Does the emissions (28 billion tons of CO2 annually) affect the Atmospheric Pressure on Earth in any way?

Theoretically, by releasing approximately 10.5 Billion Tons of carbon (annually), previously locked up in fossil fuels, shouldn't you see some type of an effect in the amount of (atmospheric) pressure being exerted on us? This should be measurable unless it is far too minute. Just some quick calculation I came up that in one year it should increase atmospheric pressure by about 2.5 psi. However, I don't know how much carbon the Ocean also absorbs. even if it is half of the carbon (or CO2) it would still result in a yearly increase of 1.25psi of atmospheric pressure. Please help me understand what I am missing.