NASA/UAH Atmospheric Science “Brown Bag” Seminar Program Presentation
Wednesday, April 2, 2014
12:45 pm; Room 4065
Tennessee Valley Ozone Maxima Originating From Lightning NOx
Harold Peterson - NASA/MSFC-USRA
Kathy Jones - Air Pollution Control Bureau/Chattanooga, TN
The purpose of this project is to see whether ozone maxima measured by the DIfferential Absorption Lidar (DIAL) instrument in Huntsville, AL and by ambient ozone monitors in Chattanooga, TN may be traced back to lightning events occurring 24-48 hours beforehand. The methodology is to start with lidar measurements of ozone from DIAL or surface ozone measurements depending whether the site of interest is Huntsville or Chattanooga, respectively. The HYbrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model is then used to determine the origin of these ozone maxima 24-48 hours prior. Data from the National Lightning Detection Network (NLDN) are used to examine the presence/absence of lightning along the trajectory. This type of analysis suggests that lightning-produced NOx may be responsible for some of the ozone maxima over the Tennessee Valley.
Visit Coordinator: Harold Peterson – NASA/MSFC-USRA