Research Program Area: Atmospheric Processes
As mandated by the California Clean Air Act of 1988, the California Air Resources Board (ARB) is required to assess the contribution of emissions from upwind air basins to high ozone concentrations in downwind air basins and to develop mitigating emission control strategies that will lead to attainment of the state ozone standard in the affected air basins. In this study, pollutant transport within Southern Desert1 and San Diego Air Basins (SEDAB and SDAB, respectively) is examined using data collected during the 1992 summer field program. These data include Radar Wind Profiler (RWP), Radio Acoustic Sounding System (RASS), and aircraft data. The overall objective of the study was to provide and improved understanding of the three-dimensional meteorological and air quality characteristics of interbasin pollutant transport. The results of this study are summarized in three sections:
Section 1 summarizes the comparison of the RWP and RASS data with routine radiosonde measurements.
Section 2 describes the development of a conceptual model for transport between the SOCAB and the former SEDAB, primarily the Mojave Desert Air Basin (MDAB).
Section 3 contains an analysis of the airflow patterns and calculated trajectories for selected days representing a variety of transport conditions.
The results from each phase of the analysis are summarized in Section 4.
For questions regarding this research project, including available data and progress status, contact: Research Division staff at (916) 445-0753
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