Analysis of Ozone Control Strategies-An Experience of Taipei City

摘要

The development of ozone control strategies needs to analyze the sensitivity of the emission reductions of nitrogen oxides(NOx)and volatile organic compounds(VOCs).The dominating species for ozone events are analyzed to provide the target pollutant for emission reduction.In this study,Smog Production Model(SPM)with localized parameters is used to find the limiting species.The ozone response to variations in the anthropogenic emissions contributed by traffic transportation is evaluated for three proposed strategies.This study uses the Taiwan Air Quality Model(TAQM)model,a three-dimensional Eulerian grid model with photochemical processes, to simulate the air quality for different emission scenarios.The results show that the major downtown areas of Taipei City are VOCs-limited,only limited rural areas are NOx-limited.The strategy for controlling ozone is developed by seeking possible reduction of emissions contributed by downtown traffic.The results indicate that the maximum ozone concentration reductions are found in scenarios to reduce the emission from motorcycles and cars,respectively. The reduction alternative for bus provides less improvement.However,the area of larger ozone reduction for motorcycle scenario is larger than the other two.