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Snow - a photobiochemical exchange platform for volatile and semi-volatile organic compounds with the atmosphere

Abstract : Field and laboratory studies of organic compounds in snow (12 species; concentrations <= 17 μg L-1) were conducted and microorganisms in snow and aerosols at urban and Arctic sites were investigated (snow: total bacteria count <= 40000 colony forming units per millilitre (CFU mL(-1)), fungi <= 400 CFU mL(-1); air: bacteria <= 2.2 x 10(7) CFU m(-3), fungi <= 84 CFU m(-3)). Bio-organic material is transferred between snow and air and influence on snow-air exchange processes is demonstrated. Volatile organic compounds in snow are released into the air upon melting. In vitro photochemistry indicated an increase of <= 60 μg L-1 for 1,3- and 1,4-dimethylbenzenes. Bacillus cereus was identified and observed in snow and air with ice-nucleating being P. syringae absent. As a result snow photobiochemical reactions should be considered in describing organic matter air-snow exchanges, and the investigation of climate change.
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https://hal-insu.archives-ouvertes.fr/insu-00646050
Contributor : Aurore Gayraud <>
Submitted on : Tuesday, November 29, 2011 - 10:03:48 AM
Last modification on : Friday, September 25, 2020 - 11:02:45 AM

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P. A. Ariya, F. Domine, Gregor Kos, M. Amyot, V. Côté, et al.. Snow - a photobiochemical exchange platform for volatile and semi-volatile organic compounds with the atmosphere. Environmental Chemistry, CSIRO Publishing, 2011, 8 (1), pp.62-73. ⟨10.1071/EN10056⟩. ⟨insu-00646050⟩

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