This paper inter-compares the performance of AERMOD and EIAA (the current Chinese regulatory model) against the Alaska tracer field experiment. The predicted maximum arc-wise Ground Level Concentrations (GLC) are compared with the observed tracer field data. The scatter plots, QQ plots, and residual plots are examined. EIAA frequently underestimates the GLC because it lacks any downwash algorithm. AERMOD with downwash shows significant improvement over the performance of EIAA. This work was initiated by a need for updating the Chinese regulatory guidelines, and to examine the suitability of US EPA models for use in China.
Keywords: AERMOD, EIAA, Gaussian plume modelling, building downwash, China, Chinese regulatory guidelines, air quality, air pollution, dispersion modelling, pollutant dispersion