Long-term, high-resolution permafrost monitoring reveals coupled energy balance and hydrogeologic controls on talik dynamics near umiujaq (Nunavik, Québec, Canada)
Rising temperatures in the Arctic and subarctic are driving the rapid thaw of permafrost by reducing permafrost cooling, increasing active layer thickness, and promoting talik formation. In this study, the cyrohydrogeology of a permafrost mound located within the discontinuous permafrost zone near U...
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American Geophysical Union
2023
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Online Access: | https://hdl.handle.net/20.500.11794/118563 https://doi.org/10.1029/2022WR032456 |
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ftunivlavalcorp:oai:corpus.ulaval.ca:20.500.11794/118563 2024-09-09T18:55:05+00:00 Long-term, high-resolution permafrost monitoring reveals coupled energy balance and hydrogeologic controls on talik dynamics near umiujaq (Nunavik, Québec, Canada) Fortier, Philippe Young, Nathan Lee Lemieux, Jean-Michel Walvoord, Michelle A. Fortier, Richard Québec (Province) -- Umiujaq 2023-05-26T21:50:17Z application/pdf https://hdl.handle.net/20.500.11794/118563 https://doi.org/10.1029/2022WR032456 eng eng American Geophysical Union 0043-1397 http://hdl.handle.net/20.500.11794/118563 doi:10.1029/2022WR032456 http://purl.org/coar/access_right/c_abf2 Taliks Pergélisols Chaleur -- Transmission Bilan énergétique (Géophysique) Hydrogéologie article 2023 ftunivlavalcorp https://doi.org/20.500.11794/11856310.1029/2022WR032456 2024-06-17T23:42:35Z Rising temperatures in the Arctic and subarctic are driving the rapid thaw of permafrost by reducing permafrost cooling, increasing active layer thickness, and promoting talik formation. In this study, the cyrohydrogeology of a permafrost mound located within the discontinuous permafrost zone near Umiujaq (Nunavik, Québec, Canada) is characterized through the analysis of a dataset covering more than two decades of monitoring. This dataset captures a high degree of interannual variability in air temperature and ground thermal conditions, as well as the formation and closure of a supra-permafrost talik. Data indicate that variable saturation and advective heat transport directly contribute to the expansion and contraction of the talik. Data further indicate the presence of two distinct thermo-hydrologic settings resulting from differences in surface conditions, as well as subsurface thermal and flow regimes. The first, found at the top of the mound feature, is characterized by very low moisture contents (<0.05 m3/m3), while the second, found at the side of the mound feature, shows higher annual moisture contents that strongly influence the dynamics of heat and groundwater flow. The data were synthesized into a detailed conceptual model of the cyrohydrogeological dynamics that highlights the important role of hydrogeological characterization and long-term data sets in understanding the effects of groundwater flow on seasonal frost and permafrost dynamics. Specifically, the results presented here show that in the absence of long-term data sets, longer-period transient phenomena such as talik opening and closure may be misrepresented as uni-directional feedback loops, as opposed to highly dynamic temporary phenomena. Article in Journal/Newspaper Active layer thickness Arctic permafrost Subarctic Talik Umiujaq Nunavik Université Laval: CorpusUL Arctic Canada Nunavik Talik ENVELOPE(146.601,146.601,59.667,59.667) Umiujaq ENVELOPE(-76.549,-76.549,56.553,56.553) Water Resources Research 59 1 |
institution |
Open Polar |
collection |
Université Laval: CorpusUL |
op_collection_id |
ftunivlavalcorp |
language |
English |
topic |
Taliks Pergélisols Chaleur -- Transmission Bilan énergétique (Géophysique) Hydrogéologie |
spellingShingle |
Taliks Pergélisols Chaleur -- Transmission Bilan énergétique (Géophysique) Hydrogéologie Fortier, Philippe Young, Nathan Lee Lemieux, Jean-Michel Walvoord, Michelle A. Fortier, Richard Long-term, high-resolution permafrost monitoring reveals coupled energy balance and hydrogeologic controls on talik dynamics near umiujaq (Nunavik, Québec, Canada) |
topic_facet |
Taliks Pergélisols Chaleur -- Transmission Bilan énergétique (Géophysique) Hydrogéologie |
description |
Rising temperatures in the Arctic and subarctic are driving the rapid thaw of permafrost by reducing permafrost cooling, increasing active layer thickness, and promoting talik formation. In this study, the cyrohydrogeology of a permafrost mound located within the discontinuous permafrost zone near Umiujaq (Nunavik, Québec, Canada) is characterized through the analysis of a dataset covering more than two decades of monitoring. This dataset captures a high degree of interannual variability in air temperature and ground thermal conditions, as well as the formation and closure of a supra-permafrost talik. Data indicate that variable saturation and advective heat transport directly contribute to the expansion and contraction of the talik. Data further indicate the presence of two distinct thermo-hydrologic settings resulting from differences in surface conditions, as well as subsurface thermal and flow regimes. The first, found at the top of the mound feature, is characterized by very low moisture contents (<0.05 m3/m3), while the second, found at the side of the mound feature, shows higher annual moisture contents that strongly influence the dynamics of heat and groundwater flow. The data were synthesized into a detailed conceptual model of the cyrohydrogeological dynamics that highlights the important role of hydrogeological characterization and long-term data sets in understanding the effects of groundwater flow on seasonal frost and permafrost dynamics. Specifically, the results presented here show that in the absence of long-term data sets, longer-period transient phenomena such as talik opening and closure may be misrepresented as uni-directional feedback loops, as opposed to highly dynamic temporary phenomena. |
format |
Article in Journal/Newspaper |
author |
Fortier, Philippe Young, Nathan Lee Lemieux, Jean-Michel Walvoord, Michelle A. Fortier, Richard |
author_facet |
Fortier, Philippe Young, Nathan Lee Lemieux, Jean-Michel Walvoord, Michelle A. Fortier, Richard |
author_sort |
Fortier, Philippe |
title |
Long-term, high-resolution permafrost monitoring reveals coupled energy balance and hydrogeologic controls on talik dynamics near umiujaq (Nunavik, Québec, Canada) |
title_short |
Long-term, high-resolution permafrost monitoring reveals coupled energy balance and hydrogeologic controls on talik dynamics near umiujaq (Nunavik, Québec, Canada) |
title_full |
Long-term, high-resolution permafrost monitoring reveals coupled energy balance and hydrogeologic controls on talik dynamics near umiujaq (Nunavik, Québec, Canada) |
title_fullStr |
Long-term, high-resolution permafrost monitoring reveals coupled energy balance and hydrogeologic controls on talik dynamics near umiujaq (Nunavik, Québec, Canada) |
title_full_unstemmed |
Long-term, high-resolution permafrost monitoring reveals coupled energy balance and hydrogeologic controls on talik dynamics near umiujaq (Nunavik, Québec, Canada) |
title_sort |
long-term, high-resolution permafrost monitoring reveals coupled energy balance and hydrogeologic controls on talik dynamics near umiujaq (nunavik, québec, canada) |
publisher |
American Geophysical Union |
publishDate |
2023 |
url |
https://hdl.handle.net/20.500.11794/118563 https://doi.org/10.1029/2022WR032456 |
op_coverage |
Québec (Province) -- Umiujaq |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) ENVELOPE(-76.549,-76.549,56.553,56.553) |
geographic |
Arctic Canada Nunavik Talik Umiujaq |
geographic_facet |
Arctic Canada Nunavik Talik Umiujaq |
genre |
Active layer thickness Arctic permafrost Subarctic Talik Umiujaq Nunavik |
genre_facet |
Active layer thickness Arctic permafrost Subarctic Talik Umiujaq Nunavik |
op_relation |
0043-1397 http://hdl.handle.net/20.500.11794/118563 doi:10.1029/2022WR032456 |
op_rights |
http://purl.org/coar/access_right/c_abf2 |
op_doi |
https://doi.org/20.500.11794/11856310.1029/2022WR032456 |
container_title |
Water Resources Research |
container_volume |
59 |
container_issue |
1 |
_version_ |
1809762596006395904 |