FN Archimer Export Format
PT J
TI Freshwater impacts recorded in tetraunsaturated alkenones and alkenone sea surface temperatures from the Okhotsk Sea across millennial-scale cycles
BT 
AF HARADA, Naomi
   SATO, Miyako
   SAKAMOTO, Tatsuhiko
AS 1:1;2:1;3:2;
FF 1:;2:;3:;
C1 Japan Agcy Marine Earth Sci & Technol, Inst Observat Res Global Change, Yokosuka, Kanagawa, Japan.
   Japan Agcy Marine Earth Sci & Technol, Inst Res Earth Evolut, Yokosuka, Kanagawa, Japan.
C2 JAMSTEC, JAPAN
   JAMSTEC, JAPAN
IF 3.626
TC 39
UR https://archimer.ifremer.fr/doc/00237/34826/33302.pdf
LA English
DT Article
CR MD 122 / WEPAMA
BO Marion Dufresne
AB [1] We present records of phytoplankton-produced alkenones down a long piston core, which reveal changes of sea surface temperature (SST) and sea surface salinity (SSS) in the southwestern Okhotsk Sea over the past 120 ka. Between 20 and 60 ka B. P., alkenone-derived temperatures typically increased by 6 degrees C-8 degrees C from periods corresponding, within a few hundred years, to stadials to those corresponding to interstadials recorded in Greenland ice cores. The abundance of C-37:4 alkenone relative to total C37 alkenones (percent C-37:4), a possible proxy for salinity, indicated that during most low SSS was associated with high SST. The warm freshwater events might be related to ( 1) a decline in the supply of saline water entering the Okhotsk Sea through the Soya Strait; ( 2) strengthening of the freshwater supply from the Amur River and precipitation over the Okhotsk Sea, associated mainly with increased Asian summer monsoon activity; and ( 3) the effect of melting sea ice. These findings increase our understanding of the close linkage between high and low latitudes in relation to climate change and the synchronicity of climate changes within a few centuries between the Pacific and the Atlantic sides of the Northern Hemisphere.
PY 2008
PD JUN
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 23
IS 3 / PA3201
UT 000257434600001
BP 1
EP 14
DI 10.1029/2006PA001410
ID 34826
ER

EF