ATMOSPHERIC STATION CO2 MIXING CODE YEAR MONTH RATIO (PPM) MLO 1969 8 322.95 MLO 1969 9 321.37 MLO 1969 10 320.71 MLO 1969 11 322.01 MLO 1969 12 323.77 MLO 1970 1 325.13 MLO 1970 2 325.54 MLO 1970 3 325.67 MLO 1970 4 326.59 MLO 1970 5 327.68 MLO 1970 6 327.28 MLO 1970 7 326.12 MLO 1970 8 324.91 MLO 1970 9 322.96 MLO 1970 10 322.54 MLO 1970 11 323.83 MLO 1970 12 325.27 MLO 1971 1 -999.99 MLO 1971 2 -999.99 MLO 1971 3 -999.99 MLO 1971 4 -999.99 MLO 1971 5 -999.99 MLO 1971 6 -999.99 MLO 1971 7 -999.99 MLO 1971 8 -999.99 MLO 1971 9 -999.99 MLO 1971 10 -999.99 MLO 1971 11 -999.99 MLO 1971 12 -999.99 MLO 1972 1 -999.99 MLO 1972 2 -999.99 MLO 1972 3 -999.99 MLO 1972 4 -999.99 MLO 1972 5 -999.99 MLO 1972 6 -999.99 MLO 1972 7 -999.99 MLO 1972 8 -999.99 MLO 1972 9 -999.99 MLO 1972 10 -999.99 MLO 1972 11 -999.99 MLO 1972 12 -999.99 MLO 1973 1 -999.99 MLO 1973 2 -999.99 MLO 1973 3 -999.99 MLO 1973 4 -999.99 MLO 1973 5 -999.99 MLO 1973 6 -999.99 MLO 1973 7 -999.99 MLO 1973 8 -999.99 MLO 1973 9 -999.99 MLO 1973 10 -999.99 MLO 1973 11 -999.99 MLO 1973 12 -999.99 MLO 1974 1 -999.99 MLO 1974 2 -999.99 MLO 1974 3 -999.99 MLO 1974 4 -999.99 MLO 1974 5 -999.99 MLO 1974 6 -999.99 MLO 1974 7 -999.99 MLO 1974 8 -999.99 MLO 1974 9 -999.99 MLO 1974 10 -999.99 MLO 1974 11 -999.99 MLO 1974 12 -999.99 MLO 1975 1 -999.99 MLO 1975 2 -999.99 MLO 1975 3 -999.99 MLO 1975 4 -999.99 MLO 1975 5 -999.99 MLO 1975 6 -999.99 MLO 1975 7 -999.99 MLO 1975 8 -999.99 MLO 1975 9 -999.99 MLO 1975 10 -999.99 MLO 1975 11 -999.99 MLO 1975 12 -999.99 MLO 1976 1 -999.99 MLO 1976 2 -999.99 MLO 1976 3 -999.99 MLO 1976 4 -999.99 MLO 1976 5 -999.99 MLO 1976 6 -999.99 MLO 1976 7 332.39 MLO 1976 8 330.96 MLO 1976 9 329.71 MLO 1976 10 329.33 MLO 1976 11 330.58 MLO 1976 12 332.05 MLO 1977 1 332.80 MLO 1977 2 333.14 MLO 1977 3 333.99 MLO 1977 4 335.69 MLO 1977 5 336.49 MLO 1977 6 336.00 MLO 1977 7 334.71 MLO 1977 8 332.32 MLO 1977 9 330.96 MLO 1977 10 331.36 MLO 1977 11 331.98 MLO 1977 12 333.57 MLO 1978 1 335.25 MLO 1978 2 335.81 MLO 1978 3 336.76 MLO 1978 4 337.78 MLO 1978 5 337.98 MLO 1978 6 337.52 MLO 1978 7 335.97 MLO 1978 8 333.94 MLO 1978 9 332.25 MLO 1978 10 332.26 MLO 1978 11 333.19 MLO 1978 12 334.52 MLO 1979 1 336.04 MLO 1979 2 337.01 MLO 1979 3 338.42 MLO 1979 4 338.99 MLO 1979 5 338.90 MLO 1979 6 338.95 MLO 1979 7 337.62 MLO 1979 8 335.42 MLO 1979 9 333.90 MLO 1979 10 334.04 MLO 1979 11 335.09 MLO 1979 12 336.40 MLO 1980 1 338.13 MLO 1980 2 339.74 MLO 1980 3 341.35 MLO 1980 4 342.41 MLO 1980 5 342.21 MLO 1980 6 340.95 MLO 1980 7 338.96 MLO 1980 8 336.97 MLO 1980 9 336.15 MLO 1980 10 336.10 MLO 1980 11 337.11 MLO 1980 12 338.65 MLO 1981 1 340.05 MLO 1981 2 341.41 MLO 1981 3 342.33 MLO 1981 4 343.21 MLO 1981 5 343.38 MLO 1981 6 341.99 MLO 1981 7 340.28 MLO 1981 8 338.57 MLO 1981 9 337.21 MLO 1981 10 337.38 MLO 1981 11 338.86 MLO 1981 12 340.03 MLO 1982 1 340.92 MLO 1982 2 342.01 MLO 1982 3 343.06 MLO 1982 4 343.82 MLO 1982 5 343.79 MLO 1982 6 342.92 MLO 1982 7 341.49 MLO 1982 8 339.03 MLO 1982 9 337.27 MLO 1982 10 337.49 MLO 1982 11 338.97 MLO 1982 12 340.44 MLO 1983 1 341.74 MLO 1983 2 342.18 MLO 1983 3 342.84 MLO 1983 4 344.85 MLO 1983 5 345.85 MLO 1983 6 345.08 MLO 1983 7 343.29 MLO 1983 8 340.95 MLO 1983 9 339.58 MLO 1983 10 339.73 MLO 1983 11 340.85 MLO 1983 12 342.47 MLO 1984 1 343.84 MLO 1984 2 344.42 MLO 1984 3 345.36 MLO 1984 4 346.78 MLO 1984 5 347.25 MLO 1984 6 346.60 MLO 1984 7 344.91 MLO 1984 8 342.67 MLO 1984 9 341.18 MLO 1984 10 341.56 MLO 1984 11 342.74 MLO 1984 12 343.77 MLO 1985 1 344.45 MLO 1985 2 345.37 MLO 1985 3 346.72 MLO 1985 4 347.77 MLO 1985 5 348.44 MLO 1985 6 347.97 MLO 1985 7 346.00 MLO 1985 8 343.93 MLO 1985 9 342.66 MLO 1985 10 342.71 MLO 1985 11 343.77 MLO 1985 12 345.17 MLO 1986 1 345.97 MLO 1986 2 346.40 MLO 1986 3 347.58 MLO 1986 4 349.18 MLO 1986 5 349.80 MLO 1986 6 348.84 MLO 1986 7 346.85 MLO 1986 8 345.07 MLO 1986 9 343.75 MLO 1986 10 343.62 MLO 1986 11 345.24 MLO 1986 12 346.71 MLO 1987 1 347.28 MLO 1987 2 348.00 MLO 1987 3 349.13 MLO 1987 4 350.61 MLO 1987 5 351.58 MLO 1987 6 351.06 MLO 1987 7 349.40 MLO 1987 8 347.30 MLO 1987 9 346.26 MLO 1987 10 346.54 MLO 1987 11 347.94 MLO 1987 12 349.25 MLO 1988 1 350.11 MLO 1988 2 351.31 MLO 1988 3 352.33 MLO 1988 4 353.40 MLO 1988 5 354.10 MLO 1988 6 353.57 MLO 1988 7 352.24 MLO 1988 8 350.06 MLO 1988 9 348.61 MLO 1988 10 348.93 MLO 1988 11 349.90 MLO 1988 12 351.18 MLO 1989 1 352.43 MLO 1989 2 352.88 MLO 1989 3 353.68 MLO 1989 4 355.12 MLO 1989 5 355.83 MLO 1989 6 355.19 MLO 1989 7 353.55 MLO 1989 8 350.93 MLO 1989 9 349.27 MLO 1989 10 349.71 MLO 1989 11 351.34 MLO 1989 12 352.52 MLO 1990 1 353.67 MLO 1990 2 354.79 MLO 1990 3 355.59 MLO 1990 4 356.49 MLO 1990 5 356.93 MLO 1990 6 356.14 MLO 1990 7 354.15 MLO 1990 8 352.08 MLO 1990 9 350.98 MLO 1990 10 351.21 MLO 1990 11 352.73 MLO 1990 12 354.44 MLO 1991 1 355.01 MLO 1991 2 355.78 MLO 1991 3 357.22 MLO 1991 4 358.49 MLO 1991 5 359.14 MLO 1991 6 358.16 MLO 1991 7 355.76 MLO 1991 8 353.71 MLO 1991 9 352.21 MLO 1991 10 352.36 MLO 1991 11 353.70 MLO 1991 12 355.29 MLO 1992 1 356.48 MLO 1992 2 357.03 MLO 1992 3 357.96 MLO 1992 4 359.00 MLO 1992 5 359.69 MLO 1992 6 359.09 MLO 1992 7 356.74 MLO 1992 8 354.85 MLO 1992 9 353.49 MLO 1992 10 353.30 MLO 1992 11 354.35 MLO 1992 12 355.70 MLO 1993 1 356.56 MLO 1993 2 357.13 MLO 1993 3 357.97 MLO 1993 4 359.28 MLO 1993 5 360.23 MLO 1993 6 359.49 MLO 1993 7 357.57 MLO 1993 8 355.12 MLO 1993 9 353.52 MLO 1993 10 353.92 MLO 1993 11 355.19 MLO 1993 12 356.62 ATMOSPHERIC STATION CO2 MIXING CODE YEAR MONTH RATIO (PPM) BRW 1971 5 332.20 BRW 1971 6 330.23 BRW 1971 7 323.67 BRW 1971 8 317.70 BRW 1971 9 318.77 BRW 1971 10 322.86 BRW 1971 11 327.31 BRW 1971 12 331.07 BRW 1972 1 333.39 BRW 1972 2 334.19 BRW 1972 3 334.12 BRW 1972 4 334.51 BRW 1972 5 335.45 BRW 1972 6 333.28 BRW 1972 7 325.66 BRW 1972 8 319.10 BRW 1972 9 322.05 BRW 1972 10 327.26 BRW 1972 11 330.66 BRW 1972 12 333.46 BRW 1973 1 334.71 BRW 1973 2 335.40 BRW 1973 3 336.48 BRW 1973 4 336.98 BRW 1973 5 336.55 BRW 1973 6 334.01 BRW 1973 7 327.53 BRW 1973 8 322.22 BRW 1973 9 323.65 BRW 1973 10 328.60 BRW 1973 11 332.08 BRW 1973 12 334.70 BRW 1974 1 337.01 BRW 1974 2 337.78 BRW 1974 3 337.80 BRW 1974 4 337.59 BRW 1974 5 338.73 BRW 1974 6 338.17 BRW 1974 7 330.53 BRW 1974 8 323.08 BRW 1974 9 323.73 BRW 1974 10 328.95 BRW 1974 11 333.26 BRW 1974 12 335.69 BRW 1975 1 336.62 BRW 1975 2 336.46 BRW 1975 3 336.39 BRW 1975 4 336.60 BRW 1975 5 336.25 BRW 1975 6 334.57 BRW 1975 7 329.69 BRW 1975 8 324.46 BRW 1975 9 324.97 BRW 1975 10 329.56 BRW 1975 11 333.50 BRW 1975 12 336.28 BRW 1976 1 337.48 BRW 1976 2 337.89 BRW 1976 3 338.55 BRW 1976 4 338.85 BRW 1976 5 338.10 BRW 1976 6 335.65 BRW 1976 7 329.98 BRW 1976 8 324.76 BRW 1976 9 325.10 BRW 1976 10 329.61 BRW 1976 11 333.11 BRW 1976 12 336.03 BRW 1977 1 337.67 BRW 1977 2 337.71 BRW 1977 3 338.31 BRW 1977 4 339.41 BRW 1977 5 339.69 BRW 1977 6 337.62 BRW 1977 7 331.50 BRW 1977 8 326.29 BRW 1977 9 327.28 BRW 1977 10 331.01 BRW 1977 11 334.62 BRW 1977 12 337.44 BRW 1978 1 339.84 BRW 1978 2 341.03 BRW 1978 3 340.96 BRW 1978 4 341.05 BRW 1978 5 340.87 BRW 1978 6 338.93 BRW 1978 7 333.36 BRW 1978 8 327.39 BRW 1978 9 327.70 BRW 1978 10 332.42 BRW 1978 11 337.07 BRW 1978 12 338.97 BRW 1979 1 340.08 BRW 1979 2 341.29 BRW 1979 3 342.07 BRW 1979 4 342.33 BRW 1979 5 343.20 BRW 1979 6 341.32 BRW 1979 7 333.81 BRW 1979 8 327.38 BRW 1979 9 328.90 BRW 1979 10 334.37 BRW 1979 11 337.66 BRW 1979 12 338.64 BRW 1980 1 340.93 BRW 1980 2 342.71 BRW 1980 3 343.29 BRW 1980 4 344.32 BRW 1980 5 345.15 BRW 1980 6 342.89 BRW 1980 7 337.27 BRW 1980 8 332.20 BRW 1980 9 332.53 BRW 1980 10 336.96 BRW 1980 11 340.60 BRW 1980 12 342.97 BRW 1981 1 344.75 BRW 1981 2 345.38 BRW 1981 3 345.44 BRW 1981 4 345.99 BRW 1981 5 346.45 BRW 1981 6 343.86 BRW 1981 7 336.46 BRW 1981 8 330.85 BRW 1981 9 332.60 BRW 1981 10 338.25 BRW 1981 11 342.13 BRW 1981 12 344.40 BRW 1982 1 345.94 BRW 1982 2 347.19 BRW 1982 3 347.81 BRW 1982 4 347.55 BRW 1982 5 347.64 BRW 1982 6 345.69 BRW 1982 7 339.54 BRW 1982 8 333.30 BRW 1982 9 333.20 BRW 1982 10 338.38 BRW 1982 11 342.34 BRW 1982 12 344.87 BRW 1983 1 346.58 BRW 1983 2 347.13 BRW 1983 3 347.59 BRW 1983 4 347.88 BRW 1983 5 348.25 BRW 1983 6 346.51 BRW 1983 7 339.86 BRW 1983 8 333.79 BRW 1983 9 333.95 BRW 1983 10 340.42 BRW 1983 11 345.24 BRW 1983 12 347.01 BRW 1984 1 349.01 BRW 1984 2 350.36 BRW 1984 3 349.94 BRW 1984 4 349.66 BRW 1984 5 350.31 BRW 1984 6 348.36 BRW 1984 7 341.33 BRW 1984 8 335.90 BRW 1984 9 337.47 BRW 1984 10 341.42 BRW 1984 11 344.85 BRW 1984 12 348.12 BRW 1985 1 349.44 BRW 1985 2 349.34 BRW 1985 3 350.33 BRW 1985 4 351.77 BRW 1985 5 352.13 BRW 1985 6 349.53 BRW 1985 7 343.45 BRW 1985 8 337.24 BRW 1985 9 338.36 BRW 1985 10 343.53 BRW 1985 11 347.32 BRW 1985 12 348.87 BRW 1986 1 350.74 BRW 1986 2 352.92 BRW 1986 3 353.38 BRW 1986 4 353.07 BRW 1986 5 353.04 BRW 1986 6 350.33 BRW 1986 7 343.97 BRW 1986 8 338.79 BRW 1986 9 341.89 BRW 1986 10 347.49 BRW 1986 11 350.36 BRW 1986 12 352.04 BRW 1987 1 353.10 BRW 1987 2 353.69 BRW 1987 3 354.10 BRW 1987 4 354.36 BRW 1987 5 354.97 BRW 1987 6 352.87 BRW 1987 7 345.97 BRW 1987 8 340.19 BRW 1987 9 340.91 BRW 1987 10 345.67 BRW 1987 11 349.82 BRW 1987 12 352.65 BRW 1988 1 355.63 BRW 1988 2 357.05 BRW 1988 3 357.28 BRW 1988 4 357.85 BRW 1988 5 357.64 BRW 1988 6 354.96 BRW 1988 7 348.05 BRW 1988 8 343.12 BRW 1988 9 345.04 BRW 1988 10 350.47 BRW 1988 11 354.96 BRW 1988 12 358.06 BRW 1989 1 358.93 BRW 1989 2 358.55 BRW 1989 3 359.56 BRW 1989 4 359.93 BRW 1989 5 359.33 BRW 1989 6 358.33 BRW 1989 7 350.80 BRW 1989 8 342.70 BRW 1989 9 345.07 BRW 1989 10 351.57 BRW 1989 11 355.91 BRW 1989 12 359.27 BRW 1990 1 360.57 BRW 1990 2 361.02 BRW 1990 3 361.61 BRW 1990 4 361.57 BRW 1990 5 361.37 BRW 1990 6 356.70 BRW 1990 7 348.45 BRW 1990 8 344.53 BRW 1990 9 346.86 BRW 1990 10 352.72 BRW 1990 11 356.50 BRW 1990 12 359.73 BRW 1991 1 361.69 BRW 1991 2 361.63 BRW 1991 3 362.05 BRW 1991 4 362.09 BRW 1991 5 361.80 BRW 1991 6 360.00 BRW 1991 7 353.52 BRW 1991 8 346.78 BRW 1991 9 348.37 BRW 1991 10 354.60 BRW 1991 11 358.48 BRW 1991 12 360.46 BRW 1992 1 361.77 BRW 1992 2 361.96 BRW 1992 3 362.28 BRW 1992 4 362.70 BRW 1992 5 362.45 BRW 1992 6 360.14 BRW 1992 7 353.92 BRW 1992 8 347.26 BRW 1992 9 348.22 BRW 1992 10 352.68 BRW 1992 11 356.75 BRW 1992 12 360.68 BRW 1993 1 362.43 BRW 1993 2 362.63 BRW 1993 3 363.27 BRW 1993 4 363.61 BRW 1993 5 363.37 BRW 1993 6 359.55 BRW 1993 7 352.26 BRW 1993 8 347.86 BRW 1993 9 349.77 BRW 1993 10 354.52 BRW 1993 11 358.81 BRW 1993 12 360.99