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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ftubpotsdam:oai:kobv.de-opus4-uni-potsdam:45736 2023-12-03T10:16:59+01:00 Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic Obu, Jaroslav Lantuit, Hugues (Prof. Dr.) Fritz, Michael (Dr.) Pollard, Wayne H. Sachs, Torsten Guenther, Frank 2016 https://publishup.uni-potsdam.de/frontdoor/index/index/docId/45736 https://doi.org/10.3402/polar.v35.30313 eng eng https://publishup.uni-potsdam.de/frontdoor/index/index/docId/45736 https://doi.org/10.3402/polar.v35.30313 info:eu-repo/semantics/closedAccess Institut für Geowissenschaften article doc-type:article 2016 ftubpotsdam https://doi.org/10.3402/polar.v35.30313 2023-11-05T23:35:04Z 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 0.68m 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 m(3) 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 University of Potsdam: publish.UP Arctic Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Polar Research 35 1 30313 |
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University of Potsdam: publish.UP |
op_collection_id |
ftubpotsdam |
language |
English |
topic |
Institut für Geowissenschaften |
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Institut für Geowissenschaften Obu, Jaroslav Lantuit, Hugues (Prof. Dr.) Fritz, Michael (Dr.) Pollard, Wayne H. Sachs, Torsten Guenther, Frank Relation between planimetric and volumetric measurements of permafrost coast erosion: a case study from Herschel Island, western Canadian Arctic |
topic_facet |
Institut für Geowissenschaften |
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 0.68m 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 m(3) m(-1) with resulting fluxes of 590 kg C m(-1) and 104 kg N m(-1). |
format |
Article in Journal/Newspaper |
author |
Obu, Jaroslav Lantuit, Hugues (Prof. Dr.) Fritz, Michael (Dr.) Pollard, Wayne H. Sachs, Torsten Guenther, Frank |
author_facet |
Obu, Jaroslav Lantuit, Hugues (Prof. Dr.) Fritz, Michael (Dr.) Pollard, Wayne H. Sachs, Torsten Guenther, 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 |
publishDate |
2016 |
url |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/45736 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 |
genre_facet |
Arctic Beaufort Sea Herschel Island Ice permafrost |
op_relation |
https://publishup.uni-potsdam.de/frontdoor/index/index/docId/45736 https://doi.org/10.3402/polar.v35.30313 |
op_rights |
info:eu-repo/semantics/closedAccess |
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_ |
1784263935907594240 |