低纬海南地区电离层变化和扰动特性研究-空间物理学专业论文.docxVIP

低纬(海南)地区电离层交纯靶扰动特性研究Characteristics 低纬(海南)地区电离层交纯靶扰动特性研究 Characteristics of variation and disturbances in ionosphere in low latitude(Hainan)region Wang Xiao(Space Physics) Directed by Shi Jiankui and Xiao Zuo Characteristics of variation and disturbances in 10w—latitude ionosphere were investigated based on the data observed攮Hainan under different magnetic activities and solar activities including variations and disturbances of parameters in different ionospheric layers。behaviors of plasma drift and a comparison with other low。latitude ionospheric station．讹e disturbance propagations from high to low latitude region during magnetic storm time ale also investigated with analyzing the data obtained from the East—Asian high—middle latitude stations．Especially,the ionospheric electric ￡ield in Halnan was studied according to the{onospheric plasma drift velocity by removing the neural wind effect．Several influence factors to result plasma drift in Hainan were analyzed。 In this paper the characteristics of ionospheric parameters variation were analyzed systematically and some new results in storm—time such as seasonal behaviors were obtained；it is the first time to investigate the ionospheric drift behavior in珏ainan and some new results was obtained．the relationships between each two plasma drift velocity components in storm time in Hainan were foand and the electric filed variation in Hainan ionosphere also was obtained；the results also show that there are big differences of the ionosphere parameters B0 and B1 obtained from the data with that obtained from the IRl．2001 applied for Hainan；a new phenomena was found during a strong magnetic storm,that a layer with very strong electron density and density grad was found during the recovery phase of the storm， its horizontal scale is beyOnd lOOkm and temporal scale is about 2 hours，this phenomena repeated 3 times continuously．A type of negative disturbance in high and low latitude but positive disturbance in East-Asia also has