Monthly atmospheric CO2 mixing ratios from St. Croix, Virgin Islands.
Background atmospheric CO2 mixing ratios from individual flask air samples for
St. Croix, Virgin Islands. 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 at St. Croix, Virgin Islands 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
1979 -99.99 -99.99 339.35 340.66 340.59 338.81 334.64 332.48 333.35 334.74 336.25 337.64 -99.99
1980 -99.99 -99.99 -99.99 -99.99 -99.99 -99.99 -99.99 -99.99 335.39 335.82 338.10 340.00 -99.99
1981 341.01 341.83 342.82 343.79 343.16 342.04 340.64 337.89 336.32 336.78 338.20 340.03 340.38
1982 342.03 343.01 343.36 343.85 343.98 343.22 340.94 337.40 336.25 337.63 339.42 341.06 341.01
1983 341.97 343.04 344.64 344.87 344.16 344.64 342.26 339.05 339.66 339.78 338.87 340.42 341.95
1984 343.22 344.61 345.48 347.03 347.92 347.03 343.66 339.86 338.52 339.50 341.09 343.46 343.45
1985 345.56 345.85 346.30 347.61 348.56 348.28 345.90 343.25 342.25 342.44 344.11 345.82 345.49
1986 346.44 347.46 348.89 349.26 349.43 349.07 346.72 344.18 343.07 343.87 345.63 347.08 346.76
1987 347.83 349.02 350.68 351.56 350.93 349.57 348.16 346.74 345.53 345.46 347.20 349.16 348.49
1988 350.42 351.66 353.04 354.05 354.63 353.62 351.02 348.80 348.35 349.04 350.56 352.03 351.44
1989 353.24 354.00 354.68 355.79 356.56 355.45 353.39 351.33 350.33 350.72 352.19 353.77 353.45
1990 354.59 355.58 356.61 357.30 357.62 357.03 354.44 351.33 -99.99 -99.99 -99.99 -99.99 -99.99