Cavity development in ice‐rich permafrost, Pangnirtung, Baffin Island, northwest territories
Abstract Cavity development in ice‐rich permafrost at Pangnirtung followed a large rainstorm and runoff event in 1984. The cavities evolved along permeable zones in sediments containing segregated ice lenses. Cavities promoted subsurface flow and incremental collapse of the ground surface. Once form...
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crwiley:10.1002/ppp.3430030404 2024-06-02T08:03:50+00:00 Cavity development in ice‐rich permafrost, Pangnirtung, Baffin Island, northwest territories Hyatt, James A. 1992 http://dx.doi.org/10.1002/ppp.3430030404 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.3430030404 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.3430030404 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 3, issue 4, page 293-313 ISSN 1045-6740 1099-1530 journal-article 1992 crwiley https://doi.org/10.1002/ppp.3430030404 2024-05-03T11:29:16Z Abstract Cavity development in ice‐rich permafrost at Pangnirtung followed a large rainstorm and runoff event in 1984. The cavities evolved along permeable zones in sediments containing segregated ice lenses. Cavities promoted subsurface flow and incremental collapse of the ground surface. Once formed, cavities remained relatively stable where they were free to drain, and where the enclosing ground remained frozen and rigid support was provided. Some cavities closed by infilling with sediment or freezing water, or by deformation of the surrounding frozen ground. Other cavities were enlarged by thermo‐erosional piping, a process involving both thermal and mechanical erosion of frozen ground together with sufficiently rapid throughflow to prevent refreezing. A classification of cavities in permafrost permits qualitative appraisal of their stability with respect to the depth of zero annual temperature change and the degree of natural arching support. Assessment based on elastic plate theory indicates that seasonal temperature changes are important factors in destabilizing near‐surface cavities. Article in Journal/Newspaper Baffin Island Baffin Ice Northwest Territories permafrost Permafrost and Periglacial Processes Wiley Online Library Baffin Island Northwest Territories Pangnirtung ENVELOPE(-65.707,-65.707,66.145,66.145) Permafrost and Periglacial Processes 3 4 293 313 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Cavity development in ice‐rich permafrost at Pangnirtung followed a large rainstorm and runoff event in 1984. The cavities evolved along permeable zones in sediments containing segregated ice lenses. Cavities promoted subsurface flow and incremental collapse of the ground surface. Once formed, cavities remained relatively stable where they were free to drain, and where the enclosing ground remained frozen and rigid support was provided. Some cavities closed by infilling with sediment or freezing water, or by deformation of the surrounding frozen ground. Other cavities were enlarged by thermo‐erosional piping, a process involving both thermal and mechanical erosion of frozen ground together with sufficiently rapid throughflow to prevent refreezing. A classification of cavities in permafrost permits qualitative appraisal of their stability with respect to the depth of zero annual temperature change and the degree of natural arching support. Assessment based on elastic plate theory indicates that seasonal temperature changes are important factors in destabilizing near‐surface cavities. |
format |
Article in Journal/Newspaper |
author |
Hyatt, James A. |
spellingShingle |
Hyatt, James A. Cavity development in ice‐rich permafrost, Pangnirtung, Baffin Island, northwest territories |
author_facet |
Hyatt, James A. |
author_sort |
Hyatt, James A. |
title |
Cavity development in ice‐rich permafrost, Pangnirtung, Baffin Island, northwest territories |
title_short |
Cavity development in ice‐rich permafrost, Pangnirtung, Baffin Island, northwest territories |
title_full |
Cavity development in ice‐rich permafrost, Pangnirtung, Baffin Island, northwest territories |
title_fullStr |
Cavity development in ice‐rich permafrost, Pangnirtung, Baffin Island, northwest territories |
title_full_unstemmed |
Cavity development in ice‐rich permafrost, Pangnirtung, Baffin Island, northwest territories |
title_sort |
cavity development in ice‐rich permafrost, pangnirtung, baffin island, northwest territories |
publisher |
Wiley |
publishDate |
1992 |
url |
http://dx.doi.org/10.1002/ppp.3430030404 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.3430030404 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.3430030404 |
long_lat |
ENVELOPE(-65.707,-65.707,66.145,66.145) |
geographic |
Baffin Island Northwest Territories Pangnirtung |
geographic_facet |
Baffin Island Northwest Territories Pangnirtung |
genre |
Baffin Island Baffin Ice Northwest Territories permafrost Permafrost and Periglacial Processes |
genre_facet |
Baffin Island Baffin Ice Northwest Territories permafrost Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 3, issue 4, page 293-313 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.3430030404 |
container_title |
Permafrost and Periglacial Processes |
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3 |
container_issue |
4 |
container_start_page |
293 |
op_container_end_page |
313 |
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1800748444040560640 |