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

P. A. Ariya 1, 2 F. Domine 3 Gregor Kos 2 M. Amyot 4 V. Côté 2 H. Vali 5 T. Lauzier 3 W.F. Kuhs 6 K. Techmer 6 T. Heinrichs 7 R. Mortazavi 1
1 Department of Chemistry [Montréal]
2 Department of Atmospheric and Oceanic Sciences [Montréal]
3 CHANG - CHANG
LTHE - Laboratoire d'étude des transferts en hydrologie et environnement
4 Département de Sciences Biologiques [Montreal]
5 Department of Anatomy and Cell Biology [Montréal]
6 GZG - Geowissenschaftliches Zentrum Göttingen
7 GZG - Universität Goettingen
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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Submitted on : Tuesday, November 29, 2011 - 10:03:48 AM
Last modification on : Monday, December 14, 2020 - 3:46:13 PM

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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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