气候变化领域集成服务门户(CCPortal): Asymmetric Development of Auroral Surges in the Northern and Southern Hemispheres

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DOI	10.1029/2020GL088750
	Asymmetric Development of Auroral Surges in the Northern and Southern Hemispheres
	Uchida H.A.; Kataoka R.; Kadokura A.; Murase K.; Yukimatu A.S.; Miyoshi Y.; Shiokawa K.; Ebihara Y.; Hosokawa K.; Matsuoka A.; Kurita S.; Fujita S.; Shinohara I.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:13
英文摘要	Simultaneous eastward and westward traveling surges were observed at Tjörnes, Iceland, and Syowa station, Antarctica, respectively. Several remarkable differences were identified. (1) The position of the initial bright spot was shifted by 1.7 to 2.3 MLT between both hemispheres. (2) The surges differ in traveling speed between the eastward traveling surge (6.5 km s−1) and the westward traveling surge (1.3 km s−1). (3) The Arase satellite was located on a geomagnetic field line connecting both ground stations and observed a significant excess in westward component of the magnetic field, which is consistent with the large shifts of the initial bright spots in both hemispheres. (4) The background Hall current flows eastward (Northern Hemisphere) and westward (Southern Hemisphere). The observed north-south asymmetry of the traveling surges suggests that the ionosphere can play an essential role in controlling the fundamental spatiotemporal development of auroras in both hemispheres. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Ionosphere; Bright spots; Geomagnetic field lines; Ground stations; Hall current; Large shifts; North-south asymmetry; Northern Hemispheres; Southern Hemisphere; Geomagnetism; aurora; geomagnetic field; ionosphere; Northern Hemisphere; satellite altimetry; Southern Hemisphere; Antarctica; Iceland; Tjornes Peninsula
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/170165
作者单位	Department of Polar Science, The Graduate University for Advanced Studies, Tachikawa, Japan; National Institute of Polar Research, Research Organization of Information and Systems, Tachikawa, Japan; Polar Environment Data Science Center, Joint Support-Center for Data Science Research, Research Organization of Information and Systems, Tachikawa, Japan; Institute for Space–Earth Environmental Research, Nagoya University, Nagoya, Japan; Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Japan; Graduate School of Informatics and Engineering, The University of Electro-Communications, Chofu, Japan; Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, Japan; Meteorological College, Kashiwa, Japan
推荐引用方式 GB/T 7714	Uchida H.A.,Kataoka R.,Kadokura A.,et al. Asymmetric Development of Auroral Surges in the Northern and Southern Hemispheres[J],2020,47(13).
APA	Uchida H.A..,Kataoka R..,Kadokura A..,Murase K..,Yukimatu A.S..,...&Shinohara I..(2020).Asymmetric Development of Auroral Surges in the Northern and Southern Hemispheres.Geophysical Research Letters,47(13).
MLA	Uchida H.A.,et al."Asymmetric Development of Auroral Surges in the Northern and Southern Hemispheres".Geophysical Research Letters 47.13(2020).