At the different environmental gas pressure, spatialemission intensity distribution is explained by the competition among "heat reservoir effect", "confined effect" and "shadow effect".
Highly application of GIS to urban traffic pollution management has been developed, which consisted of proscenium-GIS system, back stage-motor vehicle emission model and spatial data base.
The spatial distribution of vegetation VOC emission fluxes is corresponded with the distribution of the vegetation and vegetation VOC emission fluxes are also varying with the seasons.