Multi-scale Structuring of the Polar Ionosphere by Magnetosphere-Ionosphere Interactions

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Abstract:

14. ABSTRACTThis research used collaborative observations by UHF incoherent scatter radar (ISR), the HF SuperDARN radar network, and wide-angle optical imagers, supported byfirst-principles numerical modeling, to clarify the driving mechanisms and physical consequences of these interactions. Critical new observational evidence has beenprovided by the electronically steerable Resolute Bay Incoherent Scatter Radar (RISR, 74.7N, 94.8W), which has introduced a radically new sensing capability to polarionospheric science. The results of this research include both technical contributions related to the application of phased array ISR in the polar cap, and scientificcontributions arising from the application of these techniques. The major published results may be summarized as follows: 1) Numerical simulation of densities,temperatures, and cross-field plasma flows within density cavities along auroral boundaries has revealed extreme plasma parameters creating sites of instabilities andturbulence[Zettergren et al., 2015]. 2)

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