气候变化领域集成服务门户(CCPortal): Resolving the influence of temperature forcing through heat conduction on rock glacier dynamics: A numerical modelling approach

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DOI	10.5194/tc-13-927-2019
	Resolving the influence of temperature forcing through heat conduction on rock glacier dynamics: A numerical modelling approach
	Cicoira A.; Beutel J.; Faillettaz J.; Gärtner-Roer I.; Vieli A.
发表日期	2019
ISSN	19940416
EISSN	13
起始页码	927
结束页码	942
卷号	13 期号:3
英文摘要	In recent years, observations have highlighted seasonal and interannual variability in rock glacier flow. Temperature forcing, through heat conduction, has been proposed as one of the key processes to explain these variations in kinematics. However, this mechanism has not yet been quantitatively assessed against real-world data. We present a 1-D numerical modelling approach that couples heat conduction to an empirically derived creep model for ice-rich frozen soils. We use this model to investigate the effect of thermal heat conduction on seasonal and interannual variability in rock glacier flow velocity. We compare the model results with borehole temperature data and surface velocity measurements from the PERMOS and PermaSense monitoring network available for the Swiss Alps. We further conduct a model sensitivity analysis in order to resolve the importance of the different model parameters. Using the prescribed empirically derived rheology and observed near-surface temperatures, we are able to model the correct order of magnitude of creep. However, both interannual and seasonal variability are underestimated by an order of magnitude, implying that heat conduction alone cannot explain the observed variations. Therefore, we conclude that non-conductive processes, likely linked to water availability, must dominate the short-term velocity signal. © 2019 The Author(s).
学科领域	annual variation; glacier dynamics; glacier flow; modeling; numerical model; rock glacier; seasonal variation; sensitivity analysis; surface temperature; Alps
语种	英语
scopus关键词	annual variation; glacier dynamics; glacier flow; modeling; numerical model; rock glacier; seasonal variation; sensitivity analysis; surface temperature; Alps
来源期刊	The Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/118908
作者单位	Department of Geography, University of Zurich, Zurich, Switzerland; Computer Engineering and Networks Laboratory, ETH, Zurich, Switzerland
推荐引用方式 GB/T 7714	Cicoira A.,Beutel J.,Faillettaz J.,et al. Resolving the influence of temperature forcing through heat conduction on rock glacier dynamics: A numerical modelling approach[J],2019,13(3).
APA	Cicoira A.,Beutel J.,Faillettaz J.,Gärtner-Roer I.,&Vieli A..(2019).Resolving the influence of temperature forcing through heat conduction on rock glacier dynamics: A numerical modelling approach.The Cryosphere,13(3).
MLA	Cicoira A.,et al."Resolving the influence of temperature forcing through heat conduction on rock glacier dynamics: A numerical modelling approach".The Cryosphere 13.3(2019).