基于LLC4320环境数据的吕宋海峡声学特征分析

Acoustic Characterization of the Luzon Strait Based on LLC4320 Environmental Data

摘要:

声波是水下信息获取和目标探测的主要手段，其在海洋波导中的传播特性及声场分布与海洋动力环境紧密相关。基于 LLC4320 再分析数据，针对吕宋海峡及其周边海域，开展了局部环境场特征和声学特征分析， 评价了高分辨率数据对于声学特征研究的适用性。首先，通过分析该区域 1 月温盐场的时间和空间变化特征，结合跃层的空间分布和时间变化，研究了吕宋海峡区域的动力环境特征；其次，开展了声传播规律的研究，并评价了声速、声传播特征等与温盐场的相关性，可为高分辨率的海洋数值模拟在海洋声学特征研究中的应用提供参考。

Abstract:

Sound waves are the main means of underwater information acquisition and target detection，and their propagation characteristics and sound field distribution in ocean waveguides are closely related to the marine dynamic environment. Based on LLC4320 reanalysis data，an analysis of local environmental field characteristics and acoustic features for the Luzon Strait and its surrounding waters is conducted，and the applicability of high-resolution data for acoustic feature research is evaluated. Firstly，by analyzing the temporal and spatial changes of the temperature and salinity fields in the region in January，combined with the spatial distribution and temporal changes of the thermocline，the dynamic environmental characteristics of the Luzon Strait region is studied. Furthermore，research on the laws of sound propagation is conducted，and the correlation between sound velocity， sound propagation characteristics，and temperature and salinity fields is evaluated，which can provide references for the application of high-resolution ocean numerical simulation in the study of ocean acoustic features.