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Infrasonic estimation of surf period
Department of Oceanography, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Hawaii, Honolulu, Hawaii, USA
Hawaii Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, Hawaii, USA
Hawaii Institute of Geophysics and Planetology, School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, Honolulu, Hawaii, USA
Synchronous infrasonic, video, and wave height measurements were performed during high surf at Polihale beach, Kauai, on March 4–12, 2005. During the experiment, atmospheric sound levels in the 0.5–20 Hz frequency band were associated with large breaking ocean waves. The envelope of surf infrasound signals yields breaking wave periods comparable to those derived from nearshore sea surface elevation measurements. Our analysis confirms that individual plunging waves are partly responsible for the generation of surf infrasound. We demonstrate the potential to extract breaking wave period from a single, well sited infrasonic microphone.
Received 29 October 2005; accepted 21 December 2005; published 10 March 2006.
Citation: (2006), Infrasonic estimation of surf period, Geophys. Res. Lett., 33, L05612, doi:10.1029/2005GL025086.
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