CCPortal
DOI10.1029/2020GL091184
Magnetospheric Multiscale Observations of Earth's Oblique Bow Shock Reformation by Foreshock Ultralow-Frequency Waves
Liu T.Z.; Hao Y.; Wilson L.B.; III; Turner D.L.; Zhang H.
发表日期2021
ISSN 0094-8276
卷号48期号:2
英文摘要Collisionless shocks can be nonstationary with periodic reformation shown in many simulation results, but direct observations are still tenuous and difficult to conclusively interpret. In this study, using Magnetospheric Multiscale (MMS) observations, we report direct observational evidence of Earth's oblique bow shock reformation driven by the foreshock Ultralow-Frequency (ULF) waves. When the four MMS spacecraft were in a string-of-pearls formation roughly along the bow shock normal, they observed that when each period of foreshock ULF waves encountered the bow shock, a new shock ramp formed. Meanwhile, in the magnetosheath, the old bow shock's remnants were observed periodically convecting downstream. We propose that the reformation mechanism of the oblique bow shock is the variation of the upstream conditions by the periodic ULF waves as they encounter the bow shock. We also examine the nature of reflected ions during the reformation process. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词Earthquakes; Magnetosphere; Collisionless shocks; Direct observations; Magnetosheaths; Magnetospheric multi scale; Nonstationary; Reformation process; Ultra low frequencies; Upstream conditions; Plasma shock waves
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/169187
作者单位Cooperative Programs for the Advancement of Earth System Science, University Corporation for Atmospheric Research, Boulder, CO, United States; Geophysical Institute, University of Alaska, Fairbanks, AK, United States; Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, China; Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Johns Hopkins University Applied Physics Laboratory, Johns Hopkins University, Laurel, MD, United States
推荐引用方式
GB/T 7714
Liu T.Z.,Hao Y.,Wilson L.B.,et al. Magnetospheric Multiscale Observations of Earth's Oblique Bow Shock Reformation by Foreshock Ultralow-Frequency Waves[J],2021,48(2).
APA Liu T.Z.,Hao Y.,Wilson L.B.,III,Turner D.L.,&Zhang H..(2021).Magnetospheric Multiscale Observations of Earth's Oblique Bow Shock Reformation by Foreshock Ultralow-Frequency Waves.Geophysical Research Letters,48(2).
MLA Liu T.Z.,et al."Magnetospheric Multiscale Observations of Earth's Oblique Bow Shock Reformation by Foreshock Ultralow-Frequency Waves".Geophysical Research Letters 48.2(2021).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Liu T.Z.]的文章
[Hao Y.]的文章
[Wilson L.B.]的文章
百度学术
百度学术中相似的文章
[Liu T.Z.]的文章
[Hao Y.]的文章
[Wilson L.B.]的文章
必应学术
必应学术中相似的文章
[Liu T.Z.]的文章
[Hao Y.]的文章
[Wilson L.B.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。