Dear elir...:

On Tuesday, November 5, 2013 12:04:46 PM UTC-7, wrote:

Good work replying to a 5 year old thread, and posting off-topic in an astronomy newsgroup.

The lowest level of the atmosphere in contact
with the oceans is pretty well saturated, but
to reach the rest of the atmosphere the water
vapor has to move away, driven by convection
or winds. As the vapor rises it cools because
the higher you go in the atmosphere, the colder
it is. And, of course, as the water vapor
cools it will form clouds, and eventually
precipitate, so the atmosphere away from the
marine boundary layer will not be saturated
except in isolated places and then it rains
and it is no longer saturated.

Saturation not required, increases *only* required.

http://blogs.agu.org/wildwildscience...0_1280x960.png
.... see the red stripe around the equator? This is trade winds lofting water vapor.
http://en.wikipedia.org/wiki/Polar_stratospheric_cloud
http://en.wikipedia.org/wiki/Noctilucent_cloud
.... not seen until after the Industrial Revolution.

Moisture is not required to produce increased rainfall, if it is matched with increases in temperature.

David A. Smith