DOI: 10.5194/tc-8-2063-2014
Scopus记录号: 2-s2.0-84910596472
论文题名: A statistical approach to represent small-scale variability of permafrost temperatures due to snow cover
作者: Gisnås K ; , Westermann S ; , Schuler T ; V ; , Litherland T ; , Isaksen K ; , Boike J ; , Etzelmüller B
刊名: Cryosphere
ISSN: 19940416
出版年: 2014
卷: 8, 期: 6 起始页码: 2063
结束页码: 2074
语种: 英语
英文关键词: permafrost
; snow cover
; surface temperature
; temperature effect
; thermal regime
; variance analysis
; wind
; Norway
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74768
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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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
Recommended Citation:
Gisnås K,, Westermann S,, Schuler T,et al. A statistical approach to represent small-scale variability of permafrost temperatures due to snow cover[J]. Cryosphere,2014-01-01,8(6)