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ECMWF ERA-Interim: monthly ozone climatology source data from satellite and ozonesondes (1966-1993)

Update Frequency: Not Planned
Latest Data Update: 2016-03-14
Status: Completed
Online Status: ONLINE
Publication State: Published
Publication Date: 2016-12-22
Download Stats: last 12 months
Dataset Size: 2 Files | 34KB


This monthly ozone climatology dataset was produced from a combination of satellite and ozonesonde data from 1966 to 1993. It was produced following the method described by Fortuin and Langematz (1994) and is used by the radiation code within the ECMWF IFS to generate the output from from ERA-Interim reanalysis model runs (see Dee et al. 2011 for further details).

The ozone values are given in ppmv on 36 vertical pressure levels and 19 latitudinal bands. These are then internally interpolated to the grid used by the model before entering the radiation scheme.

The 19 latitudinal bands the data are present are at: -90, -80, -70, -60, -50, -40, -30, -20, -10, 0, 10, 20, 30, 40, 50, 60, 70, 80, 90 degrees.

The climatology was originally produced by Fortuin and Langematz (1994) in response to the many GCMs at that time that used a prescribed ozone field. The aim was to generate a reference field with the required spatial and temporal coverage for use within modelling studies.

Citable as:  European Centre for Medium-Range Weather Forecasts; Bozzo, A. (2016): ECMWF ERA-Interim: monthly ozone climatology source data from satellite and ozonesondes (1966-1993). Centre for Environmental Data Analysis, date of citation.
Abbreviation: Not defined
Keywords: ECMWF, ERA, Interim, reanalysis, surface, model, Gaussian, N256, analysis


Previous Info:
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Previously used record identifiers:
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Access rules:
Access to these data is available to any registered CEDA user. Please Login or Register for an account to gain access.
Use of these data is covered by the following licence: When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.
Data lineage:

Data are generated by the ERA-Interim project team at European Centre for Medium-Range Weather Forecasts (ECMWF) as part of the input into the ECMWF IFS. These data were then extracted from the ECMWF system by Alessio Bozzo at ECMWF and sent to Alison Ming, University of Cambridge, for preparation before submission to Centre for Environmental Data Analysis (CEDA) for ingestion into the archive.

Data Quality:
ECMWF produced these original data and verified the climatology before inclusion into their ECMWF IFS system as part of the source data for the ERA Interim modelling runs.
File Format:
Data are NetCDF formatted.

Process overview

This dataset was generated by the computation detailed below.

ECMWF ERA-Interim Re-analysis Model deployed on ECMWF Computer


This computation involved: ECMWF ERA-Interim Re-analysis Model deployed on ECMWF Computer. The data assimilation system used to produce ERA-Interim is based on a 2006 release of the IFS (Cy31r2). The system includes a 4-dimensional variational analysis (4D-Var) with a 12-hour analysis window. The spatial resolution of the data set is approximately 80 km (T255 spectral) on 60 vertical levels from the surface up to 0.1 hPa.

Input Description


Output Description


Software Reference


  • var_id: OZO
  • long_name: Ozone
  • gcmd_url:
  • gcmd_keyword: EARTH SCIENCE > Atmosphere > Atmospheric Chemistry/Oxygen Compounds > Ozone
  • names: EARTH SCIENCE > Atmosphere > Atmospheric Chemistry/Oxygen Compounds > Ozone,
  • var_id: lat
  • units: deg N
  • units: hPa
  • var_id: lev
  • var_id: month

Co-ordinate Variables

Temporal Range
Start time:
End time:
Geographic Extent