4:00 PM - 4:15 PM
[PEM14-08] Generation of auroral turbulence in the magnetosphere-ionosphere coupling
Keywords:aurora, magnetosphere-ionosphere coupling, turbulence, Alfven waves
Nonlinear saturation of the feedback instability growth has recently been discussed in terms of the secondary instability [2], where the Kelvin-Helmholtz type mode is generated by a sheared ExB flow. Then, one finds transition to turbulence through the M-I coupling [2], providing a theoretical understanding on spontaneous generation of Alfvenic turbulence observed in auroral regions.
[1] T.-H. Watanabe, Phys. Plasmas 17, 022904 (2010).
[2] T.-H. Watanabe, H. Kurata, and S. Maeyama, New J. Phys. 18, 125010 (2016).