The effect of uncertainties in natural forcing records on simulated temperature during the last millennium

This paper benefitted from discussion at events of the Past Global Changes (PAGES) working group “Volcanic Impacts on Climate and Society” (VICS). We acknowledge the World Climate Research Programme's Working Group on Coupled Modelling, which is responsible for CMIP, and thank all the climate modelling groups for producing and making available their model output. We acknowledge the Northern Hemisphere Tree-Ring Network Development (N-TREND), Past Global Changes (PAGES) project and the other authors of proxy reconstructions for providing publicly available data. We thank Karsten Haustein for developing and sharing the code for his impulse response model.