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Atmospheric Measurement Techniques









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.


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

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

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This work is licensed under a Creative Commons Attribution 3.0 License.