Recent air and ground temperature increases at Tarfala Research Station, Sweden
Long-term data records are essential to detect and understand environmental change, in particular in generally data-sparse high-latitude and high-altitude regions. Here, we analyse a 47-year air temperature record (1965-2011) at Tarfala Research Station (67° 54.7'N, 18° 36.7'E, 1135 m a.s....
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ftjpolarres:oai:journals.openacademia.net:article/3105 2024-09-09T19:59:45+00:00 Recent air and ground temperature increases at Tarfala Research Station, Sweden Jonsell, Ulf Hock, Regine Duguay, Martial 2013-07-15 application/pdf text/html application/epub+zip text/plain https://polarresearch.net/index.php/polar/article/view/3105 https://doi.org/10.3402/polar.v32i0.19807 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/3105/pdf_1 https://polarresearch.net/index.php/polar/article/view/3105/html https://polarresearch.net/index.php/polar/article/view/3105/epub https://polarresearch.net/index.php/polar/article/view/3105/xml https://polarresearch.net/index.php/polar/article/view/3105 doi:10.3402/polar.v32i0.19807 Polar Research; Vol 32 (2013) 1751-8369 Air temperature climate change permafrost lapse rate degree-days NAO info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2013 ftjpolarres https://doi.org/10.3402/polar.v32i0.19807 2024-06-20T23:33:17Z Long-term data records are essential to detect and understand environmental change, in particular in generally data-sparse high-latitude and high-altitude regions. Here, we analyse a 47-year air temperature record (1965-2011) at Tarfala Research Station (67° 54.7'N, 18° 36.7'E, 1135 m a.s.l.) in northern Sweden, and a nearby 11-year record of 100-m-deep ground temperature (2001-11; 1540 m a.s.l.). The air temperature record shows a mean annual air temperature of -3.5±0.9°C (±1 standard deviation s) and a linear warming trend of ±0.042°C yr-1. The warming trend shows large month-to-month variations with the largest trend in January followed by October. Also, the number of days with positive mean daily temperatures and positive degree-day sums has increased during the last two decades compared to the previous period. Temperature lapse rates derived from the mean daily Tarfala record and an air temperature record at the borehole site average 4.5°C km-1 and tend to be higher in summer than in winter. Mean summer air temperatures at Tarfala explain 76% of the variance of the summer glacier mass balance of nearby Storglacia¨ren. Consistent with the observed increase in Tarfala’s air temperature, the ground temperature record shows significant permafrost warming with the largest trend (0.047°C yr-1) found at 20 m depth.Keywords: Air temperature; climate change; permafrost; lapse rate; degree-days; NAO(Published: 15 July 2013)Citation: Polar Research 2013, 32, 19807, http://dx.doi.org/10.3402/polar.v32i0.19807 Article in Journal/Newspaper Northern Sweden permafrost Polar Research Tarfala ren Polar Research Tarfala ENVELOPE(18.608,18.608,67.914,67.914) Polar Research 32 1 19807 |
institution |
Open Polar |
collection |
Polar Research |
op_collection_id |
ftjpolarres |
language |
English |
topic |
Air temperature climate change permafrost lapse rate degree-days NAO |
spellingShingle |
Air temperature climate change permafrost lapse rate degree-days NAO Jonsell, Ulf Hock, Regine Duguay, Martial Recent air and ground temperature increases at Tarfala Research Station, Sweden |
topic_facet |
Air temperature climate change permafrost lapse rate degree-days NAO |
description |
Long-term data records are essential to detect and understand environmental change, in particular in generally data-sparse high-latitude and high-altitude regions. Here, we analyse a 47-year air temperature record (1965-2011) at Tarfala Research Station (67° 54.7'N, 18° 36.7'E, 1135 m a.s.l.) in northern Sweden, and a nearby 11-year record of 100-m-deep ground temperature (2001-11; 1540 m a.s.l.). The air temperature record shows a mean annual air temperature of -3.5±0.9°C (±1 standard deviation s) and a linear warming trend of ±0.042°C yr-1. The warming trend shows large month-to-month variations with the largest trend in January followed by October. Also, the number of days with positive mean daily temperatures and positive degree-day sums has increased during the last two decades compared to the previous period. Temperature lapse rates derived from the mean daily Tarfala record and an air temperature record at the borehole site average 4.5°C km-1 and tend to be higher in summer than in winter. Mean summer air temperatures at Tarfala explain 76% of the variance of the summer glacier mass balance of nearby Storglacia¨ren. Consistent with the observed increase in Tarfala’s air temperature, the ground temperature record shows significant permafrost warming with the largest trend (0.047°C yr-1) found at 20 m depth.Keywords: Air temperature; climate change; permafrost; lapse rate; degree-days; NAO(Published: 15 July 2013)Citation: Polar Research 2013, 32, 19807, http://dx.doi.org/10.3402/polar.v32i0.19807 |
format |
Article in Journal/Newspaper |
author |
Jonsell, Ulf Hock, Regine Duguay, Martial |
author_facet |
Jonsell, Ulf Hock, Regine Duguay, Martial |
author_sort |
Jonsell, Ulf |
title |
Recent air and ground temperature increases at Tarfala Research Station, Sweden |
title_short |
Recent air and ground temperature increases at Tarfala Research Station, Sweden |
title_full |
Recent air and ground temperature increases at Tarfala Research Station, Sweden |
title_fullStr |
Recent air and ground temperature increases at Tarfala Research Station, Sweden |
title_full_unstemmed |
Recent air and ground temperature increases at Tarfala Research Station, Sweden |
title_sort |
recent air and ground temperature increases at tarfala research station, sweden |
publisher |
Norwegian Polar Institute |
publishDate |
2013 |
url |
https://polarresearch.net/index.php/polar/article/view/3105 https://doi.org/10.3402/polar.v32i0.19807 |
long_lat |
ENVELOPE(18.608,18.608,67.914,67.914) |
geographic |
Tarfala |
geographic_facet |
Tarfala |
genre |
Northern Sweden permafrost Polar Research Tarfala ren |
genre_facet |
Northern Sweden permafrost Polar Research Tarfala ren |
op_source |
Polar Research; Vol 32 (2013) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/3105/pdf_1 https://polarresearch.net/index.php/polar/article/view/3105/html https://polarresearch.net/index.php/polar/article/view/3105/epub https://polarresearch.net/index.php/polar/article/view/3105/xml https://polarresearch.net/index.php/polar/article/view/3105 doi:10.3402/polar.v32i0.19807 |
op_doi |
https://doi.org/10.3402/polar.v32i0.19807 |
container_title |
Polar Research |
container_volume |
32 |
container_issue |
1 |
container_start_page |
19807 |
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1809930834216484864 |