WHY does aeration raise ph?

[Thepow]

I understand that aeration, by itself, raises ph but don't know WHY?

[Watermom]

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[CarlD]

Vaguely and loosely, it's like knocking carbonation out of soda, which makes it flat but less acid. It's actually carbonic acid molecules, I believe, that get converted.

[chem geek]

Aeration increases the rate of carbon dioxide outgassing from the water. Removing carbon dioxide from water is effectively the same as removing carbonic acid (which is a combination of carbon dioxide and water) and removing an acid raises the pH.

Pool water is intentionally over-carbonated in order to provide a pH buffer and along with CH to saturate the water with calcium carbonate to protect plaster surfaces.

[Thepow]

Or beer going flat....I'm told that happens but mine never lasts long enough to find out.
Anywho, thanks guys. I need to do what to do but sometimes it helps to know why I'm doing it.