海洋背景磁场模拟计算及东中国海表层磁场分布

海洋中海水的运动会切割地球磁场,生成微弱的电场,进而在海洋内部和周围空间激发感生电磁场,即约为地球磁场一万至十万分之一的微弱海洋背景磁场.文中针对海洋背景磁场的生成机制及近几十年来对海洋背景磁场的理论研究,结合世界磁场模型WMM2005,模拟计算了三种典型的海洋运动--海浪、海流、内波所产生的感应磁场,建立了海洋背景磁场的数值计算模型,并在此基础上设计开发了海洋背景磁场的模拟计算软件.最后用卫星多传感器资料驱动普林斯顿海洋动力学模式,得到的东中国海2005年海洋表层环流数据,模拟计算了东中国海海表层磁场分布,对其磁场变化与分布规律作了简要分析.

Simulation of Ocean Background Magnetic Field and it's Distribution in East China Sea

The induced electric current caused by the motion of water across the earth's magnetic field generates the ocean background magnetic field.The induced magnetic fields of the three typical ocean moving components,i.e.ocean wave,ocean current and internal wave,are introduced and summarized.An ocean background magnetic field simulation model with its software coded in C is provided and tested in which the World Magnetic Model 2005 is embedded.Meanwhile,the magnetic field distribution in East China Sea is calculated by the application of the simulation software to the circulation current data,simulated from Princeton Ocean Model(POM) driven by multi-satellites sensor data.