地磁场模型及在海洋环境中的应用需求研究

Research on geomagnetic field models and its application requirement in marine environment

地磁场是地球固有的基本物理场,地磁场模型是海洋环境保障的重要信息。分析了对地磁场建模理论、现今具有代表性的主磁场模型、地壳异常模型及其他磁场模型最新研究成果,对照地磁场模型在海洋环境中的应用现状,认为现今地磁场模型的分辨率和精度等技术指标尚未能满足地磁匹配导航和水下目标探测等保障需求。提出要深化海域磁场模型应用需求论证,加强现有海域磁力测量资料的整编,积极开展海域地磁场观测的理论创新、技术创新和方法研究,研发出我国海域高精度高分辨率的地磁场模型。

Geomagnetic field is inherent physical field of the earth, meanwhile geomagnetic field model is valuable information in marine environment.First, geomagnetic field modelling theory and the progress of the latest and representative geomagnetic models including the core, lithospheric and other models are comprehensively reviewed.Then, the applications status of geomagnetic field models in marine environment are compared and analyzed.The results show that resolution and accuracy of the existing geomagnetic model can’t meet the requirements of magnetic navigation, underwater magnetic anomaly detection.We should further focus on marine magnetic model requirements demonstration, existing marine magnetic survey data reorganization, and new magnetic survey means development.High accuracy and high spatial resolution marine magnetic model in the sea area of our country should be developed.