September 30, 2012

High-Arctic Heat Tops 1,800-Year High, Says Study

Modern Spike Outmatches Naturally Driven ‘Medieval Warm Period'

Summers on the Norwegian archipelago of Svalbard are now warmer than at any other time in the last 1,800 years, including during medieval times when parts of the northern hemisphere were as hot as, or hotter, than today, according to a new study in the journal Geology.

“The Medieval Warm Period was not as uniformly warm as we once thought--we can start calling it the Medieval Period again,” said the study’s lead author, William D’Andrea, a climate scientist at Columbia University’s Lamont-Doherty Earth Observatory. “Our record indicates that recent summer temperatures on Svalbard are greater than even the warmest periods at that time.”

journal reference (only the abstract is free): Geology>>