FN Archimer Export Format
PT J
TI Evidence for northward expansion of Antarctic Bottom Water mass in the Southern Ocean during the last glacial inception
BT 
AF GOVIN, Aline
   MICHEL, Elisabeth
   LABEYRIE, Laurent
   WAELBROECK, Claire
   DEWILDE, Fabien
   JANSEN, Eystein
AS 1:1,2;2:1;3:1;4:1;5:1;6:2;
FF 1:;2:;3:;4:;5:;6:;
C1 UVSQ, CEA, CNRS, LSCE,IPSL, F-91190 Gif Sur Yvette, France.
   Univ Bergen, Bjerknes Ctr Climate Res, N-5007 Bergen, Norway.
C2 UNIV VERSAILLES, FRANCE
   UNIV BERGEN, NORWAY
IF 3.644
TC 73
UR https://archimer.ifremer.fr/doc/00208/31952/30375.pdf
LA English
DT Article
CR APSARA 4 - MD 56
   CIVA 2 - MD 103
   IMAGES 3-IPHIS-MD106
   MD 120 / ANTAUS
   MD 125 / SWIFT BIS-CARHOT
   MD 128 / SWAF
   PACIMA - MD 79
BO Marion Dufresne
DE ;isotope substage 5E;ice core;interglacial period;climate variability;deep ocean;Atlantic;sea;circulation;temperature;hemisphere
AB We investigated deep water changes in the Southern Ocean during the last glacial inception, in relationship to surface hydrology and global climatology, to better understand the mechanisms of the establishment of a glacial ocean circulation. Changes in benthic foraminiferal delta(13)C from three high-resolution cores are compared and indicate decoupled intermediate and deep water changes in the Southern Ocean. From the comparison with records from the North Atlantic, South Atlantic, and the Southern Ocean, we show that the early southern deep water delta(13)C drop observed at the MIS 5.5-5.4 transition occurred before any significant reduction of North Atlantic Deep Water ventilation. We propose that this drop is linked to the northward expansion of poorly ventilated Antarctic Bottom Water (AABW) mass in the Southern Ocean. Associated with an early cooling in the high southern latitudes, the westerly winds and surface oceanic fronts would migrate equatorward, thus weakening the upwelling of Circumpolar Deep Waters. Reduced heat brought to Antarctic surface waters would enhance sea ice formation during winters and the deep convection of cold and poorly ventilated AABW.
PY 2009
PD JAN
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 24
IS PA1202
UT 000262754500001
BP 1
EP 14
DI 10.1029/2008PA001603
ID 31952
ER

EF