Monthly atmospheric CO2 mixing ratios from Cape Meares, Oregon, U.S.
Background atmospheric CO2 mixing ratios from individual flask air samples for
Cape Meares, Oregon, U.S. Only measurements satisfying the data selection criteria fro background
measurements are plotted. Consecutive background measurements are joined by lines. Background
measurements interrupted by non-background measurements are not joined by lines.
Monthly atmospheric CO2 mixing ratios for Cape Meares, Oregon,U.S., expressed in parts per million (ppm) and reported
in the Scripps Institution of Oceanography X93 manometric mole fraction scale. Annual values were calculated by
CDIAC for years with complete records. Missing values are denoted by -99.99.
Year Jan Feb Mar April May June July Aug Sept Oct Nov Dec Ann
1982 -99.99 -99.99 344.63 345.07 344.85 342.09 337.72 334.77 335.82 338.77 340.58 342.11 -99.99
1983 343.32 343.95 345.55 347.10 345.21 342.61 340.25 335.93 337.11 341.82 345.15 347.84 342.99
1984 347.53 346.97 348.06 348.71 347.73 343.31 339.83 339.86 340.99 341.91 344.76 349.43 344.92
1985 351.24 349.37 348.83 349.86 349.97 347.79 343.78 340.78 343.02 345.73 347.52 350.33 347.35
1986 351.80 351.48 350.87 350.68 350.89 349.54 342.69 340.37 345.05 346.54 347.87 350.32 348.18
1987 351.85 352.09 352.39 354.42 354.11 351.04 346.31 344.11 348.55 353.17 352.37 352.67 351.09
1988 354.62 355.55 355.76 356.33 355.72 353.29 349.51 346.82 348.15 349.87 351.51 354.75 352.66
1989 357.28 357.77 356.75 356.39 356.90 354.70 349.05 347.37 351.47 354.27 354.48 355.82 354.35
1990 356.97 357.14 358.32 358.75 357.68 355.06 351.50 349.66 351.19 353.78 356.35 358.30 355.39
1991 358.70 359.45 359.99 359.56 359.00 356.99 351.98 349.12 353.67 357.42 357.38 357.30 356.71
1992 359.62 361.22 360.45 359.59 359.82 357.57 352.18 347.50 348.98 353.82 356.89 360.03 356.47
1993 362.80 361.31 360.42 361.70 360.63 356.55 352.51 351.07 353.69 358.69 361.34 360.45 358.43