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- W3009896579 abstract "Predictions of solar cycle 24 obtained from the advection-dominated and diffusion-dominated kinematic dynamo model are different if we consider only the Babcock-Leighton mechanism as a poloidal field generation source term. Yeates et al (2008) argue that the discrepancy between the results is due to the different memory of solar dynamo for advection- and diffusion-dominated solar convection zones. We aim to investigate the discrepancy between the solar cycle memory obtained from advection-dominated and diffusion-dominated kinematic solar dynamo models. Specifically, we want to investigate whether another poloidal field generation mechanism, namely, Parker's mean-field alpha effect has any impact on the memory of the solar cycle. We used a kinematic flux transport solar dynamo model where poloidal field generation takes place due to both the Babcock-Leighton mechanism and mean-field alpha effect. The addition of a mean-field alpha effect reduces the memory of the Babcock Leighton solar dynamo to within one cycle for both advection-and diffusion-dominated dynamo regimes. Our result provides an alternative resolution to the discrepancy in memory of advection- and diffusion-dominated kinematic dynamo models. We also find a moderate decrease in the correlation between the radial flux at the cycle minima and the toroidal flux at the maxima of the next cycle with the increase of mean-field alpha amplitude. We confirm the conclusions of Yeates et al (2008) and Karak and Nandy (2012) regarding the short, one-cycle memory of the solar cycle. We establish that the mean-field alpha effect impacts the memory of the solar cycle. However, correlation coefficients are highly dependent on the assumed amplitude and fluctuation levels of the mean-field alpha" @default.
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- W3009896579 date "2020-03-05" @default.
- W3009896579 modified "2023-10-16" @default.
- W3009896579 title "Mean-Field Alpha Effect impacts Memory of the Solar Cycle" @default.
- W3009896579 hasPublicationYear "2020" @default.
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