Fig. 1From: Externally forced symmetric warming in the Arctic and Antarctic during the second half of the twentieth centuryTime series of surface temperature change (K) over the Arctic (red) and the Antarctic (blue) in a Berkeley Earth’s primary product and b CESM-LENS. The temperature change is relative to a monthly climatological mean obtained by averaging over 1951–1980. The thick solid and dashed lines represent linear trends from 1955 to 2000 and from 2000 to 2020, respectivelyBack to article page