Effects of internal waves on signal temporal correlation length in the South China Sea  

作　　者：任云 李整林 

机构地区：[1]State Key Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences [2]Graduate School,Chinese Academy of Sciences [3]Haikou Laboratory of Acoustics,Institute of Acoustics,Chinese Academy of Sciences

出　　处：《Chinese Journal of Oceanology and Limnology》2010年第5期1119-1126,共8页中国海洋湖沼学报（英文版）

基　　金：Supported by the Knowledge Innovation Program of Chinese Academy of Sciences (No.KZCX1-YW-12-02);the National Natural Science Foundation of China (Nos.10974218,10734100)

摘　　要：We simulated the temporal correlation of sound transmission using a two-dimensional advective frozen-ocean model with temperature data from a temperature sensor array on a propagation path in the South China Sea （SCS） Experiment 2009, and investigated the relationships of temporal correlation length, source-receiver range, and maximal sound speed fluctuation mainly caused by the solitary internal waves. We found that the temporal correlation length is -h2-power dependent on source-receiver range and -0.9-power dependent on maximal sound speed fluctuation. The empirical relationship is deduced from one-day environmental measurements in a limited area, needing more works and verification in the future with more acoustic data. But the relationship is useful in many applications in the area of SCS Experiment 2009.We simulated the temporal correlation of sound transmission using a two-dimensional advective frozen-ocean model with temperature data from a temperature sensor array on a propagation path in the South China Sea(SCS) Experiment 2009,and investigated the relationships of temporal correlation length,source-receiver range,and maximal sound speed fluctuation mainly caused by the solitary internal waves.We found that the temporal correlation length is-1.2-power dependent on source-receiver range and-0.9-power dependent on maximal sound speed fluctuation.The empirical relationship is deduced from one-day environmental measurements in a limited area,needing more works and verification in the future with more acoustic data.But the relationship is useful in many applications in the area of SCS Experiment 2009.

关 键 词：internal waves solitary internal waves temporal correlation length source-receiver range sound speed fluctuation 

分 类 号：P733.2[天文地球—物理海洋学]