Acoustic Fluctuation Caused by Nonlinear Internal Waves in AEYFI2005
Nonlinear internal waves(IWs) passing through vertical line array (VLA) and induced acoustic fluctuation were observed in AEYFI2005 (Acoustic Experiment of Yellow Sea Oceanic Front and Internal Wave in 2005). In this paper, we present analysis of the intensity fluctuation of wideband acoustic signal recorded by VLA where 37 km away from source and the antinode fluctuation of the depth function of 1st normal mode induced by NIWs. Although there exist no significant mode coupling, however, intensity variation of signal amplitude larger than 7dB is observed. Simultaneously, it is found that the intensity fluctuation from experiment is well agreement with the fluctuation of thermocline measured by thermistor chain. There is high correlation between the intensity fluctuation from experiment and the simulated result by KRAKEN. It turns out that these can be interpreted as acoustic fluctuation due to the variation of local depth function induced by IWs.
Haozhong Wang Ning Wang Dazhi Gao Haiqing Zhang
Department of Ocean Technology,Ocean University of China.238 Songling Road,Qingdao,266100,P.R.China
国际会议
The 10th Western Pacific Acoustics Conference(第十届西太平洋声学会议WESPAC X)
北京
英文
1-5
2009-09-21（万方平台首次上网日期，不代表论文的发表时间）