FN Archimer Export Format
PT J
TI The importance of Canadian Arctic Archipelago gateways for glacial expansion in Scandinavia
BT 
AF Lofverstrom, Marcus
   Thompson, Diane M.
   Otto-Bliesner, Bette L.
   Brady, Esther C.
AS 1:1;2:1;3:2;4:2;
FF 1:;2:;3:;4:;
C1 Department of Geosciences, University of Arizona, Tucson, AZ, USA
   Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, USA
C2 UNIV ARIZONA, USA
   NCAR, USA
IF 18.3
TC 7
UR https://archimer.ifremer.fr/doc/00776/88840/94470.pdf
LA English
DT Article
CR IMAGES 1-MD101
   MD 114 / IMAGES V GINNA
BO Marion Dufresne
AB The last glacial cycle began around 116,000 years before present during a period with low incoming solar radiation in Northern Hemisphere summer. Following the glacial inception in North America, the marine sediment record depicts a weakening of the high-latitude ocean overturning circulation and a multi-millennial eastward progression of glaciation across the North Atlantic basin. Modelling studies have shown that reduced solar radiation can initiate inception in North America and Siberia; however, the proximity to the temperate North Atlantic typically precludes ice growth in Scandinavia. Using a coupled Earth-system–ice-sheet model, we show that ice forming in North America may help facilitate glacial expansion in Scandinavia. As large coherent ice masses form and start filling the ocean gateways in the Canadian Archipelago, the transport of comparatively fresh North Pacific and Arctic water through the archipelago is diverted east of Greenland, resulting in a freshening of North Atlantic deep convection regions, sea-ice expansion and a substantial cooling that is sufficient to trigger glacial inception in Scandinavia. This mechanism may also help explain the Younger Dryas cold reversal and the rapid regrowth of the Scandinavian Ice Sheet following several warm events in the last glacial period. 
PY 2022
PD JUL
SO Nature Geoscience
SN 1752-0894
PU Springer Science and Business Media LLC
VL 15
IS 6
UT 000808445400003
BP 482
EP 488
DI 10.1038/s41561-022-00956-9
ID 88840
ER

EF