The Concept of Precipitable Water (PW)


As many chemtrail people try to convince others that barium salts in chemtrails absorb atmospheric water, this post offers a way to debunk this claim.

The definition of precipitable water (PW) is the following (from Wikipedia):

The derivation of formulas can be found here:

To make it more intuitive, one should remember that 1 mm layer of water is equal to 1 kg/m^2 per column. So typical value 30 mm of PW means 30 kg/m^2 of water. And it's just one square meter. Now imagine PW over a city, over a country. It's a pretty impressive number, isn't it? :)

And they still say that small quantities of salts can absorb moisture.
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