Atmos. Meas. Tech., 13, 1337–1356, 2020 https://doi.org/10.5194/amt-13-1337-2020 © Author(s) 2020. This work is distributed under the Creative Commons Attribution 4.0 License. Assessing Measurements of Pollution in the Troposphere (MOPITT) carbon monoxide retrievals over urban versus non-urban regions Wenfu Tang1,2, Helen M. Worden2, Merritt N. Deeter2, David P. Edwards2, Louisa K. Emmons2, Sara Martínez-Alonso2, Benjamin Gaubert2, Rebecca R. Buchholz2, Glenn S. Diskin3, Russell R. Dickerson4, Xinrong Ren4,5, Hao He4, and Yutaka Kondo6 1Advanced Study Program, National Center for Atmospheric Research, Boulder, CO, USA 2Atmospheric Chemistry Observations and Modeling, National Center for Atmospheric Research, Boulder, CO, USA 3NASA Langley Research Center, Hampton, VA, USA 4Department of Atmospheric and Oceanic Science, University of Maryland, College Park, MD, USA 5Air Resources Laboratory, National Oceanic and Atmospheric Administration, College Park, MD, USA 6National Institute of Polar Research, Tachikawa, Japan Correspondence: Wenfu Tang (
[email protected]) Received: 4 November 2019 – Discussion started: 28 November 2019 Revised: 31 January 2020 – Accepted: 16 February 2020 – Published: 23 March 2020 Abstract. The Measurements of Pollution in the Tropo- luted scenes. We test the sensitivities of the agreements be- sphere (MOPITT) retrievals over urban regions have not been tween MOPITT and in situ profiles to assumptions and data validated systematically, even though MOPITT observations filters applied during the comparisons of MOPITT