Study: Greenland ice sheet has highest temperatures in 1,000 years

The researchers reconstructed temperature trends from 1000 AD to 2011 by studying ice sheets and ice cores in central and northern Greenland.

Data shows that the Greenland island, which is part of Denmark, experienced a cooling trend until about 1800 and has seen a steep warming trend since.

The Industrial Revolution, which amplified global mass use of fossil fuels, began at roughly the same time. From 2001 to 2011, ice sheet temperatures were 1.5 degrees Celsius warmer than the 20th century average.