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Be-10 ages from central east Greenland constrain the extent of the Greenland ice sheet during the Last Glacial Maximum

Håkansson, Lena LU ; Briner, J.; Alexanderson, Helena LU ; Aldahan, A. and Possnert, G. (2007) In Quaternary Science Reviews 26(19-21). p.2316-2321
Abstract
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 Be-10 ages from erratic boulders perched at 250 m a.s.l. on the Kap Brewster peninsula at the mouth of Scoresby Sund. The average Be-10 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... (More)
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 Be-10 ages from erratic boulders perched at 250 m a.s.l. on the Kap Brewster peninsula at the mouth of Scoresby Sund. The average Be-10 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. (C) 2007 Elsevier Ltd. All rights reserved. (Less)
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author
organization
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type
Contribution to journal
publication status
published
subject
keywords
EROSION, HISTORY, CONTINENTAL-MARGIN, SCORESBY SUND, ARCTIC CANADA, BAFFIN-ISLAND, PLEISTOCENE, LANDSCAPES, JAMESON LAND, PRESERVATION
in
Quaternary Science Reviews
volume
26
issue
19-21
pages
2316 - 2321
publisher
Elsevier
external identifiers
  • wos:000251922000002
  • scopus:36248987212
ISSN
0277-3791
DOI
10.1016/j.quascirev.2007.08.001
language
English
LU publication?
yes
id
497d2104-486a-47d5-b0a7-a67bf0dddb8c (old id 1416783)
date added to LUP
2009-06-16 13:01:21
date last changed
2017-01-01 05:04:33
@article{497d2104-486a-47d5-b0a7-a67bf0dddb8c,
  abstract     = {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 Be-10 ages from erratic boulders perched at 250 m a.s.l. on the Kap Brewster peninsula at the mouth of Scoresby Sund. The average Be-10 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. (C) 2007 Elsevier Ltd. All rights reserved.},
  author       = {Håkansson, Lena and Briner, J. and Alexanderson, Helena and Aldahan, A. and Possnert, G.},
  issn         = {0277-3791},
  keyword      = {EROSION,HISTORY,CONTINENTAL-MARGIN,SCORESBY SUND,ARCTIC CANADA,BAFFIN-ISLAND,PLEISTOCENE,LANDSCAPES,JAMESON LAND,PRESERVATION},
  language     = {eng},
  number       = {19-21},
  pages        = {2316--2321},
  publisher    = {Elsevier},
  series       = {Quaternary Science Reviews},
  title        = {Be-10 ages from central east Greenland constrain the extent of the Greenland ice sheet during the Last Glacial Maximum},
  url          = {http://dx.doi.org/10.1016/j.quascirev.2007.08.001},
  volume       = {26},
  year         = {2007},
}