TY - JOUR
T1 - 10Be ages from central east Greenland constrain the extent of the Greenland ice sheet during the Last Glacial Maximum
AU - Håkansson, Lena
AU - Briner, Jason
AU - Alexanderson, Helena
AU - Aldahan, Ala
AU - Possnert, Göran
N1 - Funding Information:
The fieldwork was funded by the Helge Axson Johnson Foundation and the Swedish Association for Anthropology and Geography (SSAG). The Danish Polar Centre and the Swedish Polar Research Secretariat provided logistic support. Christian Hjort is acknowledged for valuable discussions. We also wish to thank Jon Landvik and an anonymous reviewer for helpful comments and suggestions on the manuscript.
PY - 2007/10
Y1 - 2007/10
N2 - Traditional ice sheet reconstructions have suggested two distinctly different ice sheet regimes along the East Greenland continental margin during the Last Glacial Maximum (LGM): ice to the shelf break south of Scoresby Sund and ice extending no further than to the inner shelf at and north of Scoresby Sund. We report new 10Be ages from erratic boulders perched at 250 m a.s.l. on the Kap Brewster peninsula at the mouth of Scoresby Sund. The average 10Be ages, calculated with an assumed maximum erosion rate of 1 cm/ka and no erosion (respectively, 17.3±2.3 ka and 15.1±1.7 ka) overlap with a period of increased sediment input to the Scoresby Sund fan (19-15 ka). The results presented here suggest that ice reached at least 250 m a.s.l. at the mouth of Scoresby Sund during the LGM and add to a growing body of evidence indicating that LGM ice extended onto the outer shelf in northeast Greenland.
AB - Traditional ice sheet reconstructions have suggested two distinctly different ice sheet regimes along the East Greenland continental margin during the Last Glacial Maximum (LGM): ice to the shelf break south of Scoresby Sund and ice extending no further than to the inner shelf at and north of Scoresby Sund. We report new 10Be ages from erratic boulders perched at 250 m a.s.l. on the Kap Brewster peninsula at the mouth of Scoresby Sund. The average 10Be ages, calculated with an assumed maximum erosion rate of 1 cm/ka and no erosion (respectively, 17.3±2.3 ka and 15.1±1.7 ka) overlap with a period of increased sediment input to the Scoresby Sund fan (19-15 ka). The results presented here suggest that ice reached at least 250 m a.s.l. at the mouth of Scoresby Sund during the LGM and add to a growing body of evidence indicating that LGM ice extended onto the outer shelf in northeast Greenland.
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U2 - 10.1016/j.quascirev.2007.08.001
DO - 10.1016/j.quascirev.2007.08.001
M3 - Article
AN - SCOPUS:36248987212
SN - 0277-3791
VL - 26
SP - 2316
EP - 2321
JO - Quaternary Science Reviews
JF - Quaternary Science Reviews
IS - 19-21
ER -