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  • YuChang Xun, ZhiShan Chen, LiFang Du, HaoRan Zheng, Jing Jiao, ZeLong Wang, ShaoHua Gong, GuoTao Yang. 2024: A statistical study on the correlation between sporadic Ca+ layer and Es in Beijing(40.5°N, 116°E). Earth and Planetary Physics. DOI: 10.26464/epp2024046
    Citation: YuChang Xun, ZhiShan Chen, LiFang Du, HaoRan Zheng, Jing Jiao, ZeLong Wang, ShaoHua Gong, GuoTao Yang. 2024: A statistical study on the correlation between sporadic Ca+ layer and Es in Beijing(40.5°N, 116°E). Earth and Planetary Physics. DOI: 10.26464/epp2024046
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A statistical study on the correlation between sporadic Ca+ layer and Es in Beijing(40.5°N, 116°E)

  • From April 2020 to June 2022, an all-solid-state dual-wavelength narrow-band Ca+ lidar system was deployed for 280 nights with 1797.79 hours of observation data over Beijing (40.41°N, 116.01°E). A total of 286 sporadic Ca+ layers were observed, with a height distribution of 88-120 km, and a density distribution of 5.33-2200 cm-3. Concurrent observation with the ionosonde 28 km away from the lidar shows that the correlation between the sporadic Ca+ layer and the sporadic E layer is 61.89%. Among them, when the sporadic Ca+ layer has a downward phase progression, the correlation is 76.84%. This may be the result of tidal and planetary waves. When the altitude of the Ca+ layer is above 100 km, the correlation is better, about 90%. Additionally, the higher the calcium ion density, the better the correlation with Es. Furthermore, the correlation between the sporadic Ca+ layer and the sporadic E layer is better in summer, at about 90%, which may be due to seasonal changes in metal ions.
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