Effects of Warm Eddy on Long-range Sound Propagation in the East Sea

Abstract

It is well known that warm eddy is frequently developed through the year in the East Sea. The warm eddy may affect sound propagation due to changes of sound velocity structures in the sea water. To verify the effects of the warm eddy for long-range sound propagation, transmission loss and performance surface, which were used mean direct signal excess range generated by sound propagation modeling using re-analyzed climatology data on March 23th in 2007 were analysed. From these analyses, we found that characteristics of sound propagation in the sea water are changed by the warm eddy, and boundaries of the warm eddy act as a barrier for long-range sound propagation. Furthermore, these disadvantages of the eddy related to sound propagation were increased when the sea bottom depth is shallow.

A Study of Performance Characteristics for Active Sonar in Korean Shallow Seawater Temperature Structures

“…수심이 깊은 대양의 환경 특성을 가지고 있는 동해에서의 소 나관련 연구는 다양하게 수행되어오고 있다. 은 동해 난수성 소용돌이가 장거리 음파전달 에 미치는 영향을 분석하였으며 [3] , Kim and Choi (2020)은 난수성 소용돌이가 수상함 운용 소나의 탐지 성능에 미치는 영향을 분석하였다 [4] . Lim et al (2010) 은 동해 수온구조에서의 선저부착형 소나 운용에 있 어서 음영구역을 최소화하는 방안에 대한 연구를 진 행하였다 [5] .…”