摘要
本文利用通量管积分方法,对磁南北半球分别沿磁力线积分,研究背景电离层南-北半球不对称以及中性风场和磁偏角随经度的变化对广义瑞利-泰勒不稳定性和电离层不规则结构生成和发展的影响.结果表明,通量管积分广义瑞利-泰勒不稳定性线性增长率存在显著的半球不对称,南北半球不对称的中性风场是导致电离层不规则结构呈南北分布不对称的重要因素;随经度变化的中性风场和磁偏角对瑞利-泰勒不稳定性的经度变化有重要影响,它们可能是导致不规则结构出现率经度变化的主要控制因素.
The effects of south-north hemispheric asymmetry of background ionosphere and the neutral wind and declination variations with longitudes on the development and evolution of generalized Rayleigh-Taylor instability are studied,using the method of flux-tube integration in geomagnetic north-south hemispheres independently.The results indicate that the flux-tube integrated linear growth rate of generalized Rayleigh-Taylor instability shows significant south-north asymmetry,the hemispherical-asymmetric neutral wind may be a key factor for the south-north asymmetric distribution of ionospheric irregularities,and the neutral wind and the declination varying with longitudes have important impacts on the longitudinal variation of Rayleigh-Taylor instability,they could be the major control factors to cause the longitudinal effects of ionospheric irregularities.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
2012年第4期1078-1087,共10页
Chinese Journal of Geophysics
基金
国家自然科学基金项目(40874085
41004071)资助
关键词
通量管瑞利-泰勒不稳定性
中性风
磁偏角
半球不对称
经度变化
Flux-tube Rayleigh-Taylor instability
Neutral wind
Declination
Hemispheric asymmetry
Longitudinal variation
