Holocene SST reconstructions from the southern Bay of Biscay

This paper documents the last 10 ka evolution of one of the key parameters of climate: sea-surface temperatures (SST) in the subpolar North Atlantic. We focus on the southern Bay of Biscay, a highly sensitive oceanographic area because of its strategic and nodal position regarding the dynamics of th...

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Bibliographic Details
Main Authors: Mary, Yannick, Eynaud, Frédérique, Colin, Christophe, Rossignol, Linda, Brocheray, Sandra, Mojtahid, Meryem, Garcia, Jennifer, Peral, Marion, Howa, Hélène, Zaragosi, Sebastien, Cremer, Michel
Format: Dataset
Language:English
Published: PANGAEA 2017
Subjects:
AGE
Bay of Biscay
Core
DEPTH
sediment/rock
top/min
Modern analog technique (MAT)
PP10-07
Sea surface temperature
annual mean
maximum
minimum
April-June
January-March
July-September
October-December
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.872166
https://doi.org/10.1594/PANGAEA.872166
Description
Summary:This paper documents the last 10 ka evolution of one of the key parameters of climate: sea-surface temperatures (SST) in the subpolar North Atlantic. We focus on the southern Bay of Biscay, a highly sensitive oceanographic area because of its strategic and nodal position regarding the dynamics of the North Atlantic subpolar and subtropical gyres. This site furthermore offers unique sedimentary environments characterized by exceptional accumulation rates, enabling the study of Holocene archives at (infra)centennial scales. Our results mainly derive from planktonic foraminiferal association analysis on two cores from the southern Landes plateau. These associations were used as quantitative tools (thanks to the Modern Analog Technique) to track past hydrographical changes. SST reconstructions were thus obtained at an unprecedented resolution and compared to a compilation of Holocene records from the northern North Atlantic. From this regional perspective are shown fundamental timing differences between the gyre dynamics, nuancing classical views of a simple meridional overturning cell.

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