CO2 dissolving in rain

[craigru]

I'm wondering - What percent of CO2 is removed by rain? (e.g. if CO2 was 392 ppm before a rainstorm, or a light drizzle, what is it after?)

Of course, the answer will be complex -- because % removal will depend on rate and duration of rainfall, and maybe altitude of CO2 above earth's surface (is it above or below rain-clouds), winds, and so on. But what are the typical results?

Any helpful information will be appreciated. Thank you.

background: Although CO2 is nonpolar, it's slightly soluble in rain (1.45 g/L) due to the reaction "H2O + CO2 -> H2CO3" which then forms H+/H3O+ and HCO3- (with Ka = 4.6 x 10*-7) to produce a pH of about 5.6 in normal unpolluted rain. This water-solubility of CO2 (in oceans,...) is a major factor in the global carbon cycle, along with photosynthesis-and-respiration.

I don't think rainfall causes any significant overall GLOBAL change, but what can it do LOCALLY?

Craig