Observation and modelling of snow at a polygonal tundra permafrost site: Spatial variability and thermal implications
[Departement_IRSTEA]Eaux [ADD1_IRSTEA]Hydrosystèmes et risques naturels International audience The shortage of information on snow properties in high latitudes places a major limitation on permafrost and more generally climate modelling. A dedicated field program was therefore carried out to investi...
Published in: | The Cryosphere |
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Online Access: | https://hal.inrae.fr/hal-02608575 https://hal.inrae.fr/hal-02608575/document https://hal.inrae.fr/hal-02608575/file/pub00060038.pdf https://doi.org/10.5194/tc-12-3693-2018 |
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ftunigrenoble:oai:HAL:hal-02608575v1 2024-05-12T08:00:20+00:00 Observation and modelling of snow at a polygonal tundra permafrost site: Spatial variability and thermal implications Gouttevin, I. Langer, Moritz Lowe, H. Boike, J. Proksch, M. Schneebeli, M. RiverLy - Fonctionnement des hydrosystèmes Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) ALFRED WEGENER INSTITUTE HELMHOLTZ CENTER FOR POLAR AND MARINE RESEARCH POTSDAM DEU Partenaires IRSTEA Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Humboldt-Universität zu Berlin = Humboldt University of Berlin = Université Humboldt de Berlin (HU Berlin) WSL INSTITUTE FOR SNOW AND AVALANCHE RESEARCH SLF DAVOS DORF CHE DEPARTMENT OF GEOGRAPHY HUMBOLDT UNIVERSITAT ZU BERLIN DEU 2018 https://hal.inrae.fr/hal-02608575 https://hal.inrae.fr/hal-02608575/document https://hal.inrae.fr/hal-02608575/file/pub00060038.pdf https://doi.org/10.5194/tc-12-3693-2018 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-12-3693-2018 hal-02608575 https://hal.inrae.fr/hal-02608575 https://hal.inrae.fr/hal-02608575/document https://hal.inrae.fr/hal-02608575/file/pub00060038.pdf doi:10.5194/tc-12-3693-2018 IRSTEA: PUB00060038 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.inrae.fr/hal-02608575 The Cryosphere, 2018, 12 (11), pp.3693-3717. ⟨10.5194/tc-12-3693-2018⟩ [SDE]Environmental Sciences info:eu-repo/semantics/article Journal articles 2018 ftunigrenoble https://doi.org/10.5194/tc-12-3693-2018 2024-04-18T03:33:48Z [Departement_IRSTEA]Eaux [ADD1_IRSTEA]Hydrosystèmes et risques naturels International audience The shortage of information on snow properties in high latitudes places a major limitation on permafrost and more generally climate modelling. A dedicated field program was therefore carried out to investigate snow properties and their spatial variability at a polygonal tundra permafrost site. Notably, snow samples were analysed for surface-normal thermal conductivity (Keff-z) based on X-ray microtomography. Also, the detailed snow model SNOWPACK was adapted to these Arctic conditions to enable relevant simulations of the ground thermal regime. Finally, the sensitivity of soil temperatures to snow spatial variability was analysed. Within a typical tundra snowpack composed of depth hoar overlain by wind slabs, depth hoar samples were found more conductive (Keff-z = 0.22±0.05 Wm-1K-1) than in most previously published studies, which could be explained by their high density and microstructural anisotropy. Spatial variations in the thermal properties of the snowpack were well explained by the microtopography and ground surface conditions of the polygonal tundra, which control depth hoar growth and snow accumulation. Our adaptations to SNOWPACK, phenomenologically taking into account the effects of wind compaction, basal vegetation, and water vapour flux, yielded realistic density and K Keff-z profiles that greatly improved simulations of the ground thermal regime. Also, a density- and anisotropy-based parameterization for Keff-z lead to further slight improvements. Soil temperatures were found to be particularly sensitive to snow conditions during the early winter and polar night, highlighting the need for improved snow characterization and modelling over this period. Article in Journal/Newspaper Arctic permafrost polar night The Cryosphere Tundra Université Grenoble Alpes: HAL Arctic The Cryosphere 12 11 3693 3717 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Gouttevin, I. Langer, Moritz Lowe, H. Boike, J. Proksch, M. Schneebeli, M. Observation and modelling of snow at a polygonal tundra permafrost site: Spatial variability and thermal implications |
topic_facet |
[SDE]Environmental Sciences |
description |
[Departement_IRSTEA]Eaux [ADD1_IRSTEA]Hydrosystèmes et risques naturels International audience The shortage of information on snow properties in high latitudes places a major limitation on permafrost and more generally climate modelling. A dedicated field program was therefore carried out to investigate snow properties and their spatial variability at a polygonal tundra permafrost site. Notably, snow samples were analysed for surface-normal thermal conductivity (Keff-z) based on X-ray microtomography. Also, the detailed snow model SNOWPACK was adapted to these Arctic conditions to enable relevant simulations of the ground thermal regime. Finally, the sensitivity of soil temperatures to snow spatial variability was analysed. Within a typical tundra snowpack composed of depth hoar overlain by wind slabs, depth hoar samples were found more conductive (Keff-z = 0.22±0.05 Wm-1K-1) than in most previously published studies, which could be explained by their high density and microstructural anisotropy. Spatial variations in the thermal properties of the snowpack were well explained by the microtopography and ground surface conditions of the polygonal tundra, which control depth hoar growth and snow accumulation. Our adaptations to SNOWPACK, phenomenologically taking into account the effects of wind compaction, basal vegetation, and water vapour flux, yielded realistic density and K Keff-z profiles that greatly improved simulations of the ground thermal regime. Also, a density- and anisotropy-based parameterization for Keff-z lead to further slight improvements. Soil temperatures were found to be particularly sensitive to snow conditions during the early winter and polar night, highlighting the need for improved snow characterization and modelling over this period. |
author2 |
RiverLy - Fonctionnement des hydrosystèmes Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Université Grenoble Alpes 2016-2019 (UGA 2016-2019 ) ALFRED WEGENER INSTITUTE HELMHOLTZ CENTER FOR POLAR AND MARINE RESEARCH POTSDAM DEU Partenaires IRSTEA Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA) Humboldt-Universität zu Berlin = Humboldt University of Berlin = Université Humboldt de Berlin (HU Berlin) WSL INSTITUTE FOR SNOW AND AVALANCHE RESEARCH SLF DAVOS DORF CHE DEPARTMENT OF GEOGRAPHY HUMBOLDT UNIVERSITAT ZU BERLIN DEU |
format |
Article in Journal/Newspaper |
author |
Gouttevin, I. Langer, Moritz Lowe, H. Boike, J. Proksch, M. Schneebeli, M. |
author_facet |
Gouttevin, I. Langer, Moritz Lowe, H. Boike, J. Proksch, M. Schneebeli, M. |
author_sort |
Gouttevin, I. |
title |
Observation and modelling of snow at a polygonal tundra permafrost site: Spatial variability and thermal implications |
title_short |
Observation and modelling of snow at a polygonal tundra permafrost site: Spatial variability and thermal implications |
title_full |
Observation and modelling of snow at a polygonal tundra permafrost site: Spatial variability and thermal implications |
title_fullStr |
Observation and modelling of snow at a polygonal tundra permafrost site: Spatial variability and thermal implications |
title_full_unstemmed |
Observation and modelling of snow at a polygonal tundra permafrost site: Spatial variability and thermal implications |
title_sort |
observation and modelling of snow at a polygonal tundra permafrost site: spatial variability and thermal implications |
publisher |
HAL CCSD |
publishDate |
2018 |
url |
https://hal.inrae.fr/hal-02608575 https://hal.inrae.fr/hal-02608575/document https://hal.inrae.fr/hal-02608575/file/pub00060038.pdf https://doi.org/10.5194/tc-12-3693-2018 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic permafrost polar night The Cryosphere Tundra |
genre_facet |
Arctic permafrost polar night The Cryosphere Tundra |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.inrae.fr/hal-02608575 The Cryosphere, 2018, 12 (11), pp.3693-3717. ⟨10.5194/tc-12-3693-2018⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-12-3693-2018 hal-02608575 https://hal.inrae.fr/hal-02608575 https://hal.inrae.fr/hal-02608575/document https://hal.inrae.fr/hal-02608575/file/pub00060038.pdf doi:10.5194/tc-12-3693-2018 IRSTEA: PUB00060038 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-12-3693-2018 |
container_title |
The Cryosphere |
container_volume |
12 |
container_issue |
11 |
container_start_page |
3693 |
op_container_end_page |
3717 |
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1798842197566554112 |