Numerical simulation of the impacts of climate warming on a permafrost mound
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 scenario...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.474 |
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ftrepec:oai:RePEc:wly:perpro:v:15:y:2004:i:1:p:41-57 2023-05-15T16:36:51+02:00 Numerical simulation of the impacts of climate warming on a permafrost mound Sylvie Buteau Richard Fortier Georg Delisle Michel Allard https://doi.org/10.1002/ppp.474 unknown https://doi.org/10.1002/ppp.474 article ftrepec https://doi.org/10.1002/ppp.474 2020-12-04T13:31:25Z 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 Talik RePEc (Research Papers in Economics) Talik ENVELOPE(146.601,146.601,59.667,59.667) Permafrost and Periglacial Processes 15 1 41 57 |
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Open Polar |
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RePEc (Research Papers in Economics) |
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description |
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 |
Sylvie Buteau Richard Fortier Georg Delisle Michel Allard |
spellingShingle |
Sylvie Buteau Richard Fortier Georg Delisle Michel Allard Numerical simulation of the impacts of climate warming on a permafrost mound |
author_facet |
Sylvie Buteau Richard Fortier Georg Delisle Michel Allard |
author_sort |
Sylvie Buteau |
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 |
url |
https://doi.org/10.1002/ppp.474 |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Talik |
geographic_facet |
Talik |
genre |
Ice permafrost Talik |
genre_facet |
Ice permafrost Talik |
op_relation |
https://doi.org/10.1002/ppp.474 |
op_doi |
https://doi.org/10.1002/ppp.474 |
container_title |
Permafrost and Periglacial Processes |
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15 |
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1 |
container_start_page |
41 |
op_container_end_page |
57 |
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1766027167352750080 |