"-------------------------------------------------------------------------------------------" " Atmospheric CO2 record based on ice core data before 1959 and yearly averages " " of direct observations from Mauna Loa and the South Pole after and " " including 1959 (from Scripps CO2 Program). " " " " Ice core data from (Ethridge et. al., 1996; MacFarling Meure et al., 2006) and " " yearly averages of direct observations from Mauna Loa and the South Pole after and " " including 1959 (from Scripps CO2 Program). " " " " Annual mean CO2 concentration for Mauna Loa and South Pole starting in 1959. " " These values are derived from seasonally detrended monthly mean values for each station " " that have been filled with values from the spline fit when monthly averages are " " not available. Average values are centered on 1-July of each year. " " " " Mauna Loa and South Pole CO2 concentrations are measured on the '12' calibration scale " " " " For Mauna Loa Observatory, Hawaii: Latitude 19.5ÿN Longitude 155.6ÿW Elevation 3397m " " For South Pole: Latitude 90.0ÿS Elevation 2810m " " " " Scripps CO2 Source: R. F. Keeling, S. C. Piper, A. F. Bollenbacher and S. J. Walker " " Scripps CO2 Program ( http://scrippsco2.ucsd.edu ) " " Scripps Institution of Oceanography (SIO) " " University of California " " La Jolla, California USA 92093-0244 " " " " Status of Scripps CO2 data and correspondence: " " " " These data are subject to revision based on recalibration of standard gases. Questions " " about the data should be directed to Dr. Ralph Keeling (rkeeling@ucsd.edu) and " " and Dr. Stephen Piper (scpiper@popmail.ucsd.edu), Scripps CO2 Program. " " " " " "-------------------------------------------------------------------------------------------" " " " Sample Date, CO2 " " (year CE), (ppm) " 13.30, 276.75 29.52, 277.88 55.96, 277.38 104.48, 277.51 135.98, 278.13 168.21, 280.05 202.48, 280.72 227.90, 281.49 274.16, 280.13 302.35, 279.83 329.24, 278.92 364.64, 277.05 428.38, 276.91 461.24, 276.72 499.80, 276.36 536.67, 276.00 572.00, 277.56 595.64, 276.90 631.98, 278.25 667.94, 279.39 698.42, 279.70 729.67, 278.53 764.50, 278.53 799.24, 278.55 857.31, 279.34 897.44, 278.91 944.24, 279.12 968.20, 278.46 1005.00, 280.50 1025.17, 280.83 1058.01, 282.76 1105.37, 282.75 1159.61, 283.88 1207.42, 283.60 1257.56, 282.11 1275.75, 281.13 1306.45, 281.50 1349.66, 280.06 1411.25, 279.62 1429.33, 279.54 1431.00, 282.52 1560.43, 281.75 1588.30, 281.03 1610.41, 271.83 1628.93, 274.50 1640.08, 276.62 1689.59, 276.25 1722.79, 276.94 1734.09, 278.23 1742.73, 276.74 1752.02, 276.39 1763.50, 276.32 1773.74, 277.78 1780.59, 276.78 1794.41, 281.54 1799.56, 281.15 1814.23, 284.34 1826.16, 281.28 1834.51, 283.73 1838.01, 284.07 1844.00, 286.50 1846.00, 283.30 1846.00, 284.96 1849.00, 287.73 1852.29, 288.57 1854.00, 287.03 1859.00, 286.48 1864.00, 285.41 1867.00, 285.22 1869.09, 287.69 1873.00, 287.17 1874.00, 290.52 1884.00, 289.81 1884.35, 289.01 1886.00, 290.62 1889.00, 291.52 1889.00, 292.23 1894.00, 293.84 1896.00, 298.16 1899.00, 296.00 1899.00, 296.21 1902.00, 295.68 1902.00, 294.96 1904.00, 295.12 1909.00, 300.45 1911.50, 298.39 1914.00, 300.02 1914.00, 300.69 1918.63, 303.27 1919.00, 303.55 1923.00, 303.20 1923.58, 305.20 1928.75, 307.77 1929.00, 305.72 1933.00, 307.21 1934.50, 307.82 1936.50, 308.99 1938.00, 309.56 1939.00, 310.94 1940.00, 311.90 1941.00, 310.70 1941.50, 310.30 1942.00, 310.95 1942.00, 311.63 1943.00, 310.51 1943.00, 311.03 1944.00, 311.36 1944.00, 312.14 1944.00, 311.29 1945.00, 309.75 1946.00, 311.46 1947.00, 310.80 1947.00, 309.98 1947.00, 311.46 1948.00, 310.47 1949.00, 311.15 1950.00, 312.55 1953.00, 312.06 1954.00, 311.68 1955.00, 313.49 1955.00, 313.80 1957.00, 314.04 1959.50, 315.81 1960.50, 316.68 1961.50, 317.37 1962.50, 318.00 1963.50, 318.65 1964.50, 319.15 1965.50, 319.72 1966.50, 321.05 1967.50, 321.75 1968.50, 322.52 1969.50, 323.86 1970.50, 325.01 1971.50, 325.71 1972.50, 326.73 1973.50, 328.65 1974.50, 329.36 1975.50, 330.34 1976.50, 331.39 1977.50, 332.98 1978.50, 334.61 1979.50, 335.94 1980.50, 337.85 1981.50, 339.10 1982.50, 340.28 1983.50, 341.98 1984.50, 343.48 1985.50, 344.77 1986.50, 346.16 1987.50, 347.85 1988.50, 350.05 1989.50, 351.56 1990.50, 352.84 1991.50, 354.24 1992.50, 355.19 1993.50, 355.97 1994.50, 357.58 1995.50, 359.52 1996.50, 361.25 1997.50, 362.43 1998.50, 365.14 1999.50, 366.96 2000.50, 368.25 2001.50, 369.65 2002.50, 371.87 2003.50, 374.22 2004.50, 376.01 2005.50, 378.16 2006.50, 380.20 2007.50, 382.07 2008.50, 384.00 2009.50, 385.74 2010.50, 388.00 2011.50, 389.84 2012.50, 392.03 2013.50, 394.85 2014.50, 396.96 2015.50, 399.26 2016.50, 402.43 2017.50, 404.54 2018.50, 406.89 2019.50, 409.53 2020.50, 411.99