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Browsing by Author "Karak, B. B"

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Consequences of high effective prandtl number on solar differential rotation and convective velocity

Karak, B. B; Miesch, Mark; Bekki, Y (American Institute of Physics, 2018-04)

Observations suggest that the large-scale convective velocities obtained by solar convection simulations might be over-estimated (convective conundrum). One plausible solution to this could be the small-scale dynamo which ...
Correlation between decay rate and amplitude of solar cycles as revealed from observations and dynamo theory

Hazra, G; Karak, B. B; Banerjee, D; Choudhuri, A. R (Springer, 2015-06)

Using different proxies of solar activity, we have studied the following features of the solar cycle: i) The linear correlation between the amplitude of cycle and its decay rate, ii) the linear correlation between the ...
Double Peaks of the Solar Cycle: An Explanation from a Dynamo Model

Karak, B. B; Mandal, Sudip; Banerjee, D (IOP Publishing, 2018-10-10)

One peculiar feature of the solar cycle that is yet to be understood properly is the frequent occurrence of double peaks (also known as the Gnevyshev peaks). The double peaks, and also multiple peaks and spikes, are often ...
The extended solar cycle: muddying the waters of solar/stellar dynamo modeling or providing crucial observational constraints?

Srivastava, Abhishek K; McIntosh, Scott W; Arge, N; Banerjee, D; Dikpati, Mausumi; Dwivedi, Bhola N; Guhathakurta, Madhulika; Karak, B. B; Leamon, Robert J; Matthew, Shibu K; Munoz-Jaramillo, Andres; Nandy, D; Norton, Aimee; Upton, L; Chatterjee, S; Rakesh, M; Yamini K. Rao; Rahul Yadav (Frontiers, 2018-11-22)

"In 1844 Schwabe discovered that the number of sunspots increased and decreased over a period of about 11 years, that variation became known as the sunspot cycle. Almost eighty years later, Hale described the nature of the ...
Is a Deep One-cell Meridional Circulation Essential for the Flux Transport Solar Dynamo?

Hazra, G; Karak, B. B; Choudhuri, A. R (IOP Publishing, 2014-02-20)

The solar activity cycle is successfully modeled by the flux transport dynamo, in which the meridional circulation of the Sun plays an important role. Most of the kinematic dynamo simulations assume a one-cell structure ...
Latitude Distribution of Sunspots: Analysis Using Sunspot Data and a Dynamo Model

Mandal, Sudip; Karak, B. B; Banerjee, D (2017-12)

In this paper, we explore the evolution of sunspot latitude distribution and explore its relations with the cycle strength. With the progress of the solar cycle, the distributions in two hemispheres from mid-latitudes ...
Long-term variability of the solar cycle in the Babcock-Leighton dynamo framework

Karak, B. B; Miesch, Mark (Cambridge University Press, 2018-02)

We explore the cause of the solar cycle variabilities using a novel 3D Babcock– Leighton dynamo model. In this model, based on the toroidal flux at the base of the convection zone, bipolar magnetic regions (BMRs) are ...
Polar Network Index as a Magnetic Proxy for the Solar Cycle Studies

Priyal, M; Banerjee, D; Karak, B. B; Munoz-Jaramillo, A; Ravindra, B; Choudhuri, A. R; Singh, J (IOP Publishing, 2014-09-20)

The Sun has a polar magnetic field which oscillates with the 11 yr sunspot cycle. This polar magnetic field is an important component of the dynamo process which operates in the solar convection zone and produces the sunspot ...
Recovery from Maunder-like Grand Minima in a Babcock-Leighton Solar Dynamo Model

Karak, B. B; Miesch, Mark (IOP Publishing, 2018-06-20)

he Sun occasionally goes through Maunder-like extended grand minima when its magnetic activity drops considerably from the normal activity level for several decades. Many possible theories have been proposed to explain the ...

Browsing by Author "Karak, B. B"

Browsing by Author "Karak, B. B"

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