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Ozone in the West

The Ozone Workgroup, part of WESTAR, focuses on providing states with scientifically sound data and analyses to support State Implementation Plans (SIPs) for ozone pollution, especially regarding transport's role in local and regional ozone levels. Key accomplishments include reviewing literature, identifying western ozone episodes, and developing statistical methods for analyzing such data. Future work entails further investigations into transport influences, particularly from Asia, fire events, and the modeling of ozone episodes with EPA support.

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Ozone in the West

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  1. Ozone in the West WESTAR Technical Committee Ozone Workgroup May 2005

  2. Ozone Workgroup Goals 1.Provide states with scientifically sound data and analyses to support ozone SIPs, especially for areas where transport may be a significant contribution to local and regional concentrations. 2. Monitor national decisions on ozone that may affect the west

  3. 8-hour ozone nonattainment areas

  4. Ozone Trends at National Parks

  5. What is causing high ozone concentrations? • EACs for Denver, Four Corners indicate very little contribution from local sources • Transport • Global background • Impacts of fire • Growth in the west

  6. Worldwide NOx Emissions Trends

  7. Long Range Transport of Smoke Emissions

  8. Workgroup Accomplishments • Literature review and compilation • Western ozone episodes identified • Simple analysis of data to identify episodes where transport may be significant • Statistical approach developed to analyze western episodes • Other sources of tools for analysis identified

  9. Data Analysis Challenge

  10. Future Work • Further analysis of identified episodes to determine whether transport is a factor (currently seeking $$) • Determine influence of Asian transport on western ozone concentrations • Determine contributions from fire events • Modeling analyses (with EPA support)

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