|Title:||Can stochastic resonance explain the amplification of planetary tidal forcing?|
|Authors :||Albert, Carlo|
|et. al :||No|
|Conference details:||4th Solar Dynamo Thinkshop, Rome, Italy, 25 - 26 November 2019|
|License (according to publishing contract) :||Not specified|
|Type of review:||Not specified|
|Subject (DDC) :||500: Natural sciences and 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”.|
|Departement:||Life Sciences and Facility Management|
|Organisational Unit:||Institute of Applied Simulation (IAS)|
|Publication type:||Conference other|
|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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