FN Archimer Export Format
PT J
TI A 0.55-Ma paleotemperature record from the Subantarctic zone: Implications for Antarctic Circumpolar Current development
BT 
AF BECQUEY, S
   GERSONDE, R
AS 1:1;2:1;
FF 1:;2:;
C1 Alfred Wegener Inst Polar & Marine Res, D-27515 Bremerhaven, Germany.
C2 INST A WEGENER, GERMANY
IF 3.048
TC 61
UR https://archimer.ifremer.fr/doc/00224/33501/31947.pdf
LA English
DT Article
CR APSARA 4 - MD 56
   PACIMA - MD 79
BO Marion Dufresne
DE ;Subantarctic zone;sea surface temperatures;planktic foraminifers;ice rafted debris;climate
AB Estimates of summer sea surface temperatures (SSSTs) derived from planktic foraminiferal associations using the Modern Analog Technique and combined with isotopic analyses and determination of ice-rafted debris, mirror the Pleistocene evolution of the planktic Subantarctic surface waters in the Atlantic Ocean. The SSSTs indicate that the isotherms that define the modern polar front zone and Subantarctic front, were located at more northerly latitudes (up to 7degrees) during most of the investigated period, which covers the past 550 kyr. Exceptions are during climatic optima in the early Holocene, at marine isotope stages (MIS) 5.5, 7.1, 7.5, 9.3, and presumably during MIS 11.3 when SSSTs exceeded modern values by 1degrees-5degreesC. The close similarity between the SSST and the Vostok temperature indicates strong regional temperature correlation. Both records show that MIS 9.3 was the warmest period during the last 420 kyr whereas SSSTs obtained for MIS 11.3 are overestimated due to strong carbonate dissolution. Spectral analysis corroborates that the initiation of warming in southern high latitudes heralds the start of deglaciation on the Northern Hemisphere.
PY 2003
PD MAR
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 18
IS 1
UT 000182229400001
DI 10.1029/2000PA000576
ID 33501
ER

EF