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https://doi.org/10.5194/acp-2020-1117
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-1117
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  11 Nov 2020

11 Nov 2020

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This preprint is currently under review for the journal ACP.

Measurement report: Regional trends of stratospheric ozone evaluated using the MErged GRIdded Dataset of Ozone Profiles (MEGRIDOP)

Viktoria F. Sofieva1, Monika Szelag1, Johanna Tamminen1, Erkki Kyrölä1, Doug Degenstein2, Chris Roth2, Daniel Zawada2, Alexei Rozanov3, Carlo Arosio3, John P. Burrows3, Mark Weber3, Alexandra Laeng4, Gabriele Stiller4, Thomas von Clarmann4, Lucien Froidevaux5, Nathaniel Livesey5, Michel van Roozendael6, and Christian Retscher7 Viktoria F. Sofieva et al.
  • 1Finnish Meteorological Institute, Helsinki, Finland
  • 2Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Canada
  • 3Institute of Environmental Physics, University of Bremen, Bremen, Germany
  • 4Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Karlsruhe, Germany
  • 5Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
  • 6Royal Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium
  • 7ESA/ESRIN, Frascati, Italy

Abstract. In this paper, we present the MErged GRIdded Dataset of Ozone Profiles (MEGRIDOP) in the stratosphere with a resolved longitudinal structure, which is derived from data by six limb and occultation satellite instruments: GOMOS, SCIAMACHY and MIPAS on Envisat, OSIRIS on Odin, OMPS on Suomi-NPP, and MLS on Aura. The merged dataset was generated as a contribution to the European Space Agency Climate Change Initiative Ozone project (Ozone_cci). The period of this merged time series of ozone profiles is from late 2001 until the end of 2018.

The monthly mean gridded ozone profile dataset is provided in the altitude range from 10 to 50 km in bins of 10° latitude × 20° longitude. The merging is performed using deseasonalized anomalies. The created MEGRIDOP dataset can be used for analyses, which probe our understanding of stratospheric chemistry and dynamics. To illustrate some possible areas of applications, we created the climatology of ozone profiles with resolved longitudinal structure. We found zonal asymmetry/structures in the climatological ozone profiles at middle and high latitudes associated with the polar vortex. At Northern high latitudes, the amplitude of the seasonal cycle also has a longitudinal dependence.

The MEGRIDOP dataset has been also used to evaluate regional vertically-resolved ozone trends in the stratosphere, including polar regions. It is found that stratospheric ozone trends exhibit longitudinal structures at Northern Hemisphere middle and high latitudes, with enhanced trends over Scandinavia and Atlantic region. This agrees well with previous analyses and might be due to changes in dynamic processed related to the Brewer-Dobson circulation.

Viktoria F. Sofieva et al.

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The MErged GRIdded Dataset of Ozone Profiles is the long-term (2001–2018) stratospheric ozone profile climate data record with the resolved longitudinal structure, which combines the data from six limb satellite instruments. The dataset can be used various analyses, some of them are discussed in the paper. In particular, regional and vertically resolved ozone trends are evaluated, including the trends in polar regions.
The MErged GRIdded Dataset of Ozone Profiles is the long-term (2001–2018) stratospheric ozone...
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