Phys.org  November 10, 2021 Researchers at the University of Alaska analyzed ground-based remote sensing measurements of thermospheric neutral winds above Alaska, at 240 km altitude to study how space weather affects the well-known large-scale flow that carries winds from the sunlit dayside of the Earth across the polar cap into the night side. This flow feature is typically expected to emerge from the polar cap in the midnight sector and continue blowing equatorward well into sub-auroral latitudes. However, their data showed instances in which the equatorward flow instead stalls over Alaska in an unexpectedly abrupt manner. They found this most […]