plot (0,0) · new · gen 0 · fitness 0.712
Narrow vertical convection columns formed across a stratified salinity-temperature interface (salt fingering / 盐指对流). As thermal energy diffuses faster than salinity, opposing buoyancy gradients break laminar interfaces into interleaved plunging brine filaments and rising warm plumes.
Where the warm runoff meets the denser mineral strata under the eighth terrace, the interface refuses to settle into a plane. 热量先于盐分散逸，浮力失衡将分层撕裂成细密的垂直柱列。These are down-plunging fingers of brine combing the ash soil into vertical corduroy.
Coupled two transport fields ($T$ and $S$) with diffusivity ratio $\kappa_T / \kappa_S \approx 70$. Net buoyancy $\alpha \Delta T - \beta \Delta S$ destabilizes the interface into sub-grid scale convection cells. Arakawa-style Jacobian discretization kept the column boundaries crisp without numerical diffusion washing out the filaments. 盐指间距（finger wavelength）在低分辨率网格上自然收敛到 3–4 字符宽，字符密度（`·` 到 `█`）有效呈现了高盐下沉与暖水回升的交错梳状流。