气候变化领域集成服务门户(CCPortal): Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes

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DOI	10.5194/tc-11-2957-2017
	Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes
	Mewes B.; Hilbich C.; Delaloye R.; Hauck C.
发表日期	2017
ISSN	19940416
卷号	11 期号:6
英文摘要	Geophysical methods are often used to characterize and monitor the subsurface composition of permafrost. The resolution capacity of standard methods, i.e. electrical resistivity tomography and refraction seismic tomography, depends not only on static parameters such as measurement geometry, but also on the temporal variability in the contrast of the geophysical target variables (electrical resistivity and P-wave velocity). Our study analyses the resolution capacity of electrical resistivity tomography and refraction seismic tomography for typical processes in the context of permafrost degradation using synthetic and field data sets of mountain permafrost terrain. In addition, we tested the resolution capacity of a petrophysically based quantitative combination of both methods, the so-called 4-phase model, and through this analysed the expected changes in water and ice content upon permafrost thaw. The results from the synthetic data experiments suggest a higher sensitivity regarding an increase in water content compared to a decrease in ice content. A potentially larger uncertainty originates from the individual geophysical methods than from the combined evaluation with the 4-phase model. In the latter, a loss of ground ice can be detected quite reliably, whereas artefacts occur in the case of increased horizontal or vertical water flow. Analysis of field data from a well-investigated rock glacier in the Swiss Alps successfully visualized the seasonal ice loss in summer and the complex spatially variable ice, water and air content changes in an interannual comparison. © 2017 Author(s).
学科领域	electrical resistivity; environmental monitoring; geophysical method; hydrological response; mountain environment; P-wave; permafrost; rock glacier; seismic tomography; soil degradation; spatial resolution; terrain; thawing; water flow; Alps; Switzerland
语种	英语
scopus关键词	electrical resistivity; environmental monitoring; geophysical method; hydrological response; mountain environment; P-wave; permafrost; rock glacier; seismic tomography; soil degradation; spatial resolution; terrain; thawing; water flow; Alps; Switzerland
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/119288
作者单位	Institute of Hydrology, Water Resources Management and Environmental Engineering, Ruhr-University Bochum, Bochum, 44801, Germany; Department of Geosciences, University of Fribourg, Fribourg, 1700, Switzerland
推荐引用方式 GB/T 7714	Mewes B.,Hilbich C.,Delaloye R.,et al. Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes[J],2017,11(6).
APA	Mewes B.,Hilbich C.,Delaloye R.,&Hauck C..(2017).Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes.Cryosphere,11(6).
MLA	Mewes B.,et al."Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes".Cryosphere 11.6(2017).