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DOI | 10.1029/2020GL092208 |
Diffuse auroral electron scattering by electrostatic electron cyclotron harmonic waves in the dayside magnetosphere | |
Yuequn Lou; Xing Cao; Binbin Ni; Weichao Tu; Xudong Gu; Song Fu; Zheng Xiang; Xin Ma | |
2021-02-24 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2021 |
英文摘要 | Although electrostatic electron cyclotron harmonic (ECH) waves are frequently observed in the dayside magnetosphere, their effects on the formation of dayside diffuse aurora remain poorly understood. In this study, we quantitatively evaluate the efficiency of dayside ECH wave scattering in producing the electron diffuse aurora precipitation during a typical ECH wave event by calculating the quasi‐linear bounce‐averaged scattering rates. We find that dayside ECH waves can efficiently pitch angle scatter diffuse auroral electrons on timescales of a few hours to ∼1 day over a broad range of electron energy and equatorial pitch angle αeq, i.e., from ∼300 eV to 10 keV with αeq from the loss cone to 45°. Especially for ∼300 eV to 2 keV electrons, the scattering rates can even approach the strong diffusion limit, resulting in an almost fully filled loss cone. Our results confirm the significant role of ECH waves in driving the dayside diffuse aurora. 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/315851 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | Yuequn Lou,Xing Cao,Binbin Ni,et al. Diffuse auroral electron scattering by electrostatic electron cyclotron harmonic waves in the dayside magnetosphere[J]. Geophysical Research Letters,2021. |
APA | Yuequn Lou.,Xing Cao.,Binbin Ni.,Weichao Tu.,Xudong Gu.,...&Xin Ma.(2021).Diffuse auroral electron scattering by electrostatic electron cyclotron harmonic waves in the dayside magnetosphere.Geophysical Research Letters. |
MLA | Yuequn Lou,et al."Diffuse auroral electron scattering by electrostatic electron cyclotron harmonic waves in the dayside magnetosphere".Geophysical Research Letters (2021). |
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