Directionality of the ambient noise field in an Arctic, glacial bay.
The directionality of ambient noise in an Arctic tidewater glacier bay was measured using two horizontally spaced, broadband hydrophones. Segments of noise were divided into two frequency bands and analyzed for arrival angle. These data show that different classes of source radiate noise in distinct spectral bands and are spatially diverse. A previously unidentified source, the interaction of surface gravity waves with underside of ice ledges at the periphery of icebergs, is described. The generation of noise by ice-wave interaction suggests that surface waves should be measured if ambient noise is to be used to monitor ice dynamics in glacial fjords.
Scripps Institution of Oceanography, University of California-San Diego, San Diego, California 92093-0206 gdeane@ucsd.edu.
Grant B
GB
Deane
Institute of Geophysics, Polish Academy of Sciences, Warsaw, Poland oglowacki@igf.edu.pl.
Oskar
O
Glowacki
Institute of Oceanography, University of Gdansk, Gdansk, Poland j.tegowski@ug.edu.pl.
Jaroslaw
J
Tegowski
Institute of Geophysics, Polish Academy of Sciences, Warsaw, Poland mmosk@igf.edu.pl.
Mateusz
M
Moskalik
University of Bath, Bath, United Kingdom pyspb@bath.ac.uk.
Philippe
P
Blondel