摘要
海洋磁场测量是海洋科学观测、海底资源勘探、国防安全等领域的基本手段之一。研究海浪等海水运动的磁场噪声机理、预测模型及抑制方法对于提高海洋磁测精度具有重要的意义。该文在分析一阶Stokes波浪运动方程的基础上,提出一种改进型的海浪磁场模型,并推导出深海和浅海条件下的简化公式。为了验证模型的有效性,在2015年第15号台风"天鹅"过境期间,对我国南海某海域的海洋环境磁场进行了观测,并将该文模型和经典的Weaver模型分别与测试结果进行了对比。结果表明,该文提出的改进型模型能够更加准确地预测海浪磁场大小,预测精度比Weaver模型提高了近一个量级,可为海洋磁场测量的噪声抑制提供一种更加有效的工具。
Marine magnetic survey is one of the basic methods for oceanographic observation, seabed resource prospection and national defense security. Learning about the mechanism of the wave induced magnetic field, the prediction model and the methods of noise suppression are of great importance for improving the measurements accuracy. On the basis of analysing the first order Stokes wave motion equations, this paper proposes an improved model of the ocean wave induced magnetic field, together with simplified formulas for the deep and shallow water conditions. In order to verify the validity of the model, an observation was done in the South China Sea in 2015. By comparing the proposed model with the classic Weaver＇s model and the test results, it is shown that the proposed modified model can make an accurate prediction which is nearly an order of magnitude higher than Weaver＇s model on the ocean wave induced magnetic field. This makes the proposed model a more effective tool of noise suppression for Marine magnetic field measurement.
出处
《电子与信息学报》
EI
CSCD
北大核心
2017年第8期2007-2013,共7页
Journal of Electronics & Information Technology
基金
国家深度资源勘探的关键设备和技术研究(ZDYZ2012-1-03)~~
