Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL079812 |
Microscopic Observations of Pulsating Aurora Associated With Chorus Element Structures: Coordinated Arase Satellite-PWING Observations | |
Ozaki, M.1; Shiokawa, K.2; Miyoshi, Y.2; Hosokawa, K.3; Oyama, S.2,4,5; Yagitani, S.1; Kasahara, Y.1; Kasaba, Y.6; Matsuda, S.7; Kataoka, R.5,8; Ebihara, Y.9; Ogawa, Y.5,8; Otsuka, Y.2; Kurita, S.2; Moore, R. C.10; Tanaka, Y. -M.5,8,11; Nose, M.2; Nagatsuma, T.12; Connors, M.13; Nishitani, N.2; Katoh, Y.6; Hikishima, M.2; Kumamoto, A.6; Tsuchiya, F.6; Kadokura, A.5,8,11; Nishiyama, T.5,8; Inoue, T.1; Imamura, K.1; Matsuoka, A.7; Shinohara, I.7 | |
2018-11-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:22页码:12125-12134 |
文章类型 | Article |
语种 | 英语 |
国家 | Japan; Finland; USA; Canada |
英文摘要 | Rapid (<1s) intensity modulation of pulsating auroras is caused by successive chorus elements as a response to wave-particle interactions in the magnetosphere. Here we found that a pulsating auroral patch responds to the time spacing for successive chorus elements and possibly to chorus subpacket structures with a time scale of tens of milliseconds. These responses were identified from coordinated Arase satellite and ground (Gakona, Alaska) observations with a high-speed auroral imager (100Hz). The temporal variations of auroral intensity in a few-hertz frequency range exhibited a spatial concentration at the lower-latitude edge of the auroral patch. The spatial evolution of the auroral patch showed repeated expansion/contraction with tens of kilometer scales in the ionosphere, which could be spatial behaviors in the wave-particle interactions. These observations indicate that chorus elements evolve coherently within the auroral patch, which is approximately 900km in the radial and longitudinal directions at the magnetic equator. Plain Language Summary This study shows a direct link between discrete chorus elements and intensity modulations in a pulsating auroral patch. Currently, it is widely believed that chorus waves play an important role in the generation of pulsating aurora. Many previous theoretical, simulation, and optical observation studies have suggested a one-to-one correspondence between successive chorus elements and intensity modulations of pulsating auroras in the frequency range of a few hertz. In this study, detailed spatiotemporal characteristics of a pulsating auroral patch were captured by coordinated observations between the Arase satellite and the ground-based network from study of dynamical variation of Particles and Waves in the INner magnetosphere using Ground-based network observations (PWING). The ideal conjugate observations reveal that a pulsating auroral patch responds to the time spacing of successive chorus elements and possibly to chorus subpacket structures with a time scale of tens of milliseconds. Furthermore, the intensity modulations of the pulsating aurora at a few-hertz range were caused by the spatial variations of the pulsating auroral patch. Therefore, this study provides important information on understanding rapid (tens of milliseconds) resonant interaction processes between chorus waves and charged particles. |
英文关键词 | pulsating aurora discrete chorus element wave-particle interaction Arase satellite ground-based observation network |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453250000004 |
WOS关键词 | WHISTLER-MODE CHORUS ; DAWN-DUSK ASYMMETRY ; VAN ALLEN PROBES ; FINE-STRUCTURE ; MAGNETOSPHERE ; OBSERVATORIES ; ELECTRONS ; PATCHES |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/28601 |
专题 | 气候变化 |
作者单位 | 1.Kanazawa Univ, Grad Sch Nat Sci & Technol, Kanazawa, Ishikawa, Japan; 2.Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan; 3.Univ Electrocommun, Grad Sch Informat & Engn, Chofu, Tokyo, Japan; 4.Univ Oulu, Ionosphere Res Unit, Oulu, Finland; 5.Natl Inst Polar Res, Tachikawa, Tokyo, Japan; 6.Tohoku Univ, Grad Sch Sci, Sendai, Miyagi, Japan; 7.Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Tokyo, Japan; 8.Grad Univ Adv Studies SOKENDAI, Dept Polar Sci, Tachikawa, Tokyo, Japan; 9.Kyoto Univ, Res Inst Sustainable Elumanosphere, Kyoto, Japan; 10.Univ Florida, Dept Elect & Comp Engn, Gainesville, FL USA; 11.Res Org Informat & Syst, Joint Support Ctr Data Sci Res, Tokyo, Japan; 12.Natl Inst Informat & Commun Technol, Tokyo, Japan; 13.Athabasca Univ, Ctr Sci, Athabasca, AB, Canada |
推荐引用方式 GB/T 7714 | Ozaki, M.,Shiokawa, K.,Miyoshi, Y.,et al. Microscopic Observations of Pulsating Aurora Associated With Chorus Element Structures: Coordinated Arase Satellite-PWING Observations[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(22):12125-12134. |
APA | Ozaki, M..,Shiokawa, K..,Miyoshi, Y..,Hosokawa, K..,Oyama, S..,...&Shinohara, I..(2018).Microscopic Observations of Pulsating Aurora Associated With Chorus Element Structures: Coordinated Arase Satellite-PWING Observations.GEOPHYSICAL RESEARCH LETTERS,45(22),12125-12134. |
MLA | Ozaki, M.,et al."Microscopic Observations of Pulsating Aurora Associated With Chorus Element Structures: Coordinated Arase Satellite-PWING Observations".GEOPHYSICAL RESEARCH LETTERS 45.22(2018):12125-12134. |
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