Icings and groundwater conditions in permafrost catchments of northwestern Canada

Abstract Icings are sheet-like masses of ice that form on the ground surface or in fluvial channels from groundwater seepage. Although the presence of icings in the landscape is known, few studies investigated their regional distribution and explored relations with terrain factors including permafro...

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Autores principales:	Hugo Crites, Steve V. Kokelj, Denis Lacelle
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5110c89e93994117b8f4bf87e02d23a6
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id	oai:doaj.org-article:5110c89e93994117b8f4bf87e02d23a6
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spelling	oai:doaj.org-article:5110c89e93994117b8f4bf87e02d23a62021-12-02T10:59:18ZIcings and groundwater conditions in permafrost catchments of northwestern Canada10.1038/s41598-020-60322-w2045-2322https://doaj.org/article/5110c89e93994117b8f4bf87e02d23a62020-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-60322-whttps://doaj.org/toc/2045-2322Abstract Icings are sheet-like masses of ice that form on the ground surface or in fluvial channels from groundwater seepage. Although the presence of icings in the landscape is known, few studies investigated their regional distribution and explored relations with terrain factors including permafrost and winter baseflow conditions. Here, we mapped the distribution of icings in a 618,430 km2 area of northwestern Canada from a stack of 573 Landsat imageries (1985–2017) and determined using hydrometric data the winter baseflow contribution to the total annual discharge of 17 rivers in the study area. The 1402 mapped icings occur preferentially at the foothills of heavily faulted karstic mountainous regions in the continuous permafrost. Winter baseflow and its contribution to annual discharge was lower in continuous permafrost catchments than in discontinuous permafrost but showed a general increase over the 1970–2016 period. As such, the distribution of icings appears to be sensitive to winter air temperatures and winter baseflow conditions and icings located at the southern boundary of continuous permafrost would be more sensitive to degrading permafrost and the predicted increase in winter baseflow.Hugo CritesSteve V. KokeljDenis LacelleNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hugo Crites Steve V. Kokelj Denis Lacelle Icings and groundwater conditions in permafrost catchments of northwestern Canada
description	Abstract Icings are sheet-like masses of ice that form on the ground surface or in fluvial channels from groundwater seepage. Although the presence of icings in the landscape is known, few studies investigated their regional distribution and explored relations with terrain factors including permafrost and winter baseflow conditions. Here, we mapped the distribution of icings in a 618,430 km2 area of northwestern Canada from a stack of 573 Landsat imageries (1985–2017) and determined using hydrometric data the winter baseflow contribution to the total annual discharge of 17 rivers in the study area. The 1402 mapped icings occur preferentially at the foothills of heavily faulted karstic mountainous regions in the continuous permafrost. Winter baseflow and its contribution to annual discharge was lower in continuous permafrost catchments than in discontinuous permafrost but showed a general increase over the 1970–2016 period. As such, the distribution of icings appears to be sensitive to winter air temperatures and winter baseflow conditions and icings located at the southern boundary of continuous permafrost would be more sensitive to degrading permafrost and the predicted increase in winter baseflow.
format	article
author	Hugo Crites Steve V. Kokelj Denis Lacelle
author_facet	Hugo Crites Steve V. Kokelj Denis Lacelle
author_sort	Hugo Crites
title	Icings and groundwater conditions in permafrost catchments of northwestern Canada
title_short	Icings and groundwater conditions in permafrost catchments of northwestern Canada
title_full	Icings and groundwater conditions in permafrost catchments of northwestern Canada
title_fullStr	Icings and groundwater conditions in permafrost catchments of northwestern Canada
title_full_unstemmed	Icings and groundwater conditions in permafrost catchments of northwestern Canada
title_sort	icings and groundwater conditions in permafrost catchments of northwestern canada
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/5110c89e93994117b8f4bf87e02d23a6
work_keys_str_mv	AT hugocrites icingsandgroundwaterconditionsinpermafrostcatchmentsofnorthwesterncanada AT stevevkokelj icingsandgroundwaterconditionsinpermafrostcatchmentsofnorthwesterncanada AT denislacelle icingsandgroundwaterconditionsinpermafrostcatchmentsofnorthwesterncanada
_version_	1718396351776030720

Icings and groundwater conditions in permafrost catchments of northwestern Canada

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