AEYFI 05实验‘温度-声简正波传播时间'起伏特性研究

处理分析AEYFI 05声学实验温度链和声传播数据,研究温度时-空间统计、相关特性及其声传播时间统计特性。分析表明1号声简正波的传播时间起伏的功率谱与温跃层附近温度时间序列的功率谱存在明显的相似：在高频区域f〉30cpd呈ω-β（β≌1.7-1.8）的幂次衰减,包含相干结构。应用简正波传播时间与声速起伏的对应关系式,给出了上述对应关系的理论解释。

Research to the fluctuation of tempreture-normal mode travel time in AEYFI 05

The data acquired from moored sensors and shipboard hydrographic instruments of AEYFI 05（Acoustics Experiment of Yellow Sea Oceanic Front and Internal Waves） are processed.Both of the spa-tial temporal statistical and correlative characteristics to temperature are analyzed,and the sound travel-time statistical character is calculated too.Results indicate that the frequency spectrum of No.1 Normal Mode travel-time fluctuation is qualitatively similar to the one of temperature time sequence near thermocline,and two spectra present ω-β（β≌1.7-1.8） attenuation for f〉30cpd,and both include coherent-structures.The mathi-matic relationships between time and sound-speed fluctuation of Normal Mode propagation are given by the Normal Mode perturbation theory which is used to explain the qualitatively relation between two spectra.