Cloud condensation nuclei or ccns also known as cloud seeds are small particles typically 0 2 µm or 1 100 the size of a cloud droplet on which water vapor condenses. Precipitation requires very small particles to serve as a.
Water requires a non gaseous surface to make the transition from a vapour to a liquid.
What is cloud condensation nuclei. In the atmosphere this surface presents itself as tiny solid or liquid particles called ccns. The truth is cloud formation isn t as simple as it first appears because to understand clouds you must first understand something called condensation nuclei. Particles in the atmosphere called cloud condensation nuclei ccn.
Cloud condensation nuclei ccn are a subset of hygroscopic aerosol particles that nucleate water drops at supersaturations less than 1. The number of cloud droplets per cubic centimetre ranges from less than 100 to more than 1 000 read more. This process is called condensation.
Condensation nuclei are tiny particles. Typically a cloud is composed of tiny spheres of water that range in diameter from a few micrometres to a few tens of micrometres. Cloud condensation nuclei ccn are a critical part of the precipitation forming process both for rain and snow formation processes.