Korean Journal of Remote Sensing (대한원격탐사학회지)

Korean Society of Remote Sensing (대한원격탐사학회)
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Inter-comparison of NO2 column densities measured by Pandora and OMI over Seoul, Korea

  • Yun, Seoyeon (Department of Atmospheric Science, Yonsei University) ;
  • Lee, Hanlim (Department of Spatial Information Engineering, Pukyong National University) ;
  • Kim, Jhoon (Department of Atmospheric Science, Yonsei University) ;
  • Jeong, Ukkyo (Department of Atmospheric Science, Yonsei University) ;
  • Park, Sang Seo (Department of Atmospheric Science, Yonsei University) ;
  • Herman, Jay (NASA Goddard Space Flight Center)
  • Received : 2013.12.17
  • Accepted : 2013.12.23
  • Published : 2013.12.31
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Abstract

Total Vertical Column Density (VCD) of $NO_2$, a key component in air quality and tropospheric chemistry was measured using a ground-based instrument, Pandora, in Seoul from March 2012 to October 2013. The $NO_2$ measurements using Pandora were compared with those obtained by satellite remote sensing from Ozone Monitoring Instrument (OMI) where the intercomparison characteristics were analyzed as a function of measurement geometry, cloud amount and aerosol loading. The negative biases of the OMI $NO_2$ VCD were larger when cloud amount and Aerosol Optical Depth (AOD) were higher. The correlation coefficient between $NO_2$ VCDs from Pandora and OMI was 0.53 for the entire measurement period, whereas the correlation coefficient between the two was 0.74 when the cloud amount and AOD were low (cloud amount<3, AOD<0.4). The low bias of OMI data was associated with the shielding effect of the cloud and the aerosols.

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References

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