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Assessing the Performance of EUHFORIA Modeling the Background Solar Wind.

Jürgen Hinterreiter1,2, Jasmina Magdalenic3, Manuela Temmer2

  • 11Space Research Institute, Austrian Academy of Sciences, Graz, Schmiedlstraße 6, 8042 Graz, Austria.

Solar Physics
|December 24, 2019
PubMed
Summary

The EUHFORIA model shows better solar-wind prediction accuracy during low solar activity. Further improvements are needed for high-activity periods and understanding coronal hole influences on space weather forecasting.

Keywords:
Coronal HolesMagnetic fields, ModelsMagnetohydrodynamicsSolar Wind

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Area of Science:

  • Space Weather and Heliophysics
  • Computational Astrophysics
  • Plasma Physics

Background:

  • Accurate space weather prediction is crucial.
  • EUHFORIA (EUropean Heliospheric FORecasting Information Asset) is a new solar-wind model.
  • Initial performance assessment is necessary.

Purpose of the Study:

  • Evaluate the performance of the EUHFORIA 1.0.4 model.
  • Compare model predictions with Advanced Composition Explorer (ACE) in-situ data.
  • Identify limitations in the current model setup.

Main Methods:

  • Modeled background solar wind using default EUHFORIA parameters.
  • Developed a technique to combine daily model runs into continuous time series.
  • Analyzed data from low (2008) and high (2012) solar activity periods.
  • Qualitatively inspected coronal hole characteristics.

Main Results:

  • EUHFORIA showed a better match with ACE data during low solar activity (2008) than high activity (2012).
  • Model performance for solar-wind parameters was variable.
  • Coronal hole characteristics influence fast solar wind modeling.

Conclusions:

  • EUHFORIA shows promise for space weather forecasting, particularly during solar minimum.
  • Model accuracy varies and requires further refinement.
  • Understanding coronal hole dynamics is key to improving solar-wind predictions.