Ross ice shelf vibrations
Bromirski, Peter D.
Stephen, Ralph A.
Bolmer, S. Thompson
Wiens, Douglas A.
Aster, Richard C.
Nyblade, Andrew A.
MetadataShow full item record
KeywordOcean wave-ice shelf interactions; Infragravity waves; Dispersed gravity wave arrivals; Polarization analysis; Rayleigh-Lamb waves; Flexural waves
Broadband seismic stations were deployed across the Ross Ice Shelf (RIS) in November 2014 to study ocean gravity wave-induced vibrations. Initial data from three stations 100 km from the RIS front and within 10 km of each other show both dispersed infragravity (IG) wave and ocean swell-generated signals resulting from waves that originate in the North Pacific. Spectral levels from 0.001 to 10 Hz have the highest accelerations in the IG band (0.0025–0.03 Hz). Polarization analyses indicate complex frequency-dependent particle motions, with energy in several frequency bands having distinctly different propagation characteristics. The dominant IG band signals exhibit predominantly horizontal propagation from the north. Particle motion analyses indicate retrograde elliptical particle motions in the IG band, consistent with these signals propagating as Rayleigh-Lamb (flexural) waves in the ice shelf/water cavity system that are excited by ocean wave interactions nearer the shelf front.
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 42 (2015): 7589–7597, doi:10.1002/2015GL065284.
Suggested CitationGeophysical Research Letters 42 (2015): 7589–7597
Showing items related by title, author, creator and subject.
Ice shelf structure derived from dispersion curve analysis of ambient seismic noise, Ross Ice Shelf, Antarctica Diez, Anja; Bromirski, Peter D.; Gerstoft, Peter; Stephen, Ralph A.; Anthony, Robert E.; Aster, Richard C.; Cai, Chen; Nyblade, Andrew A.; Wiens, Douglas A. (Oxford University Press, 2016-02-16)An L-configured, three-component short period seismic array was deployed on the Ross Ice Shelf, Antarctica during November 2014. Polarization analysis of ambient noise data from these stations shows linearly polarized waves ...
Predicting seabed burial of cylinders by wave-induced scour : application to the sandy inner shelf off Florida and Massachusetts Trembanis, Arthur C.; Friedrichs, Carl T.; Richardson, Michael D.; Traykovski, Peter A.; Howd, Peter A.; Elmore, Paul A.; Wever, Thomas F. (IEEE, 2007-01)A simple parameterized model for wave-induced burial of mine-like cylinders as a function of grain-size, time-varying, wave orbital velocity and mine diameter was implemented and assessed against results from inert ...
Near-surface environmentally forced changes in the Ross Ice Shelf observed with ambient seismic noise Chaput, Julien; Aster, Richard C.; McGrath, Daniel; Baker, Michael G.; Anthony, Robert E.; Gerstoft, Peter; Bromirski, Peter D.; Nyblade, Andrew A.; Stephen, Ralph A.; Wiens, Douglas A.; Das, Sarah B.; Stevens, Laura A. (John Wiley & Sons, 2018-10-16)Continuous seismic observations across the Ross Ice Shelf reveal ubiquitous ambient resonances at frequencies >5 Hz. These firn‐trapped surface wave signals arise through wind and snow bedform interactions coupled with ...