Home » Kondrashov et al. 2024

Nonlinear Wave-Particle Interaction Effects on Radiation Belt Electron Dynamics in 9 October 2012 Storm

Kondrashov D., A. Y. Drozdov, Y. Shprits, (2024), Nonlinear Wave-Particle Interaction Effects on Radiation Belt Electron Dynamics in 9 October 2012 Storm, J. Geophys. Res. [Space Physics], 129, e2024JA032898, doi:10.1029/2024JA032898, e2024JA032898 2024JA032898

Abstract

Abstract We study the geomagnetic storm of 9 October 2012, where it had been generally accepted that the resulting prominent outer radiation belt electron acceleration throughout the storm is due to whistler-mode chorus waves. This storm has been studied previously by two-dimensional Fokker–Planck numerical simulations with data-driven quasi-linear (QL) diffusion rates. However, possible nonlinear (NL) resonant interaction effects on electron flux dynamics haven't been looked at yet. This study aims to fill this gap by demonstrating that theory-informed rescaling of QL diffusion rates accounting for contributions of NL resonant interactions helps to reproduce better observed increase of electron fluxes by diffusion simulations. We use machine learning, uncertainty quantification (UQ), physics-perturbed ensemble of VERB simulations and Van Allen Probes observations to identify optimal rescaling of quasi-linear diffusion rates.

Authors (sorted by name)

Drozdov Kondrashov Shprits

Journal / Conference

Journal Of Geophysical Research (Space Physics)

Acknowledgments

This research was supported by NSF Grant AGS-2211345 and NASA Grant 80NSSC21K1693. Authors thank Anton Artemyev for help with NL-WPI rescaling and insights. We also would like to express our gratitude to the ISRADYNAMICS 2023 organizers and attendees for their support and helpful discussions.

Grants

80NSSC21K1693 AGS-2211345

Bibtex

@article{https://doi.org/10.1029/2024JA032898,
author = {Kondrashov, D. and Drozdov, A. Y. and Shprits, Y.},
title = {Nonlinear Wave-Particle Interaction Effects on Radiation Belt Electron Dynamics in 9 October 2012 Storm},
journal = {Journal of Geophysical Research: Space Physics},
volume = {129},
number = {9},
pages = {e2024JA032898},
doi = {https://doi.org/10.1029/2024JA032898},
url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2024JA032898},
eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2024JA032898},
note = {e2024JA032898 2024JA032898},
abstract = {Abstract We study the geomagnetic storm of 9 October 2012, where it had been generally accepted that the resulting prominent outer radiation belt electron acceleration throughout the storm is due to whistler-mode chorus waves. This storm has been studied previously by two-dimensional Fokker–Planck numerical simulations with data-driven quasi-linear (QL) diffusion rates. However, possible nonlinear (NL) resonant interaction effects on electron flux dynamics haven't been looked at yet. This study aims to fill this gap by demonstrating that theory-informed rescaling of QL diffusion rates accounting for contributions of NL resonant interactions helps to reproduce better observed increase of electron fluxes by diffusion simulations. We use machine learning, uncertainty quantification (UQ), physics-perturbed ensemble of VERB simulations and Van Allen Probes observations to identify optimal rescaling of quasi-linear diffusion rates.},
year = {2024}
}