dataset · Global

Gridded monthly climate projection dataset underpinning the IPCC AR6 Interactive Atlas

This catalogue entry provides gridded data from global (CMIP5 and CMIP6) and regional (CORDEX) projections for the set of 22 variables and indices included in the IPCC Interactive Atlas, a novel contribution from Working Group I (WGI) to the IPCC Sixth Assessment Report (AR6). These variables and indices are relevant for the climatic impact-drivers used in the regional assessments conducted in AR6 (Chapters 10, 11, 12 and Atlas), related to heat and cold, wet and dry, snow and ice, and wind. Thi

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Source details

Licence: CC-BY-4.0

Evidence quality: 35.1

Listed in cds public catalogue API on 2026-10-16; relevance/value screened (haiku).

Metadata checked: 2026-10-14T13:20:00.000Z

What's in it

Data offered docs-verified: annual consecutive dry days · annual cooling degree-days · annual heating degree-days · monthly count of days with maximum temperature above 35 °C · monthly count of days with maximum temperature above 40 °C · bias-adjusted (ISIMIP3) monthly count of days above 35 °C and 40 °C · monthly count of frost days · monthly maximum 1-day and 5-day accumulated precipitation · monthly mean daily accumulated precipitation · monthly mean daily accumulated snowfall · monthly mean daily mean wind speed · monthly mean sea surface temperature · monthly mean sea-ice area percentage · monthly mean seawater pH · standardized precipitation index (SPI) for 6-month cumulation
Coverage docs-verified: Global (CMIP5, CMIP6), 11 regional domains (CORDEX) · 1850–1900 (pre-industrial) and 1950–2100 (recent-past historical/projection)
Resolution docs-verified: Horizontal: CMIP5 2°x2°, CMIP6 1°x1°, CORDEX 0.5°x0.5° (EURO-CORDEX 0.25°x0.25°); temporal: monthly or annual
Update frequency docs-verified: None planned (frozen AR6 version)
Formats docs-verified: NetCDF4
Access docs-verified: CC-BY-4.0 licence (open); Climate Data Store Login/Register shown on the page

Useful for

Use cases llm-inferred: Regional temperature and precipitation change maps for a client's national or subnational area, reproducing IPCC Atlas products · Drainage strategy climate-change screening using monthly maximum 1-day and 5-day precipitation projections · Heating and cooling degree-day screening for building energy and overheating assessments · Drought screening for water-resources planning using 6-month SPI projections
Audience llm-inferred: hydrologists · drainage engineers · civils engineers · climate risk consultants · planners · GIS analysts

Limitations

Constraints docs-verified: Frozen AR6 version with no updates planned · CORDEX is fully reproducible from the CDS but CMIP is not; some CMIP models and versions differ from the Atlas ensembles · Monthly or annual temporal resolution only (computed from daily data) · Eleven regional CORDEX domains only; other regions rely on global CMIP grids at 1° or 2°

Evidence

Check upstream coverage, uncertainty and licence before use. Station observations are not forecasts or design levels.