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DOI | 10.1029/2020GL092153 |
Configuration of the Earth’s magnetotail current sheet | |
Anton Artemyev; San Lu; Mostafa El‐; Alaoui; Yu Lin; Vassilis Angelopoulos; Xiao‐; Jia Zhang; Andrei Runov; Ivan Vasko; Lev Zelenyi; Christopher Russell | |
2021-03-10 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | The spatial scale and intensity of Earth’s magnetotail current sheet determine the magnetotail configuration, which is critical to one of the most energetically powerful phenomena in the Earth’s magnetosphere, substorms. In the absence of statistical information about plasma currents, theories of the magnetotail current sheets were mostly based on the isotropic stress balance. Such models suggest that thin current sheets cannot be long and should have strong plasma pressure gradients along the magnetotail. Using MMS and THEMIS observations and global simulations, we explore realistic configuration of the magnetotail current sheet. We find that the magnetotail current sheet is thinner than expected from theories that assume isotropic stress balance. Observed plasma pressure gradients in thin current sheets are insufficiently strong (i.e., current sheets are too long) to balance the magnetic field line tension force. Therefore, pressure anisotropy is essential in the configuration of thin current sheets where instability precedes substorm onset. This article is protected by copyright. All rights reserved. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/318550 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Anton Artemyev,San Lu,Mostafa El‐,等. Configuration of the Earth’s magnetotail current sheet[J]. Geophysical Research Letters,2021. |
APA | Anton Artemyev.,San Lu.,Mostafa El‐.,Alaoui.,Yu Lin.,...&Christopher Russell.(2021).Configuration of the Earth’s magnetotail current sheet.Geophysical Research Letters. |
MLA | Anton Artemyev,et al."Configuration of the Earth’s magnetotail current sheet".Geophysical Research Letters (2021). |
条目包含的文件 | 条目无相关文件。 |
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