The Hockeystick Surfaces on the BBC
Temperature for the last 1,500 years is taken from Mann, M.E., Zhang, Z., Hughes, M.K., Bradley, R.S., Miller, S.K., Rutherford, S., Proxy-Based Reconstructions of Hemispheric and Global Surface Temperature Variations over the Past Two Millennia, Proc. Natl. Acad. Sci., 105, 13252-13257, 2008.
For the final time period covered, the temperature data is sourced to the Met Office Hadley Centre and to the Climatic Research Unit at the University of East Anglia.
Download the climate data below
CO2 and temperature data for the last 800,000 years [Excel, 84.5kb]
CO2 and temperature data from 1850 [Excel, 53.5kb]