Articles | Volume 10, issue 10
Atmos. Meas. Tech., 10, 3865–3876, 2017
Atmos. Meas. Tech., 10, 3865–3876, 2017

Research article 23 Oct 2017

Research article | 23 Oct 2017

Quantifying TOLNet ozone lidar accuracy during the 2014 DISCOVER-AQ and FRAPPÉ campaigns

Lihua Wang1, Michael J. Newchurch1, Raul J. Alvarez II2, Timothy A. Berkoff3, Steven S. Brown2, William Carrion3,4, Russell J. De Young3, Bryan J. Johnson2, Rene Ganoe4, Guillaume Gronoff3,4, Guillaume Kirgis2,5, Shi Kuang1, Andrew O. Langford2, Thierry Leblanc6, Erin E. McDuffie2,5,7, Thomas J. McGee8, Denis Pliutau4, Christoph J. Senff2,5, John T. Sullivan8,9, Grant Sumnicht4, Laurence W. Twigg4, and Andrew J. Weinheimer10 Lihua Wang et al.
  • 1University of Alabama in Huntsville, Huntsville, Alabama, USA
  • 2NOAA Earth System Research Laboratory, Boulder, Colorado, USA
  • 3NASA Langley Research Center, Hampton, Virginia, USA
  • 4Science Systems and Applications Inc., Lanham, Maryland, USA
  • 5Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USA
  • 6Jet Propulsion Laboratory, California Institute of Technology, Wrightwood, California, USA
  • 7Department of Chemistry, University of Colorado, Boulder, Colorado, USA
  • 8NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
  • 9Joint Center for Earth Systems Technology, Baltimore, Maryland, USA
  • 10National Center for Atmospheric Research, Boulder, Colorado, USA

Abstract. The Tropospheric Ozone Lidar Network (TOLNet) is a unique network of lidar systems that measure high-resolution atmospheric profiles of ozone. The accurate characterization of these lidars is necessary to determine the uniformity of the network calibration. From July to August 2014, three lidars, the TROPospheric OZone (TROPOZ) lidar, the Tunable Optical Profiler for Aerosol and oZone (TOPAZ) lidar, and the Langley Mobile Ozone Lidar (LMOL), of TOLNet participated in the Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality (DISCOVER-AQ) mission and the Front Range Air Pollution and Photochemistry Éxperiment (FRAPPÉ) to measure ozone variations from the boundary layer to the top of the troposphere. This study presents the analysis of the intercomparison between the TROPOZ, TOPAZ, and LMOL lidars, along with comparisons between the lidars and other in situ ozone instruments including ozonesondes and a P-3B airborne chemiluminescence sensor. The TOLNet lidars measured vertical ozone structures with an accuracy generally better than ±15 % within the troposphere. Larger differences occur at some individual altitudes in both the near-field and far-field range of the lidar systems, largely as expected. In terms of column average, the TOLNet lidars measured ozone with an accuracy better than ±5 % for both the intercomparison between the lidars and between the lidars and other instruments. These results indicate that these three TOLNet lidars are suitable for use in air quality, satellite validation, and ozone modeling efforts.

Short summary
Intercomparisons have been made between three TOLNet ozone lidars and between the lidars and other ozone instruments during the 2014 DISCOVER-AQ and FRAPPÉ campaigns in Colorado. Overall, the TOLNet lidars are capable of measuring 5 min tropospheric ozone variations with accuracy better than ±15 % in terms of their vertical resolving capability and better than ±5 % in terms of their column average measurement. These results indicate very good measurement accuracy for the three TOLNet lidars.