Volume 38 Issue 6
Nov.  2018
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Article Navigation >  Chinese Journal of Space Science  > 2018  >  38(6): 871-878
SUN Zhiqiang, FANG Hanxian, WANG Sicheng, MA Jie. Critical Value of Initial Disturbance Wave-number Affecting Rayleigh-Taylor Instability in Equatorial and Low-latitude Ionosphere[J]. Chinese Journal of Space Science, 2018, 38(6): 871-878. doi: 10.11728/cjss2018.06.871
Citation: SUN Zhiqiang, FANG Hanxian, WANG Sicheng, MA Jie. Critical Value of Initial Disturbance Wave-number Affecting Rayleigh-Taylor Instability in Equatorial and Low-latitude Ionosphere[J]. Chinese Journal of Space Science, 2018, 38(6): 871-878. doi: 10.11728/cjss2018.06.871
shu

Critical Value of Initial Disturbance Wave-number Affecting Rayleigh-Taylor Instability in Equatorial and Low-latitude Ionosphere

doi: 10.11728/cjss2018.06.871 cstr: 32142.14.cjss2018.06.871

  • Institute of Meteorology and Oceanography, National University of Defense Technology, Nanjing 211101

  • Received Date: 2017-06-05
  • Rev Recd Date: 2017-12-20
  • Publish Date: 2018-11-15
    Abstract
  • The sufficient condition of Rayleigh-Taylor instability in equatorial ionosphere has been derived by Ref.[1]. In this paper, the sufficient condition is expanded to low-latitude areas of ±30° magnetic latitude. To study how the initial disturbance wave-number affects the generation of plasma bubble, the variations of λmin as initial disturbance wave-number are analysed. According to the dichotomy method, the critical wave-number αc is attained for λmin=1. Moreover, the characteristics of αc with geomagnetic latitudes, longitudes, seasons, solar activities, local times and the horizontal eastern electric filed are analyzed. The main conclusions are as follows. The variations of αc with latitudes, longitudes, seasons, solar activities, and local times are consistent with plasma bubbles and scintillations. The shorter the wave-length is, the easier it would be to generate the Plasma Bubbles (PB). The enhancements of the horizontal eastward electric filed are helpful to initiate PBs. The value of αc is benificial to decide the best disturbed way in the ionospheric artificial modification.

     

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