FN Archimer Export Format
PT J
TI The timing of deglacial circulation changes in the Atlantic
BT 
AF WAELBROECK, C.
   SKINNER, L. C.
   LABEYRIE, L.
   DUPLESSY, J. -C.
   MICHEL, E.
   VAZQUEZ RIVEIROS, Natalia
   GHERARDI, J. M.
   DEWILDE, F.
AS 1:1;2:2;3:1;4:1;5:1;6:1;7:1,3;8:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 UVSQ, LSCE IPSL, Lab CNRS, CEA,Domaine CNRS, F-91198 Gif Sur Yvette, France.
   Univ Cambridge, Godwin Lab Paleoclimate Res, Cambridge CB2 3EQ, England.
   Bjerknes Ctr Climate Res, N-5007 Bergen, Norway.
C2 UNIV VERSAILLES, FRANCE
   UNIV CAMBRIDGE, UK
   BCCR, NORWAY
IF 3.357
TC 79
UR https://archimer.ifremer.fr/doc/00214/32517/31003.pdf
LA English
DT Article
CR IMAGES 1-MD101
   IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   MD 158 / LOG IPEV 2007
   VT 90 / SOUC
BO Marion Dufresne
DE ;Atlantic Ocean;benthic oxygen isotope;last deglaciation;ocean circulation
AB Well-dated benthic foraminifer oxygen isotopic records (delta O-18) from different water depths and locations within the Atlantic Ocean exhibit distinct patterns and significant differences in timing over the last deglaciation. This has two implications: on the one hand, it confirms that benthic delta O-18 cannot be used as a global correlation tool with millennial-scale precision, but on the other hand, the combination of benthic isotopic records with independent dating provides a wealth of information on past circulation changes. Comparing new South Atlantic benthic isotopic data with published benthic isotopic records, we show that (1) circulation changes first affected benthic delta O-18 in the 1000-2200 m range, with marked decreases in benthic delta O-18 taking place at similar to 17.5 cal. kyr B.P. (ka) due to the southward propagation of brine waters generated in the Nordic Seas during Heinrich Stadial 1 (HS1) cold period; (2) the arrival of delta O-18-depleted deglacial meltwater took place later at deeper North Atlantic sites; (3) hydrographic changes recorded in North Atlantic cores below 3000 m during HS1 do not correspond to simple alternations between northern-and southern-sourced water but likely reflect instead the incursion of brine-generated deep water of northern as well as southern origin; and (4) South Atlantic waters at similar to 44 degrees S and similar to 3800 m depth remained isolated from better-ventilated northern-sourced water masses until after the resumption of North Atlantic Deep Water (NADW) formation at the onset of the Bolling-Allerod, which led to the propagation of NADW into the South Atlantic.
PY 2011
PD AUG
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 26
IS PA3213
UT 000294129100001
BP 1
EP 10
DI 10.1029/2010PA002007
ID 32517
ER

EF