Internal structure and palsa development at Orravatnsrústir Palsa Site (Central Iceland), investigated by means of integrated resistivity and ground‐penetrating radar methods
Abstract The natural cyclical development of palsas makes it difficult to use visible signs of decay as reference points for environmental change. Thus, to determine the actual development stage of a palsa, investigations of the internal structure are crucial. Our study presents 2‐D and 3‐D electric...
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Online Access: | http://dx.doi.org/10.1002/ppp.2106 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2106 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2106 |
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crwiley:10.1002/ppp.2106 2024-06-02T08:08:03+00:00 Internal structure and palsa development at Orravatnsrústir Palsa Site (Central Iceland), investigated by means of integrated resistivity and ground‐penetrating radar methods Emmert, Adrian Kneisel, Christof Deutsche Forschungsgemeinschaft 2021 http://dx.doi.org/10.1002/ppp.2106 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2106 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2106 en eng Wiley http://creativecommons.org/licenses/by-nc-nd/4.0/ Permafrost and Periglacial Processes volume 32, issue 3, page 503-519 ISSN 1045-6740 1099-1530 journal-article 2021 crwiley https://doi.org/10.1002/ppp.2106 2024-05-03T11:57:03Z Abstract The natural cyclical development of palsas makes it difficult to use visible signs of decay as reference points for environmental change. Thus, to determine the actual development stage of a palsa, investigations of the internal structure are crucial. Our study presents 2‐D and 3‐D electrical resistivity imaging (ERI) and 2‐D ground‐penetrating radar (GPR) results, measurements of surface and subsurface temperatures, and of the soil matric potential from Orravatnsrústir Palsa Site in Central Iceland. By a joint interpretation of the results, we deduce the internal structure (i.e., thickness of thaw zone and permafrost, ice/water content) of five palsas of different size and shape. The results differentiate between initial and mature development stages and show that palsas of different development stages can exist in close proximity. While internal characteristics indicate undisturbed development of four palsas, one palsa shows indications of environmental change. Our study shows the value of the multimethod geophysical approach and introduces measurements of the soil matric potential as a promising method to assess the current state of the subsurface. Article in Journal/Newspaper Ice Iceland palsa palsas permafrost Permafrost and Periglacial Processes Wiley Online Library Orravatnsrústir ENVELOPE(-18.520,-18.520,65.103,65.103) Permafrost and Periglacial Processes |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The natural cyclical development of palsas makes it difficult to use visible signs of decay as reference points for environmental change. Thus, to determine the actual development stage of a palsa, investigations of the internal structure are crucial. Our study presents 2‐D and 3‐D electrical resistivity imaging (ERI) and 2‐D ground‐penetrating radar (GPR) results, measurements of surface and subsurface temperatures, and of the soil matric potential from Orravatnsrústir Palsa Site in Central Iceland. By a joint interpretation of the results, we deduce the internal structure (i.e., thickness of thaw zone and permafrost, ice/water content) of five palsas of different size and shape. The results differentiate between initial and mature development stages and show that palsas of different development stages can exist in close proximity. While internal characteristics indicate undisturbed development of four palsas, one palsa shows indications of environmental change. Our study shows the value of the multimethod geophysical approach and introduces measurements of the soil matric potential as a promising method to assess the current state of the subsurface. |
author2 |
Deutsche Forschungsgemeinschaft |
format |
Article in Journal/Newspaper |
author |
Emmert, Adrian Kneisel, Christof |
spellingShingle |
Emmert, Adrian Kneisel, Christof Internal structure and palsa development at Orravatnsrústir Palsa Site (Central Iceland), investigated by means of integrated resistivity and ground‐penetrating radar methods |
author_facet |
Emmert, Adrian Kneisel, Christof |
author_sort |
Emmert, Adrian |
title |
Internal structure and palsa development at Orravatnsrústir Palsa Site (Central Iceland), investigated by means of integrated resistivity and ground‐penetrating radar methods |
title_short |
Internal structure and palsa development at Orravatnsrústir Palsa Site (Central Iceland), investigated by means of integrated resistivity and ground‐penetrating radar methods |
title_full |
Internal structure and palsa development at Orravatnsrústir Palsa Site (Central Iceland), investigated by means of integrated resistivity and ground‐penetrating radar methods |
title_fullStr |
Internal structure and palsa development at Orravatnsrústir Palsa Site (Central Iceland), investigated by means of integrated resistivity and ground‐penetrating radar methods |
title_full_unstemmed |
Internal structure and palsa development at Orravatnsrústir Palsa Site (Central Iceland), investigated by means of integrated resistivity and ground‐penetrating radar methods |
title_sort |
internal structure and palsa development at orravatnsrústir palsa site (central iceland), investigated by means of integrated resistivity and ground‐penetrating radar methods |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/ppp.2106 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2106 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2106 |
long_lat |
ENVELOPE(-18.520,-18.520,65.103,65.103) |
geographic |
Orravatnsrústir |
geographic_facet |
Orravatnsrústir |
genre |
Ice Iceland palsa palsas permafrost Permafrost and Periglacial Processes |
genre_facet |
Ice Iceland palsa palsas permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 32, issue 3, page 503-519 ISSN 1045-6740 1099-1530 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0/ |
op_doi |
https://doi.org/10.1002/ppp.2106 |
container_title |
Permafrost and Periglacial Processes |
_version_ |
1800753205612642304 |