Hillslope erosional features and permafrost dynamics along infrastructure in the Arctic Foothills, Alaska
Abstract Abrupt thaw of ice‐rich permafrost in the Arctic Foothills yielded to the formation of hillslope erosional features. In the infrastructure corridor, we observed thermal erosion and thaw slumping that self‐healed near an embankment. To advance our understanding of processes between infrastru...
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crwiley:10.1002/ppp.2188 2024-06-02T08:01:41+00:00 Hillslope erosional features and permafrost dynamics along infrastructure in the Arctic Foothills, Alaska Stephani, Eva Darrow, Margaret M. Kanevskiy, Mikhail Wuttig, Frank Daanen, Ronald P. Schwarber, Jaimy A. Doré, Guy Shur, Yuri Jorgenson, Mark T. Croft, Peppi Drage, Jeremiah S. Natural Sciences and Engineering Research Council of Canada National Science Foundation 2023 http://dx.doi.org/10.1002/ppp.2188 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/ppp.2188 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2188 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 34, issue 2, page 208-228 ISSN 1045-6740 1099-1530 journal-article 2023 crwiley https://doi.org/10.1002/ppp.2188 2024-05-03T11:30:21Z Abstract Abrupt thaw of ice‐rich permafrost in the Arctic Foothills yielded to the formation of hillslope erosional features. In the infrastructure corridor, we observed thermal erosion and thaw slumping that self‐healed near an embankment. To advance our understanding of processes between infrastructure and hillslope erosional features (INF‐HEF), we combined climate and remote sensing analyses to field investigations to assess an INF‐HEF system and validate our findings in a broader area along the infrastructure corridor. We identified that thaw consolidation along an embankment formed a thermokarst ditch that was ubiquitous in the broader study area, and which was extensively affected by shrubification and supported other positive feedback (e.g., snow accumulation, water impoundment, and weakened vegetation mat). The thermokarst ditch facilitated channelization of cross‐drainage water, thus increasing the terrain vulnerability to thermal erosion that evolved into thaw slumping after heavy rainfalls. The terrain resilience to thaw slumping benefited from the type of ground ice and topography prevailing at our site. The lateral discontinuity of massive ice in an ice‐wedge polygonal system (i.e., interchange soil and massive ice) compounded to a low‐slope gradient with topographic obstacles (e.g., baydzherakhs) decreased slumping activity and supported self‐stabilization. Article in Journal/Newspaper Arctic Ice permafrost Permafrost and Periglacial Processes Thermokarst wedge* Alaska Wiley Online Library Arctic Permafrost and Periglacial Processes 34 2 208 228 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Abrupt thaw of ice‐rich permafrost in the Arctic Foothills yielded to the formation of hillslope erosional features. In the infrastructure corridor, we observed thermal erosion and thaw slumping that self‐healed near an embankment. To advance our understanding of processes between infrastructure and hillslope erosional features (INF‐HEF), we combined climate and remote sensing analyses to field investigations to assess an INF‐HEF system and validate our findings in a broader area along the infrastructure corridor. We identified that thaw consolidation along an embankment formed a thermokarst ditch that was ubiquitous in the broader study area, and which was extensively affected by shrubification and supported other positive feedback (e.g., snow accumulation, water impoundment, and weakened vegetation mat). The thermokarst ditch facilitated channelization of cross‐drainage water, thus increasing the terrain vulnerability to thermal erosion that evolved into thaw slumping after heavy rainfalls. The terrain resilience to thaw slumping benefited from the type of ground ice and topography prevailing at our site. The lateral discontinuity of massive ice in an ice‐wedge polygonal system (i.e., interchange soil and massive ice) compounded to a low‐slope gradient with topographic obstacles (e.g., baydzherakhs) decreased slumping activity and supported self‐stabilization. |
author2 |
Natural Sciences and Engineering Research Council of Canada National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Stephani, Eva Darrow, Margaret M. Kanevskiy, Mikhail Wuttig, Frank Daanen, Ronald P. Schwarber, Jaimy A. Doré, Guy Shur, Yuri Jorgenson, Mark T. Croft, Peppi Drage, Jeremiah S. |
spellingShingle |
Stephani, Eva Darrow, Margaret M. Kanevskiy, Mikhail Wuttig, Frank Daanen, Ronald P. Schwarber, Jaimy A. Doré, Guy Shur, Yuri Jorgenson, Mark T. Croft, Peppi Drage, Jeremiah S. Hillslope erosional features and permafrost dynamics along infrastructure in the Arctic Foothills, Alaska |
author_facet |
Stephani, Eva Darrow, Margaret M. Kanevskiy, Mikhail Wuttig, Frank Daanen, Ronald P. Schwarber, Jaimy A. Doré, Guy Shur, Yuri Jorgenson, Mark T. Croft, Peppi Drage, Jeremiah S. |
author_sort |
Stephani, Eva |
title |
Hillslope erosional features and permafrost dynamics along infrastructure in the Arctic Foothills, Alaska |
title_short |
Hillslope erosional features and permafrost dynamics along infrastructure in the Arctic Foothills, Alaska |
title_full |
Hillslope erosional features and permafrost dynamics along infrastructure in the Arctic Foothills, Alaska |
title_fullStr |
Hillslope erosional features and permafrost dynamics along infrastructure in the Arctic Foothills, Alaska |
title_full_unstemmed |
Hillslope erosional features and permafrost dynamics along infrastructure in the Arctic Foothills, Alaska |
title_sort |
hillslope erosional features and permafrost dynamics along infrastructure in the arctic foothills, alaska |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/ppp.2188 https://onlinelibrary.wiley.com/doi/am-pdf/10.1002/ppp.2188 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2188 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Ice permafrost Permafrost and Periglacial Processes Thermokarst wedge* Alaska |
genre_facet |
Arctic Ice permafrost Permafrost and Periglacial Processes Thermokarst wedge* Alaska |
op_source |
Permafrost and Periglacial Processes volume 34, issue 2, page 208-228 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#am http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.2188 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
34 |
container_issue |
2 |
container_start_page |
208 |
op_container_end_page |
228 |
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1800746084340858880 |