Speaker
Description
Energetic particle precipitation (EPP) into the atmosphere can influence the chemical composition from the upper stratosphere to the lower thermosphere. The impact of precipitated relativistic electrons from the radiation belt on atmospheric chemistry and dynamics remain unresolved. In this study, we use the VERB-4D code to simulate radiation belt electron dynamics during geomagnetic storms, incorporating wave-particle interactions with chorus, hiss, and EMIC waves. Special attention is given to MeV electrons due to their rapid scattering into the atmosphere. We compute the global distribution of MeV electron precipitation and investigate the relative contributions of Earth’s dipole versus non-dipole magnetic field structures. Model results are compared against Low Earth Orbit (LEO) satellite observations for validation. The simulated MeV precipitating fluxes are then used to estimate ionization rates in the upper atmosphere , providing insight into their role in atmospheric processes.
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