NSSC OpenIR  > 空间科学部
On the ionospheric source region of cold ion outflow
Li, K.; Haaland, S.; Eriksson, A.; Andre, M.; Engwall, E.; Wei, Y.; Kronberg, E. A.; Fraenz, M.; Daly, P. W.; Zhao, H.; Ren, Q. Y.; Haaland, S (reprint author), Max Planck Inst Solar Syst Res, Max Planck Str 2, DE-37191 Katlenburg Lindau, Germany.
Department空间科学部
Source PublicationGEOPHYSICAL RESEARCH LETTERS
2012
Volume39Pages:L18102
ISSN0094-8276
Language英语
AbstractRecent studies have shown that low energy ions constitute a significant part of the total ion population in the Earth's magnetosphere. In this study, we have used a comprehensive data set with measurements of cold (total energy less than 70 eV) ion velocity and density to determine their source. This data set is derived from Cluster satellite measurements combined with solar wind and interplanetary magnetic field measurements and geomagnetic indices. By using the guiding center equation of motion, we were able to calculate the trajectories and thus determine the source region of the cold ions. Our results show that the polar cap region is the primary source for cold ions. We also found that the expansion and contraction of the polar cap as a consequence of changes in solar wind parameters were correlated with the source region size and intensity of the cold ion outflow. Elevated outflow fluxes near the nightside auroral zone and the dayside cusps during disturbed conditions suggest that energy and particle precipitation from the magnetosphere or directly from the solar wind can enhance the outflow of cold ions from the ionosphere. Citation: Li, K., et al. (2012), On the ionospheric source region of cold ion outflow, Geophys. Res. Lett., 39, L18102, doi:10.1029/2012GL053297.; Recent studies have shown that low energy ions constitute a significant part of the total ion population in the Earth's magnetosphere. In this study, we have used a comprehensive data set with measurements of cold (total energy less than 70 eV) ion velocity and density to determine their source. This data set is derived from Cluster satellite measurements combined with solar wind and interplanetary magnetic field measurements and geomagnetic indices. By using the guiding center equation of motion, we were able to calculate the trajectories and thus determine the source region of the cold ions. Our results show that the polar cap region is the primary source for cold ions. We also found that the expansion and contraction of the polar cap as a consequence of changes in solar wind parameters were correlated with the source region size and intensity of the cold ion outflow. Elevated outflow fluxes near the nightside auroral zone and the dayside cusps during disturbed conditions suggest that energy and particle precipitation from the magnetosphere or directly from the solar wind can enhance the outflow of cold ions from the ionosphere. Citation: Li, K., et al. (2012), On the ionospheric source region of cold ion outflow, Geophys. Res. Lett., 39, L18102, doi:10.1029/2012GL053297.
Indexed BySCI ; EI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3225
Collection空间科学部
Corresponding AuthorHaaland, S (reprint author), Max Planck Inst Solar Syst Res, Max Planck Str 2, DE-37191 Katlenburg Lindau, Germany.
Recommended Citation
GB/T 7714
Li, K.,Haaland, S.,Eriksson, A.,et al. On the ionospheric source region of cold ion outflow[J]. GEOPHYSICAL RESEARCH LETTERS,2012,39:L18102.
APA Li, K..,Haaland, S..,Eriksson, A..,Andre, M..,Engwall, E..,...&Haaland, S .(2012).On the ionospheric source region of cold ion outflow.GEOPHYSICAL RESEARCH LETTERS,39,L18102.
MLA Li, K.,et al."On the ionospheric source region of cold ion outflow".GEOPHYSICAL RESEARCH LETTERS 39(2012):L18102.
Files in This Item: Download All
File Name/Size DocType Version Access License
201239L18102.pdf(403KB) 开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Li, K.]'s Articles
[Haaland, S.]'s Articles
[Eriksson, A.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Li, K.]'s Articles
[Haaland, S.]'s Articles
[Eriksson, A.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Li, K.]'s Articles
[Haaland, S.]'s Articles
[Eriksson, A.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 201239L18102.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.