GSTDTAP  > 气候变化
DOI10.1029/2018GL078589
A Case Study of Near-Earth Magnetotail Conditions at Substorm and Pseudosubstorm Onsets
Miyashita, Y.1; Angelopoulos, V.2; Fukui, K.3; Machida, S.3
2018-07-16
发表期刊GEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
EISSN1944-8007
出版年2018
卷号45期号:13页码:6353-6361
文章类型Article
语种英语
国家South Korea; USA; Japan
英文摘要

While a substorm involves auroral poleward expansion after initial brightening, a pseudosubstorm (pseudobreakup) subsides without progressing to poleward expansion. To understand what makes this difference, we studied near-Earth magnetotail conditions at a pseudosubstorm onset and the subsequent substorm onset, using multipoint Time History of Events and Macroscale Interactions during Substorms spacecraft data. In the present event, near-Earth magnetic reconnection possibly occurred before initial brightening for both pseudosubstorm and substorm. In the near-Earth magnetotail at X similar to - 10 R-E, the ion beta, ion pressure, and ion and total (ion plus magnetic) pressure gradient projection along two closely located spacecraft were smaller and magnetic field lines were less stretched around the pseudosubstorm initial brightening than around the substorm initial brightening. Dipolarization did not occur for the pseudosubstorm, whereas it began just before poleward expansion for the substorm. These observations suggest that conditions of the near-Earth magnetotail possibly affect whether the initial action develops into a full-fledged substorm.


Plain Language Summary A pseudosubstorm, also called pseudobreakup, is an auroral phenomenon very similar to a substorm but essentially differs in absence of active auroral expansion. In this paper, we studied conditions of the magnetotail at the beginning of these auroral phenomena on the basis of spacecraft observations. This comparison is expected to give us some clues to understanding of substorm triggering and development mechanisms. We found that plasma and magnetic field conditions in the magnetotail differed between the two auroral phenomena. This finding implies that magnetotail conditions possibly affect auroral development.


英文关键词pseudosubstorm pseudobreakup substorm triggering substorm onset
领域气候变化
收录类别SCI-E
WOS记录号WOS:000439784300004
WOS关键词PLASMA SHEET ; BALLOONING INSTABILITY ; PSEUDOBREAKUP ; IONOSPHERE ; MAGNETOSPHERE ; MAGNETOMETER ; BREAKUP ; ARRAY
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/25574
专题气候变化
作者单位1.Korea Astron & Space Sci Inst, Daejeon, South Korea;
2.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA;
3.Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi, Japan
推荐引用方式
GB/T 7714
Miyashita, Y.,Angelopoulos, V.,Fukui, K.,et al. A Case Study of Near-Earth Magnetotail Conditions at Substorm and Pseudosubstorm Onsets[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(13):6353-6361.
APA Miyashita, Y.,Angelopoulos, V.,Fukui, K.,&Machida, S..(2018).A Case Study of Near-Earth Magnetotail Conditions at Substorm and Pseudosubstorm Onsets.GEOPHYSICAL RESEARCH LETTERS,45(13),6353-6361.
MLA Miyashita, Y.,et al."A Case Study of Near-Earth Magnetotail Conditions at Substorm and Pseudosubstorm Onsets".GEOPHYSICAL RESEARCH LETTERS 45.13(2018):6353-6361.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Miyashita, Y.]的文章
[Angelopoulos, V.]的文章
[Fukui, K.]的文章
百度学术
百度学术中相似的文章
[Miyashita, Y.]的文章
[Angelopoulos, V.]的文章
[Fukui, K.]的文章
必应学术
必应学术中相似的文章
[Miyashita, Y.]的文章
[Angelopoulos, V.]的文章
[Fukui, K.]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。