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1. Latest three days of Real-Time CAMS global daily analysis and forecast data are available through:
   1. the ADS interactive web interface download forms: CAMS global atmospheric composition forecasts
   2. CDS API allowing users to download Global CAMS data in a programmatic way
   3. the FTP dissemination service
2. CAMS Global archived analysis and forecast daily data (6 hourly analysis and 3 hourly up-to 5 days forecast data since 05/07/2012, available with a 5-day delay, approximately 40km horizontal resolution (T511 spectral) on 60 vertical levels from the surface up to 0.1 hPa; increased to 137 levels on 09/07/2019 onwards as part of the IFS cycle 46r1 upgrade - see  Implementation of IFS cycle 46r1  for details).  These data are available for download through:
   1. ADS interactive web interface download forms: CAMS global atmospheric composition forecasts
   2. CDS API allowing users to download Global CAMS data in a programmatic way.
3. CAMS global delayed-mode analyses and real-time forecasts of CO₂ and CH₄: On request only - Contact us
   
   
4. CAMS Global archived reanalysis data (3-hourly and monthly), 2003-20182020, annual releases planned thereafter (i.e. 2019 data available in 2020)releases twice a year with 6 month delay, approximately 80 km (T255 spectral) on 60 vertical levels from the surface up to 0.1 hPa for the analysed species) are available for download through:
   
   • ADS interactive web interface download forms: CAMS global reanalysis (EAC4) 3-hourly data and CAMS global reanalysis (EAC4) monthly averaged fields
   • CDS API allowing users to download Global CAMS data in a programmatic way.
5. CAMS global greenhouse gas reanalysis (EGG4) (3-hourly and monthly), 2003-2020, releases twice a year with 6 month delay, approximately 80 km (T255 spectral) on 60 vertical levels from the surface up to 0.1 hPa for the analysed species) are available for download through:
   • ADS interactive web interface download forms: CAMS global reanalysis (EAC4EGG4) 3-hourly data and CAMS global reanalysis (EAC4EGG4) monthly averaged fields
   • CDS API allowing users to download Global CAMS data in a programmatic way.
6. CAMS Global archived MACC Reanalysis, 2003-2012, approximately 80 km (T255 spectral) on 60 vertical levels from the surface up to 0.1 hPa for the analysed species) are available for download through:
   • the web using the ECMWF data server web interface: http://apps.ecmwf.int/datasets/data/macc-reanalysis/levtype=sfc/ , one month at a time
   • WebAPI, which is the method allowing users to download Global CAMS data in a programmatic way (using Python - example scripts are available).

See What are the changes from the MACC Reanalysis to the CAMS interim Reanalysis, to the CAMS Reanalysis?

1. All CAMS regional European air quality analysis and and forecast daily hourly data(archived since 04/2017 to the presentthree-year rolling archive, approximately 10km horizontal resolution from surface up to 5000m) are available for download either through:
   
   • Atmosphere Data store (ADS) web interface,
   • CDS API service, which is the method allowing users to download Regional CAMS data in a programmatic way (using Python).
2. CAMS regional European air quality reanalyses data are available online (approximately 10km horizontal resolution from surface up to 5000m) are available for download through:
   • the CAMS website (2014-2018),
   • ADS interactive web interface download form (only 2018 for now, please check the schedule for the release of other years in the data documentation): CAMS European air quality reanalyses data
   • CDS API allowing users to download Regional CAMS data in a programmatic way.