explanation of what a temperature anomaly graph
As promised, a quick look at what temperature anomalies are and why we use them. A temperature anomaly is the variation between a particular temperature for a particular station and a particular month, and the average for that month for a selected baseline period.These baseline periods are different for each of the four datasets which I present.For instance, HADCRUT use 1961-90 as their baseline. temperature anomaly is the variation between a particular temperature for a particular station and a particular month, and the average for that month for a selected baseline period.