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Contamination of 8.2 ka cold climate records by the Storegga tsunami in the Nordic Seas

Earth Sciences

Contamination of 8.2 ka cold climate records by the Storegga tsunami in the Nordic Seas

S. Bondevik, B. Risebrobakken, et al.

Discover how researchers Stein Bondevik, Bjørg Risebrobakken, Steven J. Gibbons, Tine L. Rasmussen, and Finn Løvholt unveil the surprising effects of the Storegga tsunami on ancient climate records. Their groundbreaking study re-evaluates sediment cores and reveals the true age of cold-water foraminifera, challenging long-held climate interpretations.

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Playback language: English
Abstract
This paper investigates the potential contamination of 8200-year BP cooling event records from Norwegian and North Sea sediments by the Storegga tsunami. The authors simulate tsunami flow velocities and re-investigate sediment core MD95-2011, finding that the cold-water foraminifera in the 8.2 ka layer are redeposited and much older than previously assumed. The study concludes that the Storegga tsunami significantly reworked seafloor sediments, potentially affecting climate interpretations based on these records.
Publisher
Nature Communications
Published On
Apr 04, 2024
Authors
Stein Bondevik, Bjørg Risebrobakken, Steven J. Gibbons, Tine L. Rasmussen, Finn Løvholt
Tags
Storegga tsunami
8200-year BP cooling event
Norwegian sediments
climate interpretation
sediment core MD95-2011
foraminifera
tsunami flow velocities

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