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Intergovernmental Panel on Climate Change Working Group I:
The Physical Science Basis of Climate Change
Chapter 6, Palaeoclimate, Box 6.4, Figure 1.

Box 6.4, Figure 1.

Download Data from the WDC Paleo archive:

smoothed (as plotted) 		Box 6.4, Figure 1.
The heterogeneous nature of climate during the 'Medieval Warm Period' is illustrated by the wide spread of values exhibited by the individual records that have been used to reconstruct NH mean temperature. These consist of individual, or small regional averages of, proxy records collated from those used by Mann and Jones (2003), Esper et al. (2002) and Luckman and Wilson (2005), but exclude shorter series or those with no evidence of sensitivity to local temperature. These records have not been calibrated here, but each has been smoothed with a 20-year filter and scaled to have zero mean and unit standard deviation over the period 1001 to 1980.
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