大气潮汐风场诱导中纬突发E层的观测证据及理论模拟分析  

Observational Evidences and Simulation of Tide Wind Induced Mid-Latitude Sporadic E-Layers

作　　者：左小敏[1] 万卫星[2] 谭辉[3] 

机构地区：[1]中国地质大学数理学院,武汉430074 [2]中国科学院地质与地球研究所 [3]中国舰船研究设计中心电磁兼容性国防科技重点实验室

出　　处：《空间科学学报》2006年第5期346-351,共6页Chinese Journal of Space Science

基　　金：中国科学院创新方向性项目(KZCX3-SW-144);国家重点基础研究规划项目(G2000078407);中国地质大学校优秀青年教师资助计划项目(CUGQNL0308)共同资助

摘　　要：统计分析了中纬突发E层的测高仪数据,给出了潮汐风场诱导Es层的观测证据,证实了大气潮汐风场和突发E层的强烈相关性．另外,依据风剪切理论,从连续性方程出发,并结合运动方程,运用特征线方法求解,模拟了Es层在潮汐风场作用下的形成．模拟结果证实了风剪切理论的合理性及潮汐风场导致突发E层形成的可能性．The present paper deals with both the statistical study and the computer simulation of sporadic E-layers at mid-latitude regions. The Fourier transformation of the foes sequence shows that the observational data have a strong 24 h and 12 h periodic component, which means strong correlation of Es with the atmospheric tides. The sporadic E occurrence has one peak at higher latitudes while has double peaks at lower latitudes, which suggests that the sporadic E occurrence is associated with the diurnal and semi-diurnal tides. The simulation work is based on the continuity equation and momentum equation. Method of characteristic curve is adopted. According to the widely studied wind shear theory, simulation for the convergence of metal ions to form a thin layer induced by the tidal wind has been carried out. In conclusion, the strong correlation between the sporadic E-layers and the tide is confirmed not only from the statistical analysis of observational data but also from the computer numerical simulation work.

关 键 词：中纬突发E层 潮汐风场 金属离子汇聚 

分 类 号：P353[天文地球—空间物理学]