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www.geosci-model-dev-discuss.net/3/1317/2010/
doi:10.5194/gmdd-3-1317-2010
© Author(s) 2010. This work is distributed
under the Creative Commons Attribution 3.0 License.
Development and validation of a size-resolved particle dry deposition scheme for applications in aerosol transport models
1Air Quality Research Division, Science and Technology Branch, Environment Canada, 4905 Dufferin Street, Toronto, Ontario M3H 5T4, Canada
*now at: The University of Toronto, Department of Chemistry, 80 St George Street, Toronto, Ontario M5S 3H6, Canada
Abstract. A size-resolved particle dry deposition scheme is developed, which has been designed for inclusion in large-scale air quality and climate models, where the size distribution and fate of the atmospheric aerosol is of concern. The "resistance" structure is similar to what is proposed by Zhang et al. (2001, 2003), while a new "surface" deposition velocity (or surface resistance) is derived by simplification of a one-dimensional aerosol transport model (Petroff et al., 2008b, 2009). Collection efficiencies are given for the 26 Land Use Categories that decribe the earth surface. Validation of this model with existing measurements is performed on desert, grass, coniferous forest and liquid water surfaces. A comparison of this model with measurements on snow and ice is also given. Even though a qualitative agreement is reached, further size-segegated measurements are needed in order to confirm the model accuracy on this surface. The present analytical model provides more accurate predictions of the aerosol deposition on these surfaces than previous models.
Discussion Paper (PDF, 837 KB) Interactive Discussion (Closed, 4 Comments) Final Revised Paper (GMD)
Notice on Discussion StatusCitation: Petroff, A. and Zhang, L.: Development and validation of a size-resolved particle dry deposition scheme for applications in aerosol transport models, Geosci. Model Dev. Discuss., 3, 1317-1357, doi:10.5194/gmdd-3-1317-2010, 2010. Bibtex EndNote Reference Manager XML
