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Detailed Reference Information |
Sugioka, H., Fukao, Y. and Hibiya, T. (2005). Submarine volcanic activity, ocean-acoustic waves and internal ocean tides. Geophysical Research Letters 32: doi: 10.1029/2005GL024001. issn: 0094-8276. |
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Submarine volcanic event often generates acoustic waves (T-waves) traveling over long distances through the low velocity channel (SOFAR) of the ocean. By a method of coherent stacking of T-waves from a submarine volcanic activity in northern Mariana, we found a significant semidiurnal variation of T-wave travel times. The amplitude of variation is an order of larger than those reported in the previous ocean sound transmission experiments. Ray-theoretical consideration for the numerically simulated ocean tides indicates that such large T-phase travel time variation is a consequence of large up-and-down movement of seawater around the axis of the SOFAR channel due to the M2 internal tide effectively converted from external tidal forcing. T-phases, a ubiquitous feature of the ocean acoustic noise field, can be used to infer internal tidal motion and the associated ocean mixing. |
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Abstract |
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Keywords
Oceanography, General, Ocean acoustics, Oceanography, Physical, Internal and inertial waves, Seismology, General or miscellaneous, Seismology, Volcano seismology |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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