Are there urban signatures in the tropospheric ozone column products derived from satellite measurements?

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Abstract

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 in-struments to provide information on the urban scale pollution. We explore the pos-sibility of detecting urban signatures in the tropospheric column ozone data derived 5 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 tro-pospheric column NO 2 plumes around these cities as observed by the SCIAMACHY instrument. Similar plumes are also seen in tropospheric mean ozone mixing ratio dis-10 tribution after accounting for the surface and tropopause pressure variations. The total column ozone retrievals indicate fairly significant sensitivity to the lower troposphere over the polluted land areas, which might help explain these detections. These results indicate that UV measurements may, in principle, be able to capture the urban signa-tures and may have implications for future missions using geostationary satellites.

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Kar, J., Fishman, J., Creilson, J. K., Richter, A., Ziemke, J., & Chandra, S. (2010). Are there urban signatures in the tropospheric ozone column products derived from satellite measurements? Atmospheric Chemistry and Physics, 10(11), 5213–5222. https://doi.org/10.5194/acp-10-5213-2010

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