb isotopic composition of sediments in front of the Arctic Mackenzie Delta to reconstruct the deglacial drainage chronology of the Laurentide Ice Sheet (LIS). Continuous meltwater supply to the Arctic via the Mackenzie River is revealed since the Bølling-Allerød, with the strongest Lake Agassiz outflow event observed near the Younger Dryas onset. The findings, in conjunction with other deglacial runoff records, provide a detailed reconstruction of LIS meltwater drainage.
Publisher
Communications Earth & Environment
Published On
Apr 25, 2022
Authors
Finn Süfke, Marcus Gutjahr, Lloyd D. Keigwin, Brendan Reilly, Liviu Giosan, Jörg Lippold
Tags
Arctic
Laurentide Ice Sheet
meltwater
sediments
Pb isotopes
deglacial drainage
Mackenzie River

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