Numerical simulations show that convection in the mantle shapes the long-term structure of Earth’s magnetic field. The mantle influences the magnetic field by imposing a pattern of cooling that controls the dynamics of fluid flow at the top of the outer core.

中文翻译：

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地幔对地球磁场长期行为的影响

数值模拟表明，地幔中的对流塑造了地球磁场的长期结构。地幔通过施加一种控制外核顶部流体流动动力学的冷却模式来影响磁场。