中纬区长寿命Es层的维持机制

Maintain mechanism of long-life Es layer in mid-latitude area

首届狮子座强流星雨国际联测期间，我们开展了多学科、多手段的狮子座和天龙座强流星雨及其电离效应的综合观测，并结合近半个世纪的（1957～2003年）狮子座、英仙座和天龙座强流星雨及其电离效应等相关资料的综合分析，证实夜间（18：00～06：00）爆发的强流星雨在其爆发的-92h到102h时段内，在大范围同时观测到fbEs异常峰的存在。下述结论亦得到初步证明：fbEs异常峰出现规律，强流星雨和宇宙尘暴的形成机制。文内还对宇宙尘的演化过程，中纬区Es层金属离子的来源和中纬区长寿命Es层的维持机制作了粗浅的讨论。

During the first international joint observation for strong meteor shower, the strong meteor shower of Leonide and Draconids and their effects of ionization is observated by multi-subject and several methods in China. Combining synthetical analysis of Leonids, Perseids and Draconids and their related data from 1957 to 2003, it is found that the occurrence of strong meteor shower in night（18：00-06： 00） may induce the fbEs abnormal peak from -92h to 102h of the burst time of the strong meteor shower. Some concalsions as following is basicaily confirmed, including that the appearing rule of the fbEs abnormal peak, the formation mechanism of the strong meteor shower and the cosmic dust storm. The evalution process of cometary dusts, the metallic ionic source of the Es layer and the maintain mechanism of the long life Es layer in mid-latitude area are also discussed in this paper.