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Climate and Atmosphere — Global Gas Concentrations: CO2 Units: Parts per million

Reverse years

		2008	2007	2006	2005	2004	2003	2002	2001	2000	1999	1998	1997	1996	1995	1994	1993	1992	1991	1990	1989	1988	1987	1986	1985	1984	1983	1982	1981	1980	1979	1978	1977	1976	1975	1974	1973	1972	1971	1970	1969	1968	1967	1966	1965	1963	1962	1961	1960	1959	1953	1943	1935	1927	1921	1915	1909	1905	1903	1899	1887	1878	1874	1869	1854	1847	1843	1839	1816	1791	1764	1744
World
World {1}		385.34	383.55	381.84	379.67	377.38	375.64	373.10	371.02	369.48	368.31	366.63	363.76	362.64	360.88	358.89	357.04	356.37	355.59	354.19	352.91	351.48	348.93	347.15	345.90	344.42	342.78	341.13	339.93	338.69	336.85	335.51	333.90	332.15	331.15	330.25	329.68	327.45	326.32	325.68	324.63	323.05	322.16	321.38	320.04	318.99	318.45	317.64	316.91	315.98	312.70	307.90	306.60	305.50	301.60	300.50	299.20	296.90	294.80	295.80	292.30	290.30	289.50	289.30	288.20	286.80	287.40	283.10	283.80	279.70	276.70	276.80

Footnotes

1 - World

Data after 1958 are from Mauna Loa Observatory Data before 1958 are from the Siple Ice Core.

Source

Data before 1958: Neftel, Friedli, Moore et al. 1994. Historical Carbon Dioxide Record from the Siple Station Ice Core (reported on-line by the Carbon Dioxide Information Analysis Center at http://cdiac.esd.ornl.gov/ftp/trends/co2/siple2.013). Bern, Switzerland: University of Bern. Data after 1958: Keeling, C.D., Whorf, T.P., and the Scripps Institute of Oceanography. 2005. Atmospheric CO2 Concentrations (ppmv) derived from in-situ air samples collected at Mauna Loa Observatory, Hawaii (reported on-line by the Carbon Dioxide Information Analysis Center at http://cdiac.ornl.gov/ftp/trends/co2/maunaloa.co2. Mauna Loa: Scripps Institute of Oceanography.