Paul Douglas begins his post on the Minnesota heatwave with this Kevin Trenberth quote:
“…Some of the human-induced changes are occurring 100 times faster than they occur in nature,” Trenberth says. “And this is one of the things that worries me more than climate change itself. It’s actually the rate of change that’s most worrying…” – NCAR climate scientist Kevin Trenberth in a recent NPR article; details below.
Douglas then goes on to note:
Here comes a record-setting late-season heat wave; afternoon highs may reach 95-100F. According to the local National Weather Service this may well be the hottest Minnesota State Fair since 1948, when we endured 4 days hotter than 94F at the State Fair.
So why was it so hot in 1948 — about 100 ppm CO2 ago?