气候变化领域集成服务门户(CCPortal): Warming permafrost and active layer variability at Cime Bianche, Western European Alps

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DOI	10.5194/tc-9-647-2015
	Warming permafrost and active layer variability at Cime Bianche, Western European Alps
	Pogliotti P.; Guglielmin M.; Cremonese E.; Morra Di Cella U.; Filippa G.; Pellet C.; Hauck C.
发表日期	2015
ISSN	19940416
卷号	9 期号:2
英文摘要	The objective of this paper is to provide a first synthesis on the state and recent evolution of permafrost at the monitoring site of Cime Bianche (3100 m a.s.l.) on the Italian side of the Western Alps. The analysis is based on 7 years of ground temperature observations in two boreholes and seven surface points. The analysis aims to quantify the spatial and temporal variability of ground surface temperature in relation to snow cover, the small-scale spatial variability of the active layer thickness and current temperature trends in deep permafrost. Results show that the heterogeneity of snow cover thickness, both in space and time, is the main factor controlling ground surface temperatures and leads to a mean range of spatial variability (2.5 ± 0.1 °C) which far exceeds the mean range of observed inter-annual variability (1.6 ± 0.1 °C). The active layer thickness measured in two boreholes at a distance of 30 m shows a mean difference of 2.0 ± 0.1 m with the active layer of one borehole consistently deeper. As revealed by temperature analysis and geophysical soundings, such a difference is mainly driven by the ice/water content in the sub-surface and not by the snow cover regimes. The analysis of deep temperature time series reveals that permafrost is warming. The detected trends are statistically significant starting from a depth below 8 m with warming rates between 0.1 and 0.01 °C yr-1. © Author(s) 2015.
学科领域	active layer; borehole; permafrost; snow cover; spatial variation; surface temperature; temporal evolution; warming; Alps
语种	英语
scopus关键词	active layer; borehole; permafrost; snow cover; spatial variation; surface temperature; temporal evolution; warming; Alps
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/119922
作者单位	Environmental Protection Agency of Valle d'Aosta, Saint Christophe, Italy; Department of Theoretical and Applied Sciences, Insubria University, Varese, Italy; Department of Geosciences, University of Fribourg, Fribourg, Switzerland
推荐引用方式 GB/T 7714	Pogliotti P.,Guglielmin M.,Cremonese E.,et al. Warming permafrost and active layer variability at Cime Bianche, Western European Alps[J],2015,9(2).
APA	Pogliotti P..,Guglielmin M..,Cremonese E..,Morra Di Cella U..,Filippa G..,...&Hauck C..(2015).Warming permafrost and active layer variability at Cime Bianche, Western European Alps.Cryosphere,9(2).
MLA	Pogliotti P.,et al."Warming permafrost and active layer variability at Cime Bianche, Western European Alps".Cryosphere 9.2(2015).