Permafrost aggradation along the emerging eastern coast of Hudson Bay, Nunavik (northern Québec, Canada)
Abstract Emerging polar coasts have different geothermal regimes than those in submergence. While the scientific community is mainly concerned with rapidly eroding permafrost coastlines in sedimentary formations where relative sea level is rising, much less research has been dedicated to permafrost...
Published in: | Permafrost and Periglacial Processes |
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crwiley:10.1002/ppp.2033 2024-09-09T19:44:03+00:00 Permafrost aggradation along the emerging eastern coast of Hudson Bay, Nunavik (northern Québec, Canada) Boisson, Antoine Allard, Michel Sarrazin, Denis ArcticNet 2020 http://dx.doi.org/10.1002/ppp.2033 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.2033 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2033 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2033 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 31, issue 1, page 128-140 ISSN 1045-6740 1099-1530 journal-article 2020 crwiley https://doi.org/10.1002/ppp.2033 2024-06-18T04:12:32Z Abstract Emerging polar coasts have different geothermal regimes than those in submergence. While the scientific community is mainly concerned with rapidly eroding permafrost coastlines in sedimentary formations where relative sea level is rising, much less research has been dedicated to permafrost dynamics in emergent coastal regions where post‐glacial uplift is ongoing. The eastern Hudson Bay coast of Nunavik (northern Québec, Canada) is undergoing glacio‐isostatic uplift at a current emergence rate of about 13 mm/yr, outpacing the current global sea‐level rise (~3 mm/yr) and progressively exposing new land to climate conditions favorable for permafrost formation. To observe incipient permafrost in the shore zone over time, in 2005 we strategically installed a thermistor cable down to a depth of 23 m at a high‐tide level site. We detected the formation and the continuing deepening of permafrost near the surface. Freezing of the ground was also favored by a succession of several cold years in Nunavik since 2010. The near 0°C temperature profile at greater depths also reveals the cooling influence of deep Hudson Bay waters on the shore zone ground temperature regime and the probable presence of subsea permafrost offshore of the measurement site. Article in Journal/Newspaper Hudson Bay permafrost Permafrost and Periglacial Processes Nunavik Wiley Online Library Hudson Bay Nunavik Canada Hudson Permafrost and Periglacial Processes 31 1 128 140 |
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Wiley Online Library |
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English |
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Abstract Emerging polar coasts have different geothermal regimes than those in submergence. While the scientific community is mainly concerned with rapidly eroding permafrost coastlines in sedimentary formations where relative sea level is rising, much less research has been dedicated to permafrost dynamics in emergent coastal regions where post‐glacial uplift is ongoing. The eastern Hudson Bay coast of Nunavik (northern Québec, Canada) is undergoing glacio‐isostatic uplift at a current emergence rate of about 13 mm/yr, outpacing the current global sea‐level rise (~3 mm/yr) and progressively exposing new land to climate conditions favorable for permafrost formation. To observe incipient permafrost in the shore zone over time, in 2005 we strategically installed a thermistor cable down to a depth of 23 m at a high‐tide level site. We detected the formation and the continuing deepening of permafrost near the surface. Freezing of the ground was also favored by a succession of several cold years in Nunavik since 2010. The near 0°C temperature profile at greater depths also reveals the cooling influence of deep Hudson Bay waters on the shore zone ground temperature regime and the probable presence of subsea permafrost offshore of the measurement site. |
author2 |
ArcticNet |
format |
Article in Journal/Newspaper |
author |
Boisson, Antoine Allard, Michel Sarrazin, Denis |
spellingShingle |
Boisson, Antoine Allard, Michel Sarrazin, Denis Permafrost aggradation along the emerging eastern coast of Hudson Bay, Nunavik (northern Québec, Canada) |
author_facet |
Boisson, Antoine Allard, Michel Sarrazin, Denis |
author_sort |
Boisson, Antoine |
title |
Permafrost aggradation along the emerging eastern coast of Hudson Bay, Nunavik (northern Québec, Canada) |
title_short |
Permafrost aggradation along the emerging eastern coast of Hudson Bay, Nunavik (northern Québec, Canada) |
title_full |
Permafrost aggradation along the emerging eastern coast of Hudson Bay, Nunavik (northern Québec, Canada) |
title_fullStr |
Permafrost aggradation along the emerging eastern coast of Hudson Bay, Nunavik (northern Québec, Canada) |
title_full_unstemmed |
Permafrost aggradation along the emerging eastern coast of Hudson Bay, Nunavik (northern Québec, Canada) |
title_sort |
permafrost aggradation along the emerging eastern coast of hudson bay, nunavik (northern québec, canada) |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/ppp.2033 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fppp.2033 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2033 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2033 |
geographic |
Hudson Bay Nunavik Canada Hudson |
geographic_facet |
Hudson Bay Nunavik Canada Hudson |
genre |
Hudson Bay permafrost Permafrost and Periglacial Processes Nunavik |
genre_facet |
Hudson Bay permafrost Permafrost and Periglacial Processes Nunavik |
op_source |
Permafrost and Periglacial Processes volume 31, issue 1, page 128-140 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.2033 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
31 |
container_issue |
1 |
container_start_page |
128 |
op_container_end_page |
140 |
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1809913772975849472 |