CMIP5 Global Climate Change Viewer (GCCV)
Important Notice for Using Climate Projections
Climate projections can be useful for making decisions about the future, but the limitations of climate models make it easy to misinterpret or misuse their results. Be aware that:
- Climate projections are not predictions. Projections are based on assumptions about future human emissions of greenhouse gases and other policy choices.
- Climate projections do not attempt to predict the timing of meteorological events such as storms, droughts, or El Niños. The location and timing of future extreme weather events cannot be deduced from climate model projections.
- Projections vary from model to model: the best projection dataset for one location and purpose may not be the best for other situations. Considering a range of projections may help you gain a more complete picture of potential future risks.
- The increased spatial resolution of statistically downscaled projections available for temperature and precipitation may not be available for all parameters. In addition, increased resolution does not necessarily equate to greater fidelity or reliability.
For decisions involving the use of climate model projections, you may want to consider seeking expertise.
The Global Climate Change Viewer (GCCV) displays future temperature and precipitation changes simulated by global climate models in the Coupled Model Intercomparison Project Phase 5 (CMIP5). Users can view projections for any country, for all available models, and all Representative Concentration Pathways (RCP) emission scenarios. The viewer also provides access to currently available model simulations from the Last Glacial Maximum (21 ka) and mid-Holocene (6 ka) from the Paleoclimate Modelling Intercomparison Project phase 3 (PMIP3).
The GCCV also provides access to plots and quantile breakdowns of monthly temperature and precipitation from 1850-2100. Data from the experiments are binned into 25-year climatologies that span the 21st century.
The primary data on which the GCCV is based can be downloaded in NetCDF format using the Earth System Grid Federation (ESGF) data portal. The GCCV application only includes models with unrestricted access, which is a subset of all models available through the ESGF data portal.