Analysis of Tidal Effect on Reciprocal Sound Propagation in Central Pacific Ocean
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概要
- 論文の詳細を見る
Long-range-traveling sound in the ocean includes information on ocean phenomena such as changes in temperature, tide, internal wave, and vortex as travel time differences or sound pressure attenuations. In this study, time series of travel time differences between two moorings for an ocean acoustic tomography experiment in the equatorial central Pacific Ocean promoted by JAMSTEC in 2000 were compared with the calculated elevation of sea level predicted from eight major tidal constituents using the tidal model GOTIC2. While diurnal and semidiurnal tidal effects were confirmed from the water temperature changes located near the sound sources, differences in the reciprocal travel time also fluctuated in accordance with the tidal effects. Although the precision of the moorings position detection and travel time tracking from the received signals need to be improved, this analysis is the first step to reveal the dynamics of energy circulation in the sea.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2008-05-25
著者
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HACHIYA Hiroyuki
Department of Information & Image Sciences, Chiba University
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Nakamura Toshiaki
Department Of Anesthesia Nagasaki Rosai Hospital
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Mizutani Koichi
Department Of Elcetrical Engineering The National Defense Academy
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Mizutani Koichi
Department of Intelligent Interaction Technologies, Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan
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Ogasawara Hanako
Department of Earth and Ocean Sciences, National Defense Academy, Yokosuka, Kanagawa 239-8686, Japan
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Fujimori Hidetoshi
Data Integration and Analysis Group, Marine-Earth Data and Information Department, Japan Agency for Marine-Earth Science and Technology, Yokosuka, Kanagawa 237-0061, Japan
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Hachiya Hiroyuki
Department of Mechanical and Control Engineering, Graduate School of Science and Engineering, Tokyo Institute of Technology, Meguro, Tokyo 152-8550, Japan
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Ogasawara Hanako
Department of Earth and Ocean Sciences, National Defense Academy, 1-10-20 Hashirimizu, Yokosuka, Kanagawa 239-8686, Japan
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