Remote sensing analysis of recent coastal change and its controlling factors in Darnley Bay (Amundsen Gulf, Canada)
As the Arctic warms, permafrost coasts are experiencing higher rates of erosion, threatening coastal communities and infrastructure, and altering sediment and nutrient budgets. However, some areas are still neglected by research. The mouth of the Gulf of Amundsen is home to Darnley Bay, while the co...
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ftunivalgarve:oai:sapientia.ualg.pt:10400.1/19453 2023-06-11T04:03:32+02:00 Remote sensing analysis of recent coastal change and its controlling factors in Darnley Bay (Amundsen Gulf, Canada) Tanguy, Rodrigue Raymond Phoebus Delgado, Prates, Gonçalo Nuno 2021-12-09 http://hdl.handle.net/10400.1/19453 eng eng http://hdl.handle.net/10400.1/19453 202910970 openAccess http://creativecommons.org/licenses/by/4.0/ Coastal dynamics Permafrost Darnley Bay Paulatuk Remote sensing Domínio/Área Científica::Ciências Naturais::Outras Ciências Naturais masterThesis 2021 ftunivalgarve 2023-04-19T00:05:47Z As the Arctic warms, permafrost coasts are experiencing higher rates of erosion, threatening coastal communities and infrastructure, and altering sediment and nutrient budgets. However, some areas are still neglected by research. The mouth of the Gulf of Amundsen is home to Darnley Bay, while the coast of the ecologically important Cape Parry to Paulatuk area included in the Anguniaqvia Niqiqyuam Marine Protected Area has been still little studied. This area is home to Arctic char, cod, beluga whales, ringed and bearded seals, polar bears and sea birds. It is also an important area for the Inuvialuit who have an intrinsic attachment to their land ensuring the survival of their culture and food source. Settled in Paulatuk, Inuvialuit are witnessing the warming of their territory and the degradation of the permafrost. This study aims to establish the geomorphological characterization of the Paulatuk coast and peninsula and to quantify coastal changes over 55 years, using a new very high resolution survey based on CNES Pleiades imagery from August 2020, as well as historical aerial imagery from 1965. Key areas, such as Paulatuk, were also surveyed using unmanned aerial vehicles in 2019. The results indicate a small average erosion rate of -0.1 m/year of the surveyed coastlines from 1965 to 2020. At a regional scale, there is a disparity in erosion rates depending on the type of substrate. Erosion rates are significantly different in function of the type of coastal material. Unconsolidated areas show erosion rates of up to -3 m/year while consolidated express stability. These values are relatively low compared to other sites on the Beaufort Sea Coast (e.g. Qikiqtaryuk/Herschel Island, Yukon coast, Mackenzie delta), which are more susceptible to erosion due to soil composition, ground ice content, cliff height and exposure to swells. The very high resolution geomorphological mapping provide important spatial information to the coastal community. Paulatuk is showing signs of degrading permafrost landscape with ... Master Thesis Amundsen Gulf Arctic Beaufort Sea Beluga Beluga* Cape Parry Darnley Bay Herschel Herschel Island Ice Inuvialuit Mackenzie Delta Paulatuk permafrost Yukon Universidade do Algarve: Sapienta Arctic Yukon Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Parry ENVELOPE(-62.417,-62.417,-64.283,-64.283) Darnley ENVELOPE(69.717,69.717,-67.717,-67.717) Pleiades ENVELOPE(165.533,165.533,-72.700,-72.700) Darnley Bay ENVELOPE(-123.671,-123.671,69.584,69.584) Paulatuk ENVELOPE(-123.985,-123.985,69.325,69.325) Cape Parry ENVELOPE(-124.672,-124.672,70.151,70.151) |
institution |
Open Polar |
collection |
Universidade do Algarve: Sapienta |
op_collection_id |
ftunivalgarve |
language |
English |
topic |
Coastal dynamics Permafrost Darnley Bay Paulatuk Remote sensing Domínio/Área Científica::Ciências Naturais::Outras Ciências Naturais |
spellingShingle |
Coastal dynamics Permafrost Darnley Bay Paulatuk Remote sensing Domínio/Área Científica::Ciências Naturais::Outras Ciências Naturais Tanguy, Rodrigue Raymond Phoebus Remote sensing analysis of recent coastal change and its controlling factors in Darnley Bay (Amundsen Gulf, Canada) |
topic_facet |
Coastal dynamics Permafrost Darnley Bay Paulatuk Remote sensing Domínio/Área Científica::Ciências Naturais::Outras Ciências Naturais |
description |
As the Arctic warms, permafrost coasts are experiencing higher rates of erosion, threatening coastal communities and infrastructure, and altering sediment and nutrient budgets. However, some areas are still neglected by research. The mouth of the Gulf of Amundsen is home to Darnley Bay, while the coast of the ecologically important Cape Parry to Paulatuk area included in the Anguniaqvia Niqiqyuam Marine Protected Area has been still little studied. This area is home to Arctic char, cod, beluga whales, ringed and bearded seals, polar bears and sea birds. It is also an important area for the Inuvialuit who have an intrinsic attachment to their land ensuring the survival of their culture and food source. Settled in Paulatuk, Inuvialuit are witnessing the warming of their territory and the degradation of the permafrost. This study aims to establish the geomorphological characterization of the Paulatuk coast and peninsula and to quantify coastal changes over 55 years, using a new very high resolution survey based on CNES Pleiades imagery from August 2020, as well as historical aerial imagery from 1965. Key areas, such as Paulatuk, were also surveyed using unmanned aerial vehicles in 2019. The results indicate a small average erosion rate of -0.1 m/year of the surveyed coastlines from 1965 to 2020. At a regional scale, there is a disparity in erosion rates depending on the type of substrate. Erosion rates are significantly different in function of the type of coastal material. Unconsolidated areas show erosion rates of up to -3 m/year while consolidated express stability. These values are relatively low compared to other sites on the Beaufort Sea Coast (e.g. Qikiqtaryuk/Herschel Island, Yukon coast, Mackenzie delta), which are more susceptible to erosion due to soil composition, ground ice content, cliff height and exposure to swells. The very high resolution geomorphological mapping provide important spatial information to the coastal community. Paulatuk is showing signs of degrading permafrost landscape with ... |
author2 |
Delgado, Prates, Gonçalo Nuno |
format |
Master Thesis |
author |
Tanguy, Rodrigue Raymond Phoebus |
author_facet |
Tanguy, Rodrigue Raymond Phoebus |
author_sort |
Tanguy, Rodrigue Raymond Phoebus |
title |
Remote sensing analysis of recent coastal change and its controlling factors in Darnley Bay (Amundsen Gulf, Canada) |
title_short |
Remote sensing analysis of recent coastal change and its controlling factors in Darnley Bay (Amundsen Gulf, Canada) |
title_full |
Remote sensing analysis of recent coastal change and its controlling factors in Darnley Bay (Amundsen Gulf, Canada) |
title_fullStr |
Remote sensing analysis of recent coastal change and its controlling factors in Darnley Bay (Amundsen Gulf, Canada) |
title_full_unstemmed |
Remote sensing analysis of recent coastal change and its controlling factors in Darnley Bay (Amundsen Gulf, Canada) |
title_sort |
remote sensing analysis of recent coastal change and its controlling factors in darnley bay (amundsen gulf, canada) |
publishDate |
2021 |
url |
http://hdl.handle.net/10400.1/19453 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(-139.089,-139.089,69.583,69.583) ENVELOPE(-62.417,-62.417,-64.283,-64.283) ENVELOPE(69.717,69.717,-67.717,-67.717) ENVELOPE(165.533,165.533,-72.700,-72.700) ENVELOPE(-123.671,-123.671,69.584,69.584) ENVELOPE(-123.985,-123.985,69.325,69.325) ENVELOPE(-124.672,-124.672,70.151,70.151) |
geographic |
Arctic Yukon Canada Mackenzie Delta Herschel Island Parry Darnley Pleiades Darnley Bay Paulatuk Cape Parry |
geographic_facet |
Arctic Yukon Canada Mackenzie Delta Herschel Island Parry Darnley Pleiades Darnley Bay Paulatuk Cape Parry |
genre |
Amundsen Gulf Arctic Beaufort Sea Beluga Beluga* Cape Parry Darnley Bay Herschel Herschel Island Ice Inuvialuit Mackenzie Delta Paulatuk permafrost Yukon |
genre_facet |
Amundsen Gulf Arctic Beaufort Sea Beluga Beluga* Cape Parry Darnley Bay Herschel Herschel Island Ice Inuvialuit Mackenzie Delta Paulatuk permafrost Yukon |
op_relation |
http://hdl.handle.net/10400.1/19453 202910970 |
op_rights |
openAccess http://creativecommons.org/licenses/by/4.0/ |
_version_ |
1768380216098422784 |