NSSC OpenIR  > 空间科学部
Auroral electrojets variations caused by recurrent high-speed solar wind streams during the extreme solar minimum of 2008
Guo, Jianpeng; Feng, Xueshang; Pulkkinen, T. I.; Tanskanen, E. I.; Xu, Wenyao; Lei, Jiuhou; Emery, Barbara A.; Guo, JP (reprint author), Chinese Acad Sci, SIGMA Weather Grp, State Key Lab Space Weather, Ctr Space Sci & Appl Res, 1 Nanertiao, Beijing 100190, Peoples R China.
Department空间科学部
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
2012
Volume117Pages:A04307
ISSN0148-0227
Language英语
AbstractThe IMAGE network magnetic measurements are used to investigate the response of the auroral electrojets to the recurrent high-speed solar wind streams (HSSs) during the extreme solar minimum period of 2008. We first compare the global AU/AL indices with the corresponding IU/IL indices determined from the IMAGE magnetometer chain and find that the local IMAGE chain can better monitor the activity in MLT sectors 1230-2230 for IU and 2230-0630 for IL during 2008. In the optimal MLT sectors, the eastward and westward electrojets and their central latitude reveal clear 9-day periodic variations associated with the recurrent HSSs. For the 9-day perturbations, both the eastward and westward electrojet currents are better correlated with parallel electric field (EPAR) and electron hemispheric power (HPe) than with other forcing parameters. Interestingly, the eastward electrojet shows good correlations (r > 0.6) with EPAR and HPe only in part of its optimal MLT-sector, roughly 1200-1800, while the westward electrojet shows good correlations (r < -0.6) with EPAR and HPe in its whole optimal MLT sector. The poor correlations between the eastward electrojet and EPAR and HPe in the MLT sector 1800-2200 might be attributed to the impact of other magnetosphere-ionosphere coupling processes. The sensitivities of the eastward and westward electrojet currents to EPAR are close to 0.06 MA/(mV/m) and -0.12 MA/(mV/m), respectively, and the sensitivities of their central latitudes to EPAR are close to -2.83 Deg/(mV/m) and -2.14 Deg/(mV/m), respectively. The observed auroral electrojet response to the recurrent solar wind forcing provides new opportunities to study the physical processes governing the eastward and westward auroral electrojets.; The IMAGE network magnetic measurements are used to investigate the response of the auroral electrojets to the recurrent high-speed solar wind streams (HSSs) during the extreme solar minimum period of 2008. We first compare the global AU/AL indices with the corresponding IU/IL indices determined from the IMAGE magnetometer chain and find that the local IMAGE chain can better monitor the activity in MLT sectors 1230-2230 for IU and 2230-0630 for IL during 2008. In the optimal MLT sectors, the eastward and westward electrojets and their central latitude reveal clear 9-day periodic variations associated with the recurrent HSSs. For the 9-day perturbations, both the eastward and westward electrojet currents are better correlated with parallel electric field (EPAR) and electron hemispheric power (HPe) than with other forcing parameters. Interestingly, the eastward electrojet shows good correlations (r > 0.6) with EPAR and HPe only in part of its optimal MLT-sector, roughly 1200-1800, while the westward electrojet shows good correlations (r < -0.6) with EPAR and HPe in its whole optimal MLT sector. The poor correlations between the eastward electrojet and EPAR and HPe in the MLT sector 1800-2200 might be attributed to the impact of other magnetosphere-ionosphere coupling processes. The sensitivities of the eastward and westward electrojet currents to EPAR are close to 0.06 MA/(mV/m) and -0.12 MA/(mV/m), respectively, and the sensitivities of their central latitudes to EPAR are close to -2.83 Deg/(mV/m) and -2.14 Deg/(mV/m), respectively. The observed auroral electrojet response to the recurrent solar wind forcing provides new opportunities to study the physical processes governing the eastward and westward auroral electrojets.
Indexed BySCI
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/122/3272
Collection空间科学部
Corresponding AuthorGuo, JP (reprint author), Chinese Acad Sci, SIGMA Weather Grp, State Key Lab Space Weather, Ctr Space Sci & Appl Res, 1 Nanertiao, Beijing 100190, Peoples R China.
Recommended Citation
GB/T 7714
Guo, Jianpeng,Feng, Xueshang,Pulkkinen, T. I.,et al. Auroral electrojets variations caused by recurrent high-speed solar wind streams during the extreme solar minimum of 2008[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2012,117:A04307.
APA Guo, Jianpeng.,Feng, Xueshang.,Pulkkinen, T. I..,Tanskanen, E. I..,Xu, Wenyao.,...&Guo, JP .(2012).Auroral electrojets variations caused by recurrent high-speed solar wind streams during the extreme solar minimum of 2008.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,117,A04307.
MLA Guo, Jianpeng,et al."Auroral electrojets variations caused by recurrent high-speed solar wind streams during the extreme solar minimum of 2008".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 117(2012):A04307.
Files in This Item: Download All
File Name/Size DocType Version Access License
2012117A04307.pdf(1195KB) 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
[Guo, Jianpeng]'s Articles
[Feng, Xueshang]'s Articles
[Pulkkinen, T. I.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Guo, Jianpeng]'s Articles
[Feng, Xueshang]'s Articles
[Pulkkinen, T. I.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Guo, Jianpeng]'s Articles
[Feng, Xueshang]'s Articles
[Pulkkinen, T. I.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2012117A04307.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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