Science Seminars

Energetic Electron Precipitation: Magnetospheric Drivers and Atmospheric Impacts​

Speaker: Lauren Blum (LASP)
Date: Thursday, Oct 14, 2021
Time: 4:00 PM
Location: Zoom

Seminar Abstract:

Energetic electron precipitation (EEP) is a critical process both as a loss mechanism for trapped radiation belt particles in Earth’s magnetosphere as well as an energy input to Earth’s atmosphere. The contribution of precipitation loss to the overall dynamics of the radiation belts is still widely debated, including the energy and storm-phase dependence of this process. While EEP has been studied for decades, using various observation platforms including satellites, rockets, balloons, and ground-based instrumentation, numerous questions remain regarding when, where, and how much can occur. Here we will present recent progress in understanding both the properties and drivers of EEP and how these contribute to the overall dynamics of the radiation belts. In particular, we will explore the detailed properties of precipitation events, including spatial and temporal structure, and compare these to various scattering mechanisms and wave drivers. Finally, we will end by highlighting some upcoming efforts, including balloon and CubeSat measurements currently under development, that will help reveal the nature of the interaction of energetic particles with Earth’s atmosphere.​