Good illustration, though with one (off topic a bit) caveat: IMO, using tree rings as proxy for temps has low validity except where a tree species is near the northern or southern edge of its range. Growing season moisture seem to have a far greater effect. I've measured a small number (currently 10) of trees at 2-week intervals both where I now live and when we were in Gardiner, and have seen little correlation between growth and temp, large correlation between growth and precip. In 1995, hottest JJA of my 13 in Gardiner, RA was scarce between mid June and mid Sept and diameter growth stopped in midsummer on most of the 6 trees I was measuring there, then had a bit of late September growth at a time when other seasons showed growth was ended. Last year had the lowest growth of my 9 seasons of measurements here, and had only bits of RA between mid July and Sept 30. Anecdotal and small sample size, but other Maine foresters/researchers also noted the reduced growth and vigor of white pine due to the 1995 drought. (Current growth rates are confounded by the effect of needlecast fungi in many places.)