EGU23-13452, updated on 18 Dec 2023
https://doi.org/10.5194/egusphere-egu23-13452
EGU General Assembly 2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Global simulation of geospace electrons: eVlasiator in 3D

Markku Alho1, Markus Battarbee1, Leo Kotipalo1, Maxime Grandin1, Yann Pfau-Kempf1, Urs Ganse1, Giulia Cozzani1, Maarja Bussov1, Evgenii Gordeev1, Konstantinos Horaites1, Fasil Tesema Kebede1, Konstantinos Papadakis1, Jonas Suni1, Vertti Tarvus1, Lucile Turc1, Ivan Zaitsev1, Hongyang Zhou1, and Minna Palmroth1,2
Markku Alho et al.
  • 1University of Helsinki, Department of Physics, Helsingin yliopisto, Finland (markku.alho@helsinki.fi)
  • 2Finnish Meteorological Institute, Helsinki, Finland

Models of the geospace plasma environment have been proceeding towards more realistic descriptions of the solar wind—magnetosphere interaction, from gas-dynamic to MHD and hybrid ion-kinetic models such as the state-of-the-art Vlasiator model. Advances in computational capabilities have enabled global simulations of detailed physics, with some inroads to electron physics made with eVlasiator, specifically, in a meridional 2D+3V simulation.

In this work we present preliminary results from eVlasiator, an offshoot of the Vlasiator model, showing results from a global 3D+3V kinetic electron geospace simulation. Previous work in a spatially 2D environment has shown, despite truncation of some electron physics and use of ion-scale spatial resolution, that realistic electron distribution functions are obtainable within the magnetosphere. This work examines the differences between the spatially 2D and the new spatially 3D results, and describe these in relation to MMS observations. Electron precipitation to the upper atmosphere from these velocity distributions is estimated.

How to cite: Alho, M., Battarbee, M., Kotipalo, L., Grandin, M., Pfau-Kempf, Y., Ganse, U., Cozzani, G., Bussov, M., Gordeev, E., Horaites, K., Kebede, F. T., Papadakis, K., Suni, J., Tarvus, V., Turc, L., Zaitsev, I., Zhou, H., and Palmroth, M.: Global simulation of geospace electrons: eVlasiator in 3D, EGU General Assembly 2023, Vienna, Austria, 23–28 Apr 2023, EGU23-13452, https://doi.org/10.5194/egusphere-egu23-13452, 2023.