FIGURE 3. Estimated probability density functions (PDFs) for equilibrium climate sensitivity to CO2 doubling (in K).
From the following article:
Climate sensitivity constrained by temperature reconstructions over the past seven centuries
Gabriele C. Hegerl, Thomas J. Crowley, William T. Hyde and David J. Frame
Nature 440, 1029-1032 (20 April 2006)
doi:10.1038/nature04679
a, PDFs from a range of palaeoreconstructions using data to 1850 (dotted lines, based on rescaled data). The horizontal bars indicate the 5–95% range of PDFs (median is indicated by a dot, and 10th and 90th percentiles by a vertical bar). b, Comparison to other estimates of climate sensitivity based on instrumental data3,4,6,7 over the twentieth century or 1950–20008. All PDFs have been scaled to integrate to 1 between 0 and 10 for better comparison. c, Combined estimate using a result from instrumental data8 as prior distribution, updated by the result from pre-industrial data ('w.p.').
