A new report by the National Oceanic and Atmospheric Administration shows this year’s Arctic temperatures are the warmest on record. The report found some areas of the Arctic experienced temperatures more than 5 degrees warmer than average. It also found “extensive” melting across more than 50 percent of Greenland’s ice sheet. Speaking at a news conference on Tuesday, NOAA chief scientist Richard Spinrad warned: “The Arctic is warming twice as fast as other parts of the planet.”