气候变化领域集成服务门户(CCPortal): Ionospheric Modulation by Storm Time Pc5 ULF Pulsations and the Structure Detected by PFISR-THEMIS Conjunction

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DOI	10.1029/2020GL089060
	Ionospheric Modulation by Storm Time Pc5 ULF Pulsations and the Structure Detected by PFISR-THEMIS Conjunction
	Wang B.; Nishimura Y.; Hartinger M.; Sivadas N.; Lyons L.L.; Varney R.H.; Angelopoulos V.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:16
英文摘要	We investigate a significant duskside ionospheric density modulation in the Pc5 frequency band and related spatial structures during the storm on 28 May 2017. We take advantage of 3-D ionospheric observations by the PFISR and simultaneous magnetospheric in situ observations. Inversion of the density suggests that the Pc5 pulsations modulated precipitating electrons over a broad range of energies (~5–500 keV). Such strong electron precipitation likely caused a significant density modulation rate of ~8 and ionospheric Pedersen and Hall conductances to vary rapidly and peaked at ~70–100 S. The reflection coefficient was also substantially modulated between 0.5 and 0.9. Moreover, the observations by the multibeam PFISR and THEMIS E both reveal that the Pc5 pulsations propagated westward in the duskside region. It suggests that quasiperiodic activities in the nightside and subsequent duskward drifts were likely the source of the duskside Pc5 pulsations. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Magnetosphere; Storms; Density modulation; Electron precipitation; Hall conductance; In-situ observations; Multibeams; Quasi-periodic; Spatial structure; Modulation; electrical conductivity; electron density; frequency analysis; geomagnetic storm; in situ measurement; ionosphere; temporal analysis; three-dimensional modeling
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/169863
作者单位	Geophysical Institute, University of Alaska Fairbanks, Fairbanks, AK, United States; Department of Electrical and Computer Engineering and Center for Space Sciences, Boston University, Boston, MA, United States; Space Science Institute, Boulder, CO, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, United States; SRI International, Menlo Park, CA, United States; Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Wang B.,Nishimura Y.,Hartinger M.,et al. Ionospheric Modulation by Storm Time Pc5 ULF Pulsations and the Structure Detected by PFISR-THEMIS Conjunction[J],2020,47(16).
APA	Wang B..,Nishimura Y..,Hartinger M..,Sivadas N..,Lyons L.L..,...&Angelopoulos V..(2020).Ionospheric Modulation by Storm Time Pc5 ULF Pulsations and the Structure Detected by PFISR-THEMIS Conjunction.Geophysical Research Letters,47(16).
MLA	Wang B.,et al."Ionospheric Modulation by Storm Time Pc5 ULF Pulsations and the Structure Detected by PFISR-THEMIS Conjunction".Geophysical Research Letters 47.16(2020).