FN Archimer Export Format
PT J
TI Ice-shelf collapse from subsurface warming as a trigger for Heinrich events
BT 
AF MARCOTT, Shaun A.
   CLARK, Peter U.
   PADMAN, Laurie
   KLINKHAMMER, Gary P.
   SPRINGER, Scott R.
   LIU, Zhengyu
   OTTO-BLIESNER, Bette L.
   CARLSON, Anders E.
   UNGERER, Andy
   PADMAN, June
   HE, Feng
   CHENG, Jun
   SCHMITTNER, Andreas
AS 1:1;2:1;3:2;4:3;5:4;6:5,6;7:7;8:5,6,8;9:3;10:3;11:5,6;12:9;13:3;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;13:;
C1 Oregon State Univ, Dept Geosci, Corvallis, OR 97331 USA.
   Earth & Space Res, Corvallis, OR 97333 USA.
   Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
   Earth & Space Res, Seattle, WA 98121 USA.
   Univ Wisconsin, Ctr Climat Res, Madison, WI 53706 USA.
   Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI 53706 USA.
   Natl Ctr Atmospher Res, Climate & Global Dynam Div, Boulder, CO 80307 USA.
   Univ Wisconsin, Dept Geosci, Madison, WI 53706 USA.
   Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Nanjing 210044, Peoples R China.
C2 UNIV OREGON STATE, USA
   EARTH & SPACE RES, USA
   UNIV OREGON STATE, USA
   EARTH & SPACE RES, USA
   UNIV WISCONSIN, USA
   UNIV WISCONSIN, USA
   NCAR, USA
   UNIV WISCONSIN, USA
   NANJING UNIV INFORMAT SCI & TECHNOL, CHINA
IF 9.681
TC 240
UR https://archimer.ifremer.fr/doc/00227/33819/32479.pdf
   https://archimer.ifremer.fr/doc/00227/33819/32480.pdf
LA English
DT Article
CR IMAGES 1-MD101
BO Marion Dufresne
DE ;paleoceanography;paleoclimatology;abrupt climate change
AB Episodic iceberg-discharge events from the Hudson Strait Ice Stream (HSIS) of the Laurentide Ice Sheet, referred to as Heinrich events, are commonly attributed to internal ice-sheet instabilities, but their systematic occurrence at the culmination of a large reduction in the Atlantic meridional overturning circulation (AMOC) indicates a climate control. We report Mg/Ca data on benthic foraminifera from an intermediate-depth site in the northwest Atlantic and results from a climate-model simulation that reveal basin-wide subsurface warming at the same time as large reductions in the AMOC, with temperature increasing by approximately 2 C over a 1-2 kyr interval prior to a Heinrich event. In simulations with an ocean model coupled to a thermodynamically active ice shelf, the increase in subsurface temperature increases basal melt rate under an ice shelf fronting the HSIS by a factor of approximately 6. By analogy with recent observations in Antarctica, the resulting ice-shelf loss and attendant HSIS acceleration would produce a Heinrich event.
PY 2011
PD AUG
SO Proceedings Of The National Academy Of Sciences Of The United States Of America
SN 0027-8424
PU Natl Acad Sciences
VL 108
IS 33
UT 000293895100020
BP 13415
EP 13419
DI 10.1073/pnas.1104772108
ID 33819
ER

EF