气候变化领域集成服务门户(CCPortal): Is Nightside Outflow Required to Induce Magnetospheric Sawtooth Oscillations

CCPortal

DOI	10.1029/2019GL086419
	Is Nightside Outflow Required to Induce Magnetospheric Sawtooth Oscillations
	Zhang B.; Brambles O.J.; Lotko W.; Lyon J.G.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:6
英文摘要	Ionospheric outflow plays an important role in the mass coupling between the ionosphere and the coupled solar wind-magnetosphere system. Previous modeling studies have shown that outflowing ionospheric ions may induce magnetospheric sawtooth oscillations through mass loading of the magnetotail, stretching the magnetic field lines, and reducing nightside reconnection. The spatial distribution of polar cap outflow in these simulation studies produces significant outflow in the auroral oval and lacks a distinct cusp source. Thus, the question arises whether cusp outflow can induce sawtooth oscillations. We show controlled numerical experiments with magnetospheric sawtooth oscillations induced by an idealized cusp outflow for driving conditions representative of the interaction of an interplanetary coronal mass ejection with Earth's magnetosphere. The analysis shows that although only a small portion (10%) of the cusp outflow is entrained within the plasma sheet, it is effective in inducing magnetospheric sawtooth oscillations, similar to previous experiments. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Ionosphere; Plasma oscillations; Plasma sheaths; cusp; ionospheric outflow; Magnetotails; Multi-fluids; Sawtooth oscillations; Magnetosphere; coronal mass ejection; ionosphere; magnetic field; magnetosphere; magnetotail; oscillation; outflow; spatial distribution
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/170540
作者单位	Department of Earth Sciences, the University of Hong Kong, Pokfulam, Hong Kong SAR, China; High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, United States; Preston, United Kingdom; Thayer School of Engineering, Dartmouth College, Hanover, NH, United States; Department of Physics and Astronomy, Dartmouth College, Hanover, NH, United States
推荐引用方式 GB/T 7714	Zhang B.,Brambles O.J.,Lotko W.,et al. Is Nightside Outflow Required to Induce Magnetospheric Sawtooth Oscillations[J],2020,47(6).
APA	Zhang B.,Brambles O.J.,Lotko W.,&Lyon J.G..(2020).Is Nightside Outflow Required to Induce Magnetospheric Sawtooth Oscillations.Geophysical Research Letters,47(6).
MLA	Zhang B.,et al."Is Nightside Outflow Required to Induce Magnetospheric Sawtooth Oscillations".Geophysical Research Letters 47.6(2020).