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Climatic control of the surge periodicity of an Icelandic outlet glacier

Striberger, Johan LU ; Björck, Svante LU ; Benediktsson, Ivar Orn; Snowball, Ian LU ; Bertacchi Uvo, Cintia LU ; Ingolfsson, Olafur and Kjaer, Kurt H. (2011) In Journal of Quaternary Science 26(6). p.561-565
Abstract
Surging outlet glaciers are important in draining large ice caps, but the mechanisms controlling surge periodicities are poorly known. We investigated a sediment sequence from the glacier-fed Lake Logurinn in eastern Iceland, and our unique annually resolved data, based on sedimentary varves, imply that Eyjabakkajokull, an outlet glacier of Vatnajokull, began surging about 2200 cal a BP (before 1950 AD). Approximately 1700 cal a BP, the glacier started to surge at a uniform 34- to 38-year periodicity that prevailed until the coldest part of the Little Ice Age when the periodicity almost halved to 21-23 years. Since the late 1800s the surge periodicity of Eyjabakkajokull has returned to a longer period of 35-40 years. We suggest that surge... (More)
Surging outlet glaciers are important in draining large ice caps, but the mechanisms controlling surge periodicities are poorly known. We investigated a sediment sequence from the glacier-fed Lake Logurinn in eastern Iceland, and our unique annually resolved data, based on sedimentary varves, imply that Eyjabakkajokull, an outlet glacier of Vatnajokull, began surging about 2200 cal a BP (before 1950 AD). Approximately 1700 cal a BP, the glacier started to surge at a uniform 34- to 38-year periodicity that prevailed until the coldest part of the Little Ice Age when the periodicity almost halved to 21-23 years. Since the late 1800s the surge periodicity of Eyjabakkajokull has returned to a longer period of 35-40 years. We suggest that surge periodicities of Eyjabakkajokull are forced by climatically driven mass balance changes, which may be a common forcing factor for similar surge-type outlet glaciers. Copyright (C) 2011 John Wiley & Sons, Ltd. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
climate, glacial surge, Iceland, surge periodicity, varved lake, sediments
in
Journal of Quaternary Science
volume
26
issue
6
pages
561 - 565
publisher
John Wiley & Sons
external identifiers
  • wos:000294583000001
  • scopus:80051472823
ISSN
1099-1417
DOI
10.1002/jqs.1527
project
MERGE
BECC
language
English
LU publication?
yes
id
f8d6e4e5-81d8-44d4-97b3-a356d629bcfb (old id 2186840)
date added to LUP
2011-10-24 12:54:15
date last changed
2017-10-29 03:59:30
@article{f8d6e4e5-81d8-44d4-97b3-a356d629bcfb,
  abstract     = {Surging outlet glaciers are important in draining large ice caps, but the mechanisms controlling surge periodicities are poorly known. We investigated a sediment sequence from the glacier-fed Lake Logurinn in eastern Iceland, and our unique annually resolved data, based on sedimentary varves, imply that Eyjabakkajokull, an outlet glacier of Vatnajokull, began surging about 2200 cal a BP (before 1950 AD). Approximately 1700 cal a BP, the glacier started to surge at a uniform 34- to 38-year periodicity that prevailed until the coldest part of the Little Ice Age when the periodicity almost halved to 21-23 years. Since the late 1800s the surge periodicity of Eyjabakkajokull has returned to a longer period of 35-40 years. We suggest that surge periodicities of Eyjabakkajokull are forced by climatically driven mass balance changes, which may be a common forcing factor for similar surge-type outlet glaciers. Copyright (C) 2011 John Wiley & Sons, Ltd.},
  author       = {Striberger, Johan and Björck, Svante and Benediktsson, Ivar Orn and Snowball, Ian and Bertacchi Uvo, Cintia and Ingolfsson, Olafur and Kjaer, Kurt H.},
  issn         = {1099-1417},
  keyword      = {climate,glacial surge,Iceland,surge periodicity,varved lake,sediments},
  language     = {eng},
  number       = {6},
  pages        = {561--565},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Quaternary Science},
  title        = {Climatic control of the surge periodicity of an Icelandic outlet glacier},
  url          = {http://dx.doi.org/10.1002/jqs.1527},
  volume       = {26},
  year         = {2011},
}