气候变化领域集成服务门户(CCPortal): A New Approach to Constructing Models of Electron Diffusion by EMIC Waves in the Radiation Belts

CCPortal

DOI	10.1029/2020GL088976
	A New Approach to Constructing Models of Electron Diffusion by EMIC Waves in the Radiation Belts
	Ross J.P.J.; Glauert S.A.; Horne R.B.; Watt C.E.; Meredith N.P.; Woodfield E.E.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	Electromagnetic ion cyclotron (EMIC) waves play an important role in relativistic electron losses in the radiation belts through diffusion via resonant wave-particle interactions. We present a new approach for calculating bounce and drift-averaged EMIC electron diffusion coefficients. We calculate bounce-averaged diffusion coefficients, using quasi-linear theory, for each individual Combined Release and Radiation Effects Satellite (CRRES) EMIC wave observation using fitted wave properties, the plasma density and the background magnetic field. These calculations are then combined into bounce-averaged diffusion coefficients. The resulting coefficients therefore capture the combined effects of individual spectra and plasma properties as opposed to previous approaches that use average spectral and plasma properties, resulting in diffusion over a wider range of energies and pitch angles. These calculations, and their role in radiation belt simulations, are then compared against existing diffusion models. The new diffusion coefficients are found to significantly improve the agreement between the calculated decay of relativistic electrons and Van Allen Probes data. ©2020. The Authors.
英文关键词	Electrons; Magnetic field effects; Plasma density; Plasma devices; Radiation belts; Radiation effects; Combined effect; Constructing models; Diffusion model; Electron diffusion; Electron diffusion coefficient; Plasma properties; Quasilinear theory; Relativistic electron; Diffusion; diffusion; electromagnetic method; electromagnetic radiation; electron; magnetic field; plasma; probe
语种	英语
来源期刊	Geophysical Research Letters
来源机构	英国自然环境研究理事会
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169603
作者单位	British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom; Department of Mathematics, Physics and Electrical Engineering, Northumbria University, Newcastle-upon-Tyne, United Kingdom
推荐引用方式 GB/T 7714	Ross J.P.J.,Glauert S.A.,Horne R.B.,et al. A New Approach to Constructing Models of Electron Diffusion by EMIC Waves in the Radiation Belts[J]. 英国自然环境研究理事会,2020,47(20).
APA	Ross J.P.J.,Glauert S.A.,Horne R.B.,Watt C.E.,Meredith N.P.,&Woodfield E.E..(2020).A New Approach to Constructing Models of Electron Diffusion by EMIC Waves in the Radiation Belts.Geophysical Research Letters,47(20).
MLA	Ross J.P.J.,et al."A New Approach to Constructing Models of Electron Diffusion by EMIC Waves in the Radiation Belts".Geophysical Research Letters 47.20(2020).