Syngenetic dynamic of permafrost of a polar desert solifluction lobe, Ward Hunt Island, Nunavut
Repeated freeze–thaw cycles on slopes trigger sorting and solifluction mass movements, while subsequent displacement of material modifies the geomorphology of slopes as well as permafrost dynamics. This study focuses on the geomorphology and the cryostratigraphy of a polar desert stone-banked solifl...
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2017
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crcansciencepubl:10.1139/as-2016-0018 2023-12-17T10:22:55+01:00 Syngenetic dynamic of permafrost of a polar desert solifluction lobe, Ward Hunt Island, Nunavut Verpaelst, Manuel Fortier, Daniel Kanevskiy, Mikhail Paquette, Michel Shur, Yuri 2017 http://dx.doi.org/10.1139/as-2016-0018 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2016-0018 https://cdnsciencepub.com/doi/pdf/10.1139/as-2016-0018 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Arctic Science volume 3, issue 2, page 301-319 ISSN 2368-7460 2368-7460 General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science journal-article 2017 crcansciencepubl https://doi.org/10.1139/as-2016-0018 2023-11-19T13:38:48Z Repeated freeze–thaw cycles on slopes trigger sorting and solifluction mass movements, while subsequent displacement of material modifies the geomorphology of slopes as well as permafrost dynamics. This study focuses on the geomorphology and the cryostratigraphy of a polar desert stone-banked solifluction lobe with the objective to clarify the impact of slow mass movements on ground ice aggradation. The morphology of the solifluction lobe was characterized by peripheral ridges of coarse gravel, partially surrounding a depression filled with finer sediments saturated with water and covered by organics. Cryostratigraphic analysis demonstrated that the solifluction lobe’s formation led to the development of a syngenetic layer of permafrost with an ice content that varied according to the location in the lobe. The ice-rich cryofacies formed in the central depression of the lobe should act as a buffer to potential active layer deepening, slowing down its thawing, whereas the ice-poor cryofacies formed under the ridges is expected to thaw faster than the central depression under climate warming scenarios. Thawing of the ice-rich zone in the future will result in differential thaw subsidence between the ridges and the central depression of solifluction lobes, along with increased drainage through the ridges and subsequent changes in hydrology. Article in Journal/Newspaper Arctic Ice Nunavut permafrost polar desert Ward Hunt Island Canadian Science Publishing (via Crossref) Nunavut Ward Hunt Island ENVELOPE(-74.161,-74.161,83.102,83.102) Arctic Science 3 2 301 319 |
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Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science |
spellingShingle |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science Verpaelst, Manuel Fortier, Daniel Kanevskiy, Mikhail Paquette, Michel Shur, Yuri Syngenetic dynamic of permafrost of a polar desert solifluction lobe, Ward Hunt Island, Nunavut |
topic_facet |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science |
description |
Repeated freeze–thaw cycles on slopes trigger sorting and solifluction mass movements, while subsequent displacement of material modifies the geomorphology of slopes as well as permafrost dynamics. This study focuses on the geomorphology and the cryostratigraphy of a polar desert stone-banked solifluction lobe with the objective to clarify the impact of slow mass movements on ground ice aggradation. The morphology of the solifluction lobe was characterized by peripheral ridges of coarse gravel, partially surrounding a depression filled with finer sediments saturated with water and covered by organics. Cryostratigraphic analysis demonstrated that the solifluction lobe’s formation led to the development of a syngenetic layer of permafrost with an ice content that varied according to the location in the lobe. The ice-rich cryofacies formed in the central depression of the lobe should act as a buffer to potential active layer deepening, slowing down its thawing, whereas the ice-poor cryofacies formed under the ridges is expected to thaw faster than the central depression under climate warming scenarios. Thawing of the ice-rich zone in the future will result in differential thaw subsidence between the ridges and the central depression of solifluction lobes, along with increased drainage through the ridges and subsequent changes in hydrology. |
format |
Article in Journal/Newspaper |
author |
Verpaelst, Manuel Fortier, Daniel Kanevskiy, Mikhail Paquette, Michel Shur, Yuri |
author_facet |
Verpaelst, Manuel Fortier, Daniel Kanevskiy, Mikhail Paquette, Michel Shur, Yuri |
author_sort |
Verpaelst, Manuel |
title |
Syngenetic dynamic of permafrost of a polar desert solifluction lobe, Ward Hunt Island, Nunavut |
title_short |
Syngenetic dynamic of permafrost of a polar desert solifluction lobe, Ward Hunt Island, Nunavut |
title_full |
Syngenetic dynamic of permafrost of a polar desert solifluction lobe, Ward Hunt Island, Nunavut |
title_fullStr |
Syngenetic dynamic of permafrost of a polar desert solifluction lobe, Ward Hunt Island, Nunavut |
title_full_unstemmed |
Syngenetic dynamic of permafrost of a polar desert solifluction lobe, Ward Hunt Island, Nunavut |
title_sort |
syngenetic dynamic of permafrost of a polar desert solifluction lobe, ward hunt island, nunavut |
publisher |
Canadian Science Publishing |
publishDate |
2017 |
url |
http://dx.doi.org/10.1139/as-2016-0018 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2016-0018 https://cdnsciencepub.com/doi/pdf/10.1139/as-2016-0018 |
long_lat |
ENVELOPE(-74.161,-74.161,83.102,83.102) |
geographic |
Nunavut Ward Hunt Island |
geographic_facet |
Nunavut Ward Hunt Island |
genre |
Arctic Ice Nunavut permafrost polar desert Ward Hunt Island |
genre_facet |
Arctic Ice Nunavut permafrost polar desert Ward Hunt Island |
op_source |
Arctic Science volume 3, issue 2, page 301-319 ISSN 2368-7460 2368-7460 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/as-2016-0018 |
container_title |
Arctic Science |
container_volume |
3 |
container_issue |
2 |
container_start_page |
301 |
op_container_end_page |
319 |
_version_ |
1785554488389533696 |