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
2016
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Online Access: | https://doi.org/10.3402/polar.v35.30313 https://doaj.org/article/e3810597321741349cf6c185b27403b5 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:e3810597321741349cf6c185b27403b5 2023-05-15T14:54:46+02:00 Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic Jaroslav Obu Hugues Lantuit Michael Fritz Wayne H. Pollard Torsten Sachs Frank Günther 2016-09-01 https://doi.org/10.3402/polar.v35.30313 https://doaj.org/article/e3810597321741349cf6c185b27403b5 en eng Norwegian Polar Institute 1751-8369 doi:10.3402/polar.v35.30313 https://doaj.org/article/e3810597321741349cf6c185b27403b5 undefined Polar Research, Vol 35, Iss 0, Pp 1-13 (2016) Coastal erosion LiDAR carbon fluxes mass wasting landslides digital elevation model geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2016 fttriple https://doi.org/10.3402/polar.v35.30313 2023-01-22T19:28:50Z 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. Article in Journal/Newspaper Arctic Beaufort Sea Herschel Island Ice permafrost Polar Research Unknown Arctic Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Polar Research 35 1 30313 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Coastal erosion LiDAR carbon fluxes mass wasting landslides digital elevation model geo envir |
spellingShingle |
Coastal erosion LiDAR carbon fluxes mass wasting landslides digital elevation model geo envir Jaroslav Obu Hugues Lantuit Michael Fritz Wayne H. Pollard Torsten Sachs Frank Günther 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 geo envir |
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. |
format |
Article in Journal/Newspaper |
author |
Jaroslav Obu Hugues Lantuit Michael Fritz Wayne H. Pollard Torsten Sachs Frank Günther |
author_facet |
Jaroslav Obu Hugues Lantuit Michael Fritz Wayne H. Pollard Torsten Sachs Frank Günther |
author_sort |
Jaroslav Obu |
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://doi.org/10.3402/polar.v35.30313 https://doaj.org/article/e3810597321741349cf6c185b27403b5 |
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, Iss 0, Pp 1-13 (2016) |
op_relation |
1751-8369 doi:10.3402/polar.v35.30313 https://doaj.org/article/e3810597321741349cf6c185b27403b5 |
op_rights |
undefined |
op_doi |
https://doi.org/10.3402/polar.v35.30313 |
container_title |
Polar Research |
container_volume |
35 |
container_issue |
1 |
container_start_page |
30313 |
_version_ |
1766326517207400448 |