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European Climatic Response to Millennial-Scale Changes in the Atmosphere–Ocean System during the Last Glacial Period

Published online by Cambridge University Press:  20 January 2017

Marı́a Fernanda Sánchez Goñi ,
Jean-Louis Turon ,
Frédérique Eynaud  and
Sandra Gendreau
Marı́a Fernanda Sánchez Goñi
Affiliation:
Département de Géologie et Océanographie, UMR CNRS 5805, Université Bordeaux I, Avenue des Facultés, 33405, Talence, France
Jean-Louis Turon
Affiliation:
Département de Géologie et Océanographie, UMR CNRS 5805, Université Bordeaux I, Avenue des Facultés, 33405, Talence, France
Frédérique Eynaud
Affiliation:
Département de Géologie et Océanographie, UMR CNRS 5805, Université Bordeaux I, Avenue des Facultés, 33405, Talence, France
Sandra Gendreau
Affiliation:
Département de Géologie et Océanographie, UMR CNRS 5805, Université Bordeaux I, Avenue des Facultés, 33405, Talence, France
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Abstract

Pollen, foraminifer, dinocyst, and coarse lithic high-resolution analyses and δ18O measurements have been carried out for the last-glacial section of marine core MD95-2042 located near the southwestern margin of the Iberian Peninsula. The pollen data indicate a high frequency of vegetational changes on the adjacent continent during this period, suggesting a climatic variability very similar to that of the Dansgaard-Oeschger cycles recorded by the Greenland ice cores. The detailed direct correlation of the terrestrial and marine proxy data from core MD95-2042 indicates a three-phase pattern of Heinrich events in land and ocean environments. The first and last phases of the H5 and H4 events are characterized by a mild and humid climate in southwestern Europe, probably associated with the European origin of the ice-rafted detritus. The middle phase exhibits a cold and dry climate in Iberia linked with the maximum input of ice-rafted detritus. This phase seems to correspond with the Laurentide ice-sheet surges. Between the Heinrich events, several cold and dry periods on land are correlated with stades of the Dansgaard-Oeschger cycles. The impact of the Dansgaard-Oeschger stades in southwestern Europe seems to be preferentially connected to the cold winter air masses reaching this mid-latitude region.

Keywords

last glaciationHeinrich eventsDansgaard-Oeschger cyclesIberian Peninsulapollenice-rafted detritusdinocystsforaminifers
Type
Research Article
Information
Quaternary Research , Volume 54 , Issue 3 , November 2000 , pp. 394 - 403
Copyright
University of Washington

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