and initial and final daytime mixing height values are needed. We used the meteorological processor of the advanced air pollutant dispersion model system AERMOD (U.S. EPA, 2004; Cimorelli et al., 2005), namely, AERMET, to compute those mixing heights. Before implementing AERMET, certain land-related characteristicsof the study area (referenced at around the center of the domain) were prespecified using the AERMOD land-surface preprocessor (namely, AERSURFACE) (U.S. EPA, 2008), together with the LDD land cover data and a 42-yr (1961– 2002) daily rain data set (Table 1). The latter data were used to specify the relative wetness of the surface in each month/season. AERMET requires both surface meteorological data to drive its surface energy balance module and morning upper-air data for its daytime mixing height calculation in which mixing height increases due to sensible heat transferred from the surface to the atmospheric boundary layer. The configuration and implementation of AERSURFACE and AERMET here follow those in Chusai et al. (2012) mostly, with some adjustment to suit our Chon Buri application.