globalchange  > 气候减缓与适应
DOI: 10.1002/2014GL059941
论文题名:
Development of large-scale Birkeland currents determined from the Active Magnetosphere and Planetary Electrodynamics Response Experiment
作者: Anderson B.J.; Korth H.; Waters C.L.; Green D.L.; Merkin V.G.; Barnes R.J.; Dyrud L.P.
刊名: Geophysical Research Letters
ISSN: 0094-10089
EISSN: 1944-9820
出版年: 2014
卷: 41, 期:9
起始页码: 3017
结束页码: 3025
语种: 英语
英文关键词: Birkeland currents ; dynamics ; substorm ; temporal development
Scopus关键词: Dynamics ; Electrodynamics ; Experiments ; Magnetic fields ; Current distribution ; Interplanetary magnetic fields ; Iridium constellation ; Magnetic field data ; Planetary electrodynamics ; Substorm onset ; Substorms ; Temporal development ; Magnetosphere ; electrodynamics ; iridium ; magnetic field ; magnetopause ; magnetosphere ; solar wind
英文摘要: The Active Magnetosphere and Planetary Electrodynamics Response Experiment uses magnetic field data from the Iridium constellation to derive the global Birkeland current distribution every 10 min. We examine cases in which the interplanetary magnetic field (IMF) rotated from northward to southward resulting in onsets of the Birkeland currents. Dayside Region 1/2 currents, totaling ~25% of the final current, appear within 20 min of the IMF southward turning and remain steady. Onset of nightside currents occurs 40 to 70 min after the dayside currents appear. Thereafter, the currents intensify at dawn, dusk, and on the dayside, yielding a fully formed Region 1/2 system ~30 min after the nightside onset. The results imply that the dayside Birkeland currents are driven by magnetopause reconnection, and the remainder of the system forms as magnetospheric return flows start and progress sunward, ultimately closing the Dungey convection cycle. Key Points Dayside currents, both Regions 1 and 2, form promptly with solar wind forcing The onset of nightside currents, Regions 1 and 2, coincides with substorm onset Most of the current system develops from the nightside after onset © 2014. American Geophysical Union. All Rights Reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84901911722&doi=10.1002%2f2014GL059941&partnerID=40&md5=26f9766277ef3bd3575cce495672e987
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7353
Appears in Collections:气候减缓与适应

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作者单位: Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States

Recommended Citation:
Anderson B.J.,Korth H.,Waters C.L.,et al. Development of large-scale Birkeland currents determined from the Active Magnetosphere and Planetary Electrodynamics Response Experiment[J]. Geophysical Research Letters,2014-01-01,41(9).
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