气候变化领域集成服务门户(CCPortal): Dayside Field-Aligned Current Impacts on Ionospheric Irregularities

CCPortal

DOI	10.1029/2019GL086722
	Dayside Field-Aligned Current Impacts on Ionospheric Irregularities
	Fæhn Follestad A.; Herlingshaw K.; Ghadjari H.; Knudsen D.J.; McWilliams K.A.; Moen J.I.; Spicher A.; Wu J.; Oksavik K.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	Global Navigation Satellite Systems (GNSS) are subject to disturbances caused by plasma irregularities in the ionosphere. Studies have suggested that in addition to the gradient drift and Kelvin-Helmholtz instabilities, electron precipitation may be important for phase scintillations in the dayside auroral region. This study combines in situ Swarm data with ground GNSS observations to investigate the potential role of filamentary field-aligned currents (FACs) on phase scintillations in the dayside auroral region by analyzing 22 events with phase scintillations exceeding 0.45 radians. We observe colocation between regions of severe phase scintillations and highly filamented FACs with fluctuations measured in the spacecraft frame of the order of 20 Hz. The observations indicate that filamentary FACs are crucial drivers for irregularities responsible for creating severe phase scintillations measured in the dayside auroral region and are thus of significant importance in the context of space weather impact on satellite communication. ©2020. The Authors.
英文关键词	Ionosphere; Ionospheric measurement; Magnetosphere; Plasma flow; Satellite communication systems; Scintillation; Space flight; Electron precipitation; Field aligned currents; Global Navigation Satellite Systems; Ionospheric irregularities; Kelvin- helmholtz instabilities; Phase scintillations; Plasma irregularities; Satellite communications; Global positioning system; aurora; frequency analysis; GNSS; ionosphere; Kelvin-Helmholtz instability; plasma; satellite altimetry; 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/170263
作者单位	Department of Physics, University of Oslo, Oslo, Norway; The University Centre in Svalbard, Longyearbyen, Norway; Birkeland Centre for Space Science, Department of Physics and Technology, University of Bergen, Bergen, Norway; Department of Physics and Astronomy, University of Calgary, Calgary, AB, Canada; Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, SK, Canada
推荐引用方式 GB/T 7714	Fæhn Follestad A.,Herlingshaw K.,Ghadjari H.,et al. Dayside Field-Aligned Current Impacts on Ionospheric Irregularities[J],2020,47(11).
APA	Fæhn Follestad A..,Herlingshaw K..,Ghadjari H..,Knudsen D.J..,McWilliams K.A..,...&Oksavik K..(2020).Dayside Field-Aligned Current Impacts on Ionospheric Irregularities.Geophysical Research Letters,47(11).
MLA	Fæhn Follestad A.,et al."Dayside Field-Aligned Current Impacts on Ionospheric Irregularities".Geophysical Research Letters 47.11(2020).