Comprehensive Study of Inversion Methods for Sound Speed Profiles in the South China Sea
Comprehensive Study of Inversion Methods for Sound Speed Profiles in the South China Sea
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南海声速剖面反演方法综合研究
DOI：
10.1007/s11802-022-5001-7
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发表时间：
2022-11
影响因子：
1.6
通讯作者：
Cheng Chen
中科院分区：
文献类型：
--
作者：
Jiemeihui Li;Yang Shi;Yixin Yang;Cheng Chen
传统的水声仪器声速剖面获取方法精度高，但费时费力。为了克服这个问题，在过去的几十年中已经开发了一些反演方法。在这项研究中，两个反演方法-声学反演方法（AIM）和卫星观测重建方法（SOR）-的全面比较。对于AIM，首先用经验正交函数（Empirical Orthogonal Function，ERF）对声速剖面进行参数化，然后利用模拟退火算法对接收信号和仿真信号的互相关函数进行优化。对于SOR，遥感数据用于构建声速剖面。在南海东北部海域进行了实验，对这两种方法进行了验证。这两种方法都可以快速、廉价地获得声速剖面。与由电导率-温度-深度（CTD）仪器获得的声速剖面相比，AIM的均方根误差（RMSE）为0.55 m s-1，SOR的均方根误差为1.71 m s-1。很明显，AIM提供了比SOR更好的反演性能。AIM的另一个主要优点是该方法对反演深度没有限制。对反演声速剖面的声传播仿真结果表明，AIM和CTD的传播损失是一致的，SOR的传播损失受声速反演误差和反演深度的影响。但SOR在反演覆盖方面有其独特的优势。所有这些优点使AIM在实践中特别有价值。
Traditional acquisition method of sound speed profiles using hydro-acoustic instruments is accurate but time-consuming and costly. To overcome this problem, some inversion methods have been developed over the last few decades. In this study, a comprehensive comparison of two inversion methods — the acoustic inversion method (AIM) and the satellite observation reconstruction method (SOR) — is presented. For AIM, the sound speed profile is first parameterized by the empirical orthogonal function (EOF) and the optimal parameters are searched by simulated annealing algorithm with respect to the cross-correlation function of the receiving signal and the simulation signal. For SOR, remotely sensed data are used to construct sound speed profiles. An experiment was conducted in the northeast of the South China Sea to verify the two methods. Both methods can obtain sound speed profiles quickly and cheaply. Compared with the sound speed profiles obtained by a conductivity-temperature-depth (CTD) instrument, the root-mean-square-error (RMSE) of AIM is 0.55 m s−1and that of SOR is 1.71 m s−1. It is clear that AIM provides better inversion performance than SOR. Another primary benefit of AIM is that this method has no limitation to the inversion depth. The simulation results of sound propagation in regard to the inversed sound speed profiles show that the transmission losses of AIM and CTD are consistent and that of SOR is adversely affected by the inversion error of the sound speed and the inversion depth. But SOR has particular advantages in the inversion coverage. Together, all of these advantages make the AIM particularly valuable in practice.
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影响因子：
2.2
作者：
Hai-Tien Lee;R. Ellingson
通讯作者：
Hai-Tien Lee;R. Ellingson
影响因子：
2.4
作者：
Michael J. Bianco;Haiqiang Niu;P. Gerstoft
通讯作者：
Michael J. Bianco;Haiqiang Niu;P. Gerstoft
影响因子：
1.6
作者：
A. Charantonis;P. Testor;L. Mortier;F. D’Ortenzio;S. Thiria
通讯作者：
A. Charantonis;P. Testor;L. Mortier;F. D’Ortenzio;S. Thiria
DOI：
--
发表时间：
2013
期刊：
Journal of Tropical Oceanography
影响因子：
--
作者：
Mao Qing-we
通讯作者：
Mao Qing-we
影响因子：
2.4
作者：
R. L. Culver;L. Sibul;D. Bradley
通讯作者：
R. L. Culver;L. Sibul;D. Bradley