Numerical simulation of the impacts of climate warming on a permafrost mound
Abstract A finite‐element, one‐dimensional, heat conduction model, which takes thaw settlement into account following drainage of excess water produced by the melt of ice lenses at the permafrost boundaries, is used to assess the thermal response of a permafrost mound in Northern Québec to different...
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crwiley:10.1002/ppp.474 2024-09-15T18:11:25+00:00 Numerical simulation of the impacts of climate warming on a permafrost mound Buteau, Sylvie Fortier, Richard Delisle, Georg Allard, Michel 2004 http://dx.doi.org/10.1002/ppp.474 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.474 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.474 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 15, issue 1, page 41-57 ISSN 1045-6740 1099-1530 journal-article 2004 crwiley https://doi.org/10.1002/ppp.474 2024-07-25T04:24:07Z Abstract A finite‐element, one‐dimensional, heat conduction model, which takes thaw settlement into account following drainage of excess water produced by the melt of ice lenses at the permafrost boundaries, is used to assess the thermal response of a permafrost mound in Northern Québec to different scenarios of climate warming. In addition to the cryostratigraphy of the mound, the unfrozen water content, thermal conductivity and volumetric heat capacity of the marine sediments comprising the mound were integrated in the simulation. Warming rates from 0.03 to 0.01°C/year are predicted in the mound for a gradual linear increase in mean annual air temperature of 0.05°C/year over a 100 year period. Downward thawing occurs at the permafrost table at rates of 1–13 cm/year but there is also upward thawing from the permafrost base at rates of 2.4–5.8 cm/year. The thermal response of permafrost is not linear with time. At the end of the 100 year period, thaw settlement predicted was 1.4 m and the active layer was 3.22 m thick over a talik of 1.46 m thick. This is in comparison to an active layer of 2.14 m thick over a talik of 1.86 m if thaw settlement is not considered in the simulation. Thaw settlement, the direct result of ice melting in permafrost, brings permafrost nearer to the surface and accelerates its thawing. It should be included in any numerical simulation. Copyright © 2004 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice permafrost Permafrost and Periglacial Processes Talik Wiley Online Library Permafrost and Periglacial Processes 15 1 41 57 |
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Wiley Online Library |
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English |
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Abstract A finite‐element, one‐dimensional, heat conduction model, which takes thaw settlement into account following drainage of excess water produced by the melt of ice lenses at the permafrost boundaries, is used to assess the thermal response of a permafrost mound in Northern Québec to different scenarios of climate warming. In addition to the cryostratigraphy of the mound, the unfrozen water content, thermal conductivity and volumetric heat capacity of the marine sediments comprising the mound were integrated in the simulation. Warming rates from 0.03 to 0.01°C/year are predicted in the mound for a gradual linear increase in mean annual air temperature of 0.05°C/year over a 100 year period. Downward thawing occurs at the permafrost table at rates of 1–13 cm/year but there is also upward thawing from the permafrost base at rates of 2.4–5.8 cm/year. The thermal response of permafrost is not linear with time. At the end of the 100 year period, thaw settlement predicted was 1.4 m and the active layer was 3.22 m thick over a talik of 1.46 m thick. This is in comparison to an active layer of 2.14 m thick over a talik of 1.86 m if thaw settlement is not considered in the simulation. Thaw settlement, the direct result of ice melting in permafrost, brings permafrost nearer to the surface and accelerates its thawing. It should be included in any numerical simulation. Copyright © 2004 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Buteau, Sylvie Fortier, Richard Delisle, Georg Allard, Michel |
spellingShingle |
Buteau, Sylvie Fortier, Richard Delisle, Georg Allard, Michel Numerical simulation of the impacts of climate warming on a permafrost mound |
author_facet |
Buteau, Sylvie Fortier, Richard Delisle, Georg Allard, Michel |
author_sort |
Buteau, Sylvie |
title |
Numerical simulation of the impacts of climate warming on a permafrost mound |
title_short |
Numerical simulation of the impacts of climate warming on a permafrost mound |
title_full |
Numerical simulation of the impacts of climate warming on a permafrost mound |
title_fullStr |
Numerical simulation of the impacts of climate warming on a permafrost mound |
title_full_unstemmed |
Numerical simulation of the impacts of climate warming on a permafrost mound |
title_sort |
numerical simulation of the impacts of climate warming on a permafrost mound |
publisher |
Wiley |
publishDate |
2004 |
url |
http://dx.doi.org/10.1002/ppp.474 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.474 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.474 |
genre |
Ice permafrost Permafrost and Periglacial Processes Talik |
genre_facet |
Ice permafrost Permafrost and Periglacial Processes Talik |
op_source |
Permafrost and Periglacial Processes volume 15, issue 1, page 41-57 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.474 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
15 |
container_issue |
1 |
container_start_page |
41 |
op_container_end_page |
57 |
_version_ |
1810449010370019328 |