CO2
1ppm global CO2 is how many tonnes of carbon?
The mass of the atmosphere is 5.15e18 kg. We will assume mole fraction is proportional to volume fraction
Gas |
Mole Fraction |
At wt |
Mass*e12 kg |
N2 Nitrogen |
0.7808 |
28 |
4054226 |
O2 Oxygen |
0.2095 |
32 |
1087808 |
Ar Argon |
0.0093 |
40 |
48289 |
CO2 Carbon Dioxide |
0.0004 |
48 |
2077 |
Dry air atomic wt |
1.0000 |
28.9576 |
5129400 |
|
|||
|
0.9960 |
28.9576 |
5129400 |
H2O Water |
0.0040 |
18 |
20600 |
Wet air atomic wt |
1.0000 |
28.9138 |
5150000 |
So, 400ppm CO2 is 2077e12 kg, of which 12/44 is carbon