1) Last 1000 Years: Mann et al., 1999 Northern Hemisphere Temperature Reconstruction for the Past Millennium. LAST UPDATE: 3/1999 (Original Receipt by WDCA Paleo). IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 1999-014 SUGGESTED DATA CITATION: Michael E. Mann, Raymond S. Bradley, and Malcolm K. Hughes, 1999, Northern Hemisphere Temperature Reconstruction for the Past Millennium, IGBP PAGES/World Data Center-A for Paleoclimatology Data Contribution Series # 1999-014. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. The data are published at http://www.ngdc.noaa.gov/paleo/. 2) Projections (2000 - 2100) Data from IPCC - Intergovernmental Panel on Climate Change (2001): Climate change 2001: the scientific basis.
See further: Mann, M.E., Bradley, R.S. and Hughes, M.K. (1999): 'Northern hemisphere temperatures during the past millennium: inferences, uncertainties, and limitations', Geophysical Research Letters, 26 (the last hundred years); IPCC (2001a): Climate change 2001: The scientific basis, Cambridge University Press, Cambridge, UK (projection for the next hundred years).