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  • Fang Wu, Jing Jiao, Guotao Yang, Lifang Du, Zhengkuan Liu, Haoran Zheng, Jixin Guo. 2024: Comparison of low-latitude Na layer by lidars at Hainan, China and São Paulo, Brazil. Earth and Planetary Physics. DOI: 10.26464/epp2024014
    Citation: Fang Wu, Jing Jiao, Guotao Yang, Lifang Du, Zhengkuan Liu, Haoran Zheng, Jixin Guo. 2024: Comparison of low-latitude Na layer by lidars at Hainan, China and São Paulo, Brazil. Earth and Planetary Physics. DOI: 10.26464/epp2024014
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Comparison of low-latitude Na layer by lidars at Hainan, China and São Paulo, Brazil

  • Low-latitude mesosphere and low thermosphere region is complex and highly related with the low-latitude ionosphere. Metallic sodium detected by lidar can act as a tracer for dynamic and chemical processes in this region. In this paper, the sodium layer data from two low-latitude stations in different hemisphere of international meridian project was used. The seasonal variation of sodium layer in low-latitude is conspicuous, it is similar in different hemispheres: the sodium layer density at both stations has a maximum in autumn and a minimum in summer. The maximal Na density over Brazil is higher than that over Haikou. The nocturnal variation of Na density over two stations both have maxima before sunrise. The particularity of Na layer over Brazil may be related with the South Atlantic Magnetic Anomaly (SAMA) or fountain effect. In the future, the low-latitude Na layer data would be additional evidence for the improvement of the low-latitude part of WACCM-Na model.
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