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arXiv · 2512.21928

beta plane corrections to nonlinear atmospheric flow patterns application to jupiters great red spot (GRS) drift dynamics

Oladiran Johnson Abimbola
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Abstract

The Great Red Spot (GRS) of Jupiter has been observed for over a century, with researchers studying its characteristics and dynamics, including its size, depth, movement, and interactions with its environment. Recently, the f-plane thin-shell asymptotic analysis was used to explain some of the GRS features, but the method failed to capture the observed westward drift of the GRS. In this study, the f-plane theory was extended by including the Rossby parameter in the \beta-plane approximation and using the dimensionless Rossby deformation parameter \gamma, to systematically apply perturbation theory. The westward drift velocity of 3.7 m/s was analytically predicted, which is 95% in agreement with the observed 3.9 m/s. The observed 90-day oscillation in drift rate was explained. Also explained is the north-south asymmetry in circulation patterns. The universality of the \b{eta}-plane theory was demonstrated by its application to the vortices on Saturn, Neptune and Earth, without free parameters. It was demonstrated in this study that for the understanding of long-lived atmospheric vortex dynamics, the planetary vorticity gradient is very critical.

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Oladiran Johnson Abimbola. 2025-12-26. beta plane corrections to nonlinear atmospheric flow patterns application to jupiters great red spot (GRS) drift dynamics. https://arxiv.org/abs/2512.21928

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