Date: 26 Aug 2014
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Condensation Nuclei

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Condensation nuclei are very small atmospheric particles in the range of 1 nm–0.1 μm on which water can condense at very high supersaturations. Atmospheric aerosols upon which water vapor can condense at lower supersaturations are called as Cloud Condensation Nuclei (CCN). Only a small fraction of aerosols serve as CCN (about 1% in continental air and about 10–20% in maritime air). Most of the CCN would be a mixture of soluble and insoluble components.