globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-11-609-2017
Scopus记录号: 2-s2.0-85013491496
论文题名:
Calving localization at Helheim Glacier using multiple local seismic stations
作者: Mei M; J; , Holland D; M; , Anandakrishnan S; , Zheng T
刊名: Cryosphere
ISSN: 19940416
出版年: 2017
卷: 11, 期:1
起始页码: 609
结束页码: 618
语种: 英语
英文关键词: arrival time ; iceberg calving ; P-wave ; Rayleigh wave ; S-wave ; seismic wave ; seismograph ; wave velocity ; Arctic ; Greenland ; Helheim Glacier
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).
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75590
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: Department of Applied Ocean Science and Engineering, Woods Hole Oceanographic InstitutionMA, United States; Department of Mechanical Engineering, Massachusetts Institute of TechnologyMA, United States; Courant Institute of Mathematical Sciences, New York University, 251 Mercer Street, New York, NY, United States; Department of Geosciences, Pennsylvania State University, University Park, PA, United States; Department of Physics, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates

Recommended Citation:
Mei M,J,, Holland D,et al. Calving localization at Helheim Glacier using multiple local seismic stations[J]. Cryosphere,2017-01-01,11(1)
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