The Simultaneous Observations of Nighttime Ionospheric E Region Irregularities and F Region Medium-Scale Traveling Ionospheric Disturbances in Midlatitude China
The Simultaneous Observations of Nighttime Ionospheric E Region Irregularities and F Region Medium-Scale Traveling Ionospheric Disturbances in Midlatitude China
复制标题
中国中纬度地区夜间电离层E区不规则与F区中尺度移动电离层扰动的同步观测
DOI：
10.1029/2018ja025352
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发表时间：
2018
影响因子：
2.8
通讯作者：
Zhao Zhengyu
中科院分区：
文献类型：
--
作者：
Zhou Chen;Tang Qiong;Huang Fuqing;Liu Yi;Gu Xudong;Lei Jiuhou;Ni Binbin;Zhao Zhengyu
中纬度地区电离层E区和F区的耦合已经研究了几年。本文利用武汉电离层探测仪、武汉甚高频相干散射雷达和蒙城气辉成像仪对中国中纬度地区E区和F区的夜间扰动进行了研究。我们提出了两个案例研究的同时观测的分散的零星E（Es）层，准周期回波的E区域的不规则性，spreadF，和中等规模的旅行电离层扰动。实例研究结果表明，扩散的Es层和E区不规则性可以与F区中尺度电离层行波扰动相联系，或者通过极化电场沿场线沿着映射传播F。通过对2015-2016年武汉电离层和武汉甚高频雷达观测资料的分析，发现扩散Es层、E区不规则体的准周期回波和扩散F在当地夜间重合度较高。我们的结果首次提供了中国中纬度地区的观测证据，支持E区不规则性产生的极化电场可以沿着磁力线映射，并激发F区的电动力学扰动，如Perkins不稳定性的概念。
Coupling of ionosphericEandFregions in the midlatitude region has been studied for a couple of years. In this study, we investigate the nighttime disturbances inEandFregions in midlatitude China region by using Wuhan ionosonde, Wuhan very high frequency coherent scatter radar, and Mengcheng airglow imager. We present two case studies of simultaneous observations of diffuse sporadicE(Es) layers, quasiperiodic echoes ofEregion irregularities, spreadF, and medium‐scale traveling ionospheric disturbances. Results of case studies indicate that diffuseEs layers andEregion irregularities can be associated with theFregion medium‐scale traveling ionospheric disturbances or spreadFthrough polarization electric field mapping along the field lines. We then analyze the data set of Wuhan ionosonde and Wuhan very high frequency radar during 2015–2016 and find that the coincidence of diffuseEs layers, quasiperiodic echoes ofEregion irregularities, and spreadFis high at local nighttime. Our results provide the first observational evidence in midlatitude China region to support the concept that polarization electric field generated in theEregion irregularities could map along the magnetic field lines and excite electrodynamic disturbances inFregion, such as Perkins instability.