气候变化领域集成服务门户(CCPortal): The Role of the Dynamic Plasmapause in Outer Radiation Belt Electron Flux Enhancement

CCPortal

DOI	10.1029/2020GL086991
	The Role of the Dynamic Plasmapause in Outer Radiation Belt Electron Flux Enhancement
	Bruff M.; Jaynes A.N.; Zhao H.; Goldstein J.; Malaspina D.M.; Baker D.N.; Kanekal S.G.; Spence H.E.; Reeves G.D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:7
英文摘要	The plasmasphere is a highly dynamic toroidal region of cold, dense plasma around Earth. Plasma waves exist both inside and outside this region and can contribute to the loss and acceleration of high energy outer radiation belt electrons. Early observational studies found an apparent correlation on long time scales between the observed inner edge of the outer radiation belt and the modeled innermost plasmapause location. More recent work using high-resolution Van Allen Probes data has found a more complex relationship. For this study, we determine the standoff distance of the location of maximum electron flux of the outer belt MeV electrons from the plasmapause following rapid enhancement events. We find that the location of the outer radiation belt based on maximum electron flux is consistently outside the plasmapause, with a peak radial standoff distance of ∆L ~ 1. We discuss the implications this result has for acceleration mechanisms. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Location; Radiation belts; Acceleration mechanisms; Complex relationships; Electron flux; High resolution; MeV-Electrons; Observational study; Outer radiation belt; Stand-off distance (SoD); Electrons; atmospheric electricity; Earth; electron; flux measurement; plasma; probe; total electron content
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170477
作者单位	Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States; Department of Physics and Astronomy, University of Iowa, Iowa City, IA, United States; Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, United States; Space Science and Engineering Division, Southwest Research Institute, San Antonio, TX, United States; Department of Physics and Astronomy, University of Texas San Antonia, San Antonio, TX, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Department of Physics and Astronomy, University of New Hampshire, Durham, NH, United States; Los Alamos National Laboratory, Los Alamos, NM, United States
推荐引用方式 GB/T 7714	Bruff M.,Jaynes A.N.,Zhao H.,et al. The Role of the Dynamic Plasmapause in Outer Radiation Belt Electron Flux Enhancement[J],2020,47(7).
APA	Bruff M..,Jaynes A.N..,Zhao H..,Goldstein J..,Malaspina D.M..,...&Reeves G.D..(2020).The Role of the Dynamic Plasmapause in Outer Radiation Belt Electron Flux Enhancement.Geophysical Research Letters,47(7).
MLA	Bruff M.,et al."The Role of the Dynamic Plasmapause in Outer Radiation Belt Electron Flux Enhancement".Geophysical Research Letters 47.7(2020).