1850 NaN 1851 NaN 1852 NaN 1853 NaN 1854 NaN 1855 NaN 1856 NaN 1857 NaN 1858 NaN 1859 NaN 1860 NaN 1861 NaN 1862 NaN 1863 NaN 1864 NaN 1865 NaN 1866 NaN 1867 NaN 1868 NaN 1869 NaN 1870 NaN 1871 NaN 1872 NaN 1873 NaN 1874 NaN 1875 NaN 1876 NaN 1877 NaN 1878 NaN 1879 NaN 1880 -0.1747 1881 -0.2047 1882 -0.0647 1883 -0.1247 1884 -0.4847 1885 -0.2947 1886 -0.3347 1887 -0.5247 1888 -0.3147 1889 -0.0047 1890 -0.2847 1891 -0.6047 1892 -0.4447 1893 -0.4447 1894 -0.3847 1895 -0.3847 1896 -0.3247 1897 -0.2247 1898 -0.2547 1899 -0.3147 1900 -0.1247 1901 -0.1147 1902 -0.3647 1903 -0.4447 1904 -0.4947 1905 -0.3347 1906 -0.2347 1907 -0.4847 1908 -0.3947 1909 -0.3947 1910 -0.2847 1911 -0.3347 1912 -0.4147 1913 -0.3747 1914 -0.1147 1915 -0.0447 1916 -0.2947 1917 -0.5547 1918 -0.4247 1919 -0.1747 1920 -0.2647 1921 -0.1347 1922 -0.1847 1923 -0.2547 1924 -0.2147 1925 -0.2447 1926 -0.0547 1927 -0.1447 1928 -0.1047 1929 -0.3147 1930 -0.1247 1931 -0.0647 1932 -0.0647 1933 -0.2147 1934 -0.0747 1935 -0.1747 1936 -0.0847 1937 0.0153 1938 0.0553 1939 -0.1147 1940 0.0453 1941 0.0153 1942 0.0053 1943 -0.0347 1944 0.0153 1945 -0.1047 1946 -0.0947 1947 0.0153 1948 -0.1247 1949 -0.1847 1950 -0.2647 1951 -0.1147 1952 -0.0647 1953 0.0153 1954 -0.1847 1955 -0.1747 1956 -0.2747 1957 -0.0247 1958 -0.0047 1959 -0.0447 1960 -0.1147 1961 0.0053 1962 -0.0447 1963 -0.0647 1964 -0.3447 1965 -0.2447 1966 -0.1747 1967 -0.1147 1968 -0.1847 1969 -0.0847 1970 -0.0547 1971 -0.1947 1972 -0.1447 1973 0.0853 1974 -0.1547 1975 -0.1147 1976 -0.3047 1977 0.0653 1978 -0.0247 1979 0.0453 1980 0.1853 1981 0.3053 1982 -0.0147 1983 0.2453 1984 0.0553 1985 0.0253 1986 0.0953 1987 0.2553 1988 0.3253 1989 0.1853 1990 0.3853 1991 0.3453 1992 0.0553 1993 0.0953 1994 0.2253 1995 0.3553 1996 0.2653 1997 0.3053 1998 0.6053 1999 0.3353 2000 0.3053 2001 0.4553 2002 0.5753 2003 0.5653 2004 0.4953 2005 0.6753 2006 0.5453 2007 0.6253 2008 0.4453 2009 0.6153 Land surface air temperature anomalies relative to 1961-1990: NASA GISS (Hansen et al. 2001, green) Hansen, J., R. Ruedy, M. Sato, M. Imhoff, W. Lawrence, D. Easterling, T. Peterson, and T. Karl, 2001: A closer look at United States and global surface temperature change. J. Geophys. Res. 106, 23947-23963. Data publically available from: http://data.giss.nasa.gov/gistemp/tabledata/GLB.Ts.txt