Previous 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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