Climate Change Data Portal
DOI | 10.1029/2020GL091184 |
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。 |
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。