The magnetosphere-ionosphere system from the perspective of plasma circulation : A tutorial
The magnetosphere-ionosphere system from the perspective of plasma circulation : A tutorial
复制标题
从等离子体循环的角度看磁层-电离层系统：教程
DOI：
10.1016/j.jastp.2006.08.011
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发表时间：
2007
影响因子：
1.9
通讯作者：
W. Lotko
中科院分区：
文献类型：
--
作者：
W. Lotko
本教程审查审查的作用，O+在磁层电离层耦合的动力学。O+等离子体元素的生命周期被认为是从中纬度到高纬度的电离层循环。对流等离子体元素进入外流的能量化和转移涉及在尖点和等离子体边界层的低空底部和向下流动的“压力锅”中的Alfvénic湍流。观测证据表明，O+占主导地位的等离子体和环电流在极端风暴间隔进行审查。富氧等离子体对太阳风磁层电离层耦合的影响被认为是在微观和全球尺度。观测、理论和模拟结果的综合表明，磁层中O+的存在是维持昼侧和夜侧磁合并之间平衡的破坏性和调节剂。
This tutorial review examines the role of O+in the dynamics of magnetosphere–ionosphere coupling. The life cycle of an O+plasma element is considered as it circulates from the mid- to high-latitude ionosphere. Energization and diversion of the convecting plasma element into outflows involves Alfvénic turbulence at the low-altitude base of the cusp and plasmasheet boundary layer and in downward-current “pressure cookers.” Observational evidence indicating that O+dominates the plasmasheet and ring current during extreme storm intervals is reviewed. The impacts of an O+-enriched plasma on solar wind–magnetosphere–ionosphere coupling are considered at both the micro and global scales. A synthesis of results from observation, theory and simulations suggests that the presence of O+in the magnetosphere is both a disruptive and a moderating agent in maintaining the balance between dayside and nightside magnetic merging.