Projects per year
Abstract
Simulations of solar phenomena play a vital role in space weather prediction. A critical computational question for automating research workflows in the context of data-driven solar coronal magnetic field simulations is quantifying a simulation’s burn-in time, after which a solar quantity has evolved away from an arbitrary initial condition to a physically more realistic state. A challenge to quantifying simulation burn-in is that underlying solar processes and data, like many physical phenomena, are non-Markovian and exhibit long memory or persistence, and, therefore, their analysis evades standard statistical approaches. In this work, we provide evidence of long memory in the non-periodic variations of solar quantities (including over timescales significantly shorter than previously identified) and demonstrate that magnetofrictional simulations capture the memory structure present in magnetogram data. We also provide an algorithm for the quantitative assessment of simulation burn-in time that can be applied to nonstationary time series with long memory. Our approach is based on time-delayed mutual information, an information-theoretic quantity, and includes a small-sample bias correction.
Original language | English |
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Article number | 88 |
Number of pages | 19 |
Journal | The Astrophysical Journal |
Volume | 979 |
Issue number | 1 |
DOIs | |
Publication status | Published - 20 Jan 2025 |
Keywords
- Solar magnetic fields (1503)
- Solar physics (1476)
- Time series analysis (1916)
- Bootstrap (1906)
- Magnetohydrodynamical simulations (1966)
Fingerprint
Dive into the research topics of 'Persistence and Burn-in in Solar Coronal Magnetic Field Simulations'. Together they form a unique fingerprint.Projects
- 1 Active
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Solar Magnetic Evolution and Complexity: Dundee-Durham consortium (Joint with lead institute Durham University)
Meyer, K. (Investigator)
Science and Technology Facilities Council
1/04/22 → 31/12/25
Project: Research
Activities
- 1 Invited talk
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Quantifying Persistence and Burn-in in Solar Coronal Magnetic Field Simulations
Hall, E. J. (Speaker)
15 May 2024Activity: Talk or presentation types › Invited talk