Analysis of Current Estimation along Sound-Channel Axis in Central Pacific
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概要
- 論文の詳細を見る
An ocean acoustic tomography experiment was carried out throughout the year 2000 with seven 200 Hz transceivers allocated in the area of $1100\times 1500$ km2 in the central equatorial Pacific Ocean. The arrival time of the signal propagating near a sound-channel axis was selected and the effect of distance fluctuation was eliminated by excluding the elapsed time to travel differential length from the mean ray length of the transceivers calculated on the basis of ray theory. The zonal current velocity of a pair of transceivers and meridional current velocity were estimated from the reciprocal arrival time of the transceivers, which was recorded using hydrophones without any handling. Both the zonal and meridional mean velocities at the sound-channel axis were lower than 20 cm/s. To examine the proper of the obtained results, the obtained zonal current was compared with that of calculated by another method and with the acoustic Doppler current profiler (ADCP) data obtained at the tropical atmosphere ocean (TAO) buoy.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2007-07-30
著者
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Nakamura Toshiaki
Department Of Anesthesia Nagasaki Rosai Hospital
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Mizutani Koichi
Institute Of Applied Physics University Of Tsukuba
-
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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