1986年2月特大电离层暴的动力学表现

1986年2月的太阳耀斑爆发导致了强烈的磁暴和电离层暴。 对我国多个台站有关电离层观测记录的分析表明:这次电离层暴呈现出显著的纬度效应,井在武昌、广州等地区形成了明显的“暴中心”。在暴变期间,伴随有大尺度的TID。在某些时段内,F区电子密度剖面产生了特殊的畸变。 对暴变形态特征及其形成机制进行了一些初步讨论。

THE DYNAMIC BEHAVIOR OF F-REGION STORM ON FEBRUARY 1986

The solar flares in February 1986 caused remarkable geomagnetic storm and ionospheric storm.Using the observation data from nine ionosonde stations and three Faraday rotation stations in China, we made some preliminary investigation on the morphology of the ionspheric storm.The variation of the disturbance with latitude during the storm showed apparent regularity. Several "storm centres" appeared at Wuchang and other places. Besides, there were TlD's with a period about three hours adding on the general trend of the main perturbation. The electron density profiles of F layer were distorted severely in the course of the storm, and the key region of distortion was located at about 260 km.The formation mechanism of the present ionospheric storm was discussed.