[thaumasiotes]

> areas that would not significantly suffer from a marginal reduction of rainfall (the oceans, the arctics, mountain ranges)

Agreed as to the ocean and the arctic, but precipitation over mountain ranges is generally recovered by lower-altitude communities when the water eventually flows down to them.

Snowmelt has been a major source of water historically.

[eloff]

Also the artics are essentially cold deserts, they don't get much precipitation and there is likely very little that could trace its origin to the hot deserts of the world.

[Cogito]

That's not really true.

Parts of the arctics are definitely deserts, but that is not true for all of the arctic regions.

Looking at the relevant parts of wikipedia [0] and [1], "annual precipitation averaged over the whole planet is about 1000 mm" while "parts of southeast Greenland [recieve] over 1200 mm". Antarctica has a lot less precipitation in general, but there are still large parts of it that are not classified as desert.

[0] https://en.wikipedia.org/wiki/Climate_of_the_Arctic#Precipit...

[1] https://en.wikipedia.org/wiki/Climate_of_Antarctica#Precipit...