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|Publication type:||Article in scientific journal|
|Type of review:||Peer review (publication)|
|Title:||Can stochastic resonance explain recurrence of Grand Minima?|
|Published in:||The Astrophysical Journal Letters|
|Publisher / Ed. Institution:||IOP Publishing|
|Subjects:||Solar physics; Stochastic resonance; Stochastic model; Stochastic delayed ODE|
|Subject (DDC):||500: Natural sciences |
|Abstract:||The amplitude of the 11 yr solar cycle is well known to be subject to long-term modulation, including sustained periods of very low activity known as Grand Minima. Stable long-period cycles found in proxies of solar activity have given new momentum to the debate about a possible influence of the tiny planetary tidal forcing. Here, we study the solar cycle by means of a simple zero-dimensional dynamo model, which includes a delay caused by meridional circulation as well as a quenching of the α-effect at toroidal magnetic fields exceeding an upper threshold. Fitting this model to the sunspot record, we find a set of parameters close to the bifurcation point at which two stable oscillatory modes emerge. One mode is a limit cycle resembling normal solar activity including a characteristic kink in the decaying limb of the cycle. The other mode is a weak sub-threshold cycle that could be interpreted as Grand Minimum activity. Adding noise to the model, we show that it exhibits Stochastic Resonance, which means that a weak external modulation can toss the dynamo back and forth between these two modes, whereby the periodicities of the modulation get strongly amplified.|
|Fulltext version:||Published version|
|License (according to publishing contract):||CC BY 4.0: Attribution 4.0 International|
|Departement:||Life Sciences and Facility Management|
|Organisational Unit:||Institute of Computational Life Sciences (ICLS)|
|Published as part of the ZHAW project:||BISTOM - Bayesian Inference with Stochastic Models|
|Appears in collections:||Publikationen Life Sciences und Facility Management|
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|2021_Albert-etal_Stochastic-resonance-recurrence-grand-minima.pdf||1.16 MB||Adobe PDF|
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Albert, C., Ferriz-Mas, A., Gaia, F., & Ulzega, S. (2021). Can stochastic resonance explain recurrence of Grand Minima? The Astrophysical Journal Letters, 916(2), L9. https://doi.org/10.3847/2041-8213/ac0fd6
Albert, C. et al. (2021) ‘Can stochastic resonance explain recurrence of Grand Minima?’, The Astrophysical Journal Letters, 916(2), p. L9. Available at: https://doi.org/10.3847/2041-8213/ac0fd6.
C. Albert, A. Ferriz-Mas, F. Gaia, and S. Ulzega, “Can stochastic resonance explain recurrence of Grand Minima?,” The Astrophysical Journal Letters, vol. 916, no. 2, p. L9, 2021, doi: 10.3847/2041-8213/ac0fd6.
Albert, Carlo, et al. “Can Stochastic Resonance Explain Recurrence of Grand Minima?” The Astrophysical Journal Letters, vol. 916, no. 2, 2021, p. L9, https://doi.org/10.3847/2041-8213/ac0fd6.
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