Atmospheric Chemistry and Physics Discussions www.atmos-chem-phys-discuss.net 1680-7367 1680-7375 10 2 2010 10.5194/acpd-10-3807-2010 http://www.atmos-chem-phys-discuss.net/10/3807/2010/ http://www.atmos-chem-phys-discuss.net/10/3807/2010/acpd-10-3807-2010.html http://www.atmos-chem-phys-discuss.net/10/3807/2010/acpd-10-3807-2010.pdf 3807 3826 2010-02-10 Are there urban signatures in the tropospheric ozone column products derived from satellite measurements? J. Kar jayanta.kar@nasa.gov J. Fishman J. K. Creilson A. Richter J. Ziemke S. Chandra Science Systems and Applications Inc., Hampton, VA, 23666, USA NASA Langley Research Center, Hampton, VA, 23681, USA Institute of Environmental Physics, University of Bremen, Bremen, Germany GEST, University of Maryland, Baltimore, MD, USA In view of the proposed geostationary satellite missions to monitor air quality from space, it is important to first assess the capability of the current suite of satellite instruments to provide information on the urban scale pollution. We explore the possibility of detecting urban signatures in the tropospheric column ozone data derived from TOMS/SBUV and OMI/MLS satellite data. We find that distinct isolated plumes of tropospheric ozone near several large and polluted cities around the world may be detected in these data sets. The ozone plumes generally correspond with the tropospheric column NO₂ plumes around these cities as observed by the SCIAMACHY instrument. 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