Abstract Magnetohydrodynamic simulations of the Alfvénic magnetosphere‐ionosphere (M‐I) coupling reveal a comprehensive picture of nonlinear development of the feedback instability, demonstrating spontaneous growth of auroral structures of density and current enhancements, vortex formation, turbulence transition, and energy cascade. Turbulent energy spectra consistent with the −5/3 ${-}5/3$‐law and the critical balance are self‐organized in the feedback M‐I coupling with ionospheric density change. Simultaneously, field‐aligned current and vorticity fluctuations in the auroral ionosphere show different power laws in consistent with observations. The growth of feedback instability and the turbulent energy cascade transfer the kinetic and magnetic energy from a large magnetospheric convection scale to a small dissipation scale.
Observations from the Little Bunker
Last updated: November 30, 2025 04:25 AM
Atmospheric CO₂
426.8 ppm
+18.1
ppm/year
Atmospheric CH₄
1927.61 ppb
+2.73
ppb/year
Global Temperature
+1.48 °C
Peak: +1.73°C
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8.1 billion
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