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Causes, consequences and chronology of large-magnitude palaeoflows in Middle and Late Pleistocene river systems of northwest Europe

Lookup NU author(s): Dr Rob Westaway

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Abstract

This study examines the record of high-palaeoflow phases in river systems in northwest Europe, investigating their causes (whether due to 'unique' events, such as the formation of the Dover Strait, or as 'characteristic' consequences of climate change), examining their consequences with regard to landscape evolution and possible effects on climate, and determining the chronology of key events. Large-magnitude palaeoflows, more than an order-of-magnitude larger than present-day flood peaks, are shown to be characteristic of rivers in this region at particular times within the Pleistocene. These events, the most recent of which were during Heinrich events 2 and 1 at ~25 and ~17 ka, were evidently caused by the combined effects of glacial outwash, rainfall, snowmelt and melting of permafrost in some proportion. They released such large volumes of water that the thermohaline circulation of the Atlantic Ocean, and thus the climate, may well have been affected. These large-magnitude palaeoflows are thus a significant aspect of the Pleistocene Earth system that has hitherto gone unquantified. © 2010 John Wiley & Sons, Ltd.


Publication metadata

Author(s): Westaway R, Bridgland D

Publication type: Article

Publication status: Published

Journal: Earth Surface Processes and Landforms

Year: 2010

Volume: 35

Issue: 9

Pages: 1071-1094

Print publication date: 08/02/2010

ISSN (print): 0197-9337

ISSN (electronic): 1096-9837

Publisher: John Wiley & Sons Ltd.

URL: http://dx.doi.org/10.1002/esp.1968

DOI: 10.1002/esp.1968


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