On 09/10/2013 16:10, dennis@home wrote:
Greenhouses do work. That is why the term greenhouse effect was coined
in the first place to describe what greenhouse gases do but the
mechanism is different as most people ready understand even if the likes
of TFP deny that there is any positive feedback involved.


The mechanism is the same, trap longer wavelengths of light and warm the
insides up.
If you think the mechanism is different then maybe you should explain
your mechanism.

TFP gave you a helpful tip just upthread. You really should have taken
note of it as you are both on the same side.

The greenhouse effect is in essence simple. The greenhouse gas absorbs
infra-red radiation and re-radiates it equally in all directions. The
net result is that the amount of uv that eventually radiates into space
is significantly less than would have radiated had there been no
greenhouse gases to intercept it. This is inconsequential in a
greenhouse both because there is only a 6 foot column of air, not the 6
mile column in the atmosphere and, much more importantly, the air
outside the greenhouse is much the same as the air inside and it is the
difference in temperature between outside and inside that makes a
greenhouse so useful. Greenhouses work by trapping warm air which, if
not contained, would naturally rise.
--
Roger Chapman