摘要
分析处理黄海锋面和内波声学实验(AEYFI05:Acoustics Experiment of Yellow sea Oceanic Front and Internal Waves 2005)数据发现:1号声简正波传播时延起伏存在10～50 min,幅度2～10 ms的"高频相干"成分。对比简正波传播时延起伏量与接收船位置等温线起伏量发现:两者的高频起伏部分存在明显的延时对应关系。根据实验地形数据,本文给出了传播途径中的地形胁迫激发内波导致声传播时延起伏的物理假设,合理地解释了两者的高频起伏部分存在明显的延时对应关系。
The acoustic data of Acoustics Experiment of Yellow sea Oceanic Front and Internal Waves （AEYFI05） are analyzed in this paper. The acoustic travel time of 1st normal mode is extracted from the experiment data. It is found that there exist ＂coherent high frequency fluctuations＂ of around 10-50 minutes in time interval and 2-10 ms in amplitude. To interpret this observation, a qualitative model of acoustic propagation through a local exciting and propagating process of shallow water internal waves is developed. The comparison of the travel time data with the in-situ temperature string data showing maximum correlation at a delayed interval about 520 min supports this model.
出处
《声学学报》
EI
CSCD
北大核心
2008年第3期212-219,共8页
Acta Acustica
基金
海军总装备部预研项目及国家863计划项目(2006AA092114)资助
