2.19 A Perspective on Development of Effective Ozone Control Strategies in Urban Regions of South and Central Texas

摘要

A regional photochemical modeling system is applied to multiple high ozone episodes of September 13-20, 1999 and September 8-16, 2002 over urban South and Central Texas to assess the relative impact of emissions on ozone levels. Overall NO_x emission reductions produced greater ozone benefits. The cities of Austin and San Antonio exhibited greater sensitivity towards NO_x emissions and were affected most by on-road mobile emissions with zero-out emission simulations. The coastal urban area of Corpus Christi indicated no significant bias towards NO_x or VOC emissions and was most affected by non-road mobile emissions. The city of Victoria demonstrated greater sensitivity towards point sources. Emission reduction strategies needed for maintaining air quality within any urban airshed must be based on multiple ozone episodes in order to reduce episode-episode variability in the effectiveness of emission control strategies.