 |
Activity 3: Keeling's Data, 1960-1964*
| Month:
|
1960
|
1961
|
1962
|
1963
|
1964
|
| January
|
316.43
|
316.93
|
317.94
|
318.74
|
319.57
|
| February
|
316.97
|
317.70
|
318.56
|
319.08
|
|
| March
|
317.58
|
318.54
|
319.68
|
319.86
|
|
| April
|
319.02
|
319.48
|
320.63
|
321.39
|
|
| May
|
320.03
|
320.58
|
321.01
|
322.24
|
322.24
|
| June
|
319.59
|
319.77
|
320.55
|
321.47
|
321.89
|
| July
|
318.18
|
318.57
|
319.58
|
319.74
|
320.44
|
| August
|
315.91
|
316.79
|
317.40
|
317.77
|
318.70
|
| September
|
314.16
|
314.80
|
316.25
|
316.21
|
316.70
|
| October
|
313.83
|
315.38
|
315.42
|
315.99
|
316.79
|
| November
|
315.00
|
316.10
|
316.69
|
317.12
|
317.79
|
| December
|
316.19
|
317.01
|
317.69
|
318.31
|
318.71
|
*monthly average concentrations of atmospheric carbon dioxide (ppm) at Mauna Loa
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