气候变化领域集成服务门户(CCPortal): Distributed Acoustic Sensing of Seismic Properties in a Borehole Drilled on a Fast-Flowing Greenlandic Outlet Glacier

CCPortal

DOI	10.1029/2020GL088148
	Distributed Acoustic Sensing of Seismic Properties in a Borehole Drilled on a Fast-Flowing Greenlandic Outlet Glacier
	Booth A.D.; Christoffersen P.; Schoonman C.; Clarke A.; Hubbard B.; Law R.; Doyle S.H.; Chudley T.R.; Chalari A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:13
英文摘要	Distributed Acoustic Sensing (DAS) is a new technology in which seismic energy is detected, at high spatial and temporal resolution, using the propagation of laser pulses in a fiber-optic cable. We show analyses from the first glaciological borehole DAS deployment to measure the englacial and subglacial seismic properties of Store Glacier, a fast-flowing outlet of the Greenland Ice Sheet. We record compressional and shear waves in 1,043 m-deep vertical seismic profiles, sampled at 10 m vertical resolution, and detect a transition from isotropic to anisotropic ice at 84% of ice thickness, consistent with the Holocene-Wisconsin transition. We identify subglacial reflections originating from the base of a 20 m-thick layer of consolidated sediment and, from attenuation measurements, interpret temperate ice in the lowermost 100 m of the glacier. Our findings highlight the promising potential of DAS technology to constrain the seismic properties of glaciers and ice sheets. © 2020. The Authors.
英文关键词	Boreholes; Glaciers; Seismology; Shear flow; Shear waves; Acoustic sensing; Attenuation measurements; Greenland Ice Sheet; Seismic energy; Seismic properties; Spatial and temporal resolutions; Vertical resolution; Vertical seismic profiles; Ice; acoustic survey; borehole; consolidation; glacial deposit; ice core; S-wave; sediment transport; seismic anisotropy; seismic data; wave propagation; Arctic; Greenland; Greenland Ice Sheet; Store Glacier
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170162
作者单位	Institute of Applied Geoscience, School of Earth and Environment, University of Leeds, Leeds, United Kingdom; Scott Polar Research Institute, Department of Geography, University of Cambridge, Cambridge, United Kingdom; Silixa Ltd, Elstree, Hertfordshire, United Kingdom; Centre for Glaciology, Department of Geography and Earth Sciences, Aberystwyth University, Aberystwyth, Ceredigion, United Kingdom
推荐引用方式 GB/T 7714	Booth A.D.,Christoffersen P.,Schoonman C.,et al. Distributed Acoustic Sensing of Seismic Properties in a Borehole Drilled on a Fast-Flowing Greenlandic Outlet Glacier[J],2020,47(13).
APA	Booth A.D..,Christoffersen P..,Schoonman C..,Clarke A..,Hubbard B..,...&Chalari A..(2020).Distributed Acoustic Sensing of Seismic Properties in a Borehole Drilled on a Fast-Flowing Greenlandic Outlet Glacier.Geophysical Research Letters,47(13).
MLA	Booth A.D.,et al."Distributed Acoustic Sensing of Seismic Properties in a Borehole Drilled on a Fast-Flowing Greenlandic Outlet Glacier".Geophysical Research Letters 47.13(2020).