On Sat, 28 Apr 2007 23:57:06 +0100, "Bernard Burton"
wrote:

Clouds absorb and re-radiate downwards the upwelling long-wave radiation
from the surface. When cloud cover replaces clear sky the surface radiation
continues, but can no longer escape to space. The air temperature near the
surface rises towards the ground temperature until a new balance is
achieved.

But how can that cause a temperature rise?


--

"Perhaps the meek shall inherit the Earth, but they'll do it
in very small plots - about 6' by 3'."
-- Robert A. Heinlein