Developments of Geodynamo Theory

最近由Kuang和Bloxham进行的地球动力学模拟，以及早期由Glatzmaier和P.I Roberts进行的模拟，都与观测到的地磁场特征（包括极性反转）非常吻合。他们也提供了新的目标，如Glatzmaier和Roberts的预测，即内核相对于地幔应该向东旋转，这一预测随后得到了两个独立地震学调查的支持。在这笔拨款中，PI和合作者Glatzmaier计划通过减少粘性扩散和包括核心湍流来进一步增加模型的真实感，并提高计算技术的数值分辨率和准确性。他们还将研究过去地质时代的地球发电机，并将他们的研究扩展到木星伽利略卫星上运行的发电机。＊＊＊

9725627 Roberts The recent simulations of the geodynamo by Kuang and Bloxham, and earlier by Glatzmaier and the P.I., Roberts, have been in good agreement with the observed characteristics of the observed geomagnetic field, including polarity reversals. They have also provided new targets, as with the prediction by Glatzmaier and Roberts that the inner core should rotate eastwards relative to the mantle, which was subsequently supported by two independent seismological investigations. In this grant, the PI and collaborator Glatzmaier plan to add further realism to the model by reducing viscous diffusion and by including core turbulence, and to improve the numerical resolution and accuracy of the computational techniques. They shall also investigate the geodynamo in past geological epochs, and extend their studies to dynamos operating in Jupiter's Galilean satellites. ***