Corotating magnetospheric convection
Corotating magnetospheric convection
复制标题
共转磁层对流
DOI：
10.1029/ja086ia11p09020
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发表时间：
1981
影响因子：
--
通讯作者：
L. Maher
中科院分区：
文献类型：
--
作者：
T. Hill;A. Dessler;L. Maher
磁异常模型预测的木卫一等离子体环的纵向不对称性和地球上的光学天文学观测结果一样，为木星磁层中的共转对流系统提供了一种驱动机制。在这里，我们推导出一些定性的性质，这个对流系统的一般方程，管理一个稳定的状态共转对流系统（虽然我们预计，随时间变化的影响可能也必须包括一个完整的描述木星对流）。共转对流系统似乎能够提供主导的径向运输机制（与时间尺度可能短到几个旋转周期）和主导机制提取能量从木星的旋转（以约10/sup 15/ W的速度）驱动各种各样的磁层现象。类似的共转对流系统也可能发生在其他以旋转为主的磁层中，例如土星和土星的磁层。
The longitudinal asymmetry of the Io plasma torus, as predicted by the magnetic-anomaly model and observed by Earth-based optical astronomy, provides a driving mechanism for a corotating convection system in Jupiter's magnetosphere. Here we deduce some qualitative properties of this convection system from the general equations that govern a steady state corotating convection system (although we expect that time-dependent effects may also have to be included for a complete description of Jovian convection). The corotating convection system appears capable of providing both the dominant radial transport mechanism (with a time scale possibly as short as a few rotation periods) and the dominant mechanism for extracting energy from Jupiter's rotation (at a rate approx.10/sup 15/ W) for driving a wide variety of magnetospheric phenomena. A similar corotating convection system may occur in other rotation-dominated magnetospheres, for example, those of pulsars and Saturn.