On the impact of snow cover on daytime pollution dispersion |
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| Institution: | 1. Department of Physics and Astronomy, The University of Kansas, Lawrence, KS 66045, U.S.A.;2. CSIRO Division of Atmospheric Research, Private Bag No. 1, Mordialloc, Victoria, 3195, Australia;3. Department of Atmospheric Science, Colorado State University, Fort Collins, CO 80523, U.S.A.;4. National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307, U.S.A.;1. Institute of Industrial Ecology UB RAS, Kovalevskaya Str., 20, Ekaterinburg, 620990, Russia;2. Ural Federal University, Mira Str., 32, Ekaterinburg, 620002, Russia;1. IDEA Research Group, University of Jaén, Campus de Las Lagunillas, 23071, Jaén, Spain;2. DIGITS, Department of Computer Science and Informatics, Faculty of Technology, De Montfort University, The Gateway, LE1 9BH, Leicester, UK;1. Faculty of Science, Nara Women''s University, Nara, Japan;2. Meteorological Research Institute, Tsukuba, Japan;3. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA |
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| Abstract: | A preliminary evaluation of the impact of snow cover on daytime pollutant dispersion conditions is made by using conceptual, scaling, and observational analyses. For uniform snow cover and synoptically unperturbed sunny conditions, observations indicate a considerate suppression of the surface sensible heat flux, the turbulence, and the development of the daytime atmospheric boundary layer (ABL) when compared to snow-free conditions. However, under conditions of non-uniform snow cover, as in urban areas, or associated with vegetated areas or bare ground patches, a milder effect on pollutant dispersion conditions would be expected. Observed concentrations of atmospheric particles within the ABL, and surface pollutant concentrations in urban areas, reflect the impact of snow cover on the modification of ABL characteristics. |
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