津軽暖水渦と親潮冷水塊の境界の領域における双方向音響伝搬の比較

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タイトル別名
  • Comparison of Bi-Directional Sound Propagation in a Current Rip Region between Tsugaru Warm Eddy and Oyashio Cold Water Mass
  • ツガルダンスイウズ ト オヤシオ ヒヤミズカイ ノ キョウカイ ノ リョウイキ ニ オケル ソウホウコウ オンキョウ デンパン ノ ヒカク

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<p>East of the Sanriku coast, there are three water masses, namely Tsugaru Warm current (TuWE), Kurisio extension, and Oyashio cold current (OyCWM). A current rip is generated in the region by which the warm water mass and the cold water mass are bounded. Sound propagation is influenced by the current rip region. In this study, bi-directional propagation along 41°N off the Sanriku coast is investigated. As a result, when the receiver was at a shallow depth with the sound source approaching from OyCWM to TuWE, the transmission loss (TL) is large until it approached the receiver near the shallow source. The combination of a shallow source and a deep receiver has a similar result. When the receiver comes close to the source, the TL decreases greatly because of the correspondence between the receiver position and the position of the bottom reflection. When the receiver is approached to the sound source in OyCWM from TuWE, the TL decreases as the receiver depth increases. Because the sound channel (SC) propagation predominates in OyCWM, the receiver depth can reduce the TL near the SC axis.</p>

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  • 海洋音響学会誌

    海洋音響学会誌 43 (2), 53-70, 2016

    特定非営利活動法人 海洋音響学会

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