Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic
Ice-rich permafrost coasts often undergo rapid erosion, which results in land loss and release of considerable amounts of sediment, organic carbon and nutrients, impacting the near-shore ecosystems. Because of the lack of volumetric erosion data, Arctic coastal erosion studies typically report on pl...
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Norwegian Polar Institute
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ftjpolarres:oai:journals.openacademia.net:article/3258 2024-06-23T07:50:01+00:00 Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic Obu, Jaroslav Lantuit, Hugues Fritz, Michael Pollard, Wayne H. Sachs, Torsten Günther, Frank 2016-09-23 application/pdf text/html application/epub+zip application/xml https://polarresearch.net/index.php/polar/article/view/3258 https://doi.org/10.3402/polar.v35.30313 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/3258/8612 https://polarresearch.net/index.php/polar/article/view/3258/8613 https://polarresearch.net/index.php/polar/article/view/3258/8614 https://polarresearch.net/index.php/polar/article/view/3258/8615 https://polarresearch.net/index.php/polar/article/view/3258/8620 https://polarresearch.net/index.php/polar/article/view/3258 doi:10.3402/polar.v35.30313 Polar Research; Vol 35 (2016) 1751-8369 Coastal erosion LiDAR carbon fluxes mass wasting landslides digital elevation model info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2016 ftjpolarres https://doi.org/10.3402/polar.v35.30313 2024-06-13T23:33:00Z Ice-rich permafrost coasts often undergo rapid erosion, which results in land loss and release of considerable amounts of sediment, organic carbon and nutrients, impacting the near-shore ecosystems. Because of the lack of volumetric erosion data, Arctic coastal erosion studies typically report on planimetric erosion. Our aim is to explore the relationship between planimetric and volumetric coastal erosion measurements and to update the coastal erosion rates on Herschel Island in the Canadian Arctic. We used high-resolution digital elevation models to compute sediment release and compare volumetric data to planimetric estimations of coastline movements digitized from satellite imagery. Our results show that volumetric erosion is locally less variable and likely corresponds better with environmental forcing than planimetric erosion. Average sediment release volumes are in the same range as sediment release volumes calculated from coastline movements combined with cliff height. However, the differences between these estimates are significant for small coastal sections. We attribute the differences between planimetric and volumetric coastal erosion measurements to mass wasting, which is abundant along the coasts of Herschel Island. The average recorded coastline retreat on Herschel Island was 0.68 m a−1 for the period 2000–2011. Erosion rates increased by more than 50% in comparison with the period 1970–2000, which is in accordance with a recently observed increase along the Alaskan Beaufort Sea. The estimated annual sediment release was 28.2 m3 m−1 with resulting fluxes of 590 kg C m−1 and 104 kg N m−1.Keywords: Coastal erosion; LiDAR; carbon fluxes; mass wasting; landslides; digital elevation model.(Published: 23 September 2016)To access the supplementary material for this article, please see Supplementary files under Article Tools online.Citation: Polar Research 2016, 35, 30313, http://dx.doi.org/10.3402/polar.v35.30313 Article in Journal/Newspaper Arctic Beaufort Sea Herschel Island Ice permafrost Polar Research Polar Research Arctic Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Polar Research 35 1 30313 |
institution |
Open Polar |
collection |
Polar Research |
op_collection_id |
ftjpolarres |
language |
English |
topic |
Coastal erosion LiDAR carbon fluxes mass wasting landslides digital elevation model |
spellingShingle |
Coastal erosion LiDAR carbon fluxes mass wasting landslides digital elevation model Obu, Jaroslav Lantuit, Hugues Fritz, Michael Pollard, Wayne H. Sachs, Torsten Günther, Frank Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic |
topic_facet |
Coastal erosion LiDAR carbon fluxes mass wasting landslides digital elevation model |
description |
Ice-rich permafrost coasts often undergo rapid erosion, which results in land loss and release of considerable amounts of sediment, organic carbon and nutrients, impacting the near-shore ecosystems. Because of the lack of volumetric erosion data, Arctic coastal erosion studies typically report on planimetric erosion. Our aim is to explore the relationship between planimetric and volumetric coastal erosion measurements and to update the coastal erosion rates on Herschel Island in the Canadian Arctic. We used high-resolution digital elevation models to compute sediment release and compare volumetric data to planimetric estimations of coastline movements digitized from satellite imagery. Our results show that volumetric erosion is locally less variable and likely corresponds better with environmental forcing than planimetric erosion. Average sediment release volumes are in the same range as sediment release volumes calculated from coastline movements combined with cliff height. However, the differences between these estimates are significant for small coastal sections. We attribute the differences between planimetric and volumetric coastal erosion measurements to mass wasting, which is abundant along the coasts of Herschel Island. The average recorded coastline retreat on Herschel Island was 0.68 m a−1 for the period 2000–2011. Erosion rates increased by more than 50% in comparison with the period 1970–2000, which is in accordance with a recently observed increase along the Alaskan Beaufort Sea. The estimated annual sediment release was 28.2 m3 m−1 with resulting fluxes of 590 kg C m−1 and 104 kg N m−1.Keywords: Coastal erosion; LiDAR; carbon fluxes; mass wasting; landslides; digital elevation model.(Published: 23 September 2016)To access the supplementary material for this article, please see Supplementary files under Article Tools online.Citation: Polar Research 2016, 35, 30313, http://dx.doi.org/10.3402/polar.v35.30313 |
format |
Article in Journal/Newspaper |
author |
Obu, Jaroslav Lantuit, Hugues Fritz, Michael Pollard, Wayne H. Sachs, Torsten Günther, Frank |
author_facet |
Obu, Jaroslav Lantuit, Hugues Fritz, Michael Pollard, Wayne H. Sachs, Torsten Günther, Frank |
author_sort |
Obu, Jaroslav |
title |
Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic |
title_short |
Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic |
title_full |
Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic |
title_fullStr |
Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic |
title_full_unstemmed |
Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic |
title_sort |
relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from herschel island, western canadian arctic |
publisher |
Norwegian Polar Institute |
publishDate |
2016 |
url |
https://polarresearch.net/index.php/polar/article/view/3258 https://doi.org/10.3402/polar.v35.30313 |
long_lat |
ENVELOPE(-139.089,-139.089,69.583,69.583) |
geographic |
Arctic Herschel Island |
geographic_facet |
Arctic Herschel Island |
genre |
Arctic Beaufort Sea Herschel Island Ice permafrost Polar Research |
genre_facet |
Arctic Beaufort Sea Herschel Island Ice permafrost Polar Research |
op_source |
Polar Research; Vol 35 (2016) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/3258/8612 https://polarresearch.net/index.php/polar/article/view/3258/8613 https://polarresearch.net/index.php/polar/article/view/3258/8614 https://polarresearch.net/index.php/polar/article/view/3258/8615 https://polarresearch.net/index.php/polar/article/view/3258/8620 https://polarresearch.net/index.php/polar/article/view/3258 doi:10.3402/polar.v35.30313 |
op_doi |
https://doi.org/10.3402/polar.v35.30313 |
container_title |
Polar Research |
container_volume |
35 |
container_issue |
1 |
container_start_page |
30313 |
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1802640770200502272 |