Abstract Details


Name: Bidya Binay Karak
Affiliation: IIT-BHU
Conference ID: TVS202510148
Title: Understanding Long-Term Variations in the Solar Cycle
Authors and Co-Authors:
Abstract Type: Invited by SOC
Abstract: One prominent feature of the solar cycle is its variation from one cycle to another. In this presentation, I will review the dynamo models for the long-term variations of the solar cycle. By long-term variations, we mean the cycle modulations beyond the 11-year periodicity, such as Gnevyshev–Ohl/Even–Odd rule, grand minima, grand maxima, and Gleissberg cycle. After a brief review of the observed data, I will present the dynamo models for the solar cycle. By carefully analyzing the dynamo models and the observed data, I will identify nonlinearities and stochastic processes in the solar dynamo and specify their roles in causing long-term modulations in the solar cycle. We also discuss a few critical issues and their current trends. Finally, I shall end by commenting on the connection with the stellar cycle variations and thus the place of the Sun in the stellar dynamo regime.