Tropospheric Ozone Lidar Network

In the troposphere, ozone is considered a pollutant and is important to understand due to its harmful effects on human health and vegetation. Tropospheric ozone is also significant for its impact on climate as a greenhouse gas. Operating since 2011, The Tropospheric Ozone Lidar Network (TOLNet) is an interagency collaboration between NASA, NOAA, and the EPA designed to perform studies of air quality and atmospheric modeling as well as validation and interpretation of satellite observations. TOLNet is currently comprised of six Differential Absorption Lidars (DIAL). Each of the lidars are unique, and some have had a long history of ozone observations prior to joining the network. Five lidars are mobile systems that can be deployed at remote locations to support field campaigns. This includes the Langley Mobile Ozone Lidar (LMOL) at NASA Langley Research Center (LaRC), the Tropospheric Ozone (TROPOZ) lidar at the Goddard Space Flight Center (GSFC), the Tunable Optical Profile for Aerosol and oZone (TOPAZ) lidar at the NOAA Chemical Sciences Laboratory (CSL) in Boulder, Colorado, the Autonomous Mobile Ozone LIDAR instrument for Tropospheric Experiments (AMOLITE) lidar at Environment and Climate Change Canada (ECCC) in Toronto, Canada, and the Rocket-city O3 Quality Evaluation in the Troposphere (RO3QET) lidar at the University of Alabama in Huntsville, Alabama. The remaining lidar, the Table Mountain Facility (TMF) tropospheric ozone lidar system located at the NASA Jet Propulsion Laboratory (JPL), is a fixed system.

TOLNet seeks to address three science objectives. The primary objective of the network is to provide high spatio-temporal measurements of ozone from near the surface to the top of the troposphere. Detailed observations of ozone structure allow science teams and the modeling community to better understand ozone in the lower-atmosphere and to assess the accuracy and vertical resolution with which geosynchronous instruments could retrieve the observed laminar ozone structures. Another objective of TOLNet is to identify an ozone lidar instrument design that would be suitable to address the needs of NASA, NOAA, and EPA air quality scientists who express a desire for these ozone profiles. The third objective of TOLNET is to perform basic scientific research into the processes create and destroy the ubiquitously observed ozone laminae and other ozone features in the troposphere. To help fulfill these objectives, lidars that are a part of TOLNet have been deployed to support nearly ten campaigns thus far. This includes campaigns such as the Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) mission, the Korea United States Air Quality Study (KORUS-AQ), the Tracking Aerosol Convection ExpeRiment – Air Quality (TRACER-AQ) campaign, the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ), the Long Island Sound Tropospheric Ozone Study (LISTOS), and the Ozone Water–Land Environmental Transition Study (OWLETS).

Disciplines:   Tropospheric Composition

TOLNet Citations

Gronoff G, Robinson J, Berkoff T, Swap R, Farris B, Schroeder J, Halliday H S, Knepp T, Spinei E, Carrion W, Adcock E E, Johns Z, Allen D, and Pippen M (2019). A method for quantifying near range point source induced O3 titration events using Co-located Lidar and Pandora measurements. Atmospheric Environment, 204 43. http://dx.doi.org/10.1016/j.atmosenv.2019.01.052


Farris B M, Gronoff F P, Carrion W, Knepp T, Pippin M, and Berkoff T A (2019). Demonstration of an off-axis parabolic receiver for near-range retrieval of lidar ozone profiles. Atmospheric Measurement Techniques, 12 (1), 363. http://dx.doi.org/10.5194/amt-12-363-2019


Granados-Muñoz M J, Johnson M S, Leblanc T (2017). Influence of the North American monsoon on Southern California tropospheric ozone levels during summer in 2013 and 2014. Geophysical Research Letters, 44 (12), 6431. http://dx.doi.org/10.1002/2017gl073375


Granados-Muñoz M J and Leblanc T (2016). Tropospheric ozone seasonal and long-term variability as seen by lidar and surface measurements at the JPL-Table Mountain Facility, California. Atmospheric Chemistry and Physics, 16 (14), 9299. http://dx.doi.org/10.5194/acp-16-9299-2016


Edwards P M, Brown S S, Roberts J M, Ahmadov R, Banta R M, deGouw J A, Dubé W P, Field R A, Flynn J H, Gilman J B, Graus M, Helmig D, Koss A, Langford A O, Lefer B L, Lerner B M, Li R, Li S, McKeen S A, Murphy S M, Parrish D D, Senff C J, Soltis J, Stutz J, Sweeney C, Thompson C R, Trainer M K, Tsai C, Veres P R, Washenfelder R A, Warneke C, Wild R J, Young C J, Yuan B, and Zamora R (2014). High winter ozone pollution from carbonyl photolysis in an oil and gas basin. Nature, 351. http://dx.doi.org/10.1038/nature13767