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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
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Discussion papers | Copyright
https://doi.org/10.5194/amt-2018-209
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 31 Jul 2018

Research article | 31 Jul 2018

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This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

Trend Quality Ozone from NPP OMPS: the Version 2 Processing

Richard McPeters1, Stacey Frith2, Natalya Kramarova1, Jerry Ziemke3, and Gordon Labow2 Richard McPeters et al.
  • 1NASA Goddard Space Flight Center, Greenbelt, Maryland, USA
  • 2Science Sy stems and Applications Inc., Lanham, Maryland, USA
  • 3Morgan State University, Baltimore, Maryland, USA

Abstract. A version 2 processing of data from two ozone monitoring instruments on Suomi NPP, the OMPS nadir ozone mapper and the OMPS nadir ozone profiler, has now been completed. The previously released data were useful for many purposes but were not suitable for use in ozone trend analysis. In this processing, instrument artifacts have been identified and corrected, an improved scattered light correction and wavelength registration have been applied, and soft calibration techniques were implemented to produce a calibration consistent with data from the series of SBUV/2 instruments. The result is a high quality ozone time series suitable for trend analysis. Total column ozone data from the OMPS nadir mapper now agree with data from the SBUV/2 instrument on NOAA 19 with a zonal average bias of −0.2% over the 60°S to 60°N latitude zone. Differences are somewhat larger between OMPS nadir profiler and N19 total column ozone, with an average difference of −1.1 % over the 60°S to 60°N latitude zone and a residual seasonal variation of about 2% at latitudes higher than about 50 degrees. For the profile retrieval, zonal average ozone in the upper stratosphere (between 2.5 and 4hPa) agrees with that from NOAA 19 within ±3% and an average bias of −1.1%. In the lower stratosphere (between 25 and 40hPa) agreement is within ±3% with an average bias of +1.1%. Tropospheric ozone produced by subtracting stratospheric ozone measured by the OMPS limb profiler from total column ozone measured by the nadir mapper is consistent with tropospheric ozone produced by subtracting stratospheric ozone from MLS from total ozone from the OMI instrument on Aura. The agreement of tropospheric ozone is within 10% in most locations.

Richard McPeters et al.
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Status: final response (author comments only)
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Richard McPeters et al.
Richard McPeters et al.
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Short summary
A version 2 processing of data from OMPS nadir ozone mapper and nadir ozone profiler on Suomi NPP has now been completed. Total column ozone data from the OMPS nadir mapper now agree with data from the SBUV/2 instrument on NOAA 19 with a zonal average bias of −0.2 % over the 60° S to 60° N latitude zone. For the profile retrieval, zonal average ozone in the upper stratosphere (between 2.5 and 4 hPa) agrees with that from NOAA 19 within ±3% and an average bias of −1.1 %.
A version 2 processing of data from OMPS nadir ozone mapper and nadir ozone profiler on Suomi...
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