气候变化领域集成服务门户(CCPortal): Local-Time and Vertical Characteristics of Quasi-6-Day Oscillation in the Ionosphere During the 2019 Antarctic Sudden Stratospheric Warming

CCPortal

DOI	10.1029/2020GL090345
	Local-Time and Vertical Characteristics of Quasi-6-Day Oscillation in the Ionosphere During the 2019 Antarctic Sudden Stratospheric Warming
	Lin J.T.; Lin C.H.; Rajesh P.K.; Yue J.; Lin C.Y.; Matsuo T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:21
英文摘要	This study investigates new characteristics of ionospheric modulations driven by quasi-6-day wave (Q6DW) burst following a rare Antarctic sudden stratospheric warming (SSW) in September 2019. Local-time and vertical variations of the amplitude and phase of quasi-6-day oscillation (Q6DO) in the ionosphere are examined by using data assimilation analysis of electron density from three-dimensional Global Ionosphere Specification (GIS). The maximum amplitudes of Q6DO are located symmetrically ±20° off the magnetic equator at ~12 LT, with a secondary peak at 17 LT. The amplitude of Q6DO weakens at 15 LT, with a sudden phase shift, suggesting multiple dynamo processes driving the Q6DO-related ionospheric variations. The altitude-latitude structure of Q6DO shows that the ionospheric modulations extend beyond the equatorial ionization anomaly, indicating the wind dynamo source regions at higher latitudes. A likely physical mechanism is discussed based on possible interactions of Q6DW and semidiurnal migrating tides leading to the dynamo modulation and phase differences. © 2020. The Authors.
英文关键词	Interactive devices; Ionosphere; Modulation; Data assimilation; Equatorial ionization anomaly; Ionospheric variations; Maximum amplitude; Physical mechanism; Sudden stratospheric warming; Vertical characteristics; Vertical variation; Ionospheric measurement; amplitude; data assimilation; electron; electron density; global warming; ionization; ionosphere; oscillation; stratosphere; sudden stratospheric warming; 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/169531
作者单位	Department of Earth Science, National Cheng Kung University, Tainan, Taiwan; Physics Department, Catholic University of America, Washington, DC, United States; NASA Goddard Flight Center, Greenbelt, MD, United States; Center for Astronautical Physics and Engineering, National Central University, Taoyuan, Taiwan; Department of Space Science and Engineering, National Central University, Taoyuan, Taiwan; Ann and H. J. Smead Department of Aerospace Engineering Sciences, University of Colorado Boulder, Boulder, CO, United States
推荐引用方式 GB/T 7714	Lin J.T.,Lin C.H.,Rajesh P.K.,et al. Local-Time and Vertical Characteristics of Quasi-6-Day Oscillation in the Ionosphere During the 2019 Antarctic Sudden Stratospheric Warming[J],2020,47(21).
APA	Lin J.T.,Lin C.H.,Rajesh P.K.,Yue J.,Lin C.Y.,&Matsuo T..(2020).Local-Time and Vertical Characteristics of Quasi-6-Day Oscillation in the Ionosphere During the 2019 Antarctic Sudden Stratospheric Warming.Geophysical Research Letters,47(21).
MLA	Lin J.T.,et al."Local-Time and Vertical Characteristics of Quasi-6-Day Oscillation in the Ionosphere During the 2019 Antarctic Sudden Stratospheric Warming".Geophysical Research Letters 47.21(2020).