Morphological and evolutionary patterns of emerging arctic coastal landscapes: the case of northwestern Nunavik (Quebec, Canada)
Northwestern Nunavik (Quebec, Canada) is characterized by specific landforms and poorly documented examples of emerging coastal landscapes. In this study, we identified the different types of coasts and examined how they were morphologically reworked and shaped during the Holocene. This coastal regi...
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crcansciencepubl:10.1139/as-2020-0002 2024-09-09T19:13:51+00:00 Morphological and evolutionary patterns of emerging arctic coastal landscapes: the case of northwestern Nunavik (Quebec, Canada) Boisson, Antoine Allard, Michel 2020 http://dx.doi.org/10.1139/as-2020-0002 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2020-0002 https://cdnsciencepub.com/doi/pdf/10.1139/as-2020-0002 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Arctic Science volume 6, issue 4, page 488-508 ISSN 2368-7460 2368-7460 journal-article 2020 crcansciencepubl https://doi.org/10.1139/as-2020-0002 2024-06-20T04:11:56Z Northwestern Nunavik (Quebec, Canada) is characterized by specific landforms and poorly documented examples of emerging coastal landscapes. In this study, we identified the different types of coasts and examined how they were morphologically reworked and shaped during the Holocene. This coastal region is currently emerging at rates of 8–9 mm/year due to glacial isostatic adjustment. The coastal zone includes a large number of glacial and glaciofluvial landforms such as De Geer moraines, eskers, and drumlinoid ridges that are continuously modified by coastal processes as they emerge. Wave erosion, shore drifting, and sedimentation transform the original landforms into transverse spits, tombolos, dunes, beaches, and narrow tidal flats. Once raised above the reach of storm surges, the coastal landscape evolves into a maze of low tundra ridges, wetlands, and lakes, which represent the end point of rapid shoreline regression. Exposure to a cold climate allows permafrost inception and aggradation in the uplifted sediments, forming features such as ice-wedge polygons and frost boils. Conceptual models of coastal evolution and ecosystem formation are proposed, from the original submarine landscapes to the emerged landscapes. Article in Journal/Newspaper Arctic Arctic Ice permafrost Tundra wedge* Nunavik Canadian Science Publishing Arctic Nunavik Canada Arctic Science 6 4 488 508 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Northwestern Nunavik (Quebec, Canada) is characterized by specific landforms and poorly documented examples of emerging coastal landscapes. In this study, we identified the different types of coasts and examined how they were morphologically reworked and shaped during the Holocene. This coastal region is currently emerging at rates of 8–9 mm/year due to glacial isostatic adjustment. The coastal zone includes a large number of glacial and glaciofluvial landforms such as De Geer moraines, eskers, and drumlinoid ridges that are continuously modified by coastal processes as they emerge. Wave erosion, shore drifting, and sedimentation transform the original landforms into transverse spits, tombolos, dunes, beaches, and narrow tidal flats. Once raised above the reach of storm surges, the coastal landscape evolves into a maze of low tundra ridges, wetlands, and lakes, which represent the end point of rapid shoreline regression. Exposure to a cold climate allows permafrost inception and aggradation in the uplifted sediments, forming features such as ice-wedge polygons and frost boils. Conceptual models of coastal evolution and ecosystem formation are proposed, from the original submarine landscapes to the emerged landscapes. |
format |
Article in Journal/Newspaper |
author |
Boisson, Antoine Allard, Michel |
spellingShingle |
Boisson, Antoine Allard, Michel Morphological and evolutionary patterns of emerging arctic coastal landscapes: the case of northwestern Nunavik (Quebec, Canada) |
author_facet |
Boisson, Antoine Allard, Michel |
author_sort |
Boisson, Antoine |
title |
Morphological and evolutionary patterns of emerging arctic coastal landscapes: the case of northwestern Nunavik (Quebec, Canada) |
title_short |
Morphological and evolutionary patterns of emerging arctic coastal landscapes: the case of northwestern Nunavik (Quebec, Canada) |
title_full |
Morphological and evolutionary patterns of emerging arctic coastal landscapes: the case of northwestern Nunavik (Quebec, Canada) |
title_fullStr |
Morphological and evolutionary patterns of emerging arctic coastal landscapes: the case of northwestern Nunavik (Quebec, Canada) |
title_full_unstemmed |
Morphological and evolutionary patterns of emerging arctic coastal landscapes: the case of northwestern Nunavik (Quebec, Canada) |
title_sort |
morphological and evolutionary patterns of emerging arctic coastal landscapes: the case of northwestern nunavik (quebec, canada) |
publisher |
Canadian Science Publishing |
publishDate |
2020 |
url |
http://dx.doi.org/10.1139/as-2020-0002 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2020-0002 https://cdnsciencepub.com/doi/pdf/10.1139/as-2020-0002 |
geographic |
Arctic Nunavik Canada |
geographic_facet |
Arctic Nunavik Canada |
genre |
Arctic Arctic Ice permafrost Tundra wedge* Nunavik |
genre_facet |
Arctic Arctic Ice permafrost Tundra wedge* Nunavik |
op_source |
Arctic Science volume 6, issue 4, page 488-508 ISSN 2368-7460 2368-7460 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/as-2020-0002 |
container_title |
Arctic Science |
container_volume |
6 |
container_issue |
4 |
container_start_page |
488 |
op_container_end_page |
508 |
_version_ |
1809754359108468736 |