气候变化领域集成服务门户(CCPortal): Interplanetary Shock Impact Angles Control Magnetospheric ULF Wave Activity: Wave Amplitude; Frequency; and Power Spectra

CCPortal

DOI	10.1029/2020GL090857
	Interplanetary Shock Impact Angles Control Magnetospheric ULF Wave Activity: Wave Amplitude; Frequency; and Power Spectra
	Oliveira D.M.; Hartinger M.D.; Xu Z.; Zesta E.; Pilipenko V.A.; Giles B.L.; Silveira M.V.D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:24
英文摘要	We present the first clear observational connection between interplanetary shock impact angles and magnetospheric ultralow frequency (ULF) wave activity. We perform a comparative study of two solar wind shocks with relatively similar strengths, but one being nearly frontal and, the other, highly inclined. We utilize multipoint observations with magnetometers based in space and on the ground for comparisons. For satellites and ground stations occupying similar local time positions, we find that the ULF waves have larger amplitudes and tend to be more narrowband in the case of the nearly head-on impact, confirming previous simulation results. Additionally, we provide evidence that, due to their symmetric compression nature, nearly frontal shocks can excite only odd mode waves, while asymmetric compressions caused by inclined shocks can excite both odd and even mode waves. These results suggest that shock impact angles play crucial roles in mediating ULF wave-particle interactions in the inner magnetosphere. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Power spectrum; Shock waves; Comparative studies; Ground stations; Inner magnetosphere; Interplanetary shocks; Multi-point observation; Power-spectra; Ultra low frequencies; Wave amplitudes; Magnetosphere; amplitude; comparative study; compression; magnetosphere; satellite data; simulation; solar wind; wave equation; Alpes de Haute Provence; Angles; France; Provence-Alpes-Cote d'Azur; Satellites
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/169295
作者单位	Goddard Planetary Heliophysics Institute, University of Maryland, Baltimore County, Baltimore, MD, United States; NASA Goddard Space Flight Center, Greenbelt, MD, United States; Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States; Space Science Institute, Boulder, CO, United States; National Institute of Aerospace, Hampton, VA, United States; Institute of Physics of the Earth, Moscow, Russian Federation; Space Research Institute, Moscow, Russian Federation; Department of Physics, Catholic University of America, Washington, DC, United States
推荐引用方式 GB/T 7714	Oliveira D.M.,Hartinger M.D.,Xu Z.,et al. Interplanetary Shock Impact Angles Control Magnetospheric ULF Wave Activity: Wave Amplitude; Frequency; and Power Spectra[J],2020,47(24).
APA	Oliveira D.M..,Hartinger M.D..,Xu Z..,Zesta E..,Pilipenko V.A..,...&Silveira M.V.D..(2020).Interplanetary Shock Impact Angles Control Magnetospheric ULF Wave Activity: Wave Amplitude; Frequency; and Power Spectra.Geophysical Research Letters,47(24).
MLA	Oliveira D.M.,et al."Interplanetary Shock Impact Angles Control Magnetospheric ULF Wave Activity: Wave Amplitude; Frequency; and Power Spectra".Geophysical Research Letters 47.24(2020).