Internal structure and palsa development at Orravatnsrústir Palsa Site (Central Iceland), investigated by means of integrated resistivity and ground‐penetrating radar methods
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 resist...
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ftdatacite:10.23689/fidgeo-4277 2023-05-15T16:37:47+02:00 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 2021 https://dx.doi.org/10.23689/fidgeo-4277 https://e-docs.geo-leo.de/handle/11858/8623 en eng FID GEO Text Article article-journal ScholarlyArticle 2021 ftdatacite https://doi.org/10.23689/fidgeo-4277 2021-11-05T12:55:41Z 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. : German Research Foundation (Deutsche Forschungsgemeinschaft DFG) http://dx.doi.org/10.13039/501100001659 Text Ice Iceland palsa palsas permafrost DataCite Metadata Store (German National Library of Science and Technology) Orravatnsrústir ENVELOPE(-18.520,-18.520,65.103,65.103) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
description |
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. : German Research Foundation (Deutsche Forschungsgemeinschaft DFG) http://dx.doi.org/10.13039/501100001659 |
format |
Text |
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 |
FID GEO |
publishDate |
2021 |
url |
https://dx.doi.org/10.23689/fidgeo-4277 https://e-docs.geo-leo.de/handle/11858/8623 |
long_lat |
ENVELOPE(-18.520,-18.520,65.103,65.103) |
geographic |
Orravatnsrústir |
geographic_facet |
Orravatnsrústir |
genre |
Ice Iceland palsa palsas permafrost |
genre_facet |
Ice Iceland palsa palsas permafrost |
op_doi |
https://doi.org/10.23689/fidgeo-4277 |
_version_ |
1766028081493966848 |