X = [0.0405 kPa)/ (5 kPa) ](0.000041) = 0.332 x 10-6
at 15°C. The rate of decrease of X near 15°C with a temperature increase at the partial pressure of 400 ppm at a temperature of 15°C is then
dX /dT = [0.0405 kPa)/ (5 kPa) ] ( - 1.3 x 10-6 / K) = - 0.0105 x 10-6 / K.
X = 0.332 x 10-6 - 0.007 x 10-6 = 0.325 x 10-6
due to the temperature increase of 0.7 K. The mole fraction was therefore reduced to 97.9% of its prior value by the 0.7 K temperature increase.
Now, one's first thought about where the huge natural CO2 emissions are coming from would be that it might be the oceans, but as we saw above, the oceans are a large sink for added CO2. They are not the source. Things are getting mighty interesting! Scientists clearly need to spend more time learning about nature and a little less trying to damn mankind. Unfortunately, they are clearly being paid by most governments and the UN to make a case, no matter how, that mankind is evil and determined to destroy the planet.