NASA's Global Land-Ocean Temperature Index graph provides a clear view of the steep rise in global temperatures since 1880 and particularly over the past three decades. The graph is a line plot of the index, 1880 to present, with the base period 1951-1980. The dotted black line is the annual mean and the solid red line is the five-year mean. The green bars show uncertainty estimates.
To see the Global Land-Ocean Temperature graph, click here: