Storm time current distribution in the inner equatorial magnetosphere: THEMIS observations
文献类型：期刊论文
| 作者 | Yang, Y. Y.1,2; Shen, C.3,4; Dunlop, M.5,6; Rong, Z. J.7; Li, X.8; Angelopoulos, V.9,10; Chen, Z. Q.4; Yan, G. Q.4; Ji, Y.11 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
 |
| 出版日期 | 2016-06-01 |
| 卷号 | 121期号:6页码:5250-5259 |
| DOI | 10.1002/2015JA022145 |
| 文献子类 | Article |
| 英文摘要 | For the first time, the current density distribution in the inner equatorial magnetosphere ranging from 4 to 12 R-E (R-E is the Earth radius, 6371 km) has been obtained by using Time History of Events and Macroscale Interactions during Substorms (THEMIS) (P3, P4, and P5) three point magnetic measurements. This study mainly focuses on the storm events when the constellation of the three THEMIS spacecraft has relatively small separation distance. Two cases with different storm activities are first displayed to illustrate the effectiveness of the method. The inner magnetospheric equatorial current distribution ranging from 4 to 12 R-E is shown through statistical analysis. The features of current density are separately analyzed for the storm main phase and the recovery phase. The statistical study reveals that with increasing radial distance the predominant ring current density reverses from Eastward (below r = 4.8 R-E, where r is the geocentric radial distance) to Westward, but that the distribution behaves differently for the two phases of activity. During the main phase, both the westward and eastward current are enhanced by added signal and are more dynamic so that both radial profile and magnetic local time (MLT) structure is obscured. During the recovery phase, the radial profile of the westward current is smooth and peaks, then falls, between r= 5- 7.5 R-E showing some MLT dependence in this region. Beyond r = 7.5 R-E, the current is lower and nearly constant and shows little MLT variation. The results also suggest that the change from eastward to westward current depends on the storm phase and hence storm activity. |
| WOS关键词 | TERRESTRIAL RING CURRENT ; MAGNETIC-FIELD ; GRADIENT ESTIMATION ; GEOMAGNETIC STORMS ; CURRENT REGION ; CLUSTER ; SPACECRAFT ; EVOLUTION ; PHASE ; MODEL |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000383421100020 |
| 资助机构 | National Natural Science Foundation of China(41231066 ; National Natural Science Foundation of China(41231066 ; Ministry of Science and Technology of China(2011CB811404) ; Ministry of Science and Technology of China(2011CB811404) ; China Postdoctoral Science Foundation(2012 T50132) ; China Postdoctoral Science Foundation(2012 T50132) ; China State Scholarship Fund(201404910456) ; China State Scholarship Fund(201404910456) ; Specialized Research Fund for State Key Laboratories of the CAS ; Specialized Research Fund for State Key Laboratories of the CAS ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; ISSI Team "Field-Aligned Currents: Their Morphology, Evolution, Source Regions and Generators" ; ISSI Team "Field-Aligned Currents: Their Morphology, Evolution, Source Regions and Generators" ; 41204117) ; 41204117) ; National Natural Science Foundation of China(41231066 ; National Natural Science Foundation of China(41231066 ; Ministry of Science and Technology of China(2011CB811404) ; Ministry of Science and Technology of China(2011CB811404) ; China Postdoctoral Science Foundation(2012 T50132) ; China Postdoctoral Science Foundation(2012 T50132) ; China State Scholarship Fund(201404910456) ; China State Scholarship Fund(201404910456) ; Specialized Research Fund for State Key Laboratories of the CAS ; Specialized Research Fund for State Key Laboratories of the CAS ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; ISSI Team "Field-Aligned Currents: Their Morphology, Evolution, Source Regions and Generators" ; ISSI Team "Field-Aligned Currents: Their Morphology, Evolution, Source Regions and Generators" ; 41204117) ; 41204117) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/53357]  |
| 专题 | 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 作者单位 | 1.China Earthquake Adm, Inst Crustal Dynam, Beijing, Peoples R China 2.China Earthquake Adm, Key Lab Crustal Dynam, Beijing, Peoples R China 3.Harbin Inst Technol, Shenzhen, Peoples R China 4.Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China 5.Beihang Univ, Space Sci Inst, Sch Astronaut, Beijing, Peoples R China 6.Rutherford Appleton Lab, Didcot, Oxon, England 7.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 8.Univ Colorado, Atmospher & Space Phys Lab, Campus Box 392, Boulder, CO 80309 USA 9.Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA 10.Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA |
| 推荐引用方式 GB/T 7714 | Yang, Y. Y.,Shen, C.,Dunlop, M.,et al. Storm time current distribution in the inner equatorial magnetosphere: THEMIS observations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2016,121(6):5250-5259. |
| APA | Yang, Y. Y..,Shen, C..,Dunlop, M..,Rong, Z. J..,Li, X..,...&Ji, Y..(2016).Storm time current distribution in the inner equatorial magnetosphere: THEMIS observations.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,121(6),5250-5259. |
| MLA | Yang, Y. Y.,et al."Storm time current distribution in the inner equatorial magnetosphere: THEMIS observations".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 121.6(2016):5250-5259. |
入库方式： OAI收割
来源：地质与地球物理研究所
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