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ISSN  2096-3955

CN  10-1502/P

Citation: Cai, B., Xu, Q. C., Hu, X., Cheng, X., Yang, J. F. and Li, W. (2021). Analysis of the correlation between horizontal wind and 11-year solar activity over Langfang, China. Earth Planet. Phys., 5(3), 270–279.

2021, 5(3): 270-279. doi: 10.26464/epp2021029


Analysis of the correlation between horizontal wind and 11-year solar activity over Langfang, China


Key Laboratory of Science and Technology on Environmental Space Situation Awareness, National Space Science Center, Chinese Academy of Sciences, Beijing 100190, China


College of Earth Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: QingChen Xu,

Received Date: 2021-01-25
Web Publishing Date: 2021-04-14

In this study, long term observations of medium frequency (MF) radar at Langfang site (39.4°N, 116.7°E) from 2009 to 2020 have been used to analyze the dependence of the 11-year solar cycle on horizontal winds in the local mesosphere and lower thermosphere (MLT). The results show that the zonal wind is positively correlated with solar activity during spring at 80–84 km, and during summer at 80–82 km; the meridional wind is positively correlated with solar activity during spring at 84–88 km and during summer at 84–90 km. In contrast, the results show no correlation between the horizontal wind and solar activity in autumn and winter. We attempt to explain the correlations in terms of the changes in stratospheric temperature and the net flux of gravity waves during solar activities. In addition, annual and semiannual oscillations of the zonal/meridional wind were found by using the least squares fitting method on daily horizontal winds, which show negative correlations with solar activity at heights of 80–90 km.

Key words: MF radar, MLT, horizontal wind, solar cycle

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Analysis of the correlation between horizontal wind and 11-year solar activity over Langfang, China

Bing Cai, QingChen Xu, Xiong Hu, Xuan Cheng, JunFeng Yang, Wen Li