Ubiquity of Biological Ice Nucleators in Snowfall-Reference-Cited by-同舟云学术

Ubiquity of Biological Ice Nucleators in Snowfall

Published:2008-02-29 Issue:5867 Volume:319 Page:1214-1214
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Christner Brent C.¹²³⁴,Morris Cindy E.¹²³⁴,Foreman Christine M.¹²³⁴,Cai Rongman¹²³⁴,Sands David C.¹²³⁴

Affiliation:

1. Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.

2. L'Institut Nationale de la Recherche Agronomique, Unité de Pathologie Végétale UR407, F-84140 Montfavet, France.

3. Center for Biofilm Engineering and Department of Land Resources and Environmental Sciences, Montana State University, Bozeman, MT 59717, USA.

4. Department of Plant Sciences and Plant Pathology, Montana State University, Bozeman, MT 59717, USA.

Abstract

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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference8 articles.

1. Biological Ice Nucleation and Its Applications 1995

2. Abundance of Cellular Material and Proteins in the Atmosphere

3. Microbiology and atmospheric processes: the role of biological particles in cloud physics

4. C. E. Morris, D. Georgakapolous, D. C. Sands, J. Phys. (Paris)121, 87 (2004).

5. Materials and methods are available on Science Online.

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