BetaEddyOne: A long-lived 1.5 layer quasigeostrophic eddy on a beta plane, with Lagrangian particles

BetaEddyOne is a yearlong simulation of a large, nonlinear oceanic eddy under 1.5 layer quasigeostrophic dynamics on a beta plane, initially located at 24˚N.  The simulation is run at 512 x 256 resolution and is seeded with Lagrangian particles with one particle per grid point. 

This simulation is indended for use as a common test case for eddy-related diagnostics and analysis methods.  It approximately replicates the eddy analyzed in detail in Early, Samelson, and Chelton (2011), https://doi.org/10.1175/2011JPO4601.1.  The simulation was created using the WaveVortexModel (Early, Lelong, and Sundermeyer, 2021, https://doi.org/10.1017/jfm.2020.995), the code for which is available on GitHub at https://github.com/Energy-Pathways-Group/GLOceanKit.  This particular simulation was created for use in the paper

Lilly, J. M., J. Feske, B. Fox-Kemper, and J. J. Early (2024). Integral theorems for the gradient of a vector field, with a fluid dynamical application. Proceedings of the Royal Society of London, Series A. 480 (2293): 20230550, 1–30. doi 10.1098/rspa.2023.0550.

The figure shows a snapshot of the model's vertical vorticity.