Preprints
https://doi.org/10.5194/amt-2022-313
https://doi.org/10.5194/amt-2022-313
 
24 Nov 2022
24 Nov 2022
Status: this preprint is currently under review for the journal AMT.

Updated merged SAGE - CCI- OMPS+ dataset for evaluation of ozone trends in the stratosphere

Viktoria F. Sofieva1, Monika Szelag1, Johanna Tamminen1, Carlo Arosio2, Alexei Rozanov2, Mark Weber2, Doug Degenstein3, Adam Bourassa3, Daniel Zawada3, Michael Kiefer4, Alexandra Laeng4, Kaley A. Walker5, Patrick Sheese5, Daan Hubert6, Michel van Roozendael6, Christian Retscher7, Robert Damadeo8, and Jerry D. Lumpe9 Viktoria F. Sofieva et al.
  • 1Finnish Meteorological Institute, Helsinki, Finland
  • 2Institute for Environmental Physics, University of Bremen, Bremen, Germany
  • 3Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Canada
  • 4Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Karlsruhe, Germany
  • 5Department of Physics, University of Toronto, Toronto, Canada
  • 6Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium
  • 7ESA/ESRIN, Frascati, Italy
  • 8NASA Langley Research Center, Hampton, VA, USA
  • 9Computational Physics Inc., Boulder, CO, USA

Abstract. In this paper, we present the updated SAGE-CCI-OMPS+ climate data record of monthly zonal mean ozone profiles. This dataset covers the stratosphere and combines measurements by 9 limb and occultation satellite instruments – SAGE II, OSIRIS, MIPAS, SCIAMACHY, GOMOS, ACE-FTS, OMPS-LP, POAM III and SAGE III/ISS. Compared to the original version of the SAGE-CCI-OMPS dataset (Sofieva et al., 2017), the update includes new versions of MIPAS, ACE-FTS, and OSIRIS datasets, and introduces data from additional sensors (POAM III, SAGE III/ISS) and retrieval processors (OMPS-LP).

In the paper, we show detailed intercomparisons of ozone profiles from different instruments and data versions, with a focus on the detection of possible drifts in the datasets. The SAGE-CCI-OMPS+ dataset has a better coverage of polar regions and of the upper troposphere and the lower stratosphere (UTLS) than the SAGE-CCI-OMPS dataset.

We also studied the influence of including new datasets on ozone trends, which are estimated using multiple linear regression. The changes in the merged dataset do not change the overall morphology of post-1997 ozone trends: statistically significant trends are observed in the upper stratosphere. The largest changes in ozone trends are observed in polar regions, especially in the Southern Hemisphere.

The updated SAGE-CCI-OMPS+ dataset contains profiles of deseasonalized anomalies and ozone concentrations from 1984 to 2021, in 10° latitude bins from 90° S to 90° N, and in the altitude range from 10 km to 50 km. The dataset is in open access at https://climate.esa.int/en/projects/ozone/data/ and at ftp://cci_web@ftp-ae.oma.be/esacci (ESA Climate Office, last access: 10 August 2022).

Viktoria F. Sofieva et al.

Status: open (until 02 Jan 2023)

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Viktoria F. Sofieva et al.

Viktoria F. Sofieva et al.

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Short summary
The paper presents the updated SAGE-CCI-OMPS+ climate data record of monthly zonal mean ozone profiles. This dataset covers the stratosphere and combines measurements by 9 limb and occultation satellite instruments – SAGE II, OSIRIS, MIPAS, SCIAMACHY, GOMOS, ACE-FTS, OMPS-LP, POAM III and SAGE III/ISS. The update includes new versions of MIPAS, ACE-FTS, and OSIRIS datasets, and introduces data from additional sensors (POAM III, SAGE III/ISS) and retrieval processors (OMPS-LP).