The Evolution of Complex Es Observed by Multi Instruments Over Low‐Latitude China,Journal of Geophysical Research: Space Physics

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The Evolution of Complex Es Observed by Multi Instruments Over Low‐Latitude China
Journal of Geophysical Research: Space Physics ( IF 2.6 ) Pub Date : 2020-07-21 , DOI: 10.1029/2019ja027656
Wenjie Sun _{1,

2,

3} , Baiqi Ning _{1,

2,

3} , Lianhuan Hu _{1,

2,

3} , Xinan Yue _{1,

2,

3,

4} , Xiukuan Zhao _{1,

2,

3} , Jiaping Lan ₅ , Zhengping Zhu ₅ , Zhaoguo Huang _{1,

2,

3} , Zhi Wu _{1,

2,

3}

Affiliation

A complex daytime sporadic E (E _s) case with extremely high critical frequency (f _oE _s) was observed over the low latitude of China on 19 May 2018. Simultaneous observational results from two very high frequency (VHF) radars, two ionosondes, and multiple Global Navigation Satellite System total electron content and scintillation receivers are analyzed to investigate the evolution of the complex E _s occurrence, which consisted of a relatively weak ambient E _s layer (f _oE _s < 8 MHz) and band‐like strong E _s structures (f _oE _s > 17 MHz) drifting from higher latitude. The strong E _s structures elongated more than 500 km in the northwest‐southeast direction, drifted southwestward at a speed of ~65 m/s. VHF radar backscatter echoes were generated when the strong E _s structures passed the radar field of view, with different echo patterns due to different radar and antenna configurations. No VHF radar backscatter echo was associated with the ambient E _s layer. The mechanisms responsible for the formations of the ambient E _s layer and band‐like strong E _s structures are addressed and discussed.

更新日期：2020-08-10

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