Long description

This is a graph of the average near surface temperature from all land stations from 60° N to 90° N. The horizontal axis is year from 1880 to 2010 and there are ticks every 10 years. The vertical axis is temperature change relative to the 1961–1990 mean in degrees Celsius: the minimum is −2 °C, the maximum is 2.5 °C and there are ticks every 0.5 °C. The zero on the vertical axis is the average temperature for 1961–1990 for all regions from 60° N to 90° N. There are blue dots representing the average temperature for each year. From 1900 to 1920 the points are all below 0 °C, from 1920 to 1960 almost all points are above zero, from 1960 to 1980 almost all points are below zero, and finally, from about 1980 to 2010 the points are mostly above zero and follow an upward trend.