Ocean acoustic remote sensing using ambient noise: Results from the Florida Straits

Michael G Brown, O. A. Godin, X. Zang, J. S. Ball, N. A. Zabotin, L. Y. Zabotina, N. J. Williams

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Noise interferometry is the process by which approximations to acoustic Green's functions, which describe sound propagation between two locations, are estimated by cross-correlating time series of ambient noise measured at those locations. Noise-interferometry-based approximations to Green's functions can be used as the basis for a variety of inversion algorithms, thereby providing a purely passive alternative to active-source ocean acoustic remote sensing. In this paperwe give an overviewof results from noise interferometry experiments conducted in the Florida Straits at 100mdepth in December 2012, and at 600mdepth in September/October 2013. Under good conditions for noise interferometry, estimates of cross-correlation functions are shown to allow one to perform advanced phase-coherent signal processing techniques to perform waveform inversions, estimate currents by exploiting non-reciprocity, perform timereversal/ back-propagation calculations and investigate modal dispersion using time-warping techniques. Conditions which are favourable for noise interferometry are identified and discussed.

Original languageEnglish (US)
Pages (from-to)574-589
Number of pages16
JournalGeophysical Journal International
Volume206
Issue number1
DOIs
StatePublished - Jul 1 2016

Keywords

  • Interferometry
  • Wave propagation

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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    Brown, M. G., Godin, O. A., Zang, X., Ball, J. S., Zabotin, N. A., Zabotina, L. Y., & Williams, N. J. (2016). Ocean acoustic remote sensing using ambient noise: Results from the Florida Straits. Geophysical Journal International, 206(1), 574-589. https://doi.org/10.1093/gji/ggw170