Arctic Sea Ice 8000 Years Ago less Than Half Of Today’s, Yet Polar Bears Thrived!

At Twitter NoTricksZone’s contributor Kenneth Richard posted this paper appearing in the Journal Science in 2011.

The papers find that “summer temperatures during the HTM in North Greenland were 2° to 4°C warmer in this part of the Arctic.

Atmospheric CO2 concentrations back then of course were much lower than the historically very modest 410 ppm we have today.