海洋温度剖面最优插值及其效果分析

Optimal Interpolation for the Ocean Temperature Profileand Analysis on Efficiency

摘要:

声纳探测距离受海洋声速梯度影响很大,而温度是影响声速梯度的重要因素。为了更真实地反映海洋环境,尤其是声场分布,对海温进行同化研究就显得十分必要。文章提出了一种评估同化算法效果的方法,并分别用最优插值、反距离加权、Kriging插值3种算法对垂直温度剖面进行同化处理。仿真结果表明,最优插值算法的同化结果更接近真实数据,对温度剖面的最优插值有助于预测声纳探测距离。

Abstract:

The detection range of sonar is greatly affected by the gradient of sound speed, which is mostly determined by the temperature. It is of great significance to study the assimilation of the ocean temperature in order to truly present the environment of the ocean, especially the distribution of the sound field. In this paper, a method of the evaluation of the effects of the assimilation algorithms was proposed, and the vertical temperature profile was assimilated by the optimal interpolation, the inverse distance weighting interpolation and the Kriging interpolation respectively. The results of emulation showed that the assimilation result of the optimal interpolation was most approximate to the real data, and the optimal interpolation for the ocean temperature profile was conductive to the forecasting of the detection range of the sonar.