气候变化领域集成服务门户(CCPortal): Universal Scaling of Thin Current Sheets

CCPortal

DOI	10.1029/2020GL088422
	Universal Scaling of Thin Current Sheets
	Zelenyi L.M.; Malova H.V.; Grigorenko E.E.; Popov V.Y.; Dubinin E.M.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:14
英文摘要	Thin current sheets (TCSs) with thicknesses about ion Larmor radii are widespread in space. It is important to describe their equilibrium structure allowing them to store and then explosively release the accumulated free energy. When ions are moving along quasi-adiabatic trajectories while magnetized electrons follow guiding center drift orbits, TCSs can be described within the framework of a hybrid approach. The thickness of the embedded electron sheet remains uncertain because of the scale-free character of electron motion. In this work, we propose a novel analytical model of the multilayer TCS that provides a universal expression describing the inner (embedded) electron sheet in dependence of TCS characteristics. An unusual property of the embedded electron layer revealed in this analysis is the nonlinear profile of the magnetic field in the inner layer: B(z) ~ z1/3, which conforms excellently with MAVEN observations of 43 TCSs in the Martian magnetotail. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Free energy; Equilibrium structures; Guiding centers; Hybrid approach; Magnetized electrons; Nonlinear profiles; Thin current sheet; Universal expressions; Universal scaling; Electrons; adiabatic process; analytical method; electron; equilibrium; Gibbs free energy; magnetic field; Martian atmosphere; nonlinearity; observational method
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/170098
作者单位	Space Research Institute of the Russian Academy of Sciences, Moscow, Russian Federation; Department of Space Physics, Moscow Institute of Physics and Technology, Moscow, Russian Federation; Scobeltsyn Institute of Nuclear Physics of Lomonosov Moscow State University, Moscow, Russian Federation; Faculty of Physics, National Research University Higher School of Economics, Moscow, Russian Federation; Physical Faculty of Moscow State University, Moscow, Russian Federation; Max Planck Institute for Solar System Research, Gӧttingen, Germany
推荐引用方式 GB/T 7714	Zelenyi L.M.,Malova H.V.,Grigorenko E.E.,et al. Universal Scaling of Thin Current Sheets[J],2020,47(14).
APA	Zelenyi L.M.,Malova H.V.,Grigorenko E.E.,Popov V.Y.,&Dubinin E.M..(2020).Universal Scaling of Thin Current Sheets.Geophysical Research Letters,47(14).
MLA	Zelenyi L.M.,et al."Universal Scaling of Thin Current Sheets".Geophysical Research Letters 47.14(2020).