A mesoscale eddy is detected and tracked in the western North Pacific region. Within the life cycle of the cyclonic eddies, the intensities of eddies make a difference. Satellite images indicate the oceanic eddy keeps westward-moving until it disappears. Oceanographic and acoustic characteristics of the eddy are studied. The acoustic energy distribution results from the different intensity of both modelled eddy and measured eddy are calculated. With sound propagation through the cyclonic eddy and anticyclonic eddy, the position of convergence zone moves away from and towards the acoustic source compared with the sound propagation through background hydrography. The coupling coefficient of different orders of normal modes changes significantly. The closer to the centre of the eddy, the stronger the coupling coefficient.

中文翻译：

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中尺度涡流对声音传播特性的影响

在西北太平洋地区检测到并跟踪了中尺度涡流。在气旋涡旋的生命周期内，涡旋的强度会有所不同。卫星图像显示，海洋涡流一直向西移动，直到消失。研究了涡流的海洋学和声学特性。计算模拟涡流和实测涡流强度不同的声能分布结果。通过气旋涡旋和反气旋涡旋的声音传播，与通过背景水文传播的声音相比，会聚带的位置远离和靠近声源。不同阶常模的耦合系数变化显着。越靠近涡流中心，耦合系数越强。