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Chinese Journal of Space Science ›› 2019, Vol. 39 ›› Issue (2): 178-185.doi: 10.11728/cjss2019.02.178

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Thermospheric Wind over Chinese Yellow River Station and Tromso during Auroral Substorm

WU Pengju, ZHANG Yange, AI Yong   

  1. School of Electronic Information, Wuhan University, Wuhan 430072
  • Received:2018-04-17 Revised:2018-06-26 Online:2019-03-15 Published:2019-03-27

Abstract:

The wind detection for the middle and upper atmosphere is of great significance to the study of atmospheric physical processes. In the polar region, atmospheric structure changes more quickly. By the all-sky Fabry-Perot interferometer, the Doppler shift of the airglow can be detected to retrieve the wind velocity at the airglow layer. In this paper, the neutral wind is studied at the OI 557.7 nm oxygen-atom layer in the Arctic Yellow River Station and the Tromso Station during a substorm. The average wind velocity is about 100 m·s-1 in the lower thermosphere. Due to the geomagnetic distribution, the thermospheric wind velocity increases sharply in the polar region. Finally, considering ion drift data, the influence of ion drag and Joule heating on the neutral wind is discussed. The results show that auroral substorm would not only make the wind stronger in the lower thermosphere but also inhibit it. Moreover, the wind velocity is perpendicularly to the auroral arc generally.

Key words: FPI, Thermospheric neutral wind, Auroral substorm, Ion drag, Joule heating

CLC Number: