ssociated with these forest fires, ozone levels increased between 50-100 percent in the first 5 kilometers over Houston," said Morris. Meteorological conditions, the smoke from the distant forest fires, and the typical urban pollution generated in the Houston area provided a potent mix for increasing local ozone concentrations.

The scientists believe that such pollution episodes will continue. Understanding the transport and transformation of gases and aerosols over long distances is needed for improved understanding and air quality forecasting.

"This event highlights the critical role imported sources can have on local air quality," said Morris. Balloon-borne data and ground observations combined with data from NASA's suite of satellites and computer models will continue to advance our understanding of the impact of pollutants on air quality. Such information will help enable environmental managers to improve air quality forecasts and propose more effective air quality solutions.

'"/>

Contact: Rob Gutro
robert.J.gutro@nasa.gov
301-286-4044
NASA/Goddard Space Flight Center
21-Sep-2006

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