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Auroral electrojets variations caused by recurrent high-speed solar wind streams during the extreme solar minimum of 2008

文献类型：期刊论文

作者Guo, Jianpeng1; Feng, Xueshang1; Pulkkinen, T. I.2; Tanskanen, E. I.3,4; Xu, Wenyao5; Lei, Jiuhou6; Emery, Barbara A.7
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
出版日期2012-04-06
卷号117
ISSN号0148-0227
DOI10.1029/2011JA017458
文献子类Article
英文摘要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.
WOS关键词ELEMENTARY CURRENT SYSTEMS ; SPACED DATA ; IONOSPHERE ; SUBSTORM ; INDEXES ; FIELD
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:000302500100003
出版者AMER GEOPHYSICAL UNION
资助机构National Natural Science Foundation of China(40921063 ; National Natural Science Foundation of China(40921063 ; 973 program(2012CB825601) ; 973 program(2012CB825601) ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; State Oceanic Administration People's Republic of China(201005017) ; State Oceanic Administration People's Republic of China(201005017) ; Finnish Academy projects(108518 ; Finnish Academy projects(108518 ; National Science Foundation ; National Science Foundation ; 40890162 ; 40890162 ; 128632 ; 128632 ; 41031066 ; 41031066 ; 121289) ; 121289) ; 40904049 ; 40904049 ; 41004082 ; 41004082 ; 41174139) ; 41174139) ; National Natural Science Foundation of China(40921063 ; National Natural Science Foundation of China(40921063 ; 973 program(2012CB825601) ; 973 program(2012CB825601) ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; State Oceanic Administration People's Republic of China(201005017) ; State Oceanic Administration People's Republic of China(201005017) ; Finnish Academy projects(108518 ; Finnish Academy projects(108518 ; National Science Foundation ; National Science Foundation ; 40890162 ; 40890162 ; 128632 ; 128632 ; 41031066 ; 41031066 ; 121289) ; 121289) ; 40904049 ; 40904049 ; 41004082 ; 41004082 ; 41174139) ; 41174139) ; National Natural Science Foundation of China(40921063 ; National Natural Science Foundation of China(40921063 ; 973 program(2012CB825601) ; 973 program(2012CB825601) ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; State Oceanic Administration People's Republic of China(201005017) ; State Oceanic Administration People's Republic of China(201005017) ; Finnish Academy projects(108518 ; Finnish Academy projects(108518 ; National Science Foundation ; National Science Foundation ; 40890162 ; 40890162 ; 128632 ; 128632 ; 41031066 ; 41031066 ; 121289) ; 121289) ; 40904049 ; 40904049 ; 41004082 ; 41004082 ; 41174139) ; 41174139) ; National Natural Science Foundation of China(40921063 ; National Natural Science Foundation of China(40921063 ; 973 program(2012CB825601) ; 973 program(2012CB825601) ; Specialized Research Fund for State Key Laboratories ; Specialized Research Fund for State Key Laboratories ; State Oceanic Administration People's Republic of China(201005017) ; State Oceanic Administration People's Republic of China(201005017) ; Finnish Academy projects(108518 ; Finnish Academy projects(108518 ; National Science Foundation ; National Science Foundation ; 40890162 ; 40890162 ; 128632 ; 128632 ; 41031066 ; 41031066 ; 121289) ; 121289) ; 40904049 ; 40904049 ; 41004082 ; 41004082 ; 41174139) ; 41174139)
源URL[http://ir.iggcas.ac.cn/handle/132A11/84384]  
专题中国科学院地质与地球物理研究所
通讯作者Guo, Jianpeng
作者单位1.Chinese Acad Sci, SIGMA Weather Grp, State Key Lab Space Weather, Ctr Space Sci & Appl Res, Beijing 100190, Peoples R China
2.Aalto Univ, Sch Elect Engn, FI-00076 Aalto, Finland
3.Finnish Meteorol Inst, FI-00101 Helsinki, Finland
4.Univ Bergen, Dept Phys & Technol, Bergen, Norway
5.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
6.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Anhui, Peoples R China
7.Natl Ctr Atmospher Res, High Altitude Observ, Boulder, CO 80301 USA
推荐引用方式
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.
APA Guo, Jianpeng.,Feng, Xueshang.,Pulkkinen, T. I..,Tanskanen, E. I..,Xu, Wenyao.,...&Emery, Barbara A..(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.
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).

入库方式： OAI收割

来源：地质与地球物理研究所

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