Combination of conventional geophysical methods for sounding the composition of rock glaciers in the Swiss Alps
The composition of rock glaciers was sounded by a combination of conventional geophysical methods near the lower limit of mountain permafrost in the Swiss Alps. P‐wave velocity, direct current (DC) resistivity and year‐round ground surface temperatures were measured on 32 talus‐derived rock glaciers...
Published in: | Permafrost and Periglacial Processes |
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Language: | unknown |
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Online Access: | https://doi.org/10.1002/ppp.550 |
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ftrepec:oai:RePEc:wly:perpro:v:17:y:2006:i:1:p:35-48 2023-05-15T16:37:06+02:00 Combination of conventional geophysical methods for sounding the composition of rock glaciers in the Swiss Alps Atsushi Ikeda https://doi.org/10.1002/ppp.550 unknown https://doi.org/10.1002/ppp.550 article ftrepec https://doi.org/10.1002/ppp.550 2020-12-04T13:31:03Z The composition of rock glaciers was sounded by a combination of conventional geophysical methods near the lower limit of mountain permafrost in the Swiss Alps. P‐wave velocity, direct current (DC) resistivity and year‐round ground surface temperatures were measured on 32 talus‐derived rock glaciers. Subsurface P‐wave velocities differ significantly between non‐vegetated (probably active/inactive) rock glaciers and vegetated (probably relict) rock glaciers. DC resistivities reflect structural differences in the rock glaciers (e.g. bouldery or pebbly, ice‐cemented or highly ice‐rich) rather than thermal differences (i.e. frozen or unfrozen). The combination of these methods provides reliable thermal and structural information on subsurface deposits. In addition, mean annual ground surface temperatures are equally good indicators of the distribution of permafrost as bottom temperatures of snow. Copyright © 2006 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice permafrost RePEc (Research Papers in Economics) Permafrost and Periglacial Processes 17 1 35 48 |
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Open Polar |
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RePEc (Research Papers in Economics) |
op_collection_id |
ftrepec |
language |
unknown |
description |
The composition of rock glaciers was sounded by a combination of conventional geophysical methods near the lower limit of mountain permafrost in the Swiss Alps. P‐wave velocity, direct current (DC) resistivity and year‐round ground surface temperatures were measured on 32 talus‐derived rock glaciers. Subsurface P‐wave velocities differ significantly between non‐vegetated (probably active/inactive) rock glaciers and vegetated (probably relict) rock glaciers. DC resistivities reflect structural differences in the rock glaciers (e.g. bouldery or pebbly, ice‐cemented or highly ice‐rich) rather than thermal differences (i.e. frozen or unfrozen). The combination of these methods provides reliable thermal and structural information on subsurface deposits. In addition, mean annual ground surface temperatures are equally good indicators of the distribution of permafrost as bottom temperatures of snow. Copyright © 2006 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Atsushi Ikeda |
spellingShingle |
Atsushi Ikeda Combination of conventional geophysical methods for sounding the composition of rock glaciers in the Swiss Alps |
author_facet |
Atsushi Ikeda |
author_sort |
Atsushi Ikeda |
title |
Combination of conventional geophysical methods for sounding the composition of rock glaciers in the Swiss Alps |
title_short |
Combination of conventional geophysical methods for sounding the composition of rock glaciers in the Swiss Alps |
title_full |
Combination of conventional geophysical methods for sounding the composition of rock glaciers in the Swiss Alps |
title_fullStr |
Combination of conventional geophysical methods for sounding the composition of rock glaciers in the Swiss Alps |
title_full_unstemmed |
Combination of conventional geophysical methods for sounding the composition of rock glaciers in the Swiss Alps |
title_sort |
combination of conventional geophysical methods for sounding the composition of rock glaciers in the swiss alps |
url |
https://doi.org/10.1002/ppp.550 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_relation |
https://doi.org/10.1002/ppp.550 |
op_doi |
https://doi.org/10.1002/ppp.550 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
17 |
container_issue |
1 |
container_start_page |
35 |
op_container_end_page |
48 |
_version_ |
1766027394731212800 |