Blocking/ reflecting/ absorbing/ radiating/ ????
Upwards, downwards.
More clouds, less UV heating during day, but more containment of heat during night. Net effect ? , depends on density, type, altitude of clouds.
New peer reviewed paper: clouds have large negative cooling effect on Earth’s radiation budget
More Complexity Found In The Climate System Clouds http://pielkeclimatesci.wordpress.com/2011/08/24/more-complexity-found-in-the-climate-system/
Send in the clouds, there ought to be clouds (in models)