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Solar wind impacts on growth phase duration and substorm intensity: A statistical approach
H. Li; C. Wang; Z. Peng; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationJournal of Geophysical Research: Space Physics
2013
Volume118Issue:7Pages:4270-4278
ISSN2169-9402
Language英语
KeywordSubstorm Growth Phase Duration Substorm Intensity Solar Wind Conditions Imf Southward Turning
AbstractA statistical survey of 379 interplanetary magnetic field (IMF) southward turning events during the time period from 1995 to 2011 is performed to study the impact of solar wind conditions on the substorm growth phase duration and intensity. Substorm growth phase persists from several minutes up to 2–3 h, and its duration is mainly controlled by solar wind conditions. The larger dayside reconnection E-field and solar wind speed are, the shorter the growth phase will be. The lower limits of solar wind reconnection E-field and bulk speed for substorm occurrence are found to be 0.6 mV/m and 280 km/s, respectively. Similarly, the substorm intensity is linearly correlated to the dayside reconnection E-field. However, it seems to be independent of the amount of dayside geomagnetic flux reconnected and solar wind energy entered into the magnetosphere during the growth phase. Furthermore, all the events are divided into three groups for different averages of dayside reconnection E-field during the growth phase (): (1) 0.0 mV/m; (2) mV/m; and (3) mV/m, and the geometric means of growth phase duration and auroral power maximum for these three groups are 91 min, 62 min, 32 min, and 35 GW, 51 GW, 74 GW, respectively.
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/122/1524
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
H. Li,C. Wang,Z. Peng,et al. Solar wind impacts on growth phase duration and substorm intensity: A statistical approach[J]. Journal of Geophysical Research: Space Physics,2013,118(7):4270-4278.
APA H. Li,C. Wang,Z. Peng,&北京8701信箱.(2013).Solar wind impacts on growth phase duration and substorm intensity: A statistical approach.Journal of Geophysical Research: Space Physics,118(7),4270-4278.
MLA H. Li,et al."Solar wind impacts on growth phase duration and substorm intensity: A statistical approach".Journal of Geophysical Research: Space Physics 118.7(2013):4270-4278.
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