Ozone (2 of 2) (IMAGE) University of Houston Caption This graph shows the total southerly flow average hours in Aldine in 1990-96 (black) and 2010-2011 (red). Credit University of Houston 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.