IPCC (2021) AR6_WGI AnnexIII (1750-1958) + NOAA GML Annual Mean at Mauna Loa (1959-1978) + NOAA GML Annual Global Mean (1976-2023) -------------------------------------------- Year CO2(ppm) -------------------- 1750 278.3 1850 285.5 1851 285.6 1852 285.8 1853 285.9 1854 286.0 1855 286.1 1856 286.2 1857 286.3 1858 286.5 1859 286.6 1860 286.8 1861 287.0 1862 287.2 1863 287.3 1864 287.5 1865 287.7 1866 287.8 1867 288.0 1868 288.1 1869 288.2 1870 288.4 1871 288.5 1872 288.6 1873 288.8 1874 289.0 1875 289.2 1876 289.5 1877 289.7 1878 289.9 1879 290.1 1880 290.4 1881 290.6 1882 290.9 1883 291.1 1884 291.4 1885 291.7 1886 292.0 1887 292.3 1888 292.6 1889 292.9 1890 293.3 1891 293.6 1892 294.0 1893 294.3 1894 294.6 1895 294.9 1896 295.1 1897 295.4 1898 295.7 1899 296.0 1900 296.4 1901 296.7 1902 297.0 1903 297.4 1904 297.6 1905 298.0 1906 298.3 1907 298.8 1908 299.2 1909 299.6 1910 300.0 1911 300.5 1912 301.0 1913 301.5 1914 302.0 1915 302.5 1916 303.1 1917 303.6 1918 304.0 1919 304.4 1920 304.8 1921 305.1 1922 305.5 1923 305.8 1924 306.1 1925 306.3 1926 306.4 1927 306.7 1928 306.8 1929 307.0 1930 307.1 1931 307.3 1932 307.5 1933 307.8 1934 308.2 1935 308.6 1936 309.4 1937 310.2 1938 310.7 1939 311.2 1940 311.7 1941 312.2 1942 312.5 1943 312.7 1944 312.7 1945 312.7 1946 312.7 1947 312.8 1948 312.8 1949 312.9 1950 313.1 1951 313.3 1952 313.6 1953 314.0 1954 314.3 1955 314.6 1956 314.9 1957 315.2 1958 315.5 1959 315.98 1960 316.91 1961 317.64 1962 318.45 1963 318.99 1964 319.62 1965 320.04 1966 321.37 1967 322.18 1968 323.05 1969 324.62 1970 325.68 1971 326.32 1972 327.46 1973 329.68 1974 330.19 1975 331.13 1976 332.03 1977 333.84 1978 335.41 1979 336.85 1980 338.91 1981 340.11 1982 340.86 1983 342.53 1984 344.07 1985 345.54 1986 346.97 1987 348.68 1988 351.16 1989 352.78 1990 354.05 1991 355.39 1992 356.09 1993 356.83 1994 358.33 1995 360.17 1996 361.93 1997 363.05 1998 365.70 1999 367.80 2000 368.96 2001 370.57 2002 372.59 2003 375.15 2004 376.95 2005 378.98 2006 381.15 2007 382.90 2008 385.02 2009 386.50 2010 388.76 2011 390.63 2012 392.65 2013 395.40 2014 397.34 2015 399.65 2016 403.08 2017 405.22 2018 407.61 2019 410.07 2020 412.44 2021 414.70 2022 417.07 2023 419.31