TYPICAL AMBIENT CONCENTRATIONS AND AIR QUALITY STANDARDS

Gases so2 Exterior surfaces and interior of leaves 0.2-1 for dry foliage, stomata open, 1 for a wet surface 

Primarily exterior surfaces, but also interior of leaves 1-5, perhaps greater 

For further details on dry deposition, its measurement, and typical values of Vg for various pollutants, the reader is referred to the articles and books by McMahon and Denison (1979), Georgii and Pankrath (1982), Pruppacher et al. (1983), Hicks (1984), Dab-berdt et al. (1993), Wesely (1989), Erisman et al. (1994), Foken et al. (1995), Lovett (1994), Gao and Wesely (1995), and Wesely and Hicks (1999). 

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