Nonlinear thermal and moisture response of ice-wedge polygons to permafrost disturbance increases heterogeneity of high Arctic wetland
Low-center polygonal terrains with gentle sloping surfaces and lowlands in the high Arctic have a potential to retain water in the lower central portion of ice-wedge polygons and are considered high-latitude wetlands. Such wetlands in the continuous permafrost regions have an important ecological ro...
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Copernicus Publications
2016
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00013879 2023-05-15T13:03:06+02:00 Nonlinear thermal and moisture response of ice-wedge polygons to permafrost disturbance increases heterogeneity of high Arctic wetland Godin, Etienne Fortier, Daniel Lévesque, Esther 2016-03 electronic https://doi.org/10.5194/bg-13-1439-2016 https://noa.gwlb.de/receive/cop_mods_00013879 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00013835/bg-13-1439-2016.pdf https://bg.copernicus.org/articles/13/1439/2016/bg-13-1439-2016.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-13-1439-2016 https://noa.gwlb.de/receive/cop_mods_00013879 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00013835/bg-13-1439-2016.pdf https://bg.copernicus.org/articles/13/1439/2016/bg-13-1439-2016.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2016 ftnonlinearchiv https://doi.org/10.5194/bg-13-1439-2016 2022-02-08T22:55:25Z Low-center polygonal terrains with gentle sloping surfaces and lowlands in the high Arctic have a potential to retain water in the lower central portion of ice-wedge polygons and are considered high-latitude wetlands. Such wetlands in the continuous permafrost regions have an important ecological role in an otherwise generally arid region. In the valley of the glacier C-79 on Bylot Island (Nunavut, Canada), thermal erosion gullies were rapidly eroding the permafrost along ice wedges affecting the integrity of the polygons by breaching and collapsing the surrounding rims. Intact polygons were characterized by a relative homogeneity in terms of topography, snow cover, maximum active layer thaw depth, ground moisture content and vegetation cover (where eroded polygons responded nonlinearly to perturbations, which resulted in differing conditions in the latter elements). The heterogeneous nature of disturbed terrains impacted active layer thickness, ground ice aggradation in the upper portion of permafrost, soil moisture, vegetation dynamics and carbon storage. Article in Journal/Newspaper Active layer thickness Arctic Bylot Island glacier* Ice Nunavut permafrost wedge* Niedersächsisches Online-Archiv NOA Arctic Bylot Island Canada Nunavut Biogeosciences 13 5 1439 1452 |
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Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Godin, Etienne Fortier, Daniel Lévesque, Esther Nonlinear thermal and moisture response of ice-wedge polygons to permafrost disturbance increases heterogeneity of high Arctic wetland |
topic_facet |
article Verlagsveröffentlichung |
description |
Low-center polygonal terrains with gentle sloping surfaces and lowlands in the high Arctic have a potential to retain water in the lower central portion of ice-wedge polygons and are considered high-latitude wetlands. Such wetlands in the continuous permafrost regions have an important ecological role in an otherwise generally arid region. In the valley of the glacier C-79 on Bylot Island (Nunavut, Canada), thermal erosion gullies were rapidly eroding the permafrost along ice wedges affecting the integrity of the polygons by breaching and collapsing the surrounding rims. Intact polygons were characterized by a relative homogeneity in terms of topography, snow cover, maximum active layer thaw depth, ground moisture content and vegetation cover (where eroded polygons responded nonlinearly to perturbations, which resulted in differing conditions in the latter elements). The heterogeneous nature of disturbed terrains impacted active layer thickness, ground ice aggradation in the upper portion of permafrost, soil moisture, vegetation dynamics and carbon storage. |
format |
Article in Journal/Newspaper |
author |
Godin, Etienne Fortier, Daniel Lévesque, Esther |
author_facet |
Godin, Etienne Fortier, Daniel Lévesque, Esther |
author_sort |
Godin, Etienne |
title |
Nonlinear thermal and moisture response of ice-wedge polygons to permafrost disturbance increases heterogeneity of high Arctic wetland |
title_short |
Nonlinear thermal and moisture response of ice-wedge polygons to permafrost disturbance increases heterogeneity of high Arctic wetland |
title_full |
Nonlinear thermal and moisture response of ice-wedge polygons to permafrost disturbance increases heterogeneity of high Arctic wetland |
title_fullStr |
Nonlinear thermal and moisture response of ice-wedge polygons to permafrost disturbance increases heterogeneity of high Arctic wetland |
title_full_unstemmed |
Nonlinear thermal and moisture response of ice-wedge polygons to permafrost disturbance increases heterogeneity of high Arctic wetland |
title_sort |
nonlinear thermal and moisture response of ice-wedge polygons to permafrost disturbance increases heterogeneity of high arctic wetland |
publisher |
Copernicus Publications |
publishDate |
2016 |
url |
https://doi.org/10.5194/bg-13-1439-2016 https://noa.gwlb.de/receive/cop_mods_00013879 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00013835/bg-13-1439-2016.pdf https://bg.copernicus.org/articles/13/1439/2016/bg-13-1439-2016.pdf |
geographic |
Arctic Bylot Island Canada Nunavut |
geographic_facet |
Arctic Bylot Island Canada Nunavut |
genre |
Active layer thickness Arctic Bylot Island glacier* Ice Nunavut permafrost wedge* |
genre_facet |
Active layer thickness Arctic Bylot Island glacier* Ice Nunavut permafrost wedge* |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-13-1439-2016 https://noa.gwlb.de/receive/cop_mods_00013879 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00013835/bg-13-1439-2016.pdf https://bg.copernicus.org/articles/13/1439/2016/bg-13-1439-2016.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-13-1439-2016 |
container_title |
Biogeosciences |
container_volume |
13 |
container_issue |
5 |
container_start_page |
1439 |
op_container_end_page |
1452 |
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1766328151928995840 |