Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes
Geophysical methods are often used to characterize and monitor the subsurface composition of permafrost. The resolution capacity of standard methods, i.e. electrical resistivity tomography and refraction seismic tomography, depends not only on static parameters such as measurement geometry, but also...
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ftdoajarticles:oai:doaj.org/article:443cb6c981cf4d2f9d206719b3b3b143 2023-05-15T16:36:45+02:00 Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes B. Mewes C. Hilbich R. Delaloye C. Hauck 2017-12-01T00:00:00Z https://doi.org/10.5194/tc-11-2957-2017 https://doaj.org/article/443cb6c981cf4d2f9d206719b3b3b143 EN eng Copernicus Publications https://www.the-cryosphere.net/11/2957/2017/tc-11-2957-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-11-2957-2017 1994-0416 1994-0424 https://doaj.org/article/443cb6c981cf4d2f9d206719b3b3b143 The Cryosphere, Vol 11, Pp 2957-2974 (2017) Environmental sciences GE1-350 Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.5194/tc-11-2957-2017 2022-12-30T21:36:41Z Geophysical methods are often used to characterize and monitor the subsurface composition of permafrost. The resolution capacity of standard methods, i.e. electrical resistivity tomography and refraction seismic tomography, depends not only on static parameters such as measurement geometry, but also on the temporal variability in the contrast of the geophysical target variables (electrical resistivity and P-wave velocity). Our study analyses the resolution capacity of electrical resistivity tomography and refraction seismic tomography for typical processes in the context of permafrost degradation using synthetic and field data sets of mountain permafrost terrain. In addition, we tested the resolution capacity of a petrophysically based quantitative combination of both methods, the so-called 4-phase model, and through this analysed the expected changes in water and ice content upon permafrost thaw. The results from the synthetic data experiments suggest a higher sensitivity regarding an increase in water content compared to a decrease in ice content. A potentially larger uncertainty originates from the individual geophysical methods than from the combined evaluation with the 4-phase model. In the latter, a loss of ground ice can be detected quite reliably, whereas artefacts occur in the case of increased horizontal or vertical water flow. Analysis of field data from a well-investigated rock glacier in the Swiss Alps successfully visualized the seasonal ice loss in summer and the complex spatially variable ice, water and air content changes in an interannual comparison. Article in Journal/Newspaper Ice permafrost The Cryosphere Directory of Open Access Journals: DOAJ Articles The Cryosphere 11 6 2957 2974 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 B. Mewes C. Hilbich R. Delaloye C. Hauck Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Geophysical methods are often used to characterize and monitor the subsurface composition of permafrost. The resolution capacity of standard methods, i.e. electrical resistivity tomography and refraction seismic tomography, depends not only on static parameters such as measurement geometry, but also on the temporal variability in the contrast of the geophysical target variables (electrical resistivity and P-wave velocity). Our study analyses the resolution capacity of electrical resistivity tomography and refraction seismic tomography for typical processes in the context of permafrost degradation using synthetic and field data sets of mountain permafrost terrain. In addition, we tested the resolution capacity of a petrophysically based quantitative combination of both methods, the so-called 4-phase model, and through this analysed the expected changes in water and ice content upon permafrost thaw. The results from the synthetic data experiments suggest a higher sensitivity regarding an increase in water content compared to a decrease in ice content. A potentially larger uncertainty originates from the individual geophysical methods than from the combined evaluation with the 4-phase model. In the latter, a loss of ground ice can be detected quite reliably, whereas artefacts occur in the case of increased horizontal or vertical water flow. Analysis of field data from a well-investigated rock glacier in the Swiss Alps successfully visualized the seasonal ice loss in summer and the complex spatially variable ice, water and air content changes in an interannual comparison. |
format |
Article in Journal/Newspaper |
author |
B. Mewes C. Hilbich R. Delaloye C. Hauck |
author_facet |
B. Mewes C. Hilbich R. Delaloye C. Hauck |
author_sort |
B. Mewes |
title |
Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes |
title_short |
Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes |
title_full |
Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes |
title_fullStr |
Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes |
title_full_unstemmed |
Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes |
title_sort |
resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-2957-2017 https://doaj.org/article/443cb6c981cf4d2f9d206719b3b3b143 |
genre |
Ice permafrost The Cryosphere |
genre_facet |
Ice permafrost The Cryosphere |
op_source |
The Cryosphere, Vol 11, Pp 2957-2974 (2017) |
op_relation |
https://www.the-cryosphere.net/11/2957/2017/tc-11-2957-2017.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-11-2957-2017 1994-0416 1994-0424 https://doaj.org/article/443cb6c981cf4d2f9d206719b3b3b143 |
op_doi |
https://doi.org/10.5194/tc-11-2957-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
6 |
container_start_page |
2957 |
op_container_end_page |
2974 |
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1766027078909558784 |