Mesures de la concentration atmosphérique en dioxyde de carbone exprimée en p.p.m. (partie par million) de 1958 à 1999 réalisées par l'université de Californie à Maunaloa

 

En septembre 2019 cette concentration de CO2 dans l'atmosphère est de 415 ppm

******************************************************************* *** Atmospheric CO2 concentrations (ppmv) derived from in situ *** *** air samples collected at Mauna Loa Observatory, Hawaii  Source: C.D. Keeling *** *** T.P. Whorf *** *** Scripps Institution of Oceanography (SIO) *** *** University of California *** *** La Jolla, California USA 92093-0244 *** *** *** *** August 16, 2000 *** *** *** *******************************************************************

Atmospheric concentrations of CO2 are expressed in parts per million (ppm) and reported in the 1997 SIO manometric mole fraction scale. Missing values are denoted by -99.99.

 

Year  Jan.     Feb.     March     April     May    June     July     Aug.    Sept.     Oct.     Nov.     Dec.     Annual

1958 -99.99 -99.99 315.56 317.29 317.34 -99.99 315.69 314.78 313.05 -99.99 313.18 314.50 -99.99

1959 315.42 316.31 316.50 317.56 318.13 318.00 316.39 314.65 313.68 313.18 314.66 315.43 315.83

1960 316.27 316.81 317.42 318.87 319.87 319.43 318.01 315.74 314.00 313.68 314.84 316.03 316.75

1961 316.73 317.54 318.38 319.31 320.42 319.61 318.42 316.63 314.83 315.16 315.94 316.85 317.49

1962 317.78 318.40 319.53 320.42 320.85 320.45 319.45 317.25 316.11 315.27 316.53 317.53 318.30

1963 318.58 318.92 319.70 321.22 322.08 321.31 319.58 317.61 316.05 315.83 316.91 318.20 318.83

1964 319.41 -99.99 -99.99 -99.99 322.06 321.73 320.27 318.53 316.54 316.72 317.53 318.55 -99.99

1965 319.27 320.28 320.73 321.97 322.00 321.71 321.05 318.71 317.66 317.14 318.70 319.25 319.87

1966 320.46 321.43 322.23 323.54 323.91 323.59 322.24 320.20 318.48 317.94 319.63 320.87 321.21

1967 322.17 322.34 322.88 324.25 324.83 323.93 322.38 320.76 319.10 319.24 320.56 321.80 322.02

1968 322.40 322.99 323.73 324.86 325.40 325.20 323.98 321.95 320.18 320.09 321.16 322.74 322.89

1969 323.83 324.26 325.47 326.50 327.21 326.54 325.72 323.50 322.22 321.62 322.69 323.95 324.46

1970 324.89 325.82 326.77 327.97 327.91 327.50 326.18 324.53 322.93 322.90 323.85 324.96 325.52

1971 326.01 326.51 327.01 327.62 328.76 328.40 327.20 325.27 323.20 323.40 324.63 325.85 326.16

1972 326.60 327.47 327.58 329.56 329.90 328.92 327.88 326.16 324.68 325.04 326.34 327.39 327.29

1973 328.37 329.40 330.14 331.33 332.31 331.90 330.70 329.15 327.35 327.02 327.99 328.48 329.51

1974 329.18 330.55 331.32 332.48 332.92 332.08 331.01 329.23 327.27 327.21 328.29 329.41 330.08

1975 330.23 331.25 331.87 333.14 333.80 333.43 331.73 329.90 328.40 328.17 329.32 330.59 330.99

1976 331.58 332.39 333.33 334.41 334.71 334.17 332.89 330.77 329.14 328.78 330.14 331.52 331.98

1977 332.75 333.24 334.53 335.90 336.57 336.10 334.76 332.59 331.42 330.98 332.24 333.68 333.73

1978 334.80 335.22 336.47 337.59 337.84 337.72 336.37 334.51 332.60 332.38 333.75 334.78 335.34

1979 336.05 336.59 337.79 338.71 339.30 339.12 337.56 335.92 333.75 333.70 335.12 336.56 336.68

1980 337.84 338.19 339.91 340.60 341.29 341.00 339.39 337.43 335.72 335.84 336.93 338.04 338.52

1981 339.06 340.30 341.21 342.33 342.74 342.08 340.32 338.26 336.52 336.68 338.19 339.44 339.76

1982 340.57 341.44 342.53 343.39 343.96 343.18 341.88 339.65 337.81 337.69 339.09 340.32 340.96

1983 341.20 342.35 342.93 344.77 345.58 345.14 343.81 342.21 339.69 339.82 340.98 342.82 342.61

1984 343.52 344.33 345.11 346.88 347.25 346.62 345.22 343.11 340.90 341.18 342.80 344.04 344.25

1985 344.79 345.82 347.25 348.17 348.74 348.07 346.38 344.51 342.92 342.62 344.06 345.38 345.73

1986 346.11 346.78 347.68 349.37 350.03 349.37 347.76 345.73 344.68 343.99 345.48 346.72 346.97

1987 347.84 348.29 349.23 350.80 351.66 351.07 349.33 347.92 346.27 346.18 347.64 348.78 348.75

1988 350.25 351.54 352.05 353.41 354.04 353.62 352.22 350.27 348.55 348.72 349.91 351.18 351.31

1989 352.60 352.92 353.53 355.26 355.52 354.97 353.75 351.52 349.64 349.83 351.14 352.37 352.75

1990 353.50 354.55 355.23 356.04 357.00 356.07 354.67 352.76 350.82 351.04 352.69 354.07 354.04

1991 354.59 355.63 357.03 358.48 359.22 358.12 356.06 353.92 352.05 352.11 353.64 354.89 355.48

1992 355.88 356.63 357.72 359.07 359.58 359.17 356.94 354.92 352.94 353.23 354.09 355.33 356.29

1993 356.63 357.10 358.32 359.41 360.23 359.55 357.53 355.48 353.67 353.95 355.30 356.78 356.99

1994 358.34 358.89 359.95 361.25 361.67 360.94 359.55 357.49 355.84 356.00 357.59 359.05 358.88

1995 359.98 361.03 361.66 363.48 363.82 363.30 361.94 359.50 358.11 357.80 359.61 360.74 360.91

1996 362.09 363.29 364.06 364.76 365.45 365.01 363.70 361.54 359.51 359.65 360.80 362.38 362.69

1997 363.23 364.06 364.61 366.40 366.84 365.68 364.52 362.57 360.24 360.83 362.49 364.34 363.82

1998 365.38 366.21 367.37 368.68 369.36 368.94 367.72 365.85 363.99 364.32 365.55 367.06 366.70

1999 368.24 368.95 369.66 371.20 371.06 370.41 369.33 367.00 364.70 365.18 366.72 368.05 368.37