EVERYDAY SCIENCE

Detailed explanation-1: -The rate of warming since 1981 is more than twice as fast: 0.32° F (0.18° C) per decade.

Detailed explanation-2: -On average, the study finds that the planet as a whole warmed by 0.19C per decade, while the Arctic warmed 3.8 times faster – at 0.73C per decade.

Detailed explanation-3: -The Arctic tundra is the coldest of all biomes, with an average annual temperature in the Arctic Circle being-12 to-6° C (0 to 20° F).

Detailed explanation-4: -The Arctic is warming three times as fast and the global average. This is mainly because melting of snow and ice exposes a darker surface and increases the amount of solar energy absorbed in these areas (albedo effect).