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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >North-south asymmetries in cold plasma density in themagnetotail lobes: Cluster observations
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North-south asymmetries in cold plasma density in themagnetotail lobes: Cluster observations

机译：在寒冷的等离子体密度在南北不对称themagnetotail叶:集群的观察

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摘要

In this paper, we present observations of cold (0–70 eV) plasma density in the magnetotail lobes. The observations and results are based on 16 years of Cluster observation of spacecraft potential measurements converted into local plasma densities. Measurements from all four Cluster spacecraft have been used, and the survey indicates a persistent asymmetry in lobe density, with consistently higher cold plasma densities in the northern lobe. External influences, such as daily and seasonal variations in the Earth’s tilt angle, can introduce temporary north-south asymmetries through asymmetric ionization of the two hemispheres. Likewise, external drivers, such as the orientation of the interplanetary magnetic field can set up additional spatial asymmetries in outflow and lobe filling. The persistent asymmetry reported in this paper is also influenced by these external factors but is mainly caused by differences in magnetic field configuration in the Northern and Southern Hemisphere ionospheres.
机译：在本文中,我们目前的观察冷(0 - 70 eV)在磁尾等离子体密度叶。16年的集群航天器的观察潜在的测量转化为本地等离子体密度。集群航天器已经使用,调查表明一个持久不对称叶密度,与冷等离子体密度较高北方叶。每日和季节性变化在地球的倾斜角,可以引入临时南北通过不对称的电离不对称两个半球。行星际磁场的方向字段可以设置额外的空间不对称在流出和叶填充。不对称本文还报道但这些外部影响因素主要由磁场的差异造成的配置在北部和南部半球电离层。

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