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Landscape imprints of changing glacial regimes during ice-sheet build-up and decay: a conceptual model from Svalbard

Landvik, Jon Y.; Alexanderson, Helena LU ; Henriksen, Mona and Ingolfsson, Olafur (2014) In Quaternary Science Reviews 92. p.258-268
Abstract
The behaviour of ice sheets and their geologic imprints in fjord regions are often multifaceted. Fjords, which were temporarily occupied by fast flowing ice-streams during major glaciations, and inter-fjord areas, which were covered by less active ice, show different signatures of past glaciations. The land and marine records of glaciations over the western Svalbard fjord region have been extensively studied during the last few decades. We have re-examined ice-flow records from stratigraphic and geomorphic settings, and propose a succession of ice-flow events that occurred repeatedly over glacial cycles: the maximum, the transitional, and the local flow style. The differently topographically constrained segments of the ice-sheet switched... (More)
The behaviour of ice sheets and their geologic imprints in fjord regions are often multifaceted. Fjords, which were temporarily occupied by fast flowing ice-streams during major glaciations, and inter-fjord areas, which were covered by less active ice, show different signatures of past glaciations. The land and marine records of glaciations over the western Svalbard fjord region have been extensively studied during the last few decades. We have re-examined ice-flow records from stratigraphic and geomorphic settings, and propose a succession of ice-flow events that occurred repeatedly over glacial cycles: the maximum, the transitional, and the local flow style. The differently topographically constrained segments of the ice-sheet switched behaviour as glacial dynamics developed through each glacial cycle. These segments, as well as the different flow styles, are reflected differently in the offshore stratigraphic record. We propose that the glacial geomorphological signatures in the inter ice-stream areas mostly developed under warm-based conditions during a late phase of the glaciations, and that the overall glacial imprints in the landscape are strongly biased towards the youngest events. (C) 2013 Elsevier Ltd. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Svalbard, Ice flow, Glacial regime, Landscape imprints
in
Quaternary Science Reviews
volume
92
pages
258 - 268
publisher
Elsevier
external identifiers
  • wos:000337198400019
  • scopus:84900391955
ISSN
0277-3791
DOI
10.1016/j.quascirev.2013.11.023
language
English
LU publication?
yes
id
13191279-57d9-4a21-a16f-939bc1a2a245 (old id 4545022)
date added to LUP
2014-07-16 15:49:03
date last changed
2017-10-22 03:23:09
@article{13191279-57d9-4a21-a16f-939bc1a2a245,
  abstract     = {The behaviour of ice sheets and their geologic imprints in fjord regions are often multifaceted. Fjords, which were temporarily occupied by fast flowing ice-streams during major glaciations, and inter-fjord areas, which were covered by less active ice, show different signatures of past glaciations. The land and marine records of glaciations over the western Svalbard fjord region have been extensively studied during the last few decades. We have re-examined ice-flow records from stratigraphic and geomorphic settings, and propose a succession of ice-flow events that occurred repeatedly over glacial cycles: the maximum, the transitional, and the local flow style. The differently topographically constrained segments of the ice-sheet switched behaviour as glacial dynamics developed through each glacial cycle. These segments, as well as the different flow styles, are reflected differently in the offshore stratigraphic record. We propose that the glacial geomorphological signatures in the inter ice-stream areas mostly developed under warm-based conditions during a late phase of the glaciations, and that the overall glacial imprints in the landscape are strongly biased towards the youngest events. (C) 2013 Elsevier Ltd. All rights reserved.},
  author       = {Landvik, Jon Y. and Alexanderson, Helena and Henriksen, Mona and Ingolfsson, Olafur},
  issn         = {0277-3791},
  keyword      = {Svalbard,Ice flow,Glacial regime,Landscape imprints},
  language     = {eng},
  pages        = {258--268},
  publisher    = {Elsevier},
  series       = {Quaternary Science Reviews},
  title        = {Landscape imprints of changing glacial regimes during ice-sheet build-up and decay: a conceptual model from Svalbard},
  url          = {http://dx.doi.org/10.1016/j.quascirev.2013.11.023},
  volume       = {92},
  year         = {2014},
}