A new prediction method for the arrival time of interplanetary shocks

	A new prediction method for the arrival time of interplanetary shocks
	Feng XS(冯学尚) ; Zhao XH(赵新华)
刊名	Solar Physics
	2006
卷号	238 期号:1 页码:167-186
关键词	coronal mass ejections geomagnetic disturbances 1-au arrival isf method propagation model waves earth plane tests
ISSN号	0038-0938
通讯作者	北京8701信箱
英文摘要	Solar transient activities such as solar flares, disappearing filaments, and coronal mass ejections (CMEs) are solar manifestations of interplanetary (IP) disturbances. Forecasting the arrival time at the near Earth space of the associated interplanetary shocks following these solar disturbances is an important aspect in space weather forecasting because the shock arrival usually marks the geomagnetic storm sudden commencement (SSC) when the IMF Bz component is appropriately southward and/or the solar wind dynamic pressure behind the shock is sufficiently large. Combining the analytical study for the propagation of the blast wave from a point source in a moving, steady-state, medium with variable density (wei, 1982; wei and dryer 1991) with the energy estimation method in the ISPM model (smith and dryer 1990, 1995), we present a new shock propagation model (called SPM below) for predicting the arrival time of interplanetary shocks at Earth. The duration of the X-ray flare, the initial shock speed and the total energy of the transient event are used for predicting the arrival of the associated shocks in our model. Especially, the background speed, i.e., the convection effect of the solar wind is considered in this model. Applying this model to 165 solar events during the periods of January 1979 to October 1989 and February 1997 to August 2002, we found that our model could be practically equivalent to the prevalent models of STOA, ISPM and HAFv.2 in forecasting the shock arrival time. The absolute error in the transit time in our model is not larger than those of the other three models for the same sample events. Also, the prediction test shows that the relative error of our model is <= 10% for 27.88% of all events, <= 30% for 71.52%, and <= 50% for 85.46%, which is comparable to the relative errors of the other models. These results might demonstrate a potential capability of our model in terms of real-time forecasting.
学科主题	空间物理
收录类别	SCI
原文出处	http://www.springerlink.com/content/w2010xl757523n42/fulltext.pdf
语种	英语
内容类型	期刊论文
源URL	[http://ir.cssar.ac.cn/handle/122/1063]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Feng XS,Zhao XH. A new prediction method for the arrival time of interplanetary shocks[J]. Solar Physics,2006,238(1):167-186.
APA	冯学尚,&赵新华.(2006).A new prediction method for the arrival time of interplanetary shocks.Solar Physics,238(1),167-186.
MLA	冯学尚,et al."A new prediction method for the arrival time of interplanetary shocks".Solar Physics 238.1(2006):167-186.