文献类型：期刊文献

英文题名：Reconstructing Sound Speed Profile From Remote Sensing Data: Nonlinear Inversion Based on Self-Organizing Map

作者：Li, Haipeng[1];Qu, Ke[1];Zhou, Jianbo[2]

机构：[1]Guangdong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang 524088, Peoples R China;[2]Northwestern Polytech Univ, Sch Marine Sci & Technol, Xian 710072, Peoples R China

年份：2021

卷号：9

起止页码：109754

外文期刊名：IEEE ACCESS

收录：SCI-EXPANDED(收录号：WOS:000683992900001)、、EI(收录号：20213310762055)、Scopus(收录号：2-s2.0-85112165320)、WOS

基金：This work was supported in part by the National Natural Science Foundation of China under Grant 11904290, in part by the Natural Science Foundation of Guangdong Province under Grant 2014A030310256, and in part by the Program for Scienti~c Research Start-up Funds of Guangdong Ocean University under Grant R19058.

语种：英文

外文关键词：Ocean temperature; Sea surface; Remote sensing; Surface reconstruction; Surface topography; Temperature sensors; Self-organizing feature maps; Sound speed profile; empirical orthogonal function; self-organizing map; nonlinear inversion

外文摘要：By establishing a linear regression relationship between the projection coefficient of the empirical orthogonal function (EOF) of the sound speed profile (SSP) and remote sensing parameters of the sea surface, the single empirical orthogonal function regression (sEOF-r) method was used to reconstruct the underwater SSP from satellite remote sensing data. However, because the ocean is a complex dynamical system, the parameters of the surface and the subsurface did not conform to the linear regression model in strict sense. This paper proposes a self-organizing map (SOM)-based nonlinear inversion method that used satellite observations to obtain anomalies in data on the sea surface temperature and height, and combined them with the EOF coefficient from an Argo buoy to train and generate a map. The SSP was then reconstructed by obtaining the best matching neuron. The results of SSP reconstruction in the northern part of the South China Sea showed that the relationship between the parameters of the sea surface and the subsurface could be adequately expressed by the nonlinear neuronal topology. The SOM algorithm generated a smaller inversion error than linear inversion and had better robustness. It improved the average accuracy of reconstruction by 0.88 m/s and reduced the mean-squared reconstruction error to less than 1.19 m/s. It thus offered significant promise for acoustic applications.