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  • Modeled dry deposition flux of nitrogen nitrogen dioxide (NO2) in central Arizona, USA (1998)
  • Grossman-Clarke, Susanne; University of Wisconsin–Madison
    Hope, Diane; Arizona State University
    Fernando, H; Arizona State University
    Stefanov, William; NASA Johnson Space Center
    Zehnder, Joseph; Creighton University
    Hyde, Peter G; Arizona State University
  • 2022-03-24
  • Grossman-Clarke, S., D. Hope, H. Fernando, W. Stefanov, J. Zehnder, and P.G. Hyde. 2022. Modeled dry deposition flux of nitrogen nitrogen dioxide (NO2) in central Arizona, USA (1998) ver 1. Environmental Data Initiative. https://doi.org/DOI_PLACE_HOLDER (Accessed 2024-12-27).

  • The role of urban vegetation on NOx-derived dry deposition fluxes was investigated for the arid Phoenix (Arizona, USA) metropolitan area using the Community Multiscale Air Quality Model (CMAQ) (9-13 June 1998). A new land cover classification and updated land cover data were introduced in the model to account for spatial extent and heterogeneity of urban land cover. Adjustments were made in the deposition velocity calculations to consider the adaptation of local plants to the environmental conditions of Central Arizona. According to the simulations 25 % of the NOx derived dry deposition fluxes in the urban area were deposited on vegetation. When urban vegetation was excluded from the simulations NO2 deposition was reduced by 57 % because of the significantly lower deposition velocities of impervious compared to vegetated surfaces; nitric acid deposition was relatively unchanged. Using a diagnostic model with input data from urban air quality monitoring sites, hourly NO and NO2 dry N deposition fluxes were simulated for the entire year 1998 to ~6 kg ha-1 yr-1. Dry deposition declined during the summer months, due to lower pollutant concentrations and temperature-induced closure of the plant stomata during afternoon hours.

  • N: 34.0794      S: 33.1074      E: -111.1225      W: -112.6345
  • knb-lter-cap.263.1  (Uploaded 2022-03-24)  
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  • DOI PLACE HOLDER

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