Deviations of the land N hemisphere temperature anomaly from the 5 yr averages

  One can plot the deviation of the NOAA land northern hemisphere temperature anomalies from the 5 year averages. Since the number of averages is less than the number of years for which there is data the dataset for the anomaly has to be reduced so that we are working with the points corresponding to the years of the midpoints for the 5 year average.

The distribution about the 5 year averages appears to be a normal distribution and shows how much natural variation there is in the temperature anomalies. Twenty equal intervals were used to get the histogram data.