Institute for Climate and Atmospheric Science (ICAS)

Physical Climate Change Projects

IPCC AR5: Intergovernmental Panel on Climate Change Reports

Our research extensively features in Intergovernmental Panel on Climate Change Reports. Piers Forster was Coordinating Lead Author for the radiative forcing chapter in the IPCC fourth assessment report (link) and is currently lead author of the clouds and aerosol chapter in the IPCC's fifth assessment report, due out in 2014.

Forcing from CMIP5 and CMIP3 climate models

Past and future simulations of climate change rely on accurate knowledge of climate change drivers. It is useful do evaluate changes in these forcing agents by the radiative/climate forcing, measured by a Wm-2 perturbation to the Earth's energy budget.  In Forster and Taylor (2006) and Forster et al. (2013) we developed and used a simple two step process to evaluate global-mean shortwave and longwave climate forcings, using standard diagnostics from climate model data submitted to the CMIP3 or CMIP5 archives.

Read the papers and get the forcing data here. Please contact me if you use them!  


Forster, Piers, M., Karl E. Taylor, 2006: Climate Forcings and Climate Sensitivities Diagnosed from Coupled Climate Model Integrations. J. Climate, 19, 6181–6194. doi:

ASCII Text Table of Solar Forcings
ASCII Text Table of Shortwave Forcings (including solar forcing)
ASCII Text Table of Longwave Forcings
ASCII Text Table of Net Forcings


Forster, P. M., T. Andrews, P. Good, J. M. Gregory, L. S. Jackson, and M. Zelinka (2013), Evaluating adjusted forcing and model spread for historical and future scenarios in the CMIP5 generation of climate models, J. Geophys. Res. Atmos., 118, doi:10.1002/jgrd.50174 (should be open access)

Excel spreadsheet for all scenarios

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