Download - CT2011_oi
CarbonTracker provides access to the following model and observational data. Please read the CarbonTracker usage policy before using our data.

CarbonTracker data are provided in CF-compliant netCDF file format. Read about the CF specification here. Standard netCDF software may be downloaded from the UCAR netCDF site. Users may find the NASA/GISS Panoply NetCDF Viewer helpful for working with CarbonTracker NetCDF files.

  • CO2 Mole Fractions
    This is a link to our FTP server, where we have made 3-hourly 3-D CO2 mole fraction fields available in NetCDF format for others to use in their work. Images of the contents of these files are included on the website under CO2 Weather.

  • Surface CO2 Fluxes
    This is a link to our FTP server, where we have made 3-hourly global surface fluxes available in NetCDF format for others to use in their work. Images of the contents of these files can be found on our Preprocessed Observations
    This is a link to our FTP server, where the observations as they have been preprocessed for use in the CarbonTracker assimilation system are available in NetCDF format. Images of the contents of these files are included on the website under CO2Time Series. Please note that pre-processed data are NOT actual data. Users should contact the original data providers for access to the actual observations. Please refer to Collaborators for contact information.

  • Source Code
    This is a link to the CarbonTracker source code. The main body of CarbonTracker is the TM5 two-way nested model written in Fortran-90. Additional data needed to run CarbonTracker yourself can be made available upon request.

  • Auxiliary information
    • regions.nc defines our inversion regions.
    • postagg_definitions.nc defines the set of "extended" regions formed by post-aggregation from the 22 TransCom regions.

  • Archives
    This is a link to the CarbonTracker Archive that includes 3-D mole fractions, weekly fluxes, source code, web figures, and documentation from previous releases.


  • ObsPack - NOAA's new data delivery system

  • NOAA ESRL Observations
    This is a link to our FTP server, where all NOAA ESRL atmospheric CO2 observations are available in text file format.

    The NOAA ESRL Carbon Cycle Interactive Atmospheric Data Visualization (IADV) website is a data exploration tool that allows users to
    • view all data including near real-time preliminary measurement results.
    • obtain details about each sampling location.
    • manipulate and compare NOAA ESRL data sets.
    • create custom graphs.
    • view their plots on-line with an option to save figures locally for later use.

  • Other Observations
    Users interested in obtaining other observational data used in CarbonTracker should directly contact the measurement laboratory. CarbonTracker collaborators are listed in Collaborators.