동해에서 저주파 음파전파에 대한 Warm Eddy의 효과

Title
동해에서 저주파 음파전파에 대한 Warm Eddy의 효과
Alternative Title
Effect of warm eddy on low-frequency sound propagation in the East/Japan Sea
Author(s)
김봉채; 변상경; 최복경; 김병남
KIOST Author(s)
Choi, Bok Kyoung(최복경)Kim, Byoung Nam(김병남)
Publication Year
2009-06-21
Abstract
It has been known that sound waves in the sea generally propagate under theinfluence of sea surface wave, water depth, sound speed profile, sea floor sediment, etc. In particular, an abrupt change of the sound speed profile with depth in an eddy can greatly affect the sound propagation. Many studies on the sound propagation through eddy and oceanic front have been done in the Gulf Stream, the East Australian Current, the Western Greenland Sea, etc. Eddies are frequently generated at the polar front of the East/Japan Sea near the Korean Peninsula. A warm eddy with diameter of about 200 km is often observedand sound speed profile is frequently affected within about 300 m of water depth at the centre by the eddy in the East/Japan Sea. This sound speed variation can affect long range propagation of sound wave. The characteristics of the low-frequency sound propagation across the observed eddy are investigated by a sound propagation model. As a result, it is ascertained that the low-frequency sound propagation is affected by the warm eddy and thephenomena are dominated in the upper ocean. And the low-frequency sound propagation from the eddy centre to the eddy edge is more affected by the eddy in comparison with the sound propagation from the eddy edge to the eddy centre.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/29410
Bibliographic Citation
Proceedings of the 3rd International Conference & Exhibition on \\\"Underwater Acoustic Measurements: Technologies & Results\\\", pp.631 - 638, 2009
Publisher
Foundation for Research & Technology
Type
Conference
Language
English
Publisher
Foundation for Research & Technology
Related Researcher
Research Interests

Underwater Acoustics,Bubble Acoustics,Marine Defense & Safety,수중음향,기포음향,해양방위·안전

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