Data Distribution Centre

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Linked datasets

The IPCC DDC has implemented a procedure for evaluating datasets held at other sites and linking to those that satisfy a range of criteria on quality, relevance to the IPCC and usefulness to the users of the DDC. A full specification of the process is given provided in the linking criteria specification. The process starts with the completion of a questionnaire (spreadsheet). Links to datasets which pass are posted throughout the site. This page gives a comprehensive list, together with the completed questionnaires and associated evaluation reports.


International Comprehensive Ocean-Atmosphere Data Set (ICOADS); assessment; September, 2012;

Global Historic Climatology Network - Monthly (GHCN-M); assessment; September, 2012;

Historical Anthropogenic Sulfur Dioxide Emission (HASO2); assessment; May, 2013;

HYDE Land Use; assessment; May, 2013;

Land use harmonization; assessment; September, 2012;

Mauna Loa CO2; assessment; September, 2012;

Hadley Centre and Climate Research Unit monthly global surface humidity (HadDRUH); assessment; September, 2014;

Emissions Database for Global Atmospheric Research (EDGAR); assessment; December, 2014;

Extended Reconstructed Sea Surface Temperature (ERSST); assessment; December, 2014;

E-Obs Gridded Data; assessment; March, 2017;

Global Historical Climatology Network -Daily (GHCND); assessment; December, 2014;

Global Precipitation Climatology Centre (GPCC) [from rain guages]; assessment; December, 2014;

Global Precipitation Climatology Project (GPCP) [from satellite]; assessment; December, 2014;

NOAA Merged Land-Ocean Surface Temperature Analysis (MLOST); assessment; December, 2014;

Model data

IAMC RCP Database; assessment; September, 2012;

WCRP Coupled Model Intercomparison Project, Phase 5; assessment; September, 2012;


NCEP Re-analysis Data; assessment; September, 2012;

ECMWF 40 Year Re-analysis (ECMWF ERA-40); assessment; September, 2014;

ECMWF Interim Re-analysis (ECMWF ERA-Int); assessment; September, 2014;

Japanese 55-year ReAnalysis (JRA-55); assessment; September, 2014;

Modern Era Retrospective-analysis for Research and Applications (MERRA); assessment; September, 2014;

National Centers for Environmental Prediction (NCEP) and Climate Forecast System Reanalysis (CSFR) data (NCEP-CFSR); assessment; September, 2014;

NCEP-DOE Reanalysis 2 project (NCEP-DOE R2); assessment; September, 2014;

NOAA CIRES Twentieth Century Global Reanalysis Version (NOAA_CIRES20thC_ReaV2); assessment; September, 2014;