Extraction and applications of Rayleigh wave ellipticity in polar regions

IF 2.5 4区 地球科学 Q2 GEOGRAPHY, PHYSICAL
Glenn A. Jones, B. Kulessa, A. Ferreira, M. Schimmel, A. Berbellini, A. Morelli
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引用次数: 0

Abstract

Abstract Seismic Rayleigh wave ellipticity measurements are the horizontal-to-vertical ratio of the Rayleigh wave particle motion, and are sensitive to the subsurface structure beneath a seismic station. H/V ratios measured from the ambient vibrations of the Earth are being increasingly used in glaciological applications to determine glacier and ice sheet thickness, seismic velocities and firn properties. Using the newly developed degree-of-polarisation (DOP-E) method which exploits the polarisation properties of seismic noise, we identify and extract Rayleigh waves from seismic stations in Greenland, and relate them to sea ice processes and the geology of the upper crust. Finally, we provide some suggestions for future applications of DOP-E method to gain greater insight into seasonal and long-term variability of sea ice formation and breakup as well as the monitoring of ice sheet thickness, subglacial environment and firn layers in the poles.
极区瑞利波椭圆度的提取及应用
摘要地震瑞利波椭圆率测量是瑞利波粒子运动的水平与垂直比,对地震台下的地下结构敏感。根据地球环境振动测量的H/V比越来越多地用于冰川学应用,以确定冰川和冰盖厚度、地震速度和冷杉特性。利用最新开发的偏振度(DOP-E)方法,利用地震噪声的偏振特性,我们识别和提取了格陵兰地震站的瑞利波,并将其与海冰过程和上地壳地质联系起来。最后,我们为DOP-E方法的未来应用提供了一些建议,以更好地了解海冰形成和破裂的季节和长期变化,以及对冰盖厚度、冰下环境和极地冷杉层的监测。
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来源期刊
Annals of Glaciology
Annals of Glaciology GEOGRAPHY, PHYSICAL-GEOSCIENCES, MULTIDISCIPLINARY
CiteScore
8.20
自引率
0.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: Annals of Glaciology publishes original scientific articles and letters in selected aspects of glaciology-the study of ice. Each issue of the Annals is thematic, focussing on a specific subject. The Council of the International Glaciological Society welcomes proposals for thematic issues from the glaciological community. Once a theme is approved, the Council appoints an Associate Chief Editor and a team of Scientific Editors to handle the submission, peer review and publication of papers.
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