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Upward propagation of lightning-generated whistler waves into the radiation belts

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Abstract

Lightning-generated whistler (LGW) waves which induce energetic electron precipitation provide an important coupling between the ionosphere and radiation belts. Using the ray-tracing technique, we examine the propagation behaviour of LGW waves and show that they can travel upward into the radiation belts during higher geomagnetic activities due to the plasmapause inward compression, particularly in cases of lower wave frequencies, lower wave normal angles and azimuthal angles. Both perpendicular and parallel group velocities of LGW waves remain in relatively small values inside the plasmasphere but change rapidly to high values outside the plasmasphere. The launching latitude increases with increasing LGW wave normal angle. These results here further reveal a detailed picture on how LGW waves escape out of the plasmasphere and onto the radiation belts.

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Authors and Affiliations

  1. School of Physics and Electronic Sciences, Changsha University of Science and Technology, Changsha, 410114, China

    MingYue Guo, QingHua Zhou, FuLiang Xiao, Si Liu, YiHua He & Chang Yang

Authors
  1. MingYue Guo
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  2. QingHua Zhou
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  3. FuLiang Xiao
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  4. Si Liu
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  5. YiHua He
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  6. Chang Yang
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Corresponding author

Correspondence to FuLiang Xiao.

Additional information

This work was supported by the National Natural Science Foundation of China (Grant Nos. 41531072, 41674166, 41774194 & 41804171.

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Guo, M., Zhou, Q., Xiao, F. et al. Upward propagation of lightning-generated whistler waves into the radiation belts. Sci. China Technol. Sci. 63, 243–248 (2020). https://doi.org/10.1007/s11431-018-9486-9

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  • DOI: https://doi.org/10.1007/s11431-018-9486-9

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