气候变化领域集成服务门户(CCPortal): First Simultaneous Lidar Observations of Thermosphere-Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S; 166.67°E); Antarctica With Concurrent Measurements of Aurora Activity; Enhanced Ionization Layers; and Converging Electric Field

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DOI	10.1029/2020GL090181
	First Simultaneous Lidar Observations of Thermosphere-Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S; 166.67°E); Antarctica With Concurrent Measurements of Aurora Activity; Enhanced Ionization Layers; and Converging Electric Field
	Chu X.; Nishimura Y.; Xu Z.; Yu Z.; Plane J.M.C.; Gardner C.S.; Ogawa Y.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	We report the first simultaneous, common-volume lidar observations of thermosphere-ionosphere Fe (TIFe) and Na (TINa) layers in Antarctica. We also report the observational discovery of nearly one-to-one correspondence between TIFe and aurora activity, enhanced ionization layers, and converging electric fields. Distinctive TIFe layers have a peak density of ~384 cm−3 and the TIFe mixing ratio peaks around 123 km, ~5 times the mesospheric layer maximum. All evidence shows that Fe+ ion-neutralization is the major formation mechanism of TIFe layers. The TINa mixing ratio often exhibits a broad peak at TIFe altitudes, providing evidence for in situ production via Na+ neutralization. However, the tenuous TINa layers persist long beyond TIFe disappearance and reveal gravity wave perturbations, suggesting a dynamic background of neutral Na, but not Fe, above 110 km. The striking differences between distinct TIFe and diffuse TINa suggest differential transport between Fe and Na, possibly due to mass separation. ©2020. The Authors.
英文关键词	Electric fields; Ionization; Ionospheric measurement; Mixing; Optical radar; Dynamic background; Formation mechanism; In-situ production; Lidar observation; Measurements of; Mesospheric layers; Mixing ratios; Thermosphere-ionosphere; Ionosphere; aurora; electric field; gravity wave; in situ measurement; ionization; ionosphere; iron; lidar; mixing ratio; observatory; perturbation; sodium; thermosphere; Antarctica
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/169552
作者单位	Cooperative Institute of Research in Environmental Sciences and Department of Aerospace Engineering Sciences, University of Colorado Boulder, Boulder, CO, United States; Department of Electrical and Computer Engineering and Center for Space Physics, Boston University, Boston, MA, United States; Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States; Harbin Institute of Technology, Shenzhen, China; School of Chemistry, University of Leeds, Leeds, United Kingdom; Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL, United States; National Institute of Polar Research, Tokyo, Japan
推荐引用方式 GB/T 7714	Chu X.,Nishimura Y.,Xu Z.,et al. First Simultaneous Lidar Observations of Thermosphere-Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S; 166.67°E); Antarctica With Concurrent Measurements of Aurora Activity; Enhanced Ionization Layers; and Converging Electric Field[J],2020,47(20).
APA	Chu X..,Nishimura Y..,Xu Z..,Yu Z..,Plane J.M.C..,...&Ogawa Y..(2020).First Simultaneous Lidar Observations of Thermosphere-Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S; 166.67°E); Antarctica With Concurrent Measurements of Aurora Activity; Enhanced Ionization Layers; and Converging Electric Field.Geophysical Research Letters,47(20).
MLA	Chu X.,et al."First Simultaneous Lidar Observations of Thermosphere-Ionosphere Fe and Na (TIFe and TINa) Layers at McMurdo (77.84°S; 166.67°E); Antarctica With Concurrent Measurements of Aurora Activity; Enhanced Ionization Layers; and Converging Electric Field".Geophysical Research Letters 47.20(2020).