Observations of cross-polar cap neutral winds near 240 km altitude stalling over short distances in the midnight sector near Poker Flat, Alaska, challenge the standard view of high-latitude dynamics.
Journal of Geophysical Research: Space Physics
Posted inResearch Spotlights
Could Low-Altitude Reconnection Power Jupiter’s Polar Aurorae?
Magnetic reconnection events less than 2 Jovian radii above the planet’s cloud tops could explain why Juno has yet to observe a source for Jupiter’s polar aurore.
Posted inResearch Spotlights
Filling the Gaps in the SuperDARN Archive
Researchers present a new pattern-finding technique to better estimate missing data on ionospheric plasma velocities.
Posted inResearch Spotlights
Understanding Aurora Formation with ESA’s Cluster Mission
Over 2 decades, Cluster has shed light on the auroral acceleration region, where parallel electric fields send charged particles on a collision course with the atmosphere.
Posted inResearch Spotlights
Explaining Thermal Tides in the Upper Atmosphere During the 2015 El Niño
Increased tropospheric heating and reduced dissipation combine to explain an anomalously large thermal tide.
Posted inEditors' Highlights
The Auroral E-region is a Source for Ionospheric Scintillation
Observations reveal a connection between auroral particle precipitation and scintillation, indicating that the ionospheric E-region is a key source region for phase scintillation at auroral latitudes.
Posted inEditors' Highlights
Satellite Data Reveal Magnetospause K-H Waves Impact Auroras
Analysis of multiple satellite data has revealed a striking connection between K-H waves on the magnetopause, surface waves in the hot zone near the plasmapause, and auroral undulations.
Posted inResearch Spotlights
A New Approach to Characterizing Space Plasmas
When plasma particle velocity distributions have multiple, distinct parts, treating each as a separate beam may yield more intuitive results.
![Two plots showing percent changes in TIME-GCM zonally averaged [O+] and [H+] as a function of latitude and altitude in the Northern Hemisphere between the “disturbed” and “pre-disturbance” time periods in 2012–2013](https://i0.wp.com/eos.org/wp-content/uploads/2020/12/2020JA028331-Figure-12-top-row-with-legend-sized-for-Eos.png?resize=820%2C615&ssl=1)
Posted inEditors' Highlights
Stratospheric Weather Impacts Light Species at Great Heights
Sudden stratospheric warmings in the high latitude wintertime can drive changes in light species (H, He and O) all the way though the thermosphere, likely influencing ion densities in the exosphere.
Posted inResearch Spotlights
Drivers of Upper Atmosphere Climate Change
New research confirms the influence of carbon dioxide on long-term temperature trends in the upper atmosphere, but changes in Earth’s magnetic field also play a key role.