DOI: 10.5194/tc-11-2957-2017
Scopus记录号: 2-s2.0-85038443830
论文题名: Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes
作者: Mewes B ; , Hilbich C ; , Delaloye R ; , Hauck C
刊名: Cryosphere
ISSN: 19940416
出版年: 2017
卷: 11, 期: 6 起始页码: 2957
结束页码: 2974
语种: 英语
英文关键词: 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
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). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75457
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: Institute of Hydrology, Water Resources Management and Environmental Engineering, Ruhr-University Bochum, Bochum, Germany; Department of Geosciences, University of Fribourg, Fribourg, Switzerland
Recommended Citation:
Mewes B,, Hilbich C,, Delaloye R,et al. Resolution capacity of geophysical monitoring regarding permafrost degradation induced by hydrological processes[J]. Cryosphere,2017-01-01,11(6)