Methods Study design Fig nbsp xA Runway and

For local-scale airport air quality assessment, previous studies have used the Emissions and Dispersion Modeling System (EDMS) emission inventory and American Meteorological Society and Environmental Protection Agency Regulatory Model (AERMOD) dispersion modeling (Cimorelli et al., 2005, Federal Register Notice, 1998, Kim et al., 2012, Steib et al., 2007 and Wayson et al., 2001). While AERMOD has suitably estimated traffic-pollutant concentrations (Venkatram et al., 2009), dispersion modeling for aircraft may be more challenging, given greater uncertainties for aircraft than for motor vehicles due to differential plume characteristics, including high exhaust temperature and velocity, rapid source movement, and complexity of plume formation and dynamics.