| Publikationstyp: | Konferenz: Sonstiges |
| Art der Begutachtung: | Peer review (Abstract) |
| Titel: | Stochastic resonance could explain recurrence of Grand Minima |
| Autor/-in: | Albert, Carlo Ulzega, Simone |
| et. al: | No |
| DOI: | 10.5194/egusphere-egu2020-15185 |
| Angaben zur Konferenz: | EGU General Assembly 2020, online, 4-8 May 2020 |
| Erscheinungsdatum: | 2020 |
| Sprache: | Englisch |
| Schlagwörter: | Solar physics; Stochastic resonance; Stochastic delay-ODE model |
| Fachgebiet (DDC): | 500: Naturwissenschaften 510: Mathematik |
| Zusammenfassung: | Proxies of solar activity have revealed repeated Grand Minima that occur with a certain regularity associated with the well-known Gleissberg and Süss/deVries cycles. These and other prominent cycles in the spectrum of solar activity are also seen in the spectrum of the planetary torque exerted on the solar tachocline, which has revived the hypothesis of a planetary influence on solar activity. It is not clear, however, how the extremely weak planetary forcing could influence the solar magnetic activity. Here, we suggest that stochastic resonance could explain the necessary amplification of the forcing and provide numerical evidence from stochastic time-delayed dynamo models. If the intrinsic noise of the solar dynamo allows for a frequent switching between active and quiescent stable states, tiny periodic forcings can be greatly amplified, provided the dynamo is poised close to a critical point. Such a forcing could be caused by a tidal modulation of the minimal magnetic field required for flux-tube buoyancy. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/25629 |
| Volltext Version: | Publizierte Version |
| Lizenz (gemäss Verlagsvertrag): | CC BY 4.0: Namensnennung 4.0 International |
| Departement: | Life Sciences und Facility Management |
| Organisationseinheit: | Institut für Computational Life Sciences (ICLS) |
| Publiziert im Rahmen des ZHAW-Projekts: | BISTOM - Bayesian Inference with Stochastic Models |
| Enthalten in den Sammlungen: | Publikationen Life Sciences und Facility Management |
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Albert, C., & Ulzega, S. (2020). Stochastic resonance could explain recurrence of Grand Minima. EGU General Assembly 2020, Online, 4-8 May 2020. https://doi.org/10.5194/egusphere-egu2020-15185
Albert, C. and Ulzega, S. (2020) ‘Stochastic resonance could explain recurrence of Grand Minima’, in EGU General Assembly 2020, online, 4-8 May 2020. Available at: https://doi.org/10.5194/egusphere-egu2020-15185.
C. Albert and S. Ulzega, “Stochastic resonance could explain recurrence of Grand Minima,” in EGU General Assembly 2020, online, 4-8 May 2020, 2020. doi: 10.5194/egusphere-egu2020-15185.
ALBERT, Carlo und Simone ULZEGA, 2020. Stochastic resonance could explain recurrence of Grand Minima. In: EGU General Assembly 2020, online, 4-8 May 2020. Conference presentation. 2020
Albert, Carlo, and Simone Ulzega. 2020. “Stochastic Resonance Could Explain Recurrence of Grand Minima.” Conference presentation. In EGU General Assembly 2020, Online, 4-8 May 2020. https://doi.org/10.5194/egusphere-egu2020-15185.
Albert, Carlo, and Simone Ulzega. “Stochastic Resonance Could Explain Recurrence of Grand Minima.” EGU General Assembly 2020, Online, 4-8 May 2020, 2020, https://doi.org/10.5194/egusphere-egu2020-15185.
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