condensation nuclei

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condensation nuclei

Small particles in the air on which water vapors condense or sublimate. Smoke and dust particles act as condensation nuclei.
References in periodicals archive ?
In clouds having their entire depth at temperatures greater than 0[degrees]C, rain may form from the so-called warm rain process, where cloud droplets nucleated upon special aerosol particles (called cloud condensation nuclei, or CCN) near the base of the cloud grow by condensation as they ascend within the cloud, and once achieving large enough sizes, grow by collection of smaller drops to produce drizzle or raindrops.
We were amazed by the speed and efficiency with which the electrons [generated by cosmic rays] do their work of creating the building blocks for the cloud condensation nuclei," says Svensmark.
As a result, they did not form cloud condensation nuclei, as is usually expected in such dust particles, and so they suppressed rainfall and exacerbated the droughts.