DOI: 10.1002/2015GL064700
论文题名: Using patchy pulsating aurora to remote sense magnetospheric convection
作者: Yang B. ; Donovan E. ; Liang J. ; Ruohoniemi J.M. ; Spanswick E.
刊名: Geophysical Research Letters
ISSN: 0094-9259
EISSN: 1944-8990
出版年: 2015
卷: 42, 期: 13 起始页码: 5083
结束页码: 5089
语种: 英语
英文关键词: convection
; patchy pulsating aurora
Scopus关键词: Heat convection
; Magnetosphere
; Azimuthal velocity
; Convection velocity
; High-time resolution
; Magnetospheric convection
; Pulsating auroras
; Super dual auroral radar network
; Time sequences
; Viewing conditions
; Remote sensing
; atmospheric convection
; atmospheric electricity
; aurora
; azimuth
; magnetosphere
; remote sensing
; storm
英文摘要: Five patchy pulsating aurora (PPA) patches have been identified in data obtained from the Gillam Time History of Events and Macroscale Interactions during Substorms (THEMIS) all-sky imager (ASI). We found that azimuthal velocities of five patches derived from THEMIS ASI data were close to the same value as the local convection velocities as obtained from analysis of Super Dual Auroral Radar Network data, consistent with the idea that the patch motion is primarily due to E×B convection. We argue that this means that we can infer 2-D maps of the time-evolving convection from time sequences of PPA. Further, given that the E×B convection is understood to be a projection of magnetospheric convection, this means that, provided auroral and viewing conditions cooperate, patch motion can be used for remote sensing magnetospheric convection over across-extended regions with fairly high time resolution. This is the first detailed demonstration of the equivalence of patch velocities and E×B convection. Key Points The motion of patches follows the E×B drift Suggest that the structure of PPA patches reflects cold plasma structures Infer 2-D maps of the time-evolving convection from time sequences of PPA. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938199496&doi=10.1002%2f2015GL064700&partnerID=40&md5=d56c169e669f0c111682b721e9f6a82e
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8875
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Department of Physics and Astronomy, University of Calgary, Calgary, AB, Canada
Recommended Citation:
Yang B.,Donovan E.,Liang J.,et al. Using patchy pulsating aurora to remote sense magnetospheric convection[J]. Geophysical Research Letters,2015-01-01,42(13).