Year AD Atm. CO2 (ppmv) 1800.00 280. 1801.00 280.172 1802.00 280.343 1803.00 280.515 1804.00 280.686 1805.00 280.858 1806.00 281.03 1807.00 281.201 1808.00 281.373 1809.00 281.544 1810.00 281.716 1811.00 281.888 1812.00 282.059 1813.00 282.231 1814.00 282.402 1815.00 282.574 1816.00 282.746 1817.00 282.917 1818.00 283.089 1819.00 283.26 1820.00 283.432 1821.00 283.604 1822.00 283.775 1823.00 283.947 1824.00 284.118 1825.00 284.29 1826.00 284.462 1827.00 284.633 1828.00 284.805 1829.00 284.977 1830.00 285.148 1831.00 285.32 1832.00 285.491 1833.00 285.663 1834.00 285.835 1835.00 286.006 1836.00 286.178 1837.00 286.349 1838.00 286.521 1839.00 286.693 1840.00 286.864 1841.00 287.036 1842.00 287.207 1843.00 287.379 1844.00 287.551 1845.00 287.722 1846.00 287.894 1847.00 288.065 1848.00 288.237 1849.00 288.409 1850.00 288.58 1851.00 288.752 1852.00 288.923 1853.00 289.095 1854.00 289.267 1855.00 289.438 1856.00 289.61 1857.00 289.781 1858.00 289.953 1859.00 290.120 1860.00 290.288 1861.00 290.458 1862.00 290.629 1863.00 290.802 1864.00 290.976 1865.00 291.151 1866.00 291.328 1867.00 291.507 1868.00 291.687 1869.00 291.869 1870.00 292.052 1871.00 292.237 1872.00 292.423 1873.00 292.611 1874.00 292.800 1875.00 292.991 1876.00 293.183 1877.00 293.377 1878.00 293.572 1879.00 293.769 1880.00 293.967 1881.00 294.167 1882.00 294.369 1883.00 294.572 1884.00 294.776 1885.00 294.983 1886.00 295.190 1887.00 295.400 1888.00 295.610 1889.00 295.823 1890.00 296.037 1891.00 296.252 1892.00 296.470 1893.00 296.688 1894.00 296.909 1895.00 297.130 1896.00 297.354 1897.00 297.579 1898.00 297.806 1899.00 298.034 1900.00 298.264 1901.00 298.496 1902.00 298.729 1903.00 298.964 1904.00 299.200 1905.00 299.438 1906.00 299.677 1907.00 299.919 1908.00 300.162 1909.00 300.406 1910.00 300.652 1911.00 300.900 1912.00 301.150 1913.00 301.401 1914.00 301.653 1915.00 301.908 1916.00 302.164 1917.00 302.422 1918.00 302.681 1919.00 302.942 1920.00 303.205 1921.00 303.469 1922.00 303.735 1923.00 304.003 1924.00 304.272 1925.00 304.543 1926.00 304.816 1927.00 305.091 1928.00 305.367 1929.00 305.645 1930.00 305.925 1931.00 306.206 1932.00 306.488 1933.00 306.773 1934.00 307.060 1935.00 307.348 1936.00 307.638 1937.00 307.929 1938.00 308.222 1939.00 308.517 1940.00 308.814 1941.00 309.112 1942.00 309.413 1943.00 309.714 1944.00 310.018 1945.00 310.323 1946.00 310.630 1947.00 310.939 1948.00 311.250 1949.00 311.562 1950.00 311.877 1951.00 312.193 1952.00 312.510 1953.00 312.829 1954.00 313.151 1955.00 313.474 1956.00 313.798 1957.00 314.600 1958.00 315.460 1959.00 315.830 1960.00 316.91 1961.00 317.63 1962.00 318.47 1963.00 319.02 1964.00 319.52 1965.00 320.09 1966.00 321.34 1967.00 322.12 1968.00 323.11 1969.00 324.6 1970.00 325.65 1971.00 326.32 1972.00 327.51 1973.00 329.61 1974.00 330.29 1975.00 331.16 1976.00 332.18 1977.00 333.88 1978.00 335.52 1979.00 336.89 1980.00 338.67 1981.00 339.95 1982.00 341.09 1983.00 342.75 1984.00 344.44 1985.00 345.87 1986.00 347.14 1987.00 348.99 1988.00 351.44 1989.00 352.94 1990.00 354.19 1991.00 355.62 1992.00 356.36