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Journal Articles Science Year : 2008

Ubiquity of biological ice nucleators in snowfall

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Despite the integral role of ice nucleators (IN) in atmospheric processes leading to precipitation, their sources and distributions have not been well established. We examined IN in snowfall from mid- and high-latitude locations and found that the most active were biological in origin. Of the IN larger than 0.2 micrometer that were active at temperatures warmer than -7°C, 69 to 100% were biological, and a substantial fraction were bacteria. Our results indicate that the biosphere is a source of highly active IN and suggest that these biological particles may affect the precipitation cycle and/or their own precipitation during atmospheric transport

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hal-02663388 , version 1 (31-05-2020)



Brent C. Christner, Cindy E. Morris, Christine M. Foreman, Rongman Cai, David C. Sands. Ubiquity of biological ice nucleators in snowfall. Science, 2008, 319 (5867), pp.1214. ⟨10.1126/science.1149757⟩. ⟨hal-02663388⟩
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