气候变化领域集成服务门户(CCPortal): Measuring snow water equivalent from common-offset GPR records through migration velocity analysis

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DOI	10.5194/tc-11-2997-2017
	Measuring snow water equivalent from common-offset GPR records through migration velocity analysis
	Clair J.St.; Steven Holbrook W.
发表日期	2017
ISSN	19940416
卷号	11 期号:6
英文摘要	Many mountainous regions depend on seasonal snowfall for their water resources. Current methods of predicting the availability of water resources rely on long-term relationships between stream discharge and snowpack monitoring at isolated locations, which are less reliable during abnormal snow years. Ground-penetrating radar (GPR) has been shown to be an effective tool for measuring snow water equivalent (SWE) because of the close relationship between snow density and radar velocity. However, the standard methods of measuring radar velocity can be time-consuming. Here we apply a migration focusing method originally developed for extracting velocity information from diffracted energy observed in zero-offset seismic sections to the problem of estimating radar velocities in seasonal snow from common-offset GPR data. Diffractions are isolated by planewave- destruction (PWD) filtering and the optimal migration velocity is chosen based on the varimax norm of the migrated image. We then use the radar velocity to estimate snow density, depth, and SWE. The GPR-derived SWE estimates are within 6% of manual SWE measurements when the GPR antenna is coupled to the snow surface and 3-21% of the manual measurements when the antenna is mounted on the front of a snowmobile 0.5m above the snow surface. © Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License.
学科领域	antenna; density; depth; diffraction; energy; ground penetrating radar; mountain region; river discharge; seasonal variation; snow water equivalent; snowpack; velocity; water availability
语种	英语
scopus关键词	antenna; density; depth; diffraction; energy; ground penetrating radar; mountain region; river discharge; seasonal variation; snow water equivalent; snowpack; velocity; water availability
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/119286
作者单位	Department of Geology and Geophysics, University of Wyoming, Laramie, WY 82071, United States; Department of Geological Sciences, University of Idaho, Idaho Falls, ID 83402, United States; Dept. of Geosciences, Virginia Tech, Blacksburg, VA 24061, United States
推荐引用方式 GB/T 7714	Clair J.St.,Steven Holbrook W.. Measuring snow water equivalent from common-offset GPR records through migration velocity analysis[J],2017,11(6).
APA	Clair J.St.,&Steven Holbrook W..(2017).Measuring snow water equivalent from common-offset GPR records through migration velocity analysis.Cryosphere,11(6).
MLA	Clair J.St.,et al."Measuring snow water equivalent from common-offset GPR records through migration velocity analysis".Cryosphere 11.6(2017).