Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling
Warming of the Arctic in recent years has led to changes in the active layer and uppermost permafrost. In particular, thick active layer formation results in more frequent thaw of the ice-rich transient layer. This addition of moisture, as well as infiltration from late season precipitation, results...
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Copernicus Publications
2017
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00009788 2023-05-15T14:59:12+02:00 Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling Holloway, Jean E. Rudy, Ashley C. A. Lamoureux, Scott F. Treitz, Paul M. 2017-06 electronic https://doi.org/10.5194/tc-11-1403-2017 https://noa.gwlb.de/receive/cop_mods_00009788 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00009745/tc-11-1403-2017.pdf https://tc.copernicus.org/articles/11/1403/2017/tc-11-1403-2017.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-11-1403-2017 https://noa.gwlb.de/receive/cop_mods_00009788 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00009745/tc-11-1403-2017.pdf https://tc.copernicus.org/articles/11/1403/2017/tc-11-1403-2017.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2017 ftnonlinearchiv https://doi.org/10.5194/tc-11-1403-2017 2022-02-08T22:57:22Z Warming of the Arctic in recent years has led to changes in the active layer and uppermost permafrost. In particular, thick active layer formation results in more frequent thaw of the ice-rich transient layer. This addition of moisture, as well as infiltration from late season precipitation, results in high pore-water pressures (PWPs) at the base of the active layer and can potentially result in landscape degradation. To predict areas that have the potential for subsurface pressurization, we use susceptibility maps generated using a generalized additive model (GAM). As model response variables, we used active layer detachments (ALDs) and mud ejections (MEs), both formed by high PWP conditions at the Cape Bounty Arctic Watershed Observatory, Melville Island, Canada. As explanatory variables, we used the terrain characteristics elevation, slope, distance to water, topographic position index (TPI), potential incoming solar radiation (PISR), distance to water, normalized difference vegetation index (NDVI; ME model only), geology, and topographic wetness index (TWI). ALDs and MEs were accurately modelled in terms of susceptibility to disturbance across the study area. The susceptibility models demonstrate that ALDs are most probable on hill slopes with gradual to steep slopes and relatively low PISR, whereas MEs are associated with higher elevation areas, lower slope angles, and areas relatively far from water. Based on these results, this method identifies areas that may be sensitive to high PWPs and helps improve our understanding of geomorphic sensitivity to permafrost degradation. Article in Journal/Newspaper Arctic Ice permafrost The Cryosphere Melville Island Niedersächsisches Online-Archiv NOA Arctic Canada Cape Bounty ENVELOPE(-109.542,-109.542,74.863,74.863) Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) The Cryosphere 11 3 1403 1415 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Holloway, Jean E. Rudy, Ashley C. A. Lamoureux, Scott F. Treitz, Paul M. Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling |
topic_facet |
article Verlagsveröffentlichung |
description |
Warming of the Arctic in recent years has led to changes in the active layer and uppermost permafrost. In particular, thick active layer formation results in more frequent thaw of the ice-rich transient layer. This addition of moisture, as well as infiltration from late season precipitation, results in high pore-water pressures (PWPs) at the base of the active layer and can potentially result in landscape degradation. To predict areas that have the potential for subsurface pressurization, we use susceptibility maps generated using a generalized additive model (GAM). As model response variables, we used active layer detachments (ALDs) and mud ejections (MEs), both formed by high PWP conditions at the Cape Bounty Arctic Watershed Observatory, Melville Island, Canada. As explanatory variables, we used the terrain characteristics elevation, slope, distance to water, topographic position index (TPI), potential incoming solar radiation (PISR), distance to water, normalized difference vegetation index (NDVI; ME model only), geology, and topographic wetness index (TWI). ALDs and MEs were accurately modelled in terms of susceptibility to disturbance across the study area. The susceptibility models demonstrate that ALDs are most probable on hill slopes with gradual to steep slopes and relatively low PISR, whereas MEs are associated with higher elevation areas, lower slope angles, and areas relatively far from water. Based on these results, this method identifies areas that may be sensitive to high PWPs and helps improve our understanding of geomorphic sensitivity to permafrost degradation. |
format |
Article in Journal/Newspaper |
author |
Holloway, Jean E. Rudy, Ashley C. A. Lamoureux, Scott F. Treitz, Paul M. |
author_facet |
Holloway, Jean E. Rudy, Ashley C. A. Lamoureux, Scott F. Treitz, Paul M. |
author_sort |
Holloway, Jean E. |
title |
Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling |
title_short |
Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling |
title_full |
Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling |
title_fullStr |
Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling |
title_full_unstemmed |
Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling |
title_sort |
determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/tc-11-1403-2017 https://noa.gwlb.de/receive/cop_mods_00009788 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00009745/tc-11-1403-2017.pdf https://tc.copernicus.org/articles/11/1403/2017/tc-11-1403-2017.pdf |
long_lat |
ENVELOPE(-109.542,-109.542,74.863,74.863) ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
geographic |
Arctic Canada Cape Bounty Gam |
geographic_facet |
Arctic Canada Cape Bounty Gam |
genre |
Arctic Ice permafrost The Cryosphere Melville Island |
genre_facet |
Arctic Ice permafrost The Cryosphere Melville Island |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-11-1403-2017 https://noa.gwlb.de/receive/cop_mods_00009788 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00009745/tc-11-1403-2017.pdf https://tc.copernicus.org/articles/11/1403/2017/tc-11-1403-2017.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-11-1403-2017 |
container_title |
The Cryosphere |
container_volume |
11 |
container_issue |
3 |
container_start_page |
1403 |
op_container_end_page |
1415 |
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1766331326321917952 |