Six-dimensional view of Earth’s magnetosphere with the Vlasiator simulation

Turc, Lucile; Palmroth, Minna; Grandin, Maxime; Horaites, Konstantinos; Alho, Markku; Battarbee, Markus; Bussov, Maarja; Cozzani, Giulia; Dubart, Maxime; Ganse, Urs; Gordeev, Evgenii; Papadakis, Konstantinos; Pfau-Kempf, Yann; Suni, Jonas; Tarvus, Vertti; Tesema, Fasil; Zaitsev, Ivan; Zhou, Hongyang

doi:10.57757/IUGG23-2624

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Six-dimensional view of Earth’s magnetosphere with the Vlasiator simulation

Authors

Turc, Lucile
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Palmroth, Minna
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Grandin, Maxime
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Horaites, Konstantinos
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Alho, Markku
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Battarbee, Markus
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Bussov, Maarja
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Cozzani, Giulia
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Dubart, Maxime
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Ganse, Urs
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Gordeev, Evgenii
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Papadakis, Konstantinos
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Pfau-Kempf, Yann
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Suni, Jonas
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Tarvus, Vertti
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Tesema, Fasil
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zaitsev, Ivan
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zhou, Hongyang
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Turc, L., Palmroth, M., Grandin, M., Horaites, K., Alho, M., Battarbee, M., Bussov, M., Cozzani, G., Dubart, M., Ganse, U., Gordeev, E., Papadakis, K., Pfau-Kempf, Y., Suni, J., Tarvus, V., Tesema, F., Zaitsev, I., Zhou, H. (2023): Six-dimensional view of Earth’s magnetosphere with the Vlasiator simulation, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2624

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5019270

Abstract

Vlasiator is a hybrid-Vlasov model designed for global simulations of Earth's magnetosphere. In the hybrid-Vlasov approach, ions are described as velocity distribution functions and electrons are a charge-neutralising fluid. This provides a self-consistent description of ion dynamics in the global magnetospheric context. Vlasiator simulations have been at first confined to two dimensions in ordinary space (2D) and three in velocity space (3V), due to their high computational cost. The recent implementation of adaptive mesh refinement now makes it possible to run 6D (3D-3V) global simulations of Earth's magnetosphere. Here we present an overview of recent results obtained with these new 6D simulations, pertaining to magnetotail dynamics, magnetopause motion, and particle precipitation into the ionosphere. The runs are carried out with a purely southward interplanetary magnetic field, which is conducive to dayside and nightside reconnection. On the dayside, we find that cusp proton precipitation is modulated by flux transfer events formed by magnetopause reconnection. In the magnetotail, the global simulation reveals the interplay between instabilities and reconnection, and their combined role in global magnetotail reconfiguration. We also study the motion of the magnetopause in response to an enhancement in the solar wind dynamic pressure.