Lin Lawell, C.-Y. Cynthia; Jacob, Daniel J.; Munger, J. … - 2004
The long-term trend of background O3 in surface air over the United States from 1980 to 1998 is examined using monthly probability distributions of daily maximum 8-hour average O3 concentrations at a large ensemble of rural sites. Ozone concentrations have decreased at the high end of the...