But cloud formation in the 21st century — hard enough for weather
forecasters to predict for tomorrow — is among the remaining puzzles.

“Large
uncertainties remain about how clouds might respond to global climate
change,” according to a draft of the report under review by the
Intergovernmental Panel on Climate Change (IPCC), meeting in Paris.

Warmer
air can absorb more moisture, meaning more clouds and so more rain and
snow in many regions. But much more cloud cover might also brake
warming because more sunlight will bounce off the white tops back into
space.

Clouds a puzzle for U.N. global warming panel | Tech&Sci | Science | Reuters.com

I have been saying this for years. <sigh> hotter air means more evaporation which means more clouds which means higher albedo which means more ligfht reflected from warming up the earth which means cooler temps which means less clouds etc…

~KM