Ice crystals in the atmosphere nucleate from supercooled liquid water and grow by vapor
uptake. The structure of the ice polymorph grown has strong impact on the morphology and
light scattering of the ice crystals, modulates the amount of water vapor in ice clouds, and
can impact the molecular uptake and reactivity of atmospheric aerosols. Experiments and
molecular simulations indicate that ice nucleated and grown from deeply supercooled liquid
water is metastable stacking disordered ice. The ice polymorph grown from vapor has not …