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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fttriple:oai:gotriple.eu:oai:doaj.org/article:b1aea1343ea3411f8c28894f7232ab44 2023-05-15T14:59:16+02:00 Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling J. E. Holloway A. C. A. Rudy S. F. Lamoureux P. M. Treitz 2017-06-01 https://doi.org/10.5194/tc-11-1403-2017 http://www.the-cryosphere.net/11/1403/2017/tc-11-1403-2017.pdf https://doaj.org/article/b1aea1343ea3411f8c28894f7232ab44 en eng Copernicus Publications doi:10.5194/tc-11-1403-2017 1994-0416 1994-0424 http://www.the-cryosphere.net/11/1403/2017/tc-11-1403-2017.pdf https://doaj.org/article/b1aea1343ea3411f8c28894f7232ab44 undefined The Cryosphere, Vol 11, Pp 1403-1415 (2017) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2017 fttriple https://doi.org/10.5194/tc-11-1403-2017 2023-01-22T18:19:04Z 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 Unknown 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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Unknown |
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fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir J. E. Holloway A. C. A. Rudy S. F. Lamoureux P. M. Treitz Determining the terrain characteristics related to the surface expression of subsurface water pressurization in permafrost landscapes using susceptibility modelling |
topic_facet |
geo envir |
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 |
J. E. Holloway A. C. A. Rudy S. F. Lamoureux P. M. Treitz |
author_facet |
J. E. Holloway A. C. A. Rudy S. F. Lamoureux P. M. Treitz |
author_sort |
J. E. Holloway |
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 http://www.the-cryosphere.net/11/1403/2017/tc-11-1403-2017.pdf https://doaj.org/article/b1aea1343ea3411f8c28894f7232ab44 |
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_source |
The Cryosphere, Vol 11, Pp 1403-1415 (2017) |
op_relation |
doi:10.5194/tc-11-1403-2017 1994-0416 1994-0424 http://www.the-cryosphere.net/11/1403/2017/tc-11-1403-2017.pdf https://doaj.org/article/b1aea1343ea3411f8c28894f7232ab44 |
op_rights |
undefined |
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 |
_version_ |
1766331387100528640 |