FN Archimer Export Format
PT J
TI Variations of the Antarctic Circumpolar Current intensity during the past 500 ka
BT 
AF MAZAUD, A.
   MICHEL, Elisabeth
   DEWILDE, F.
   TURON, J. L.
AS 1:1;2:1;3:1;4:2;
FF 1:;2:;3:;4:;
C1 UVSQ, CNRS, CEA, Domaine CNRS,Lab Sci Climat & Environm, F-91198 Gif Sur Yvette, France.
   Univ Bordeaux 1, UMR 5805, F-33405 Talence, France.
C2 LSCE, FRANCE
   UNIV BORDEAUX, FRANCE
SI AUTRE
SE AUTRE
IF 3.368
TC 25
UR https://archimer.ifremer.fr/doc/00231/34190/32874.pdf
LA English
DT Article
CR MD 120 / ANTAUS
BO Marion Dufresne
DE ;Antarctic;current;past;cycles
AB We examine the past variations of the Antarctic Circumpolar Current (ACC) by using variations in size and abundance of the magnetic grains deposited by this current at a site east the Kerguelen-Crozet plateau. Core MD00-2375G was taken at a midlatitude site during the ANTAUS cruise conducted in 2000 by the French R/V Marion Dufresne. Marine isotope stages (MIS) down to MIS 13 are identified, and an age model is derived from a correlation to the ice core isotopic record obtained from EPICA in Antarctica. Continuous records of abundance and size of the magnetic grains were obtained using environmental magnetism methods. Results show a strong modulation of the ACC flow intensity in response to glacial and interglacial cycles. The low abundance and the small size of magnetic grains indicate that the ACC was weak during warm stages and strong during glacial epochs. A large modulation is also observed at the sub-stage scale during the interglacials. A minimum in concentration and grain size occurs at the onset of MIS 11. At the MIS 6-5, 10-9, and possibly 12-11 transitions, observed variations suggest a mechanism involving both rapid and progressive variations of the ACC flow at deglaciations.
PY 2010
PD AUG
SO Geochemistry Geophysics Geosystems
SN 1525-2027
PU Amer Geophysical Union
VL 11
IS 8 / Q08007
UT 000280717500001
BP 1
EP 10
DI 10.1029/2010GC003033
ID 34190
ER

EF