气候变化领域集成服务门户(CCPortal): ARTEMIS Observations of Foreshock Transients in the Midtail Foreshock

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DOI	10.1029/2020GL090393
	ARTEMIS Observations of Foreshock Transients in the Midtail Foreshock
	Liu T.Z.; Wang C.-P.; Wang B.; Wang X.; Zhang H.; Lin Y.; Angelopoulos V.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:21
英文摘要	Foreshock transients such as hot flow anomalies (HFAs) are frequently observed in the dayside foreshock. They can disturb the local bow shock, magnetopause, and consequently the magnetosphere-ionosphere system through dynamic pressure perturbations. Recent multipoint observations found that such perturbations can even propagate from the dayside to the midtail. However, whether the drivers of such perturbations, foreshock transients, persist in the midtail foreshock has not been observed. Thus, it is unclear whether the observed nightside magnetosheath/magnetopause perturbations are traveling waves or continuously driven by a propagating foreshock transient. Using two Acceleration, Reconnection, Turbulence, and Electrodynamics of the Moon's Interaction with the Sun (ARTEMIS) spacecraft, we report direct observational evidence of foreshock transients in the midtail foreshock. We present a case study showing an elongated mature HFA propagating with its driver discontinuity from TH-C (X ~ −43 RE) to TH-B (X ~ −48 RE). Our results confirm that foreshock transients disturb not only the dayside bow shock but also the nightside bow shock while propagating tailward. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Ionosphere; Magnetosphere; Plasma shock waves; ARTEMIS; Bow shocks; Dynamic pressures; Hot flow anomaly; Magnetosheaths; Magnetosphere-ionosphere systems; Multi-point observation; Traveling wave; Earthquakes; anomaly; electrodynamics; foreshock; ionosphere; magnetopause; Moon; perturbation; spacecraft
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/169484
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; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Physics Department, Auburn University, Auburn, AL, United States; Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Liu T.Z.,Wang C.-P.,Wang B.,et al. ARTEMIS Observations of Foreshock Transients in the Midtail Foreshock[J],2020,47(21).
APA	Liu T.Z..,Wang C.-P..,Wang B..,Wang X..,Zhang H..,...&Angelopoulos V..(2020).ARTEMIS Observations of Foreshock Transients in the Midtail Foreshock.Geophysical Research Letters,47(21).
MLA	Liu T.Z.,et al."ARTEMIS Observations of Foreshock Transients in the Midtail Foreshock".Geophysical Research Letters 47.21(2020).