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Extraction and applications of Rayleigh wave ellipticity in polar regions

Glenn Jones, Bernd Kulessa Orcid Logo, Ana M. G. Ferreira Orcid Logo, Martin Schimmel Orcid Logo, Andrea Berbellini Orcid Logo, Andrea Morelli Orcid Logo

Annals of Glaciology, Volume: 63, Issue: 87-89, Pages: 3 - 7

Swansea University Authors: Glenn Jones, Bernd Kulessa Orcid Logo

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DOI (Published version): 10.1017/aog.2023.1

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...

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Published in: Annals of Glaciology
ISSN: 0260-3055 1727-5644
Published: Cambridge University Press (CUP) 2023
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa62257
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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.
Keywords: Glacier geophysics; Glacier monitoring; Sea-ice geophysics; Seismology
College: Faculty of Science and Engineering
Funders: G.A.J. is funded through the by the Sêr Cymru II Program in Low Carbon Energy and the Environ192 ment (European Regional Development Fund and Welsh European Funding Office; Project number 80761-193 SU-SU093). A.M.G.F. is grateful to support from NERC grant NE/N011791/1. M.S. thanks SANIMS 194 (RTI2018-095594-B-I00). This project has received funding from the European Research Council (ERC) un195 der the European Union’s Horizon 2020 research and innovation program (grant agreement No 101001601).
Issue: 87-89
Start Page: 3
End Page: 7