NASA/GISS/GISTEMP v.3
https://data.giss.nasa.gov/gistemp/graphs_v3/
HardCRUT 4.6.0.0
https://www.metoffice.gov.uk/hadobs/hadcrut4/data/current/download.html
CMIP5 multi-modal mean scenarios
https://climexp.knmi.nl/cmip5_indices.cgi?id=someone@somewher
M. Meinshausen, S. Smith et al. (2011) “The RCP GHG concentrations and their extension from 1765 to 2300”