Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019GL082824 |
Directed Network of Substorms Using SuperMAG Ground-Based Magnetometer Data | |
Orr, L.1; Chapman, S. C.1; Gjerloev, J. W.2,3 | |
2019-06-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
![]() |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2019 |
卷号 | 46期号:12页码:6268-6278 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA; Norway |
英文摘要 | We quantify the spatiotemporal evolution of the substorm ionospheric current system utilizing the SuperMAG 100+ magnetometers. We construct dynamical directed networks from this data for the first time. If the canonical cross-correlation between vector magnetic field perturbations observed at two magnetometer stations exceeds a threshold, they form a network connection. The time lag at which canonical cross-correlation is maximal determines the direction of propagation or expansion of the structure captured by the network connection. If spatial correlation reflects ionospheric current patterns, network properties can test different models for the evolving substorm current system. We select 86 isolated substorms based on nightside ground station coverage. We find, and obtain the timings for, a consistent picture in which the classic substorm current wedge forms. A current system is seen premidnight following the substorm current wedge westward expansion. Later, there is a weaker signal of eastward expansion. Finally, there is evidence of substorm-enhanced convection. |
英文关键词 | substorms networks correlation ground magnetometers SuperMAG |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000477616300013 |
WOS关键词 | MAGNETOSPHERIC SUBSTORMS ; SOLAR-WIND ; IONOSPHERE ; SYSTEM ; MODEL |
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/184212 |
专题 | 气候变化 |
作者单位 | 1.Univ Warwick, Ctr Fus Space & Astrophys, Coventry, W Midlands, England; 2.Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA; 3.Univ Bergen, Birkeland Ctr, Bergen, Norway |
推荐引用方式 GB/T 7714 | Orr, L.,Chapman, S. C.,Gjerloev, J. W.. Directed Network of Substorms Using SuperMAG Ground-Based Magnetometer Data[J]. GEOPHYSICAL RESEARCH LETTERS,2019,46(12):6268-6278. |
APA | Orr, L.,Chapman, S. C.,&Gjerloev, J. W..(2019).Directed Network of Substorms Using SuperMAG Ground-Based Magnetometer Data.GEOPHYSICAL RESEARCH LETTERS,46(12),6268-6278. |
MLA | Orr, L.,et al."Directed Network of Substorms Using SuperMAG Ground-Based Magnetometer Data".GEOPHYSICAL RESEARCH LETTERS 46.12(2019):6268-6278. |
条目包含的文件 | 条目无相关文件。 |
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。
修改评论