FN Archimer Export Format
PT J
TI Deglacial development of (sub) sea surface temperature and salinity in the subarctic northwest Pacific: Implications for upper-ocean stratification
BT 
AF RIETHDORF, Jan-Rainer
   MAX, Lars
   NUERNBERG, Dirk
   LEMBKE-JENE, Lester
   TIEDEMANN, Ralf
AS 1:1,3;2:2;3:1;4:2;5:2;
FF 1:;2:;3:;4:;5:;
C1 Helmholtz Centre for Ocean Research Kiel (GEOMAR), Kiel, Germany
   Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
   Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Chiba, Japan.
C2 GEOMAR, GERMANY
   INST A WEGENER, GERMANY
   UNIV TOKYO, JAPAN
IF 3.918
TC 45
UR https://archimer.ifremer.fr/doc/00262/37307/35719.pdf
LA English
DT Article
CR MD 122 / WEPAMA
BO Marion Dufresne
AB Based on models and proxy data, it has been proposed that salinity-driven stratification weakened in the subarctic North Pacific during the last deglaciation, which potentially contributed to the deglacial rise in atmospheric carbon dioxide. We present high-resolution subsurface temperature (T-Mg/Ca) and subsurface salinity-approximating (delta O-18(ivc-sw)) records across the last 20,000 years from the subarctic North Pacific and its marginal seas, derived from combined stable oxygen isotopes and Mg/Ca ratios of the planktonic foraminiferal species Neogloboquadrina pachyderma (sin.). Our results indicate regionally differing changes of subsurface conditions. During the Heinrich Stadial 1 and the Younger Dryas cold phases, our sites were subject to reduced thermal stratification, brine rejection due to sea-ice formation, and increased advection of low-salinity water from the Alaskan Stream. In contrast, the Bolling-Allerod warm phase was characterized by strengthened thermal stratification, stronger sea-ice melting, and influence of surface waters that were less diluted by the Alaskan Stream. From direct comparison with alkenone-based sea surface temperature estimates (SSTUk'37), we suggest deglacial thermocline changes that were closely related to changes in seasonal contrasts and stratification of the mixed layer. The modern upper-ocean conditions seem to have developed only since the early Holocene.
PY 2013
SO Paleoceanography
SN 0883-8305
PU American Geophysical Union
VL 28
IS 1
UT 000317838200009
BP 91
EP 104
DI 10.1002/palo.20014
ID 37307
ER

EF