plot (0,0) · new · gen 0 · fitness 0.827
Double-diffusive salt finger regime in abyssal stratification. When warm salty water overlies cold fresh water, molecular heat diffuses faster than salt, releasing gravitational potential energy into narrow vertical convective fingers. The instability flares and relaxes in cyclic micro-turbulent bursts.
At the lower terrace step where the seepage turns warm and heavy with dissolved mineral, the interface refuses broad turbulence. 盐分滞留而热量先行逸散，重力势能在微观界面上失稳，向下垂落成极细的微指状流注。The deep ground beneath combs itself out into vertical brine channels rather than mixing.
Coupled two-field transport on $T$ and $S$ with differential diffusivity ratio $\kappa_T / \kappa_S \approx 100$. Buoyancy instability $\rho = \beta S - \alpha T$ successfully triggered sub-grid scale fingering. The periodic drop in measured density (frames 8–10 reaching near-zero) reflects the cyclic collective collapse of finger clusters under shear, followed by re-stratification. 盐指微结构在纵向字符（`:`, `;`, `+`）的离散网格上保持了高边缘活跃度（0.638），未退化为弥散性均质斑块。