A report by the US climate agency NOAA indicated on Tuesday that the Arctic experienced its warmest summer this year since measurements began. The land temperatures in the summer were the highest ever measured in the region around the North Pole, NOAA scientists said in the report known as the Artic Report Card. They felt this was a sign of “accelerating climate change”. The highest point of the ice sheet in Greenland has melted for the fifth time in the past 34 years in which data has been collected, and the expansion of the sea ice has continued to decline. Overall, it was the sixth warmest …