More Year-End Results
The UKMO-Hadley Centre presented its annual HADCRUT4 data a few days ago. The HADCRUT4 annual global land+ocean surface temperature anomalies for 2013 ranked 8th. That’s not much of a showing in a world where manmade greenhouse gases are assumed to be the control knob that regulates global surface temperatures.
Figure 1 presents a comparison of GISS LOTI, NCDC and HADCRUT4 annual global land+ocean surface temperature anomalies for the period of 1979 to 2013. Because all three suppliers use different base years, I’ve shifted them to 1981 to 2010 (base years recommended by the WMO) for the comparison. The halt in global warming is becoming more evident in the annual data. But the cessation of surface warming stands out like a sore thumb in the comparison of the monthly data, Figure 2.
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Figure 3 presents the monthly HADCRUT4 data from January 1979 through December 2013 with its standard base years of 1961 to 1990. The value for December was approximately +0.49 deg C, which is a drop of about -0.1 deg C since November.
For further information about the three datasets, refer to the most recent monthly update.