Properties of Solar Wind Dynamic Pressure Pulses at 1 AU during the Deep Minimum between Solar Cycles 23 and 24

	Properties of Solar Wind Dynamic Pressure Pulses at 1 AU during the Deep Minimum between Solar Cycles 23 and 24
	Xie, Y. Q.; Zuo, P. B.; Feng, X. S.; Zhang, Y.
刊名	SOLAR PHYSICS
	2015
卷号	290 期号:6 页码:1835-1849
关键词	Solar wind dynamic pressure pulse The deep solar minimum Pressure balance structure Large-scale solar wind transient
ISSN号	0038-0938
通讯作者	Zuo, PB (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing, Peoples R China.
英文摘要	Observations during the deep solar minimum between Solar Cycles 23 and 24 offer an opportunity for characterizing the nature of solar wind dynamic pressure pulses (DPPs) under extreme solar activity. In this study, we identify 226 DPPs from July 2008 to June 2009 using an automatic detection algorithm based on high-resolution plasma data from the Wind spacecraft to investigate the features of DPPs during the deep solar minimum. For comparison, the similarities and differences of the statistical characteristics of the DPPs during the deep solar minimum and during the previous solar minimum are also examined. It is found that the number and the occurrence rate of DPPs during the deep solar minimum are only about one-third of those during the previous minimum, which may be attributed to lower solar wind dynamic pressure and weaker dynamic pressure fluctuations. From a statistical perspective, however, no obvious difference is apparent between the other basic DPP properties in the two solar minima, such as the absolute and relative amplitude of the dynamic pressure changes and the durations of the transition regions of DPPs. Other basic properties of the DPPs during the deep solar minimum are as follows: 1) the distribution of the absolute value of the dynamic pressure amplitude change peaks at 1.0 -aEuro parts per thousand 1.5 nPa, 2) the most probable relative pressure changes are 0.2 -aEuro parts per thousand 0.8, 3) DPP durations are broad-peaked between 150 s and 210 s with a mean of about 171 s, 4) 76.7 % of the DPPs can be considered as pressure balance structures, 5) dynamic pressure changes across DPPs are dominated by density changes, 6) specially, during the deep solar minimum, a considerable portion of DPPs, 86.7 %, are associated with large-scale solar wind transients such as interplanetary coronal mass ejections (ICMEs) and stream interaction regions (SIRs).
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/4639]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Xie, Y. Q.,Zuo, P. B.,Feng, X. S.,et al. Properties of Solar Wind Dynamic Pressure Pulses at 1 AU during the Deep Minimum between Solar Cycles 23 and 24[J]. SOLAR PHYSICS,2015,290(6):1835-1849.
APA	Xie, Y. Q.,Zuo, P. B.,Feng, X. S.,&Zhang, Y..(2015).Properties of Solar Wind Dynamic Pressure Pulses at 1 AU during the Deep Minimum between Solar Cycles 23 and 24.SOLAR PHYSICS,290(6),1835-1849.
MLA	Xie, Y. Q.,et al."Properties of Solar Wind Dynamic Pressure Pulses at 1 AU during the Deep Minimum between Solar Cycles 23 and 24".SOLAR PHYSICS 290.6(2015):1835-1849.