We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Past and Present Permafrost Temperatures in the Abisko Area: Redrilling of Boreholes.
- Authors
Johansson, Margareta; Åkerman, Jonas; Keuper, Frida; Christensen, Torben; Lantuit, Hugues; Callaghan, Terry
- Abstract
Monitoring of permafrost has been ongoing since 1978 in the Abisko area, northernmost Sweden, when measurements of active layer thickness started. In 1980, boreholes were drilled in three mires in the area to record permafrost temperatures. Recordings were made twice per year, and the last data were obtained in 2002. During the International Polar Year (2007-2008), new boreholes were drilled within the 'Back to the Future' (BTF) and 'Thermal State of Permafrost' (TSP) projects that enabled year-round temperature monitoring. Mean annual ground temperatures (MAGT) in the mires are close to 0°C, ranging from −0.16 to −0.47°C at 5 m depth. Data from the boreholes show increasing ground temperatures in the upper and lower part by 0.4 to 1°C between 1980 and 2002. At one mire, permafrost thickness has decreased from 15 m in 1980 to ca. 9 m in 2009, with an accelerating thawing trend during the last decade.
- Subjects
ABISKO (Sweden); SWEDEN; PERMAFROST; INTERNATIONAL Polar Year, 2007-2008; EARTH temperature; SPORADIC E (Ionosphere); BOREHOLE mining
- Publication
AMBIO - A Journal of the Human Environment, 2011, Vol 40, Issue 6, p558
- ISSN
0044-7447
- Publication type
Article
- DOI
10.1007/s13280-011-0163-3