Solar wind impacts on growth phase duration and substorm intensity: A statistical approach

	Solar wind impacts on growth phase duration and substorm intensity: A statistical approach
	H. Li ; C. Wang ; Z. Peng
刊名	Journal of Geophysical Research: Space Physics
	2013
卷号	118 期号:7 页码:4270-4278
关键词	substorm growth phase duration substorm intensity solar wind conditions IMF southward turning
ISSN号	2169-9402
通讯作者	北京8701信箱
中文摘要	A 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.
学科主题	空间物理
语种	英语
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/1524]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	H. Li,C. Wang,Z. Peng. 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.(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.