2008 Volume 43 Issue 2 Pages 79-91
Sensitivities of emission sources and transboundary transport on pollutant concentrations were calculated by 3-D air quality simulation. The sensitivity of transboundary transport on O3 was exclusively high. The sensitivities of vehicles and other anthropogenic sources on yearly or monthly O3 were negative throughout a year. Transboundary transport had a certain sensitivity on SPM and even on NO2 because NO2 production via the reaction of NO and O3 is O3-sensitive under high NO conditions like urban areas. The sensitivities of sources and the transboundary transport on individual components of SPM were affected by various nonlinear processes like photochemical reactions involving O3 and VOC, and the equilibrium between particles and gas in the atmosphere, as well as the direct contribution of emissions and transboundary transport.
It was implied that tranboundary transport and complex and nonlinear processes in the atmosphere, as well as the direct emission of pollutants, must be taken into account in order to consider effective strategies to improve air quality.
