FN Archimer Export Format
PT J
TI Changes in Holocene meridional circulation and poleward Atlantic flow: the Bay of Biscay as a nodal point
BT 
AF MARY, Yannick
   EYNAUD, Frederique
   COLIN, Christophe
   ROSSIGNOL, Linda
   BROCHERAY, Sandra
   MOJTAHID, Meryem
   GARCIA, Jennifer
   PERAL, Marion
   HOWA, Helene
   ZARAGOSI, Sebastien
   CREMER, Michel
AS 1:1;2:1;3:2;4:1;5:1;6:3;7:3;8:1;9:3;10:1;11:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;
C1 Univ Bordeaux, UMR 5805, Lab Environnements & Paleoenvironnements Ocean, F-33615 Pessac, France.
   Univ Paris 11, Lab Geosci, F-91405 Orsay, France.
   Univ Angers, UMR CNRS6112 LPG BIAF, Recent & Fossil Bio Indicators, 2 Bd Lavoisier, F-49045 Angers 01, France.
C2 UNIV BORDEAUX, FRANCE
   UNIV PARIS 11, FRANCE
   UNIV ANGERS, FRANCE
IN DOAJ
IF 3.174
TC 23
UR https://archimer.ifremer.fr/doc/00420/53177/55077.pdf
   https://archimer.ifremer.fr/doc/00420/53177/55078.pdf
LA English
DT Article
CR IMAGES 1-MD101
   IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   MD 123 / GEOSCIENCES 1
   MD 133 / SEDICAR
   SARGASS
BO Marion Dufresne
   Pourquoi pas ?
AB This paper documents the evolution over the last 10 kyr of one of the key parameters of climate: sea-surface temperatures (SSTs) in the North Atlantic. We focus on the southern Bay of Biscay, a highly sensitive oceanographic area regarding the dynamics of the North Atlantic subpolar and subtropical gyres (SPG and STG respectively). 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 are used as the basis of modern analogue technique transfer functions to track past hydrographical changes. SST reconstructions were thus obtained at an exceptional resolution and compared to a compilation of Holocene records from the northeastern North Atlantic. From this regional perspective are shown fundamental timing differences between the gyre dynamics, nuancing classical views of a simple meridional overturning cell. Our study highlights that western Europe underwent significant oscillations of (annual) SST during the last 10 kyr. During well-known intervals of mild boreal climate, warm shifts of more than 3 ffi C per century are accurately concomitant with positive sea-surface temperature anomalies and rise of micropalaeontological indicators of gyre dynamics in the northern North Atlantic, pointing to periods of greater intensity of the North Atlantic Current (SPG cell especially). Conversely, the SST signal records short-term cold anomalies which could be related to weaker SPG dynamics. 
PY 2017
PD MAR
SO Climate Of The Past
SN 1814-9324
PU Copernicus Gesellschaft Mbh
VL 13
UT 000396733000001
BP 201
EP 216
DI 10.5194/cp-13-201-2017
ID 53177
ER

EF