Overheated Arctic update: Nenana ice was gone by this date in 1940, but still 41 inches thick this year

Nenana ice

21-Apr 41.4 Inches

Nenana Ice Classic Breakup dates

20-Apr 1940 1998

2009: River ice in Alaska: “pretty good proxy for climate change in the 20th century” | Watts Up With That?

The Ice Classic has given them a rare, reliable climate history that has documented to the minute the onset of the annual thaw as it shifted across 91 years. By this measure, spring comes to central Alaska 10 days earlier than in 1960, said geophysicist Martin Jeffries at the University of Alaska, Fairbanks — and that trend is accelerating. “The Nenana Ice Classic is a pretty good proxy for climate change in the 20th century,” Dr. Jeffries said.