气候变化领域集成服务门户(CCPortal): A statistical approach to represent small-scale variability of permafrost temperatures due to snow cover

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DOI	10.5194/tc-8-2063-2014
	A statistical approach to represent small-scale variability of permafrost temperatures due to snow cover
	Gisnås K.; Westermann S.; Schuler T.V.; Litherland T.; Isaksen K.; Boike J.; Etzelmüller B.
发表日期	2014
ISSN	19940416
卷号	8 期号:6
英文摘要	In permafrost environments exposed to strong winds, drifting snow can create a small-scale pattern of strongly variable snow heights, which has profound implications for the thermal regime of the ground. Arrays of 26 to more than 100 temperature loggers were installed to record the distribution of ground surface temperatures within three study areas across a climatic gradient from continuous to sporadic permafrost in Norway. A variability of the mean annual ground surface temperature of up to 6°C was documented within areas of 0.5 km2. The observed variation can, to a large degree, be explained by variation in snow height. Permafrost models, employing averages of snow height for grid cells of, e.g., 1 km2, are not capable of representing such sub-grid variability. We propose a statistical representation of the sub-grid variability of ground surface temperatures and demonstrate that a simple equilibrium permafrost model can reproduce the temperature distribution within a grid cell based on the distribution of snow heights. © Author(s) 2014. CC Attribution 3.0 License.
学科领域	permafrost; snow cover; surface temperature; temperature effect; thermal regime; variance analysis; wind; Norway
语种	英语
scopus关键词	permafrost; snow cover; surface temperature; temperature effect; thermal regime; variance analysis; wind; Norway
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120032
作者单位	Department of Geosciences, University of Oslo, Oslo, Norway; Center for Permafrost, Department of Geography and Geology, University of Copenhagen, Copenhagen, Denmark; Norwegian Meteorological Institute, Oslo, Norway; Alfred Wegener Institute, Potsdam, Germany
推荐引用方式 GB/T 7714	Gisnås K.,Westermann S.,Schuler T.V.,et al. A statistical approach to represent small-scale variability of permafrost temperatures due to snow cover[J],2014,8(6).
APA	Gisnås K..,Westermann S..,Schuler T.V..,Litherland T..,Isaksen K..,...&Etzelmüller B..(2014).A statistical approach to represent small-scale variability of permafrost temperatures due to snow cover.Cryosphere,8(6).
MLA	Gisnås K.,et al."A statistical approach to represent small-scale variability of permafrost temperatures due to snow cover".Cryosphere 8.6(2014).