FN Archimer Export Format
PT J
TI Sea surface temperatures of southern midlatitudes 0-160 kyr BP
BT 
AF PAHNKE, K
   SACHS, JP
AS 1:1;2:1;
FF 1:;2:;
C1 MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA.
C2 MIT, USA
IF 3.018
TC 131
UR https://archimer.ifremer.fr/doc/00234/34574/33121.pdf
LA English
DT Article
CR IMAGES 1-MD101
   IMAGES 3-IPHIS-MD106
   SEYMAMA - MD 65
BO Marion Dufresne
DE ;sea surface temperature;alkenone;midsouthern latitudes
AB Late Quaternary climate fluctuated between extremes of glaciations, lasting similar to 90 kyr on average, and interglacial episodes, lasting similar to 10 kyr. Still largely unknown are the spatial and temporal evolution of these global climate states, with vigorous debate still underway on the mechanisms responsible for glacial inceptions and terminations. Though it is widely believed that the Southern Hemisphere oceans play a central role in global climate changes, few paleoclimate records exist from there. Here we present three new alkenone-derived SST records from the midlatitude Southern Hemisphere spanning the last 160 kyr, a full glacial-interglacial cycle. Our subtropical SST records from the last glacial period are characterized by ( 1) warming 47 - 23 kyr B. P., when high latitudes in both hemispheres cooled, and ( 2) milder temperatures during the penultimate glacial period than during the last glacial interval. These SST features are found to be of tropical- to subtropical-wide extent, implying increased thermal gradients at times of high-latitude ice sheet growth. This has implications for the vigor of atmospheric and upper ocean circulation and the transport of heat and moisture to the poles that may have been instrumental in the growth and maintenance of polar ice sheets during glacial periods.
PY 2006
PD APR
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 21
IS 2 / PA2003
UT 000237284700001
BP 1
EP 17
DI 10.1029/2005PA001191
ID 34574
ER

EF