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Thawing permafrost and thicker active layers in sub-arctic Sweden

Åkerman, Jonas LU and Johansson, Margareta LU (2008) In Permafrost and Periglacial Processes 19(3). p.279-292
Abstract
Observations of active-layer thickness from nine sites with up to 29 years of gridded measurements located in the Tornetrask region, northernmost Sweden, were examined in relation to climatic trends. Mean annual air temperatures in this area have warmed and recently rose above 0 degrees C. Active layers at all sites have become thicker, at rates ranging from 0.7 to 1.3 cm per year. This trend has accelerated in the past decade, especially in the westernmost site where rates have reached 2 cm per year and permafrost has disappeared at 81 per cent of the sampling points. Increased active-layer thicknesses are correlated with increases in mean summer air temperature, thawing degree-days and, in five of the nine sites, with increases in snow... (More)
Observations of active-layer thickness from nine sites with up to 29 years of gridded measurements located in the Tornetrask region, northernmost Sweden, were examined in relation to climatic trends. Mean annual air temperatures in this area have warmed and recently rose above 0 degrees C. Active layers at all sites have become thicker, at rates ranging from 0.7 to 1.3 cm per year. This trend has accelerated in the past decade, especially in the westernmost site where rates have reached 2 cm per year and permafrost has disappeared at 81 per cent of the sampling points. Increased active-layer thicknesses are correlated with increases in mean summer air temperature, thawing degree-days and, in five of the nine sites, with increases in snow depth. Copyright (C) 2008 John Wiley & Sons, Ltd. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Abisko, subarctic Sweden, active-layer thickness, thawing permafrost
in
Permafrost and Periglacial Processes
volume
19
issue
3
pages
279 - 292
publisher
John Wiley & Sons
external identifiers
  • wos:000259296600002
  • scopus:52949118018
ISSN
1099-1530
DOI
10.1002/ppp.626
language
English
LU publication?
yes
id
e525d37b-947f-419e-a14f-b77cbef438bf (old id 1246628)
date added to LUP
2008-11-18 12:52:21
date last changed
2017-11-05 03:31:47
@article{e525d37b-947f-419e-a14f-b77cbef438bf,
  abstract     = {Observations of active-layer thickness from nine sites with up to 29 years of gridded measurements located in the Tornetrask region, northernmost Sweden, were examined in relation to climatic trends. Mean annual air temperatures in this area have warmed and recently rose above 0 degrees C. Active layers at all sites have become thicker, at rates ranging from 0.7 to 1.3 cm per year. This trend has accelerated in the past decade, especially in the westernmost site where rates have reached 2 cm per year and permafrost has disappeared at 81 per cent of the sampling points. Increased active-layer thicknesses are correlated with increases in mean summer air temperature, thawing degree-days and, in five of the nine sites, with increases in snow depth. Copyright (C) 2008 John Wiley & Sons, Ltd.},
  author       = {Åkerman, Jonas and Johansson, Margareta},
  issn         = {1099-1530},
  keyword      = {Abisko,subarctic Sweden,active-layer thickness,thawing permafrost},
  language     = {eng},
  number       = {3},
  pages        = {279--292},
  publisher    = {John Wiley & Sons},
  series       = {Permafrost and Periglacial Processes},
  title        = {Thawing permafrost and thicker active layers in sub-arctic Sweden},
  url          = {http://dx.doi.org/10.1002/ppp.626},
  volume       = {19},
  year         = {2008},
}