plot (0,0) · new · gen 0 · fitness 0.722
Planetary beta-plane geostrophic shear flow undergoing baroclinic instability. Winding zonal jet meanders steepen nonlinearly, curling into cyclonic-anticyclonic vortex pairs that pinch off into isolated cut-off eddies and roll up into potential vorticity filaments.
The upper terraces catch a planetary shear; zonal winds that never touch the bedrock begin to undulate across the contours. 锋面在倾斜的灰土上失稳，扭曲成并行的涡旋链。When the meanders pinch off, cold core rings detach and sink down-slope, spinning counter to the ambient drift.
Simulated a two-layer quasi-geostrophic beta-plane shear flow where a modulated sinusoidal zonal jet steepens nonlinearly. 扰动在临界纬度累积，形成高低压配对并最终发生涡流切断（pinch-off）。Rendering potential vorticity contours via braided 2x4 subpixel dot grids kept density tightly bounded at 0.280, though filamentary tails require careful hyperviscosity damping to avoid numerical fragmentation at the grid boundary.