文章基本信息

标题：The Study of Daytime Ionospheric E-Region Radar Echoes Simultaneously Observed by Qujing VHF Radar and Multi-Ionosondes
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作者：Yunzhou Zhu ; Qiong Tang ; Zhongxin Deng 等
期刊名称：Space Weather
印刷版ISSN：1542-7390
出版年度：2022
卷号：20
期号：6
页码：1-13
DOI：10.1029/2021SW002998
语种：English
出版社：American Geophysical Union
摘要：In this work, the daytime E-region field-aligned irregularities (FAIs) observed by the Qujing (geographic 25.64°N, 103.70°E) Very High Frequency coherent backscatter radar was reported. The range spread and enhanced sporadic-E layer (Es) during the same period of the unusual radar echoes were separately observed by two ionosondes located at the Huize and Qujing. The Huize (geographic 26.51°N, 103.61°E) ionosonde was roughly located underneath the radar scattering volume which measured enhanced and range spread Es layer during this period of the unusual radar echoes, indicating that the daytime E-region FAIs were closely related to the localized density gradient that embedded within the coordinated Es layer. Fengyun-4A (FY-4A) satellite data show that a strong convective activity accompanied by gravity waves occurred near the radar scattering volume region. As a result, we proposed that the gravity waves driven by the convective activity in the lower atmosphere can modulate the Es layers and then generate the daytime FAIs through the polarization process.