New constraints on European glacial freshwater releases to the North Atlantic Ocean
| Type | Article | ||||||||
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| 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 Samuel 6, Turon Jean-Louis1, Auffret Gerard6 |
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| 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. |
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| 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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