FN Archimer Export Format
PT J
TI Position of the Polar Front along the western Iberian margin during key cold episodes of the last 45 ka
BT 
AF EYNAUD, Frederique
   DE ABREU, Lucia
   VOELKER, Antje
   SCHOENFELD, Joachim
   SALGUEIRO, Emilia
   TURON, Jean-Louis
   PENAUD, Aurelie
   TOUCANNE, Samuel
   NAUGHTON, Filipa
   GONI, Maria Fernanda Sanchez
   MALAIZE, Bruno
   CACHO, Isabel
AS 1:1;2:2,3;3:2,3;4:4;5:2,3;6:1;7:1;8:1;9:2;10:1;11:1;12:5;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;
C1 Univ Bordeaux 1, EPOC, UMR 5805, F-33405 Talence, France.
   LNEG, Dept Geol Marinha, P-2721866 Zambujal, Portugal.
   CIMAR Associate Lab, P-4050123 Oporto, Portugal.
   Univ Kiel, Leibniz Inst Marine Sci, IFM, GEOMAR, D-24148 Kiel, Germany.
   Univ Barcelona, Fac Geol, Dept Estratig Paleontol & Geociencies Marines, E-08028 Barcelona, Spain.
C2 UNIV BORDEAUX, FRANCE
   LNEG, PORTUGAL
   UNIV PORTO, PORTUGAL
   GEOMAR, GERMANY
   UNIV BARCELONA, SPAIN
IF 2.626
TC 160
UR https://archimer.ifremer.fr/doc/00218/32909/31415.pdf
LA English
DT Article
CR IMAGES 1-MD101
   IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   MD 123 / GEOSCIENCES 1
   MD 134 / PICABIA
BO Marion Dufresne
DE ;Polar Front;LGM;Heinrich events
AB This paper documents the migration of the Polar Front (PF) over the Iberian margin during some of the cold climatic extremes of the last 45 ka. It is based on a compilation of robust and coherent paleohydrological proxies obtained from eleven cores distributed between 36 and 42 degrees N. Planktonic delta O-18 (Globigerina bulloides), ice-rafted detritus concentrations, and the relative abundance of the polar foraminifera Neogloboquadrina pachyderma sinistral were used to track the PF position. These three data sets, compared from core to core, show a consistent evolution of the sea surface paleohydrology along the Iberian margin over the last 45 ka. We focused on five time slices representative of cold periods under distinct paleoenvironmental forcings: the 8.2 ka event and the Younger Dryas (two recent cold events occurring within high values of summer insolation), Heinrich events 1 and 4 (reflecting major episodes of massive iceberg discharges into the North Atlantic), and the Last Glacial Maximum (typifying the highest ice volume accumulated in the Northern Hemisphere). For each event, we generated schematic maps mirroring past sea surface hydrological conditions. The maps revealed that the Polar Front presence along the Iberian margin was restricted to Heinrich events. The sea surface conditions during the Last Glacial Maximum were close to those at present day, except for the northern sites which briefly experienced subarctic conditions.
PY 2009
PD JUN
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 10
IS 7
UT 000267637900002
BP 1
EP 21
DI 10.1029/2009GC002398
ID 32909
ER

EF