Dau venia NASA Grade 1660 Annual mean temperature anomaly 5 year average mean temperature anomaly UkenClub Games 1990 Change in global surface temperature relative to 1910 2000 average temperatures 1900 1910 1920 3 Refer to Figure 10 2 1930 1940 1930 3500 a What does the 0 in the y axis symbolize 1979 b How are temperature anomalies measured 1600 1990 2000 2010 Anomaly in 12 66 0 4 107 104 Figure 10 2 Change in Global Surface Temperatures Relative to the 1910 2000 Average Tip go to the UNEP GRID 160 website for an interactive version of this graph 06 2020