In uk.sci.weather on Sat, 28 Apr 2007, Russel Sprout
wrote :

What is the mechanism by which the temperature *rises* when clouds come
over on otherwise clear nights*?

Common sense suggests that the most they could do would be to halt the
drop in temperature. After all, a rise in temperature *should* require a
heat source, and those are absent at night.

A heat source is ceratinly not absent at night.What is the soil temerature
at, say, 10 cm?

I don't measure that - but in any case, the 4" soil temperature doesn't
vary by 1C or more over a matter of half an hour, as the air temperature
does when cloud comes in, on an otherwise clear night.
--
Paul Hyett, Cheltenham (change 'invalid83261' to 'blueyonder' to email me)