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Volume 10, issue 9 | Copyright

Special issue: Quadrennial Ozone Symposium 2016 – Status and trends...

Atmos. Meas. Tech., 10, 3539-3545, 2017
https://doi.org/10.5194/amt-10-3539-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 27 Sep 2017

Research article | 27 Sep 2017

Ozone comparison between Pandora #34, Dobson #061, OMI, and OMPS in Boulder, Colorado, for the period December 2013–December 2016

Jay Herman1, Robert Evans2,*, Alexander Cede3, Nader Abuhassan1, Irina Petropavlovskikh4,5, Glenn McConville4,5, Koji Miyagawaa, and Brandon Noirot4,5 Jay Herman et al.
  • 1University of Maryland Baltimore County (JCET) at Goddard Space Flight Center, Greenbelt, MD, USA
  • 2NOAA/ESRL/GMD, Boulder, CO, USA
  • 3LuftBlick, Austria and Goddard Space Flight Center, Greenbelt, MD, USA
  • 4NOAA Earth System Research Laboratory, Boulder, CO, USA
  • 5Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado, Boulder, CO, USA
  • avisiting scientist at: at NOAA/ESRL/GMD, Boulder, CO, USA
  • *retired

Abstract. A one-time-calibrated (in December 2013) Pandora spectrometer instrument (Pan #034) has been compared to a periodically calibrated Dobson spectroradiometer (Dobson #061) co-located in Boulder, Colorado, and compared with two satellite instruments over a 3-year period (December 2013–December 2016). The results show good agreement between Pan #034 and Dobson #061 within their statistical uncertainties. Both records are corrected for ozone retrieval sensitivity to stratospheric temperature variability obtained from the Global Modeling Initiative (GMI) and Modern-Era Retrospective analysis for Research and Applications (MERRA-2) model calculations. Pandora #034 and Dobson #061 differ by an average of 2.1±3.2% when both instruments use their standard ozone absorption cross sections in the retrieval algorithms. The results show a relative drift (0.2±0.08%yr−1) between Pandora observations against NOAA Dobson in Boulder, CO, over a 3-year period of continuous operation. Pandora drifts relative to the satellite Ozone Monitoring Instrument (OMI) and the Ozone Mapping Profiler Suite (OMPS) are +0.18±0.2%yr−1 and −0.18±0.2%yr−1, respectively, where the uncertainties are 2 standard deviations. The drift between Dobson #061 and OMPS for a 5.5-year period (January 2012–June 2017) is −0.07±0.06%yr−1.

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A co-located Pandora Spectrometer Instrument (Pan #034) has been compared to a well-calibrated Dobson spectroradiometer (Dobson #061) in Boulder, Colorado, and with two satellite instruments over a 3-year period. The results show good agreement between Pa n#034 and Dobson #061 and with the satellite data within their statistical uncertainties.
A co-located Pandora Spectrometer Instrument (Pan #034) has been compared to a well-calibrated...
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