Rapid coastal erosion of ice-bonded deposits on Pelly Island, southeastern Beaufort Sea, Inuvialuit Settlement Region, western Canadian Arctic
This paper quantifies rates of shoreline change and investigates the influence of surficial geology on shoreline dynamics between 1950 and 2018 on Pelly Island, located 10 km off the Mackenzie Delta. Long-term changes in shoreline position were calculated using imagery analysis and Analysing Moving...
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crcansciencepubl:10.1139/cjes-2021-0118 2023-12-17T10:26:22+01:00 Rapid coastal erosion of ice-bonded deposits on Pelly Island, southeastern Beaufort Sea, Inuvialuit Settlement Region, western Canadian Arctic Malenfant, François Whalen, D. Fraser, P. van Proosdij, D. 2022 http://dx.doi.org/10.1139/cjes-2021-0118 https://cdnsciencepub.com/doi/full-xml/10.1139/cjes-2021-0118 https://cdnsciencepub.com/doi/pdf/10.1139/cjes-2021-0118 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 59, issue 11, page 961-972 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2022 crcansciencepubl https://doi.org/10.1139/cjes-2021-0118 2023-11-19T13:38:40Z This paper quantifies rates of shoreline change and investigates the influence of surficial geology on shoreline dynamics between 1950 and 2018 on Pelly Island, located 10 km off the Mackenzie Delta. Long-term changes in shoreline position were calculated using imagery analysis and Analysing Moving Boundaries Using R (AMBUR). The influence of shoreline exposure to predominant storm direction and influence of surficial geology were examined for northwestern and southeastern zones. The average annual linear regression rate (LRR) rate during the 1950–2018 observation period was −3.8 m·a −1 . The end point rate (EPR) was calculated for seven observation periods: 1950–1972, 1972–1985, 1985–2000, 2000–2018, 2000–2013, 2013–2018, and 1950–2018. A mean EPR of −5.5 ± 0.7 m·a −1 was calculated for the 2000–2018 period, and a maximum retreat rate of 46.7 ± 2.1 m·a −1 was recorded during the 2013–2018 observation period. By comparing the rate of change for sections of historical shorelines with differing surficial geology and exposure to storms, it was possible to draw conclusions on why Pelly Island continues to have the highest retreat rates in the Mackenzie–Beaufort region. Greater retreat rates were observed in lacustrine deposits (5.3 m·a −1 ) compared with moraine deposits (2.7 m·a −1 ). In addition, shoreline exposure to the predominant storm direction from the northwest was found to be a major influence on rates of shoreline change in all observation periods. Article in Journal/Newspaper Arctic Beaufort Sea Inuvialuit Mackenzie Delta Canadian Science Publishing (via Crossref) Arctic Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Pelly Island ENVELOPE(-135.506,-135.506,69.600,69.600) Canadian Journal of Earth Sciences |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Malenfant, François Whalen, D. Fraser, P. van Proosdij, D. Rapid coastal erosion of ice-bonded deposits on Pelly Island, southeastern Beaufort Sea, Inuvialuit Settlement Region, western Canadian Arctic |
topic_facet |
General Earth and Planetary Sciences |
description |
This paper quantifies rates of shoreline change and investigates the influence of surficial geology on shoreline dynamics between 1950 and 2018 on Pelly Island, located 10 km off the Mackenzie Delta. Long-term changes in shoreline position were calculated using imagery analysis and Analysing Moving Boundaries Using R (AMBUR). The influence of shoreline exposure to predominant storm direction and influence of surficial geology were examined for northwestern and southeastern zones. The average annual linear regression rate (LRR) rate during the 1950–2018 observation period was −3.8 m·a −1 . The end point rate (EPR) was calculated for seven observation periods: 1950–1972, 1972–1985, 1985–2000, 2000–2018, 2000–2013, 2013–2018, and 1950–2018. A mean EPR of −5.5 ± 0.7 m·a −1 was calculated for the 2000–2018 period, and a maximum retreat rate of 46.7 ± 2.1 m·a −1 was recorded during the 2013–2018 observation period. By comparing the rate of change for sections of historical shorelines with differing surficial geology and exposure to storms, it was possible to draw conclusions on why Pelly Island continues to have the highest retreat rates in the Mackenzie–Beaufort region. Greater retreat rates were observed in lacustrine deposits (5.3 m·a −1 ) compared with moraine deposits (2.7 m·a −1 ). In addition, shoreline exposure to the predominant storm direction from the northwest was found to be a major influence on rates of shoreline change in all observation periods. |
format |
Article in Journal/Newspaper |
author |
Malenfant, François Whalen, D. Fraser, P. van Proosdij, D. |
author_facet |
Malenfant, François Whalen, D. Fraser, P. van Proosdij, D. |
author_sort |
Malenfant, François |
title |
Rapid coastal erosion of ice-bonded deposits on Pelly Island, southeastern Beaufort Sea, Inuvialuit Settlement Region, western Canadian Arctic |
title_short |
Rapid coastal erosion of ice-bonded deposits on Pelly Island, southeastern Beaufort Sea, Inuvialuit Settlement Region, western Canadian Arctic |
title_full |
Rapid coastal erosion of ice-bonded deposits on Pelly Island, southeastern Beaufort Sea, Inuvialuit Settlement Region, western Canadian Arctic |
title_fullStr |
Rapid coastal erosion of ice-bonded deposits on Pelly Island, southeastern Beaufort Sea, Inuvialuit Settlement Region, western Canadian Arctic |
title_full_unstemmed |
Rapid coastal erosion of ice-bonded deposits on Pelly Island, southeastern Beaufort Sea, Inuvialuit Settlement Region, western Canadian Arctic |
title_sort |
rapid coastal erosion of ice-bonded deposits on pelly island, southeastern beaufort sea, inuvialuit settlement region, western canadian arctic |
publisher |
Canadian Science Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1139/cjes-2021-0118 https://cdnsciencepub.com/doi/full-xml/10.1139/cjes-2021-0118 https://cdnsciencepub.com/doi/pdf/10.1139/cjes-2021-0118 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(-135.506,-135.506,69.600,69.600) |
geographic |
Arctic Mackenzie Delta Pelly Island |
geographic_facet |
Arctic Mackenzie Delta Pelly Island |
genre |
Arctic Beaufort Sea Inuvialuit Mackenzie Delta |
genre_facet |
Arctic Beaufort Sea Inuvialuit Mackenzie Delta |
op_source |
Canadian Journal of Earth Sciences volume 59, issue 11, page 961-972 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjes-2021-0118 |
container_title |
Canadian Journal of Earth Sciences |
_version_ |
1785578087396671488 |