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contact nucleus

meteorology

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  • feathery cirrus clouds over Pinawa Dam Provincial Park
    In atmosphere: Condensation

    …of three types: deposition nuclei, contact nuclei, and freezing nuclei. Deposition nuclei are analogous to condensation nuclei in that water vapour directly deposits as ice crystals on the aerosol. Contact and freezing nuclei, in contrast, are associated with the conversion of supercooled water to ice. A contact nucleus converts liquid…

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