6 335 4 Source: L.D.D. Harvey University of Toronto Toronto, Ontario, Canada Model T: IPCC 1992 scenarios - CO2 concentration (ppm) YEAR IS92A IS92C IS92F 1766.0 277.98 277.98 277.98 1767.0 278.01 278.01 278.01 1768.0 278.04 278.04 278.04 1769.0 278.08 278.08 278.08 1770.0 278.12 278.12 278.12 1771.0 278.16 278.16 278.16 1772.0 278.21 278.21 278.21 1773.0 278.26 278.26 278.26 1774.0 278.31 278.31 278.31 1775.0 278.36 278.36 278.36 1776.0 278.42 278.42 278.42 1777.0 278.48 278.48 278.48 1778.0 278.55 278.55 278.55 1779.0 278.61 278.61 278.61 1780.0 278.68 278.68 278.68 1781.0 278.76 278.76 278.76 1782.0 278.83 278.83 278.83 1783.0 278.91 278.91 278.91 1784.0 279.00 279.00 279.00 1785.0 279.08 279.08 279.08 1786.0 279.17 279.17 279.17 1787.0 279.26 279.26 279.26 1788.0 279.36 279.36 279.36 1789.0 279.46 279.46 279.46 1790.0 279.56 279.56 279.56 1791.0 279.67 279.67 279.67 1792.0 279.78 279.78 279.78 1793.0 279.89 279.89 279.89 1794.0 280.01 280.01 280.01 1795.0 280.13 280.13 280.13 1796.0 280.25 280.25 280.25 1797.0 280.38 280.38 280.38 1798.0 280.51 280.51 280.51 1799.0 280.64 280.64 280.64 1800.0 280.78 280.78 280.78 1801.0 280.91 280.91 280.91 1802.0 281.05 281.05 281.05 1803.0 281.19 281.19 281.19 1804.0 281.34 281.34 281.34 1805.0 281.48 281.48 281.48 1806.0 281.62 281.62 281.62 1807.0 281.76 281.76 281.76 1808.0 281.91 281.91 281.91 1809.0 282.05 282.05 282.05 1810.0 282.19 282.19 282.19 1811.0 282.32 282.32 282.32 1812.0 282.46 282.46 282.46 1813.0 282.59 282.59 282.59 1814.0 282.72 282.72 282.72 1815.0 282.84 282.84 282.84 1816.0 282.96 282.96 282.96 1817.0 283.08 283.08 283.08 1818.0 283.19 283.19 283.19 1819.0 283.30 283.30 283.30 1820.0 283.40 283.40 283.40 1821.0 283.50 283.50 283.50 1822.0 283.60 283.60 283.60 1823.0 283.70 283.70 283.70 1824.0 283.79 283.79 283.79 1825.0 283.88 283.88 283.88 1826.0 283.97 283.97 283.97 1827.0 284.07 284.07 284.07 1828.0 284.16 284.16 284.16 1829.0 284.25 284.25 284.25 1830.0 284.34 284.34 284.34 1831.0 284.44 284.44 284.44 1832.0 284.53 284.53 284.53 1833.0 284.63 284.63 284.63 1834.0 284.74 284.74 284.74 1835.0 284.84 284.84 284.84 1836.0 284.96 284.96 284.96 1837.0 285.07 285.07 285.07 1838.0 285.19 285.19 285.19 1839.0 285.32 285.32 285.32 1840.0 285.45 285.45 285.45 1841.0 285.59 285.59 285.59 1842.0 285.74 285.74 285.74 1843.0 285.88 285.88 285.88 1844.0 286.03 286.03 286.03 1845.0 286.17 286.17 286.17 1846.0 286.31 286.31 286.31 1847.0 286.45 286.45 286.45 1848.0 286.58 286.58 286.58 1849.0 286.72 286.72 286.72 1850.0 286.85 286.85 286.85 1851.0 286.97 286.97 286.97 1852.0 287.09 287.09 287.09 1853.0 287.21 287.21 287.21 1854.0 287.33 287.33 287.33 1855.0 287.44 287.44 287.44 1856.0 287.55 287.55 287.55 1857.0 287.66 287.66 287.66 1858.0 287.76 287.76 287.76 1859.0 287.87 287.87 287.87 1860.0 287.97 287.97 287.97 1861.0 288.08 288.08 288.08 1862.0 288.18 288.18 288.18 1863.0 288.29 288.29 288.29 1864.0 288.41 288.41 288.41 1865.0 288.52 288.52 288.52 1866.0 288.65 288.65 288.65 1867.0 288.77 288.77 288.77 1868.0 288.91 288.91 288.91 1869.0 289.04 289.04 289.04 1870.0 289.19 289.19 289.19 1871.0 289.34 289.34 289.34 1872.0 289.50 289.50 289.50 1873.0 289.66 289.66 289.66 1874.0 289.83 289.83 289.83 1875.0 290.01 290.01 290.01 1876.0 290.20 290.20 290.20 1877.0 290.39 290.39 290.39 1878.0 290.59 290.59 290.59 1879.0 290.80 290.80 290.80 1880.0 291.02 291.02 291.02 1881.0 291.24 291.24 291.24 1882.0 291.47 291.47 291.47 1883.0 291.70 291.70 291.70 1884.0 291.94 291.94 291.94 1885.0 292.19 292.19 292.19 1886.0 292.44 292.44 292.44 1887.0 292.69 292.69 292.69 1888.0 292.94 292.94 292.94 1889.0 293.20 293.20 293.20 1890.0 293.46 293.46 293.46 1891.0 293.71 293.71 293.71 1892.0 293.97 293.97 293.97 1893.0 294.22 294.22 294.22 1894.0 294.48 294.48 294.48 1895.0 294.72 294.72 294.72 1896.0 294.96 294.96 294.96 1897.0 295.20 295.20 295.20 1898.0 295.44 295.44 295.44 1899.0 295.68 295.68 295.68 1900.0 295.92 295.92 295.92 1901.0 296.16 296.16 296.16 1902.0 296.41 296.41 296.41 1903.0 296.66 296.66 296.66 1904.0 296.93 296.93 296.93 1905.0 297.20 297.20 297.20 1906.0 297.48 297.48 297.48 1907.0 297.76 297.76 297.76 1908.0 298.06 298.06 298.06 1909.0 298.35 298.35 298.35 1910.0 298.65 298.65 298.65 1911.0 298.96 298.96 298.96 1912.0 299.26 299.26 299.26 1913.0 299.57 299.57 299.57 1914.0 299.88 299.88 299.88 1915.0 300.20 300.20 300.20 1916.0 300.51 300.51 300.51 1917.0 300.82 300.82 300.82 1918.0 301.14 301.14 301.14 1919.0 301.45 301.45 301.45 1920.0 301.77 301.77 301.77 1921.0 302.08 302.08 302.08 1922.0 302.39 302.39 302.39 1923.0 302.71 302.71 302.71 1924.0 303.02 303.02 303.02 1925.0 303.33 303.33 303.33 1926.0 303.63 303.63 303.63 1927.0 303.93 303.93 303.93 1928.0 304.22 304.22 304.22 1929.0 304.51 304.51 304.51 1930.0 304.79 304.79 304.79 1931.0 305.07 305.07 305.07 1932.0 305.34 305.34 305.34 1933.0 305.61 305.61 305.61 1934.0 305.88 305.88 305.88 1935.0 306.15 306.15 306.15 1936.0 306.41 306.41 306.41 1937.0 306.68 306.68 306.68 1938.0 306.95 306.95 306.95 1939.0 307.23 307.23 307.23 1940.0 307.51 307.51 307.51 1941.0 307.79 307.79 307.79 1942.0 308.09 308.09 308.09 1943.0 308.40 308.40 308.40 1944.0 308.72 308.72 308.72 1945.0 309.05 309.05 309.05 1946.0 309.40 309.40 309.40 1947.0 309.77 309.77 309.77 1948.0 310.15 310.15 310.15 1949.0 310.54 310.54 310.54 1950.0 310.96 310.96 310.96 1951.0 311.39 311.39 311.39 1952.0 311.84 311.84 311.84 1953.0 312.31 312.31 312.31 1954.0 312.81 312.81 312.81 1955.0 313.33 313.33 313.33 1956.0 313.87 313.87 313.87 1957.0 314.44 314.44 314.44 1958.0 315.03 315.03 315.03 1959.0 315.66 315.66 315.66 1960.0 316.31 316.31 316.31 1961.0 316.98 316.98 316.98 1962.0 317.67 317.67 317.67 1963.0 318.38 318.38 318.38 1964.0 319.11 319.11 319.11 1965.0 319.87 319.87 319.87 1966.0 320.69 320.69 320.69 1967.0 321.57 321.57 321.57 1968.0 322.52 322.52 322.52 1969.0 323.52 323.52 323.52 1970.0 324.59 324.59 324.59 1971.0 325.72 325.72 325.72 1972.0 326.88 326.88 326.88 1973.0 328.09 328.09 328.09 1974.0 329.31 329.31 329.31 1975.0 330.55 330.55 330.55 1976.0 331.83 331.83 331.83 1977.0 333.16 333.16 333.16 1978.0 334.54 334.54 334.54 1979.0 335.96 335.96 335.96 1980.0 337.42 337.42 337.42 1981.0 338.88 338.88 338.88 1982.0 340.37 340.37 340.37 1983.0 341.88 341.88 341.88 1984.0 343.42 343.42 343.42 1985.0 344.99 344.99 344.99 1986.0 346.60 346.60 346.60 1987.0 348.25 348.25 348.25 1988.0 349.93 349.93 349.93 1989.0 351.62 351.62 351.62 1990.0 353.32 353.32 353.32 1991.0 355.02 355.02 355.02 1992.0 356.54 356.42 356.56 1993.0 358.09 357.78 358.13 1994.0 359.66 359.11 359.74 1995.0 361.24 360.41 361.36 1996.0 362.85 361.73 363.04 1997.0 364.48 363.06 364.75 1998.0 366.13 364.41 366.51 1999.0 367.79 365.78 368.31 2000.0 369.48 367.16 370.16 2001.0 371.21 368.55 372.05 2002.0 372.99 369.95 373.98 2003.0 374.82 371.37 375.97 2004.0 376.68 372.80 378.00 2005.0 378.59 374.24 380.07 2006.0 380.53 375.70 382.21 2007.0 382.51 377.17 384.41 2008.0 384.51 378.65 386.67 2009.0 386.55 380.14 388.99 2010.0 388.62 381.65 391.36 2011.0 390.72 383.16 393.80 2012.0 392.85 384.67 396.29 2013.0 395.02 386.19 398.83 2014.0 397.22 387.72 401.44 2015.0 399.45 389.25 404.10 2016.0 401.72 390.78 406.82 2017.0 404.03 392.32 409.61 2018.0 406.38 393.87 412.46 2019.0 408.78 395.42 415.37 2020.0 411.21 396.98 418.35 2021.0 413.69 398.56 421.40 2022.0 416.20 400.15 424.52 2023.0 418.76 401.76 427.71 2024.0 421.35 403.38 430.97 2025.0 423.99 405.02 434.30 2026.0 426.63 406.62 437.64 2027.0 429.29 408.19 440.98 2028.0 431.96 409.73 444.33 2029.0 434.64 411.24 447.69 2030.0 437.34 412.73 451.07 2031.0 440.05 414.18 454.47 2032.0 442.79 415.62 457.88 2033.0 445.53 417.02 461.30 2034.0 448.30 418.42 464.74 2035.0 451.09 419.78 468.20 2036.0 453.90 421.13 471.67 2037.0 456.72 422.45 475.16 2038.0 459.56 423.76 478.66 2039.0 462.41 425.05 482.19 2040.0 465.28 426.32 485.73 2041.0 468.17 427.57 489.29 2042.0 471.08 428.81 492.87 2043.0 474.00 430.02 496.47 2044.0 476.94 431.23 500.09 2045.0 479.89 432.42 503.72 2046.0 482.87 433.58 507.38 2047.0 485.86 434.74 511.06 2048.0 488.87 435.88 514.76 2049.0 491.89 437.01 518.48 2050.0 494.94 438.12 522.22 2051.0 497.99 439.20 526.01 2052.0 501.06 440.26 529.84 2053.0 504.13 441.30 533.71 2054.0 507.21 442.31 537.62 2055.0 510.30 443.30 541.57 2056.0 513.41 444.27 545.56 2057.0 516.52 445.21 549.59 2058.0 519.65 446.13 553.66 2059.0 522.79 447.03 557.77 2060.0 525.94 447.91 561.92 2061.0 529.10 448.77 566.10 2062.0 532.27 449.60 570.33 2063.0 535.46 450.42 574.59 2064.0 538.66 451.22 578.90 2065.0 541.86 451.99 583.24 2066.0 545.09 452.75 587.61 2067.0 548.32 453.48 592.03 2068.0 551.57 454.20 596.48 2069.0 554.83 454.89 600.97 2070.0 558.10 455.57 605.50 2071.0 561.39 456.22 610.07 2072.0 564.69 456.86 614.67 2073.0 568.00 457.48 619.31 2074.0 571.32 458.08 623.99 2075.0 574.66 458.66 628.71 2076.0 578.05 459.23 633.49 2077.0 581.49 459.79 638.32 2078.0 584.98 460.35 643.22 2079.0 588.52 460.91 648.18 2080.0 592.10 461.45 653.20 2081.0 595.74 461.98 658.27 2082.0 599.41 462.51 663.41 2083.0 603.14 463.03 668.60 2084.0 606.90 463.55 673.84 2085.0 610.71 464.05 679.14 2086.0 614.56 464.54 684.50 2087.0 618.46 465.02 689.91 2088.0 622.40 465.50 695.38 2089.0 626.38 465.97 700.91 2090.0 630.40 466.42 706.48 2091.0 634.46 466.87 712.12 2092.0 638.56 467.30 717.81 2093.0 642.71 467.73 723.55 2094.0 646.89 468.16 729.34 2095.0 651.12 468.56 735.19 2096.0 655.38 468.96 741.09 2097.0 659.68 469.35 747.05 2098.0 664.03 469.73 753.06 2099.0 668.41 470.11 759.12 2100.0 672.83 470.47 765.23