电离层随太阳活动变化的特征研究

摘要：

It is well established that solar X-rays and extreme ultraviolet(EUV) radiations are mainly responsible for the formation of the middle-and low-latitude ionosphere via ionizing the upper atmosphere.These solar radiations are known to have different period variations(e.G.，Lundstedt et al.，2005)，especially the well-known solar cycle variations.As a result，many parameters of the ionosphere are subjected to solar activity effects as well as diurnal，seasonal，and spatial variations.Observations indicate that，parameters of the Earth”s ionosphere，such as the critical frequency (foF2)，the peak electron density of the F region(NmF2)，and the total electron content(TEC)，are strongly controlled by solar activity in a rather complicated way(e.G.，Adler et al.，1997；Balan et al.，1994，1996；Bilitza，2000；Huang and Cheng，1995；Kane，1992，2003；Kouris et al.，1998；Kuznetsov et al.，1998；Lei et al.，2005；Liu et al.，2003；Liu et al.，2004a，2004b，2006；Mikhailov and Mikhailov，1995a，b；Pancheva and Mukhtarov，1998；Rao and Rao，1969；Richards，2001；Richards et al.，1994b；Rishbeth，1993；Sethi et al.，2002；Sojka et al.，2006；Su et al.，1999).Considerable progress has been made in understanding the solar activity effects of the ionospheric parameters.In this brief report，we will focus on four points：(1)Solar proxies；(2)solar activity effects of ionospheric parameters，such as NmF2，hmF2 and TEC；(3)solar activity effects of topside plasma density and compositions；and (4) the ionosphere under extreme conditions.

关键词： 电离层 太阳活动 太阳辐射

作者: 刘立波 万卫星

作者单位: 中国科学院地质与地球物理研究所

会议类型: 国内会议

会议名称: 2007年中国气象学会年会

会议地点: 广州

会议语种:中文

页码: 12

在线出版日期: 2007-11-22（万方平台首次上网日期，不代表论文的发表时间）