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Volume 17, issue 20
Atmos. Chem. Phys., 17, 12533-12552, 2017
https://doi.org/10.5194/acp-17-12533-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.

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

Atmos. Chem. Phys., 17, 12533-12552, 2017
https://doi.org/10.5194/acp-17-12533-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 23 Oct 2017

Research article | 23 Oct 2017

Merged SAGE II, Ozone_cci and OMPS ozone profile dataset and evaluation of ozone trends in the stratosphere

Viktoria F. Sofieva1, Erkki Kyrölä1, Marko Laine1, Johanna Tamminen1, Doug Degenstein2, Adam Bourassa2, Chris Roth2, Daniel Zawada2, Mark Weber3, Alexei Rozanov3, Nabiz Rahpoe3, Gabriele Stiller4, Alexandra Laeng4, Thomas von Clarmann4, Kaley A. Walker5, Patrick Sheese5, Daan Hubert6, Michel van Roozendael6, Claus Zehner7, Robert Damadeo8, Joseph Zawodny8, Natalya Kramarova9,10, and Pawan K. Bhartia9 Viktoria F. Sofieva et al.
  • 1Finnish Meteorological Institute, Helsinki, Finland
  • 2Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Canada
  • 3Institute for Environmental Physics, University of Bremen, Bremen, Germany
  • 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
  • 9NASA Goddard Space Flight Center, Silver Spring, MD, USA
  • 10Science Systems and Applications Inc., Lanham, MD, USA

Abstract. In this paper, we present a merged dataset of ozone profiles from several satellite instruments: SAGE II on ERBS, GOMOS, SCIAMACHY and MIPAS on Envisat, OSIRIS on Odin, ACE-FTS on SCISAT, and OMPS on Suomi-NPP. The merged dataset is created in the framework of the European Space Agency Climate Change Initiative (Ozone_cci) with the aim of analyzing stratospheric ozone trends. For the merged dataset, we used the latest versions of the original ozone datasets. The datasets from the individual instruments have been extensively validated and intercompared; only those datasets which are in good agreement, and do not exhibit significant drifts with respect to collocated ground-based observations and with respect to each other, are used for merging. The long-term SAGE–CCI–OMPS dataset is created by computation and merging of deseasonalized anomalies from individual instruments.

The merged SAGE–CCI–OMPS dataset consists of deseasonalized anomalies of ozone in 10° latitude bands from 90°S to 90°N and from 10 to 50km in steps of 1km covering the period from October 1984 to July 2016. This newly created dataset is used for evaluating ozone trends in the stratosphere through multiple linear regression. Negative ozone trends in the upper stratosphere are observed before 1997 and positive trends are found after 1997. The upper stratospheric trends are statistically significant at midlatitudes and indicate ozone recovery, as expected from the decrease of stratospheric halogens that started in the middle of the 1990s and stratospheric cooling.

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We present a merged dataset of ozone profiles from several satellite instruments: SAGE II, GOMOS, SCIAMACHY, MIPAS, OSIRIS, ACE-FTS and OMPS. For merging, we used the latest versions of the original ozone datasets. The merged SAGE–CCI–OMPS dataset is used for evaluating ozone trends in the stratosphere through multiple linear regression. Negative ozone trends in the upper stratosphere are observed before 1997 and positive trends are found after 1997.
We present a merged dataset of ozone profiles from several satellite instruments: SAGE II,...
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