ISIMIP3b atmospheric composition input data

The Inter-Sectoral Impact Model Intercomparison Project (ISIMIP) provides a framework for the collation of a consistent set of climate impact data across sectors and scales. It also provides a unique opportunity for considering interactions between climate change impacts across sectors through consistent scenarios.<br>The ISIMIP3b part of the third simulation round is dedicated to a quantification of climate-related risks at different levels of global warming and socio-economic change. ISIMIP3b group I simulations are based on historical climate change as simulated in CMIP6 combined with observed historical socio-economic forcing. ISIMIP3b group II simulations are based on climate change according to the CMIP6 future projections combined with socio-economic forcings fixed at 2015 levels. ISIMIP3b group III simulations additionally account for future changes in socio-economic forcing.<br>Globally averaged marine surface annual mean CO₂ [ppm] and CH₄ [ppb] time series for driving climate impact model simulations within ISIMIP3b. On the basis of the ISIMIP3b simulation protocol experiments five time series are provided: a) picontrol and historical (1850-2014), b) ssp126, ssp370 and ssp585 (2015-2100).<br>Version 1.1 of this datasets adds the files for CH₄.