气候变化领域集成服务门户(CCPortal): Regulation of ionospheric plasma velocities by thermospheric winds

CCPortal

DOI	10.1038/s41561-021-00848-4
	Regulation of ionospheric plasma velocities by thermospheric winds
	Immel T.J.; Harding B.J.; Heelis R.A.; Maute A.; Forbes J.M.; England S.L.; Mende S.B.; Englert C.R.; Stoneback R.A.; Marr K.; Harlander J.M.; Makela J.J.
发表日期	2021
ISSN	1752-0894
卷号	14 期号:12
英文摘要	Earth’s equatorial ionosphere exhibits substantial and unpredictable day-to-day variations in density and morphology. This presents challenges in preparing for adverse impacts on geopositioning systems and radio communications even 24 hours in advance. The variability is now theoretically understood as a manifestation of thermospheric weather, where winds in the upper atmosphere respond strongly to a spectrum of atmospheric waves that propagate into space from the lower and middle atmosphere. First-principles simulations predict related, large changes in the ionosphere, primarily through modification of wind-driven electromotive forces: the wind-driven dynamo. Here we show the first direct evidence of the action of a wind dynamo in space, using the coordinated, space-based observations of winds and plasma motion made by the National Aeronautics and Space Administration Ionospheric Connection Explorer. A clear relationship is found between vertical plasma velocities measured at the magnetic equator near 600 km and the thermospheric winds much farther below. Significant correlations are found between the plasma and wind velocities during several successive precession cycles of the Ionospheric Connection Explorer’s orbit. Prediction of thermospheric winds in the 100–150 km altitude range emerges as the key to improved prediction of Earth’s plasma environment. © 2021, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	altitude; ionosphere; plasma; thermosphere; upper atmosphere
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250830
作者单位	Space Sciences Laboratory, University of California, Berkeley, CA, United States; High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO, United States; William B. Hanson Center for Space Sciences, University of Texas, Dallas, TX, United States; Ann and H.J. Smead Department of Aerospace Engineering Sciences, University of Colorado, Boulder, CO, United States; Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States; Space Science Division, United States Naval Research Laboratory, Washington, DC, United States; Space Systems Research Corporation, Alexandria, VA, United States; Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL, United States
推荐引用方式 GB/T 7714	Immel T.J.,Harding B.J.,Heelis R.A.,et al. Regulation of ionospheric plasma velocities by thermospheric winds[J],2021,14(12).
APA	Immel T.J..,Harding B.J..,Heelis R.A..,Maute A..,Forbes J.M..,...&Makela J.J..(2021).Regulation of ionospheric plasma velocities by thermospheric winds.Nature Geoscience,14(12).
MLA	Immel T.J.,et al."Regulation of ionospheric plasma velocities by thermospheric winds".Nature Geoscience 14.12(2021).