Observation and modelling of snow at a polygonal tundra permafrost site: spatial variability and thermal implications

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. Notab...

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Bibliographic Details
Published in:The cryosphere 2018-11, Vol.12 (11), p.3693-3717
Main Authors: Gouttevin, Isabelle, Langer, Moritz, Löwe, Henning, Boike, Julia, Proksch, Martin, Schneebeli, Martin
Format: Article
Language:English
Subjects:
Adaptation
Anisotropy
Climate models
Computer simulation
Density
Depth
Depth hoar
Environmental aspects
Environmental Sciences
Microtopography
Modelling
Observations
Parameterization
Permafrost
Profiles
Properties
Sensitivity analysis
Slabs
Snow
Snow accumulation
Snowpack
Soil
Soil compaction
Soil improvement
Soil temperature
Spatial analysis
Spatial variability
Spatial variations
Taiga & tundra
Thermal conductivity
Thermal properties
Thermodynamic properties
Tundra
Tundras
Water vapor
Water vapour
Wind
Wind effects
X ray microtomography
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Summary: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 (K.sub.eff - 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.
ISSN:1994-0424
1994-0416
1994-0424
1994-0416
DOI:10.5194/tc-12-3693-2018