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...
Published in: | Arctic Science |
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Canadian Science Publishing
2017
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Online Access: | https://doi.org/10.1139/as-2016-0018 https://doaj.org/article/2579f02ae7d3410285c511f6b2d3c29c |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:2579f02ae7d3410285c511f6b2d3c29c 2023-05-15T14:22:18+02:00 Syngenetic dynamic of permafrost of a polar desert solifluction lobe, Ward Hunt Island, Nunavut Manuel Verpaelst Daniel Fortier Mikhail Kanevskiy Michel Paquette Yuri Shur 2017-06-01 https://doi.org/10.1139/as-2016-0018 https://doaj.org/article/2579f02ae7d3410285c511f6b2d3c29c en fr eng fre Canadian Science Publishing doi:10.1139/as-2016-0018 2368-7460 https://doaj.org/article/2579f02ae7d3410285c511f6b2d3c29c undefined Arctic Science, Vol 3, Iss 2, Pp 301-319 (2017) solifluction lobe cryostratigraphy syngenetic permafrost ground ice polar desert geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.1139/as-2016-0018 2023-01-22T17:52:28Z 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 Unknown Nunavut Ward Hunt Island ENVELOPE(-74.161,-74.161,83.102,83.102) Arctic Science 3 2 301 319 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English French |
topic |
solifluction lobe cryostratigraphy syngenetic permafrost ground ice polar desert geo envir |
spellingShingle |
solifluction lobe cryostratigraphy syngenetic permafrost ground ice polar desert geo envir Manuel Verpaelst Daniel Fortier Mikhail Kanevskiy Michel Paquette Yuri Shur Syngenetic dynamic of permafrost of a polar desert solifluction lobe, Ward Hunt Island, Nunavut |
topic_facet |
solifluction lobe cryostratigraphy syngenetic permafrost ground ice polar desert geo envir |
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 |
Manuel Verpaelst Daniel Fortier Mikhail Kanevskiy Michel Paquette Yuri Shur |
author_facet |
Manuel Verpaelst Daniel Fortier Mikhail Kanevskiy Michel Paquette Yuri Shur |
author_sort |
Manuel Verpaelst |
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 |
https://doi.org/10.1139/as-2016-0018 https://doaj.org/article/2579f02ae7d3410285c511f6b2d3c29c |
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, Vol 3, Iss 2, Pp 301-319 (2017) |
op_relation |
doi:10.1139/as-2016-0018 2368-7460 https://doaj.org/article/2579f02ae7d3410285c511f6b2d3c29c |
op_rights |
undefined |
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_ |
1766294944135249920 |