Branched from 20th century CESM1-CAM5-BGC Large Ensemble with RCP8.5 forcing, but aerosols fixed at 2005 values. Citation: Xu, Y., J.-F. Lamarque, and B. M. Sanderson (2015), The importance of aerosol scenarios in projections of future heat extremes, Climatic Change, 1–14, doi:10.1007/s10584-015-1565-1.