Source: Original research Letter in Nature (April 11, 2013).
- Background: Although it has been known that Northern latitudes have had extreme temperature highs, it is difficult to prove that those are higher than any in the past.
- Methods: Use hierarchical Bayesian approach…(?)
- Results: Recent years have the highest extremes, and approx. 0 lowest extremes. The past 20yrs are 1.16C higher than the past 600yrs average. It seems that these are due to an increase in temperature average, and not in a change in the variation of temperature around each years’ averages.
- Details: Whole space average for summers of previous 600 yrs. Summer of 2010 was highest for western Russia (P>0.99) and probably Greenland and Canadian arctic (P>0.90).
