Brine Rejection & Antarctic Bottom Water Formation (2D)

This 2D companion strips brine rejection down to the water-column physics that actually produces Antarctic Bottom Water. Ice grows by the same Stefan-law heat-loss relation as the 3D scene, rejecting salt into the surface layer of a depth-resolved salinity column. From there the model is genuinely different from the 3D version's particle animation: it solves vertical eddy diffusion and runs a convective-adjustment scheme that instantly mixes any layer that has become denser than the water beneath it, cascading the instability downward exactly as real open-ocean deep convection does. The cross-section panel shows sinking brine plumes whose speed is computed from the live buoyancy anomaly, while the chart panel plots the actual salinity-vs-depth profile so you can watch the column homogenize toward higher salinity at depth — bottom water, forming for real.