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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >The Characteristics of Summer Descending Sporadic E Layer Observed With the Ionosondes in the China Region
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The Characteristics of Summer Descending Sporadic E Layer Observed With the Ionosondes in the China Region

机译：夏季降零星的特点与中国的Ionosondes E层观察到地区

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摘要

This work statistically analyzed the characteristics of the summer descending sporadic E layers (Es) recorded at four Chinese ionospheric sounding stations of Sanya (109.4°E, 18.3°N, and I: 24.1°), Wuhan (114.4°E, 30.5°N, and I: 45.5°), Beijing (116.2°E, 40.3°N, and I: 58.7°), Mohe (122.5°E, 52.0°N, and I: 69.6°), and simulated the vertical ion convergence derived from the Horizontal Wind Model (HWM14) for the period from June 1, 2014 to August 31, 2017. Both observations and simulations show that a daytime Es layer starting at ~120 km in the morning descends to ~100 km in the afternoon. In addition, the descending rate of the Es layer has obvious altitude and latitude dependence. The Es layer descends faster (~2.1 km/h) at higher altitudes (above 110 km), and meanwhile, it descends relatively slowly (~1.5 km/h) at low altitudes (below 110 km). The mean descending rate (~1.5–1.8 km/h) of the Es layers gradually increases from Sanya to Mohe. It is undoubtedly that the wind shear convergence nodes controlled by the atmospheric tides can drive the Es layer to move downwards. However, the simulation results in this paper show that the wind shear convergence nodes and the Es layer traces do not overlap completely, especially in the vertical direction, which suggests that wind shear cannot fully explain the details of Es layer evolution. We should pay attention to the combined effect of wind shear and metallic ion density in future research, especially in the details of the evolution of Es layer in the vertical direction.
机译：这个统计分析工作夏季降零星的特征在四名中国记录E层(Es)三亚的电离层探测站(109.4°E,18.3°N,我:24.1°)、武汉(114.4°E, 30.5°N,我:45.5°),北京(116.2°E, 40.3°N,我:58.7°),邻蒙古(122.5°E, 52.0°N,我:69.6°),和模拟垂直离子收敛从横向风模型(HWM14)从2014年6月1日至8月31日,2017年。观测和模拟显示,一个白天Es层从早上~ 120公里是下午~ 100公里。此外,Es层的下降率明显的海拔和纬度的依赖。层下降更快(~ 2.1 km / h)更高海拔(110公里)以上,同时,它下降相对缓慢(~ 1.5 km / h)低下面的海拔(110公里)。率(-1.8 ~ 1.5 km / h)的Es逐渐层增加从三亚到邻蒙古。风切变融合节点控制通过大气潮汐可以驱动层向下移动。本文结果表明,风切变汇聚节点和Es层没有痕迹完全重叠,特别是在垂直方向,这表明风切变不能完全解释Es层进化的细节。我们应该注意的综合效应风切变和金属离子密度的未来的研究,特别是在细节Es层在垂直的方向进化。

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