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  Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse

Lochte, A. A., Repschläger, J., Kienast, M., Garbe-Schoenberg, D., Andersen, N., Hamann, C., et al. (2019). Labrador Sea freshening at 8.5 ka BP caused by Hudson Bay Ice Saddle collapse. Nature Communications, 10: 586. doi:10.1038/s41467-019-08408-6.

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Lochte, Annalena Antonia1, Author
Repschläger, Janne2, Author              
Kienast, Markus1, Author
Garbe-Schoenberg, Dieter1, Author
Andersen, Nils1, Author
Hamann, Christian1, Author
Schneider, Ralph1, Author
Affiliations:
1external, ou_persistent22              
2Climate Geochemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_2237635              

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 Abstract: A significant reduction in the Atlantic Meridional Overturning Circulation and rapid northern Hemisphere cooling 8200 years ago have been linked to the final melting of the Laurentide Ice Sheet. Although many studies associated this cold event with the drainage of Lake Agassiz-Ojibway, recent model simulations have shown that the Hudson Bay Ice Saddle collapse would have had much larger effects on the Atlantic Meridional Overturning Circulation than the lake outburst itself. Based on a combination of Mg/Ca and oxygen isotope ratios of benthic foraminifera, this study presents the first direct evidence of a major Labrador shelfwater freshening at 8.5 ka BP, which we associate with the Hudson Bay Ice Saddle collapse. The freshening is preceded by a subsurface warming of the western Labrador Sea, which we link to the strengthening of the West Greenland Current that could concurrently have accelerated the ice saddle collapse in Hudson Bay.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published online
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Title: Nature Communications
  Abbreviation : Nat. Commun.
Source Genre: Journal
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Publ. Info: London : Nature Publishing Group
Pages: - Volume / Issue: 10 Sequence Number: 586 Start / End Page: - Identifier: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723