Applicability of electrical resistivity tomography monitoring to coarse blocky and ice‐rich permafrost landforms
Abstract The inversion and interpretation of electrical resistivity tomography (ERT) data from coarse blocky and ice‐rich permafrost sites are challenging due to strong resistivity contrasts and high contact resistances. To assess temporal changes during ERT monitoring (ERTM), corresponding inversio...
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crwiley:10.1002/ppp.652 2024-09-09T19:44:22+00:00 Applicability of electrical resistivity tomography monitoring to coarse blocky and ice‐rich permafrost landforms Hilbich, C. Marescot, L. Hauck, C. Loke, M. H. Mäusbacher, R. 2009 http://dx.doi.org/10.1002/ppp.652 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.652 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.652 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 20, issue 3, page 269-284 ISSN 1045-6740 1099-1530 journal-article 2009 crwiley https://doi.org/10.1002/ppp.652 2024-08-20T04:17:24Z Abstract The inversion and interpretation of electrical resistivity tomography (ERT) data from coarse blocky and ice‐rich permafrost sites are challenging due to strong resistivity contrasts and high contact resistances. To assess temporal changes during ERT monitoring (ERTM), corresponding inversion artefacts have to be separated from true subsurface changes. Appraisal techniques serve to analyse an ERTM data set from a rockglacier, including synthetic modelling, the depth of investigation index technique and the so‐called resolution matrix approach. The application of these methods led step by step to the identification of unreliable model regions and thus to the improvement in interpretation of temporal resistivity changes. An important result is that resistivity values of model regions with strong resistivity contrasts and highly resistive features are generally of critical reliability, and resistivity changes within or below the ice core of a rockglacier should therefore not be interpreted as a permafrost signal. Conversely, long‐term degradation phenomena in terms of warming of massive ground ice at the permafrost table are detectable by ERTM. Copyright © 2009 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice ice core permafrost Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes 20 3 269 284 |
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Wiley Online Library |
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English |
description |
Abstract The inversion and interpretation of electrical resistivity tomography (ERT) data from coarse blocky and ice‐rich permafrost sites are challenging due to strong resistivity contrasts and high contact resistances. To assess temporal changes during ERT monitoring (ERTM), corresponding inversion artefacts have to be separated from true subsurface changes. Appraisal techniques serve to analyse an ERTM data set from a rockglacier, including synthetic modelling, the depth of investigation index technique and the so‐called resolution matrix approach. The application of these methods led step by step to the identification of unreliable model regions and thus to the improvement in interpretation of temporal resistivity changes. An important result is that resistivity values of model regions with strong resistivity contrasts and highly resistive features are generally of critical reliability, and resistivity changes within or below the ice core of a rockglacier should therefore not be interpreted as a permafrost signal. Conversely, long‐term degradation phenomena in terms of warming of massive ground ice at the permafrost table are detectable by ERTM. Copyright © 2009 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Hilbich, C. Marescot, L. Hauck, C. Loke, M. H. Mäusbacher, R. |
spellingShingle |
Hilbich, C. Marescot, L. Hauck, C. Loke, M. H. Mäusbacher, R. Applicability of electrical resistivity tomography monitoring to coarse blocky and ice‐rich permafrost landforms |
author_facet |
Hilbich, C. Marescot, L. Hauck, C. Loke, M. H. Mäusbacher, R. |
author_sort |
Hilbich, C. |
title |
Applicability of electrical resistivity tomography monitoring to coarse blocky and ice‐rich permafrost landforms |
title_short |
Applicability of electrical resistivity tomography monitoring to coarse blocky and ice‐rich permafrost landforms |
title_full |
Applicability of electrical resistivity tomography monitoring to coarse blocky and ice‐rich permafrost landforms |
title_fullStr |
Applicability of electrical resistivity tomography monitoring to coarse blocky and ice‐rich permafrost landforms |
title_full_unstemmed |
Applicability of electrical resistivity tomography monitoring to coarse blocky and ice‐rich permafrost landforms |
title_sort |
applicability of electrical resistivity tomography monitoring to coarse blocky and ice‐rich permafrost landforms |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1002/ppp.652 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.652 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.652 |
genre |
Ice ice core permafrost Permafrost and Periglacial Processes |
genre_facet |
Ice ice core permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 20, issue 3, page 269-284 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.652 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
20 |
container_issue |
3 |
container_start_page |
269 |
op_container_end_page |
284 |
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1809914077419405312 |