 |
Activity 4: Keeling's Data, 1965-1969*
Month:
|
1965
|
1966
|
1967
|
1968
|
1969
|
January
|
316.25>
|
316.84>
|
318.13>
|
318.60>
|
320.08>
|
>February
|
317.32
|
317.82
|
318.54
|
319.16
|
320.85
|
March
|
317.80
|
318.69
|
318.99
|
319.91
|
321.90
|
April
|
318.92
|
319.83
|
320.45
|
320.89
|
322.82
|
May
|
318.96
|
320.09
|
320.89
|
321.46
|
323.46
|
June
|
318.80
|
319.81
|
319.91
|
321.40
|
322.76
|
July>
|
318.15>
|
318.90>
|
318.67>
|
320.00>
|
321.89>
|
>August
|
315.80
|
316.31
|
317.09
|
317.98
|
319.61
|
September
|
314.68
|
314.52
|
315.46
|
316.57
|
318.56
|
October>
|
314.39>
|
314.17>
|
315.36>
|
316.27>
|
318.03>
|
>November
|
315.81
|
315.95
|
316.75
|
317.17
|
318.94
|
December
|
316.92
|
317.07
|
318.06
|
318.65
|
320.35
|
*monthly average concentrations of atmospheric carbon dioxide (ppm) at Mauna Loa
|

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