气候变化领域集成服务门户(CCPortal): Calving localization at Helheim Glacier using multiple local seismic stations

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DOI	10.5194/tc-11-609-2017
	Calving localization at Helheim Glacier using multiple local seismic stations
	Mei M.J.; Holland D.M.; Anandakrishnan S.; Zheng T.
发表日期	2017
ISSN	19940416
卷号	11 期号:1
英文摘要	A multiple-station technique for localizing glacier calving events is applied to Helheim Glacier in southeastern Greenland. The difference in seismic-wave arrival times between each pairing of four local seismometers is used to generate a locus of possible event origins in the shape of a hyperbola. The intersection of the hyperbolas provides an estimate of the calving location. This method is used as the P and S waves are not distinguishable due to the proximity of the local seismometers to the event and the emergent nature of calving signals. We find that the seismic waves that arrive at the seismometers are dominated by surface (Rayleigh) waves. The surface-wave velocity for Helheim Glacier is estimated using a grid search with 11 calving events identified at Helheim from August 2014 to August 2015. From this, a catalogue of 11 calving locations is generated, showing that calving preferentially happens at the northern end of Helheim Glacier. © 2017 The Author(s).
学科领域	arrival time; iceberg calving; P-wave; Rayleigh wave; S-wave; seismic wave; seismograph; wave velocity; Arctic; Greenland; Helheim Glacier
语种	英语
scopus关键词	arrival time; iceberg calving; P-wave; Rayleigh wave; S-wave; seismic wave; seismograph; wave velocity; Arctic; Greenland; Helheim Glacier
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/119432
作者单位	Department of Applied Ocean Science and Engineering, Woods Hole Oceanographic InstitutionMA 02540, United States; Department of Mechanical Engineering, Massachusetts Institute of TechnologyMA 02139, United States; Courant Institute of Mathematical Sciences, New York University, 251 Mercer Street, New York, NY 10012, United States; Department of Geosciences, Pennsylvania State University, University Park, PA 16801, United States; Department of Physics, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates
推荐引用方式 GB/T 7714	Mei M.J.,Holland D.M.,Anandakrishnan S.,et al. Calving localization at Helheim Glacier using multiple local seismic stations[J],2017,11(1).
APA	Mei M.J.,Holland D.M.,Anandakrishnan S.,&Zheng T..(2017).Calving localization at Helheim Glacier using multiple local seismic stations.Cryosphere,11(1).
MLA	Mei M.J.,et al."Calving localization at Helheim Glacier using multiple local seismic stations".Cryosphere 11.1(2017).