Investigating the last deglaciation of the Scandinavian Ice Sheet in southwest Sweden with 10Be exposure dating
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Investigating the last deglaciation of the Scandinavian Ice Sheet in southwest Sweden with 10Be exposure dating. / Larsen, Nicolaj Krog; Linge, Henriette; Håkansson, Lena; Fabel, Derek.
In: Journal of Quaternary Science, Vol. 27, No. 2, 2012, p. 211-220.Research output: Contribution to journal › Journal article › Research › peer-review
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T1 - Investigating the last deglaciation of the Scandinavian Ice Sheet in southwest Sweden with 10Be exposure dating
AU - Larsen, Nicolaj Krog
AU - Linge, Henriette
AU - Håkansson, Lena
AU - Fabel, Derek
PY - 2012
Y1 - 2012
N2 - In this study we have obtained 17 cosmogenic exposure ages from three well-developed moraine systems - Halland Coastal Moraines (HCM), Göteborg 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±1.4ka, 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±1.4ka a large part (100-125km) of the marine-based sector of the SIS in southwest Sweden was deglaciated, giving an average ice margin retreat between 20 to 50m a -1. The inception of the deglaciation pre-dated the Bølling/Allerød warming, the rapid sea level rise at 14.6cal. 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.
AB - In this study we have obtained 17 cosmogenic exposure ages from three well-developed moraine systems - Halland Coastal Moraines (HCM), Göteborg 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±1.4ka, 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±1.4ka a large part (100-125km) of the marine-based sector of the SIS in southwest Sweden was deglaciated, giving an average ice margin retreat between 20 to 50m a -1. The inception of the deglaciation pre-dated the Bølling/Allerød warming, the rapid sea level rise at 14.6cal. 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.
KW - Cosmogenic nuclide surface exposure dating
KW - Last deglaciation
KW - Scandinavian Ice Sheet
U2 - 10.1002/jqs.1536
DO - 10.1002/jqs.1536
M3 - Journal article
AN - SCOPUS:84856775795
VL - 27
SP - 211
EP - 220
JO - Journal of Quaternary Science
JF - Journal of Quaternary Science
SN - 0267-8179
IS - 2
ER -
ID: 235141207