Dry Ice

CO₂ (solid)

Glaciogenic (cold-cloud) agentPrimary Agent

Mechanism of Action

Works through homogeneous nucleation. Extremely cold temperature (~-80°C) causes surrounding air to become supersaturated with respect to ice, leading to spontaneous formation of ice crystals from water vapor.

Effective Temperature

-80°C (agent temperature)

Delivery Methods

Pellet dropping from aircraft

Usage

Common agent for cold-cloud seeding, alternative to silver iodide

Environmental Notes

CO₂ is a natural atmospheric gas; no significant environmental concern at seeding scales.