FN Archimer Export Format
PT J
TI Quantification of factors impacting seawater and calcite delta O-18 during Heinrich Stadials 1 and 4
BT 
AF BAGNIEWSKI, Witold
   MEISSNER, Katrin J.
   MENVIEL, Laurie
   BRENNAN, Catherine E.
AS 1:1,2;2:1,2;3:1,2;4:3;
FF 1:;2:;3:;4:;
C1 Univ New S Wales, Climate Change Res Ctr, Sydney, NSW, Australia.
   Univ New S Wales, ARC Ctr Excellence Climate Syst Sci, Sydney, NSW, Australia.
   Dalhousie Univ, Dept Oceanog, Halifax, NS, Canada.
C2 UNIV NEW S WALES, AUSTRALIA
   UNIV NEW S WALES, AUSTRALIA
   UNIV DALHOUSIE, CANADA
IF 3.433
TC 9
UR https://archimer.ifremer.fr/doc/00351/46253/46085.pdf
   https://archimer.ifremer.fr/doc/00351/46253/46086.txt
   https://archimer.ifremer.fr/doc/00351/46253/46087.eps
   https://archimer.ifremer.fr/doc/00351/46253/46088.eps
   https://archimer.ifremer.fr/doc/00351/46253/46089.eps
   https://archimer.ifremer.fr/doc/00351/46253/46090.eps
   https://archimer.ifremer.fr/doc/00351/46253/46091.eps
   https://archimer.ifremer.fr/doc/00351/46253/46092.eps
   https://archimer.ifremer.fr/doc/00351/46253/46093.eps
   https://archimer.ifremer.fr/doc/00351/46253/46094.eps
   https://archimer.ifremer.fr/doc/00351/46253/46095.tex
LA English
DT Article
CR IMAGES 1-MD101
   IMAGES V LEG 1-MD114
   IMAGES V LEG 4-MD114
   MD 126 / MONA
BO Marion Dufresne
AB We perform idealized experiments of a Heinrich Stadial using an oxygen-isotope-enabled Earth System Climate Model. Our results compare relatively well with the planktic and benthic delta O-18 records of Heinrich Stadials 1 and 4. We find that changes in surface delta O-18(c) can be equally attributed to the "temperature effect" due to fractionation during calcification; the "circulation and climate effect" due to changes in circulation, precipitation, and evaporation; and the "meltwater effect" due to the addition and subsequent advection of depleted fresh water from continental ice sheets. In contrast, the meltwater effect and circulation and climate effect have only a small impact on benthic delta O-18(c) during the cessation of the Atlantic Meridional Overturning Circulation (AMOC). Significant temperature changes simulated in both the deep Atlantic and Pacific Oceans substantially influence benthic delta 18O(c) during that time. During the AMOC recovery, however, anomalously low delta O-18(w) surface waters are advected to the deep Atlantic, thus generating a large (similar to 0.5 parts per thousand) delta O-18(c) decrease in the deep North Atlantic. This is in contrast to a hypothesis that links such depletion seen in Atlantic sediment cores during the last glacial stadials to deepwater formation caused by brine rejection and sea ice formation.
PY 2015
PD JUN
SO Paleoceanography
SN 0883-8305
PU Amer Geophysical Union
VL 30
IS 7
UT 000360058100006
BP 895
EP 911
DI 10.1002/2014PA002751
ID 46253
ER

EF