Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland
Non-invasive geophysical prospecting and a thermodynamic model were used to examine the structure, depth and lateral extent of the frozen core of a palsa near Lake Peerajärvi, in northwest Finland. A simple thermodynamic model verified that the current climatic conditions in the study area allow sus...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/43168 2024-01-07T09:41:43+01:00 Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland Kohout, Tomas Bucko, Michal Rasmus, Kai Leppäranta, Matti Matero, Ilkka Department of Physics Planetary-system research 2014-03-17T09:16:01Z 8 application/pdf http://hdl.handle.net/10138/43168 eng eng John Wiley & Sons Ltd. 10.1002/ppp.1798 Kohout , T , Bucko , M , Rasmus , K , Leppäranta , M & Matero , I 2014 , ' Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland ' , Permafrost and Periglacial Processes , vol. 25 , pp. 45-52 . https://doi.org/10.1002/ppp.1798 ORCID: /0000-0003-4458-3650/work/29570885 84896694557 861319b2-d5b2-4f6f-924a-2f86850c515d http://hdl.handle.net/10138/43168 000333022900004 openAccess info:eu-repo/semantics/openAccess 114 Physical sciences GEOPHYSICS GPR thermodynamics 1171 Geosciences PALSA PERMAFROST Article acceptedVersion 2014 ftunivhelsihelda 2023-12-14T00:03:22Z Non-invasive geophysical prospecting and a thermodynamic model were used to examine the structure, depth and lateral extent of the frozen core of a palsa near Lake Peerajärvi, in northwest Finland. A simple thermodynamic model verified that the current climatic conditions in the study area allow sustainable palsa development. A ground penetrating radar (GPR) survey of the palsa under both winter and summer conditions revealed its internal structure and the size of its frozen core. GPR imaging in summer detected the upper peat/core boundary, and imaging in winter detected a deep reflector that probably represents the lower core boundary. This indicates that only a combined summer and winter GPR survey completely reveals the lateral and vertical extent of the frozen core of the palsa. The core underlies the active layer at a depth of ~0.6 m and extends to about 4 m depth. Its lateral extent is ~15 m x ~30 m. The presence of the frozen core could also be traced as minima in surface temperature and ground conductivity measurements. These field methods and thermodynamic models can be utilized in studies of climate impact on Arctic wetlands. Peer reviewed Article in Journal/Newspaper Arctic palsa permafrost Permafrost and Periglacial Processes Lapland HELDA – University of Helsinki Open Repository Arctic Peerajärvi ENVELOPE(21.092,21.092,68.888,68.888) Permafrost and Periglacial Processes 25 1 45 52 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
114 Physical sciences GEOPHYSICS GPR thermodynamics 1171 Geosciences PALSA PERMAFROST |
spellingShingle |
114 Physical sciences GEOPHYSICS GPR thermodynamics 1171 Geosciences PALSA PERMAFROST Kohout, Tomas Bucko, Michal Rasmus, Kai Leppäranta, Matti Matero, Ilkka Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland |
topic_facet |
114 Physical sciences GEOPHYSICS GPR thermodynamics 1171 Geosciences PALSA PERMAFROST |
description |
Non-invasive geophysical prospecting and a thermodynamic model were used to examine the structure, depth and lateral extent of the frozen core of a palsa near Lake Peerajärvi, in northwest Finland. A simple thermodynamic model verified that the current climatic conditions in the study area allow sustainable palsa development. A ground penetrating radar (GPR) survey of the palsa under both winter and summer conditions revealed its internal structure and the size of its frozen core. GPR imaging in summer detected the upper peat/core boundary, and imaging in winter detected a deep reflector that probably represents the lower core boundary. This indicates that only a combined summer and winter GPR survey completely reveals the lateral and vertical extent of the frozen core of the palsa. The core underlies the active layer at a depth of ~0.6 m and extends to about 4 m depth. Its lateral extent is ~15 m x ~30 m. The presence of the frozen core could also be traced as minima in surface temperature and ground conductivity measurements. These field methods and thermodynamic models can be utilized in studies of climate impact on Arctic wetlands. Peer reviewed |
author2 |
Department of Physics Planetary-system research |
format |
Article in Journal/Newspaper |
author |
Kohout, Tomas Bucko, Michal Rasmus, Kai Leppäranta, Matti Matero, Ilkka |
author_facet |
Kohout, Tomas Bucko, Michal Rasmus, Kai Leppäranta, Matti Matero, Ilkka |
author_sort |
Kohout, Tomas |
title |
Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland |
title_short |
Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland |
title_full |
Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland |
title_fullStr |
Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland |
title_full_unstemmed |
Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland |
title_sort |
non-invasive geophysical investigation and thermodynamic analysis of a palsa in lapland, northwest finland |
publisher |
John Wiley & Sons Ltd. |
publishDate |
2014 |
url |
http://hdl.handle.net/10138/43168 |
long_lat |
ENVELOPE(21.092,21.092,68.888,68.888) |
geographic |
Arctic Peerajärvi |
geographic_facet |
Arctic Peerajärvi |
genre |
Arctic palsa permafrost Permafrost and Periglacial Processes Lapland |
genre_facet |
Arctic palsa permafrost Permafrost and Periglacial Processes Lapland |
op_relation |
10.1002/ppp.1798 Kohout , T , Bucko , M , Rasmus , K , Leppäranta , M & Matero , I 2014 , ' Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland ' , Permafrost and Periglacial Processes , vol. 25 , pp. 45-52 . https://doi.org/10.1002/ppp.1798 ORCID: /0000-0003-4458-3650/work/29570885 84896694557 861319b2-d5b2-4f6f-924a-2f86850c515d http://hdl.handle.net/10138/43168 000333022900004 |
op_rights |
openAccess info:eu-repo/semantics/openAccess |
container_title |
Permafrost and Periglacial Processes |
container_volume |
25 |
container_issue |
1 |
container_start_page |
45 |
op_container_end_page |
52 |
_version_ |
1787422519585669120 |