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Storming onto the Scene: Implementing new numerical methods into the Global Ionosphere-Thermosphere Model (GITM) simulations of the Halloween Storm

Urheber*innen

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

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

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

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

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

Garcia-Sage,  Katherine
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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

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Zitation

Bell, J., DeJong, A., Robinson, R., Pettit, J., Rowland, D., Garcia-Sage, K., Kepko, L. (2023): Storming onto the Scene: Implementing new numerical methods into the Global Ionosphere-Thermosphere Model (GITM) simulations of the Halloween Storm, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-1787


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017800
Zusammenfassung
This effort is motivated by the need to efficiently capture time-varying neutral and ion densities at multiple scales to support data analysis for the anticipated game-changing multi-point measurements made by the upcoming constellation NASA mission—the Geospace Dynamics Constellation (GDC) mission. To support this effort, examine Global Ionosphere-Themosphere Model (GITM) simulations of the time-varying neutral, ion, and electron densities globally during the Halloween Storms of 2003. First, we perform a GITM simulation of this intense driving using the currently stable version publicly available at https://github.com/aaronjridley/Gitm/. Next, we implement several sequential improvements to the numerical methods for treating ions and global gridding to investigate the impacts on the simulated fields. These changes include: (1) implementation of a new high-latitude Ring-Average to enable efficient high-resolution simulations, (2) implementing new ion solvers that allow for time-varying ionospheric species with individual momentum equations, and (3) a new Finite Volume Approach to the numerical solvers for both neutrals and ions. Finally, we examine the impacts on minor species (I.e., NO) if we permit each species to have its own individual horizontal (Zonal, Meridional) wind for global redistribution. Our focus will be to assess the impacts that these changes have on the high-latitude electron densities and the numerical efficiency of utilizing high resolution (possibly as low as 0.125 by 0.125 latitude vs longitude grids) on the simulated fields.