| Autor: |
Magnus F Ivarsen, Jean-Pierre St-Maurice, Glenn C Hussey, Andres Spicher, Yaqi Jin, Adam Lozinsky, Lindsay V Goodwin, Draven Galeschuk, Jaeheung Park, Lasse B N Clausen |
| Rok vydání: |
2023 |
| DOI: |
10.21203/rs.3.rs-2817757/v1 |
| Popis: |
The ionosphere, Earth’s space environment, exhibits widespread turbulent structuring, or plasma irregularities, visualized by the auroral displays seen in Earth’s polar regions. Such plasma irregularities have been studied for decades, but plasma turbulence remains an elusive phenomenon. We combine scale-dependent measurements from a ground-based radar with satellite observations to characterize small-scale irregularities simultaneously in the bottomside and topside ionosphere and perform a statistical analysis on an aggregate from both instruments over time. We demonstrate the clear mapping of information vertically along the ionospheric altitude column, for field-perpendicular wavelengths down to 1.5 km. Our results paint a picture of the northern hemisphere high-latitude ionosphere as a turbulent system that is in a constant state of growth and decay; energy is being constantly injected and dissipated as the system is continuously attempting an accelerated return to equilibrium. We connect the widespread irregularity dissipation to Pedersen conductance in the E-region, and discuss the similarities between irregularities found in the polar cap and in the auroral region in that context. Due to this intimate relationship between high-latitude irregularities and E-region ionization, we suggest that the electrodynamics of a conducting E-region should be considered when discussing plasma turbulence at high latitudes. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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