Applicability of Electrical Resistivity Tomography Monitoring to Coarse Blocky
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 artefac...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.466.7846 2023-05-15T16:36:55+02:00 Applicability of Electrical Resistivity Tomography Monitoring to Coarse Blocky C. Hilbich L. Marescot C. Hauck M. H. Loke The Pennsylvania State University CiteSeerX Archives 2009 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.466.7846 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.466.7846 Metadata may be used without restrictions as long as the oai identifier remains attached to it. https://doc.rero.ch/record/13179/files/hauck_aer.pdf electrical resistivity tomography (ERT Murtèl rockglacier depth of investigation (DOI) index resolution text 2009 ftciteseerx 2016-10-09T00:06:22Z 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. Text Ice ice core permafrost Unknown |
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language |
English |
topic |
electrical resistivity tomography (ERT Murtèl rockglacier depth of investigation (DOI) index resolution |
spellingShingle |
electrical resistivity tomography (ERT Murtèl rockglacier depth of investigation (DOI) index resolution C. Hilbich L. Marescot C. Hauck M. H. Loke Applicability of Electrical Resistivity Tomography Monitoring to Coarse Blocky |
topic_facet |
electrical resistivity tomography (ERT Murtèl rockglacier depth of investigation (DOI) index resolution |
description |
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. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
C. Hilbich L. Marescot C. Hauck M. H. Loke |
author_facet |
C. Hilbich L. Marescot C. Hauck M. H. Loke |
author_sort |
C. Hilbich |
title |
Applicability of Electrical Resistivity Tomography Monitoring to Coarse Blocky |
title_short |
Applicability of Electrical Resistivity Tomography Monitoring to Coarse Blocky |
title_full |
Applicability of Electrical Resistivity Tomography Monitoring to Coarse Blocky |
title_fullStr |
Applicability of Electrical Resistivity Tomography Monitoring to Coarse Blocky |
title_full_unstemmed |
Applicability of Electrical Resistivity Tomography Monitoring to Coarse Blocky |
title_sort |
applicability of electrical resistivity tomography monitoring to coarse blocky |
publishDate |
2009 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.466.7846 |
genre |
Ice ice core permafrost |
genre_facet |
Ice ice core permafrost |
op_source |
https://doc.rero.ch/record/13179/files/hauck_aer.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.466.7846 |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766027230503239680 |