Simulations of a QuasiTaylor State Geomagnetic Field Including Polarity Reversals on the Earth Simulator
Simulations of a QuasiTaylor State Geomagnetic Field Including Polarity Reversals on the Earth Simulator
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DOI：
10.1126/science.1111831
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发表时间：
2005-07
期刊：
影响因子：
56.9
通讯作者：
F. Takahashi;M. Matsushima;Y. Honkura
中科院分区：
文献类型：
--
作者：
F. Takahashi;M. Matsushima;Y. Honkura
在速度最快的超级计算机之一地球模拟器上进行了高分辨率、低粘度的地球发电机模拟，其动态范围与地核相似，即处于准泰勒态。我们的发电机模型不仅在空间和时间特征上表现出地球发电机的特征，而且在动力学上也表现出特征。当高纬度的磁通量斑块向极移动并消失时，就会发生极性反转；在中低纬度，磁场反转的斑块会向极地移动。
High-resolution, low-viscosity geodynamo simulations have been carried out on the Earth Simulator, one of the fastest supercomputers, in a dynamic regime similar to that of Earth's core, that is, in a quasi–Taylor state. Our dynamo models exhibit features of the geodynamo not only in spatial and temporal characteristics but also in dynamics. Polarity reversals occurred when magnetic flux patches at high latitudes moved poleward and disappeared; patches with reversed field at low and mid-latitudes then moved poleward.