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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ftdatacite:10.48550/arxiv.1403.2211 2023-05-15T15:06:00+02:00 Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland Kohout, Tomáš Bućko, Michał S. Rasmus, Kai Leppäranta, Matti Matero, Ilkka 2014 https://dx.doi.org/10.48550/arxiv.1403.2211 https://arxiv.org/abs/1403.2211 unknown arXiv https://dx.doi.org/10.1002/ppp.1798 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Geophysics physics.geo-ph FOS Physical sciences article-journal Article ScholarlyArticle Text 2014 ftdatacite https://doi.org/10.48550/arxiv.1403.2211 https://doi.org/10.1002/ppp.1798 2022-04-01T13:00:30Z 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. Text Arctic palsa Lapland DataCite Metadata Store (German National Library of Science and Technology) Arctic Peerajärvi ENVELOPE(21.092,21.092,68.888,68.888) |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
Geophysics physics.geo-ph FOS Physical sciences |
spellingShingle |
Geophysics physics.geo-ph FOS Physical sciences Kohout, Tomáš Bućko, Michał S. Rasmus, Kai Leppäranta, Matti Matero, Ilkka Non-invasive geophysical investigation and thermodynamic analysis of a palsa in Lapland, northwest Finland |
topic_facet |
Geophysics physics.geo-ph FOS Physical sciences |
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. |
format |
Text |
author |
Kohout, Tomáš Bućko, Michał S. Rasmus, Kai Leppäranta, Matti Matero, Ilkka |
author_facet |
Kohout, Tomáš Bućko, Michał S. Rasmus, Kai Leppäranta, Matti Matero, Ilkka |
author_sort |
Kohout, Tomáš |
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 |
arXiv |
publishDate |
2014 |
url |
https://dx.doi.org/10.48550/arxiv.1403.2211 https://arxiv.org/abs/1403.2211 |
long_lat |
ENVELOPE(21.092,21.092,68.888,68.888) |
geographic |
Arctic Peerajärvi |
geographic_facet |
Arctic Peerajärvi |
genre |
Arctic palsa Lapland |
genre_facet |
Arctic palsa Lapland |
op_relation |
https://dx.doi.org/10.1002/ppp.1798 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1403.2211 https://doi.org/10.1002/ppp.1798 |
_version_ |
1766337676655460352 |