Seasonal variations of the ionospheric effects of geomagnetic storms at different latitudes of East Asia

	Seasonal variations of the ionospheric effects of geomagnetic storms at different latitudes of East Asia
	Pirog, O. M.; Polekh, N. M.; Zherebtsov, G. A.; Smirnov, V. F.; Shi, J. K.; Wang, X.
	2006
会议名称	35th COSPAR Scientific Assembly
会议日期	2006
会议地点	Paris, FRANCE
关键词	ionospheric storm geomagnetic disturbance critical frequencies F2-layer main ionospheric trough
页码	1075-1080
英文摘要	We present the results derived from investigating the ionospheric effects of geomagnetic storm based on analyzing the data obtained at ionospheric stations located at different latitudes in the longitudinal sector of 90-130 degrees E. There are considered geomagnetic storms of different intensities in the period from May, 2003 till March, 2004. During this period 15 storms are selected, which could be separated into different seasons. Our analysis of geomagnetic storms during different seasons suggests the following conclusions. (1) In summer during the initial positive phase of storms the positive disturbance in foF2 with the amplitude of up to 25% is observed at high latitudes. Then the disturbances are negative up to the end of the storm both at high and middle latitudes. The disturbance variations are similar. At low latitudes there are marked both positive and negative disturbances. (2) In winter the daytime disturbances are positive in the beginning of the storm at all stations under investigation. During the early recovery phase they are negative at high and positive at middle latitudes. The night disturbances are positive at high and negative at middle latitudes. At low latitudes the disturbances are positive both in daytime and at night during all storms. The disturbances change their sign near 30 degrees geomagnetic latitude. (3) The equinox ionospheric variations during the storm are similar to those observed in summer: there are observed positive disturbances in the beginning of the storm and negative disturbances during the main and recovery phases both at high and middle latitudes. At low latitudes they are both positive and negative with high amplitudes. (4) In Hainan the intensive oscillations of foF2 are observed during the main phase of every storm.
收录类别	CPCI
会议录	Advances in specifying plasma temperatures and ion composition in the ionosphere
会议录出版者	Elsevier Science Ltd
会议录出版地	OXFORD
学科主题	空间物理
语种	英语
ISBN号	0273-1177
内容类型	会议论文
源URL	[http://ir.cssar.ac.cn/handle/122/921]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Pirog, O. M.,Polekh, N. M.,Zherebtsov, G. A.,et al. Seasonal variations of the ionospheric effects of geomagnetic storms at different latitudes of East Asia[C]. 见:35th COSPAR Scientific Assembly. Paris, FRANCE. 2006.