Acoustic monitoring of the thermocline position at the Yellow sea in summer conditions
ABSTRACT WKB modal condition and waveguide invariant method are used to describe the frequency shifts of constant acoustic intensity level curves in broadband signal spectrograms measured at the Yellow sea during the summer of 2005.（AEYFI-05：Acoustics Experiment of Yellow sea Oceanic Front and Internal Waves 2005） The broadband signals (670-770 Hz) were transmitted from a fixed source and received at fixed receivers, located at 37 km range along a cross-shelf propagation track. The constant acoustic intensity level curves of the received signals indicate regular frequency shifts that can be used to predict the variation of thermocline position. Through adiabatic approximation rectified, an excellent agreement between the variation of thermocline position measured by thermistor chains and that estimated from the frequency shifts of the constant acoustic intensity levels suggests the potential of long-term acoustic monitoring of the variation of thermocline position in summer conditions.
Dazhi Gao Haozhong Wang Jinzhong Liu Ning Wang
Ocean University of China,Qingdao,266100 P.R.China Wei Fang University,Wei Fang,261061 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
1-6
2009-09-21（万方平台首次上网日期，不代表论文的发表时间）