Matched-field inversion of sound speed profile in shallow water using a parallel genetic algorithm  

作　　者：余炎欣 李整林 何利 

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

出　　处：《Chinese Journal of Oceanology and Limnology》2010年第5期1080-1085,共6页中国海洋湖沼学报（英文版）

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

摘　　要：A sound speed profile plays an important role in shallow water sound propagation.Concurrent with in-situ measurements,many inversion methods,such as matched-field inversion,have been put forward to invert the sound speed profile from acoustic signals.However,the time cost of matched-field inversion may be very high in replica field calculations.We studied the feasibility and robustness of an acoustic tomography scheme with matched-field processing in shallow water,and described the sound speed profile by empirical orthogonal functions.We analyzed the acoustic signals from a vertical line array in ASIAEX2001 in the East China Sea to invert sound speed profiles with estimated empirical orthogonal functions and a parallel genetic algorithm to speed up the inversion.The results show that the inverted sound speed profiles are in good agreement with conductivity-temperature-depth measurements.Moreover,a posteriori probability analysis is carried out to verify the inversion results.A sound speed profile plays an important role in shallow water sound propagation. Concurrent with in-situ measurements, many inversion methods, such as matched-field inversion, have been put forward to invert the sound speed profile from acoustic signals. However, the time cost of matched-field inversion may be very high in replica field calculations. We studied the feasibility and robustness of an acoustic tomography scheme with matched-field processing in shallow water, and described the sound speed profile by empirical orthogonal functions. We analyzed the acoustic signals from a vertical line array in ASIAEX2001 in the East China Sea to invert sound speed profiles with estimated empirical orthogonal functions and a parallel genetic algorithm to speed up the inversion. The results show that the inverted sound speed profiles are in good agreement with conductivity-temperature-depth measurements. Moreover, a posteriori probability analysis is carried out to verify the inversion results.

关 键 词：matched-field processing sound speed profile parallel genetic algorithm 

分 类 号：P733.2[天文地球—物理海洋学] O242.23[天文地球—海洋科学]