Research Aircraft (IMAGE) University of Colorado at Boulder Caption A cadre of government and commercial aircraft helped collect data for a new study linking an increase in springtime ozone levels in western North America with pollutants drifting eastward from overseas, including Asia. Credit Image courtesy NOAA Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.