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Investigating the last deglaciation of the Scandinavian Ice Sheet in southwest Sweden with Be-10 exposure dating

Larsen, Nicolaj Krog; Linge, Henriette; Håkansson, Lena LU and Fabel, Derek (2012) In Journal of Quaternary Science 27(2). p.211-220
Abstract
In this study we have obtained 17 cosmogenic exposure ages from three well-developed moraine systems - Halland Coastal Moraines (HCM), Goteborg Moraine (GM) and Levene Moraine (LM) - which were formed during the last deglaciation in southwest Sweden by the Scandinavian Ice Sheet (SIS). The inferred ages of the inner HCM, GM and LM are 16.7 +/- 1.6, 16.1 +/- 1.4 and 13.6 +/- 1.4 ka, respectively, which is slightly older than previous estimates of the deglaciation based on the minimum limiting radiocarbon ages and pollen stratigraphy. During this short interval from 16.7 +/- 1.6 to 13.6 +/- 1.4 ka a large part (100-125 km) of the marine-based sector of the SIS in southwest Sweden was deglaciated, giving an average ice margin retreat between... (More)
In this study we have obtained 17 cosmogenic exposure ages from three well-developed moraine systems - Halland Coastal Moraines (HCM), Goteborg Moraine (GM) and Levene Moraine (LM) - which were formed during the last deglaciation in southwest Sweden by the Scandinavian Ice Sheet (SIS). The inferred ages of the inner HCM, GM and LM are 16.7 +/- 1.6, 16.1 +/- 1.4 and 13.6 +/- 1.4 ka, respectively, which is slightly older than previous estimates of the deglaciation based on the minimum limiting radiocarbon ages and pollen stratigraphy. During this short interval from 16.7 +/- 1.6 to 13.6 +/- 1.4 ka a large part (100-125 km) of the marine-based sector of the SIS in southwest Sweden was deglaciated, giving an average ice margin retreat between 20 to 50 m a(-1). The inception of the deglaciation pre-dated the Bolling/Allerod warming, the rapid sea level rise at 14.6 cal. ka BP and the first inflow of warm Atlantic waters into Skagerrak. We suggest that ice retreat in southwest Sweden is mainly a dynamical response governed by the disintegration of the Norwegian Channel Ice Stream and not primarily driven by climatic changes. Copyright (c) 2011 John Wiley & Sons, Ltd. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Scandinavian Ice Sheet, last deglaciation, cosmogenic nuclide surface, exposure dating
in
Journal of Quaternary Science
volume
27
issue
2
pages
211 - 220
publisher
John Wiley & Sons
external identifiers
  • wos:000303057300010
  • scopus:84856775795
ISSN
1099-1417
DOI
10.1002/jqs.1536
language
English
LU publication?
yes
id
0bb6cbdc-1224-4e36-aa74-5c8481aa064b (old id 2570778)
date added to LUP
2012-06-01 14:33:05
date last changed
2017-10-22 04:04:37
@article{0bb6cbdc-1224-4e36-aa74-5c8481aa064b,
  abstract     = {In this study we have obtained 17 cosmogenic exposure ages from three well-developed moraine systems - Halland Coastal Moraines (HCM), Goteborg Moraine (GM) and Levene Moraine (LM) - which were formed during the last deglaciation in southwest Sweden by the Scandinavian Ice Sheet (SIS). The inferred ages of the inner HCM, GM and LM are 16.7 +/- 1.6, 16.1 +/- 1.4 and 13.6 +/- 1.4 ka, respectively, which is slightly older than previous estimates of the deglaciation based on the minimum limiting radiocarbon ages and pollen stratigraphy. During this short interval from 16.7 +/- 1.6 to 13.6 +/- 1.4 ka a large part (100-125 km) of the marine-based sector of the SIS in southwest Sweden was deglaciated, giving an average ice margin retreat between 20 to 50 m a(-1). The inception of the deglaciation pre-dated the Bolling/Allerod warming, the rapid sea level rise at 14.6 cal. ka BP and the first inflow of warm Atlantic waters into Skagerrak. We suggest that ice retreat in southwest Sweden is mainly a dynamical response governed by the disintegration of the Norwegian Channel Ice Stream and not primarily driven by climatic changes. Copyright (c) 2011 John Wiley & Sons, Ltd.},
  author       = {Larsen, Nicolaj Krog and Linge, Henriette and Håkansson, Lena and Fabel, Derek},
  issn         = {1099-1417},
  keyword      = {Scandinavian Ice Sheet,last deglaciation,cosmogenic nuclide surface,exposure dating},
  language     = {eng},
  number       = {2},
  pages        = {211--220},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Quaternary Science},
  title        = {Investigating the last deglaciation of the Scandinavian Ice Sheet in southwest Sweden with Be-10 exposure dating},
  url          = {http://dx.doi.org/10.1002/jqs.1536},
  volume       = {27},
  year         = {2012},
}