Dear All scientists;
How can we calculate the concentration of CO2 emitted in the air in PPM?
shall we use PPMv(Volume PPM) or Mass PPM is also acceptable?
Regards
No - the mass of the air it mixes with, not the volume. And within a very few years it can be assumed to be fully mixed.
So, if the atmosphere has a pressure of 101.15 kPa at the earth's surface, in a gravitational field of 9.81 N/kg, then there is a mass of 10.3 T of air over every square meter of land, which turns into 5.26 e18 kg. If the atmosphere was 'thick' relative to the diameter of the earth, then the calculation would be much more sophisticated. As the vast majority of the atmosphere is within 100km of the surface, and the radius o the planet is about 6400 km, it is relatively 'thin', so this complexity can be ignored.
So, 1000T of CO2 adds 1.9e-7 ppm to what is there right now.
Because it's fully dispersed, it is really hard to talk about atmospheric CO2 in PPMv (since the CO2 and the atmosphere occupy the same volume. It pretty much has to be in PPMm.
The calculation requires an assumption about the volume of air the CO2 mixes with
No - the mass of the air it mixes with, not the volume. And within a very few years it can be assumed to be fully mixed.
So, if the atmosphere has a pressure of 101.15 kPa at the earth's surface, in a gravitational field of 9.81 N/kg, then there is a mass of 10.3 T of air over every square meter of land, which turns into 5.26 e18 kg. If the atmosphere was 'thick' relative to the diameter of the earth, then the calculation would be much more sophisticated. As the vast majority of the atmosphere is within 100km of the surface, and the radius o the planet is about 6400 km, it is relatively 'thin', so this complexity can be ignored.
So, 1000T of CO2 adds 1.9e-7 ppm to what is there right now.
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