Observation of rapid drainage system development by thermal erosion of ice wedges on Bylot Island, Canadian Arctic Archipelago
Abstract Rapid development of a new drainage system was observed on Bylot Island. A 750‐m long gully system was eroded in four years. The process was initiated by the formation of sinkholes eroded in ice wedges by runoff flowing into open frost cracks. The sinkholes evolved into underground tunnels...
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crwiley:10.1002/ppp.595 2024-06-23T07:48:51+00:00 Observation of rapid drainage system development by thermal erosion of ice wedges on Bylot Island, Canadian Arctic Archipelago Fortier, Daniel Allard, Michel Shur, Yuri 2007 http://dx.doi.org/10.1002/ppp.595 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.595 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.595 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 18, issue 3, page 229-243 ISSN 1045-6740 1099-1530 journal-article 2007 crwiley https://doi.org/10.1002/ppp.595 2024-06-13T04:23:02Z Abstract Rapid development of a new drainage system was observed on Bylot Island. A 750‐m long gully system was eroded in four years. The process was initiated by the formation of sinkholes eroded in ice wedges by runoff flowing into open frost cracks. The sinkholes evolved into underground tunnels cut in the ice‐wedge network and the ice‐rich permafrost. Widening of tunnels was followed by subsidence and collapse of their roofs and the development of open gullies. The drainage generally developed as the shortest line along the regional slope with some deviations caused by collapse of blocks of soil which temporarily obstructed the water flow. Retrogressive scarps exposed to flowing water retreated at maximum rates of up to 5 m/day for a total of 15 to 50 m during the summer. Scarps exposed to atmospheric heat and solar radiation retreated between 2.5 and 40 m over four summers with a mean of 15.5 m. Such slopes had nearly stabilised after four years with a retreat rate of only a few centimetres per year in the last year of observation. Copyright © 2007 John Wiley & Sons, Ltd. Article in Journal/Newspaper Arctic Archipelago Arctic Bylot Island Canadian Arctic Archipelago Ice permafrost Permafrost and Periglacial Processes wedge* Wiley Online Library Arctic Bylot Island Canadian Arctic Archipelago Permafrost and Periglacial Processes 18 3 229 243 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Rapid development of a new drainage system was observed on Bylot Island. A 750‐m long gully system was eroded in four years. The process was initiated by the formation of sinkholes eroded in ice wedges by runoff flowing into open frost cracks. The sinkholes evolved into underground tunnels cut in the ice‐wedge network and the ice‐rich permafrost. Widening of tunnels was followed by subsidence and collapse of their roofs and the development of open gullies. The drainage generally developed as the shortest line along the regional slope with some deviations caused by collapse of blocks of soil which temporarily obstructed the water flow. Retrogressive scarps exposed to flowing water retreated at maximum rates of up to 5 m/day for a total of 15 to 50 m during the summer. Scarps exposed to atmospheric heat and solar radiation retreated between 2.5 and 40 m over four summers with a mean of 15.5 m. Such slopes had nearly stabilised after four years with a retreat rate of only a few centimetres per year in the last year of observation. Copyright © 2007 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Fortier, Daniel Allard, Michel Shur, Yuri |
spellingShingle |
Fortier, Daniel Allard, Michel Shur, Yuri Observation of rapid drainage system development by thermal erosion of ice wedges on Bylot Island, Canadian Arctic Archipelago |
author_facet |
Fortier, Daniel Allard, Michel Shur, Yuri |
author_sort |
Fortier, Daniel |
title |
Observation of rapid drainage system development by thermal erosion of ice wedges on Bylot Island, Canadian Arctic Archipelago |
title_short |
Observation of rapid drainage system development by thermal erosion of ice wedges on Bylot Island, Canadian Arctic Archipelago |
title_full |
Observation of rapid drainage system development by thermal erosion of ice wedges on Bylot Island, Canadian Arctic Archipelago |
title_fullStr |
Observation of rapid drainage system development by thermal erosion of ice wedges on Bylot Island, Canadian Arctic Archipelago |
title_full_unstemmed |
Observation of rapid drainage system development by thermal erosion of ice wedges on Bylot Island, Canadian Arctic Archipelago |
title_sort |
observation of rapid drainage system development by thermal erosion of ice wedges on bylot island, canadian arctic archipelago |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1002/ppp.595 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.595 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.595 |
geographic |
Arctic Bylot Island Canadian Arctic Archipelago |
geographic_facet |
Arctic Bylot Island Canadian Arctic Archipelago |
genre |
Arctic Archipelago Arctic Bylot Island Canadian Arctic Archipelago Ice permafrost Permafrost and Periglacial Processes wedge* |
genre_facet |
Arctic Archipelago Arctic Bylot Island Canadian Arctic Archipelago Ice permafrost Permafrost and Periglacial Processes wedge* |
op_source |
Permafrost and Periglacial Processes volume 18, issue 3, page 229-243 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.595 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
18 |
container_issue |
3 |
container_start_page |
229 |
op_container_end_page |
243 |
_version_ |
1802639181023805440 |