Preprints
https://doi.org/10.5194/amt-2021-61
https://doi.org/10.5194/amt-2021-61

  25 Mar 2021

25 Mar 2021

Review status: this preprint is currently under review for the journal AMT.

Total ozone column retrieval from OMPS-NM measurements

Andrea Orfanoz-Cheuquelaf, Alexei Rozanov, Mark Weber, Carlo Arosio, Annette Ladstätter-Weißenmayer, and John P. Burrows Andrea Orfanoz-Cheuquelaf et al.
  • Institute of Environmental Physics, University of Bremen, Otto-Hahn-Allee 1, D-28359 Bremen, Germany

Abstract. A scientific total ozone column product from the Ozone Mapping and Profiler Suite Nadir Mapper (OMPS-NM) observations and its retrieval algorithm are presented. The retrieval employs the Weighting Function Fitting Approach (WFFA), a modification of the Weighting Function Differential Optical Absorption Spectroscopy (WFDOAS) technique. The total ozone columns retrieved with WFFA are in very good agreement with other datasets. A mean difference of 0.6 % with respect to ground-based Brewer and Dobson measurements is observed. Seasonal and latitudinal variations are well represented and in agreement with other satellite datasets. The comparison of our product with the scientific product of OMPS-NM indicate a mean bias of around 0.1 %. The comparison with the Tropospheric Monitoring Instrument products (S5P/TROPOMI) OFFL and WFDOAS, shows a persistent negative bias of about −0.5 % for OFFL and –2 % for WFDOAS. Larger differences are only observed in the polar regions. This data product is intended to be used for trend analysis and the retrieval of tropospheric ozone combined with the OMPS limb profiler data.

Andrea Orfanoz-Cheuquelaf et al.

Status: open (until 20 May 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on amt-2021-61', Colin Seftor, 05 Apr 2021 reply

Andrea Orfanoz-Cheuquelaf et al.

Andrea Orfanoz-Cheuquelaf et al.

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Short summary
OMPS/NPP (2012–present) allows obtaining tropospheric ozone column by combining ozone data from limb and nadir observations from the same instrument platform. In a first step, the retrieval of total ozone column from OMPS Nadir Mapper using the Weighting Function Fitting Approach (WFFA) is described here. The OMPS total ozone was compared with ground-based and other satellite measurements, showing agreement within 2 %.