Terrain Controls and Landscape‐Scale Susceptibility Modelling of Active‐Layer Detachments, Sabine Peninsula, Melville Island, Nunavut
Modelling the susceptibility of permafrost slopes to disturbance can identify areas at risk to future disturbance and result in safer infrastructure and resource development in the Arctic. In this study, we use terrain attributes derived from a digital elevation model, an inventory of permafrost slo...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.1900 |
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ftrepec:oai:RePEc:wly:perpro:v:28:y:2017:i:1:p:79-91 2023-05-15T14:57:18+02:00 Terrain Controls and Landscape‐Scale Susceptibility Modelling of Active‐Layer Detachments, Sabine Peninsula, Melville Island, Nunavut Ashley C. A. Rudy Scott F. Lamoureux Paul Treitz Karin Van Ewijk Philip P. Bonnaventure Paul Budkewitsch https://doi.org/10.1002/ppp.1900 unknown https://doi.org/10.1002/ppp.1900 article ftrepec https://doi.org/10.1002/ppp.1900 2020-12-04T13:31:25Z Modelling the susceptibility of permafrost slopes to disturbance can identify areas at risk to future disturbance and result in safer infrastructure and resource development in the Arctic. In this study, we use terrain attributes derived from a digital elevation model, an inventory of permafrost slope disturbances known as active‐layer detachments (ALDs) and generalised additive modelling to produce a map of permafrost slope disturbance susceptibility for an area on northern Melville Island, in the Canadian High Arctic. By examining terrain variables and their relative importance, we identified factors important for initiating slope disturbance. The model was calibrated and validated using 70 and 30 per cent of a data‐set of 760 mapped ALDs, including disturbed and randomised undisturbed samples. The generalised additive model calibrated and validated very well, with areas under the receiver operating characteristic curve of 0.89 and 0.81, respectively, demonstrating its effectiveness at predicting disturbed and undisturbed samples. ALDs were most likely to occur below the marine limit on slope angles between 3 and 10° and in areas with low values of potential incoming solar radiation (north‐facing slopes). Copyright © 2016 John Wiley & Sons, Ltd. Article in Journal/Newspaper Arctic Nunavut permafrost Melville Island RePEc (Research Papers in Economics) Arctic Nunavut Sabine Peninsula ENVELOPE(-109.505,-109.505,76.335,76.335) Permafrost and Periglacial Processes 28 1 79 91 |
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Open Polar |
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RePEc (Research Papers in Economics) |
op_collection_id |
ftrepec |
language |
unknown |
description |
Modelling the susceptibility of permafrost slopes to disturbance can identify areas at risk to future disturbance and result in safer infrastructure and resource development in the Arctic. In this study, we use terrain attributes derived from a digital elevation model, an inventory of permafrost slope disturbances known as active‐layer detachments (ALDs) and generalised additive modelling to produce a map of permafrost slope disturbance susceptibility for an area on northern Melville Island, in the Canadian High Arctic. By examining terrain variables and their relative importance, we identified factors important for initiating slope disturbance. The model was calibrated and validated using 70 and 30 per cent of a data‐set of 760 mapped ALDs, including disturbed and randomised undisturbed samples. The generalised additive model calibrated and validated very well, with areas under the receiver operating characteristic curve of 0.89 and 0.81, respectively, demonstrating its effectiveness at predicting disturbed and undisturbed samples. ALDs were most likely to occur below the marine limit on slope angles between 3 and 10° and in areas with low values of potential incoming solar radiation (north‐facing slopes). Copyright © 2016 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Ashley C. A. Rudy Scott F. Lamoureux Paul Treitz Karin Van Ewijk Philip P. Bonnaventure Paul Budkewitsch |
spellingShingle |
Ashley C. A. Rudy Scott F. Lamoureux Paul Treitz Karin Van Ewijk Philip P. Bonnaventure Paul Budkewitsch Terrain Controls and Landscape‐Scale Susceptibility Modelling of Active‐Layer Detachments, Sabine Peninsula, Melville Island, Nunavut |
author_facet |
Ashley C. A. Rudy Scott F. Lamoureux Paul Treitz Karin Van Ewijk Philip P. Bonnaventure Paul Budkewitsch |
author_sort |
Ashley C. A. Rudy |
title |
Terrain Controls and Landscape‐Scale Susceptibility Modelling of Active‐Layer Detachments, Sabine Peninsula, Melville Island, Nunavut |
title_short |
Terrain Controls and Landscape‐Scale Susceptibility Modelling of Active‐Layer Detachments, Sabine Peninsula, Melville Island, Nunavut |
title_full |
Terrain Controls and Landscape‐Scale Susceptibility Modelling of Active‐Layer Detachments, Sabine Peninsula, Melville Island, Nunavut |
title_fullStr |
Terrain Controls and Landscape‐Scale Susceptibility Modelling of Active‐Layer Detachments, Sabine Peninsula, Melville Island, Nunavut |
title_full_unstemmed |
Terrain Controls and Landscape‐Scale Susceptibility Modelling of Active‐Layer Detachments, Sabine Peninsula, Melville Island, Nunavut |
title_sort |
terrain controls and landscape‐scale susceptibility modelling of active‐layer detachments, sabine peninsula, melville island, nunavut |
url |
https://doi.org/10.1002/ppp.1900 |
long_lat |
ENVELOPE(-109.505,-109.505,76.335,76.335) |
geographic |
Arctic Nunavut Sabine Peninsula |
geographic_facet |
Arctic Nunavut Sabine Peninsula |
genre |
Arctic Nunavut permafrost Melville Island |
genre_facet |
Arctic Nunavut permafrost Melville Island |
op_relation |
https://doi.org/10.1002/ppp.1900 |
op_doi |
https://doi.org/10.1002/ppp.1900 |
container_title |
Permafrost and Periglacial Processes |
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28 |
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1 |
container_start_page |
79 |
op_container_end_page |
91 |
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1766329375028936704 |