New constraints on European glacial freshwater releases to the North Atlantic Ocean

Type Article
Date 2012-08
Language English
Author(s) Eynaud Frederique1, Malaize Bruno1, Zaragosi Sebastien1, de Vernal Anne2, Scourse James3, Pujol Claude1, Cortijo Elsa4, Grousset Francis E.1, Penaud Aurelie5, Toucanne SamuelORCID6, Turon Jean-Louis1, Auffret Gerard6
Affiliation(s) 1 : Univ Bordeaux 1, EPOC, UMR 5805, F-33400 Talence, France.
2 : GEOTOP, Montreal, PQ, Canada.
3 : Bangor Univ, Sch Ocean Sci, Coll Nat Sci, Bangor, Anglesey, Wales.
4 : Lab Sci Climat & Environm, Gif Sur Yvette, France.
5 : IUEM UBO, Domaines Ocean, UMR 6538, Plouzane, France.
6 : IFREMER, Lab Environm Sedimentaires, Plouzane, France.
Source Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2012-08 , Vol. 39 , P. -
DOI 10.1029/2012GL052100
WOS© Times Cited 23
Abstract During the late Quaternary, both external and internal forcings have driven major climatic shifts from glacial to interglacial conditions. Nonlinear climatic steps characterized the transitions leading to these extrema, with intermediate excursions particularly well expressed in the dynamics of the Northern Hemisphere cryosphere. Here we document the impact of these dynamics on the north-eastern North Atlantic Ocean, focussing on the 35-10 ka interval. Sea-surface salinities have been reconstructed quantitatively based on two independent methods from core MD95-2002, recovered from the northern Bay of Biscay adjacent to the axis of the Manche paleoriver outlet and thus in connection with proximal European ice sheets and glaciers. Quantitative reconstructions deriving from dinocyst and planktonic foraminiferal analyses have been combined within a robust chronology to assess the amplitude and timing of hydrological changes in this region. Our study evidences strong pulsed freshwater discharges which may have impacted the North Atlantic Meridional Overturning Circulation.
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Eynaud Frederique, Malaize Bruno, Zaragosi Sebastien, de Vernal Anne, Scourse James, Pujol Claude, Cortijo Elsa, Grousset Francis E., Penaud Aurelie, Toucanne Samuel, Turon Jean-Louis, Auffret Gerard (2012). New constraints on European glacial freshwater releases to the North Atlantic Ocean. Geophysical Research Letters, 39, -. Publisher's official version : , Open Access version :