Global Climate Change Impacts in the United States 2009 Report Legacy site

Uncertainties in the data are an order of magnitude smaller than the trend according to Karl, T.R., J.R. Christy, R.A. Clarke, G.V. Gruza, J. Jouzel, M.E. Mann, J. Oerlemans, M.J. Salinger, and S.-W. Wang, 2001: Observed Climate Variability and Change. In: Climate Change 2001: The Scientific Basis. Contribution of Working Group I to the Third Assessment Report of the Intergovernmental Panel on Climate Change [Houghton, J.T., Y. Ding, D.J. Griggs, M. Noguer, P.J. van der Linden, X. Dai, K. Maskell, and C.A. Johnson (eds.)]. Cambridge University Press, Cambridge, UK and New York, p. 99-181.

Temperature data:
Smith, T.M. and R.W. Reynolds, 2004: Improved extended reconstruction of SST (1854–1997). Journal of Climate, 17(12), 2466-2477.

Jones, P.D., M. New, D.E. Parker, S. Martin, and I.G. Rigor, 1999: Surface air temperature and its changes over the past 150 years. Reviews of Geophysics, 37(2), 173-199.

Carbon dioxide data:
Data from 1974 to present: Tans, P., 2008: Trends in Atmospheric Carbon Dioxide: Mauna Loa. NOAA Earth System Research Laboratory (ESRL). [Web site] http://www.esrl.noaa.gov/gmd/ccgg/trends/. Data available at ftp://cmdl.noaa.gov/ccg/co2/trends/co2_annmean_mlo.txt.

1958-1974 data are from Scripps Institution of Oceanography (Keeling) Mauna Loa Observatory record. http://scrippsco2.ucsd.edu/.

Pre-1958 values are annual points taken from a smooth fit to the Law Dome data: Etheridge, D.M., L.P. Steele, R.L. Langenfelds, R.J. Francey, J.-M. Barnola, and V.I. Morgan, 1996: Natural and anthropogenic changes in atmospheric CO2 over the last 1000 years from air in Antarctic ice and firn. Journal of Geophysical Research, 101(D2), 4115-4128.