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  X-ray and EUV variability and impact during solar minimum: A modeling perspective

Pettit, J., Garcia-Sage, K., Chamberlin, P., Wang, J., Bell, J., Yue, J., Chou, M.-Y., Rowland, D., Kuznetsova, M. (2023): X-ray and EUV variability and impact during solar minimum: A modeling perspective, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-2460

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018293 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018293_2
Genre: Conference Paper

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 Creators:
Pettit, Joshua1, Author
Garcia-Sage, Katherine1, Author
Chamberlin, Phillip1, Author
Wang, Jack1, Author
Bell, Jared1, Author
Yue, Jia1, Author
Chou, Min-Yang1, Author
Rowland, Douglas1, Author
Kuznetsova, Maria1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: Extensive work over the past decades has been focused on high-energy photon impacts during short-timescale events such as solar flares, which occur frequently during solar maximum and its declining phase. The longer timescale impacts of solar irradiance from high-energy photons (x-ray and EUV) on the ionosphere and thermosphere, especially during quiet times such as solar minimum, have been largely ignored. This work investigates a period during solar minimum using state-of-the-art modeling simulations from the Global Ionosphere/Thermosphere Model (GITM) and the Whole Atmosphere Community Climate Model eXtended (WACCMX). For short wavelength forcing, we use the Flare Irradiance Spectral Model version 2 (FISM2), which captures variations at high energies much better than proxies such as F10.7, which is commonly used in modeling studies. Four simulations are performed: two for each model. The first two simulations use the traditional F10.7 radio flux as input for solar irradiance. The second set of simulations incorporate FISM2 at 5-minute temporal resolution using 59 wavelength bins for GITM and 23 wavelength bins for WACCMX. Comparisons are made between the FISM2-driven and F10.7-driven simulations to reveal the importance of including high-resolution solar irradiance at short wavelengths during solar minimum on the simulated upper atmospheric neutral and ion chemistry and dynamics. We select the 2009 timeframe for our studies, which was a remarkably quiet period during solar minimum of solar cycle 24. We validate simulated fields against available satellite observations made by CHAMP and SABER.

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Language(s): eng - English
 Dates: 2023
 Publication Status: Finally published
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-2460
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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