Publication type: Conference other
Type of review: Not specified
Title: Can stochastic resonance explain the amplification of planetary tidal forcing?
Authors: Albert, Carlo
Ulzega, Simone
et. al: No
Conference details: 4th Solar Dynamo Thinkshop, Rome, Italy, 25 - 26 November 2019
Issue Date: 2019
Language: English
Subject (DDC): 500: Natural sciences
510: Mathematics
Abstract: Repeated Grand Minima revealed by proxies of solar activity suggest that the Sun alternates between two stable states, a quiescent and an active one. If the intrinsic noise of the solar dynamo allows for a frequent switching between these stable states, a tiny periodic modulation of the corresponding transition probabilities can be greatly amplified – a phenomenon known as stochastic resonance. It is well-known that Babcock-Leighton-type dynamo models can be reduced to a stochastic iterative map model capable of capturing the essential low-frequency features of the solar dynamo mechanism. In such a simplified framework, we give numerical evidence that a tiny tidal modulation of the minimal magnetic field required for flux-tube buoyancy is greatly amplified by the dynamo, provided that it operates close enough to a critical bifurcation point. Inference with more refined dynamo models is required to test this “criticality hypothesis”.
Fulltext version: Published version
License (according to publishing contract): Not specified
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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