Soren wrote on Oct 14
th, 2011 at 8:11pm:
It's all the greenhouse gases tht keep the earth warm, not the 0.03.5 of the atmospheric CO2.
The atmosphere of Mars is 95% CO2, yet it's a very cold place. Even allowing for the added distance, by your reckoning, it shouldn't be so cold with so much CO2 in the atmosphere. If 0.03% atmospheric CO2 here can make a difffrence of 30 degrees, 95% a bit further out in the solar system should make 95 x 0.03 less proportion of distance difference. But it doesn't. Why?
How about the fact that the Martian atmosphere is pretty close to a vacuum, has extremely little water vapour and the fact that comparing it to the Earth is like chalk and cheese. Soren, please - you are recycling this old argument yet again.
If we reduced the CO2 concentration in the atmosphere on Earth, what would happen?
Well it would start to get colder and the atmosphere would hold less moisture - water is a very significant Greenhouse gas. CO2 and water vapour go hand in hand. Increase the temperature on Earth and the CO2 increases and the water vapour increases.
By the same token, increase the CO2 and the temperature and thus the water vapour concentration increases.
Look, I'm sure that some 18th Century philosopher would be proud of you, but these days we do actually know a fair bit about the properties of matter, and the atmosphere.
- but of course I very much doubt if you want to acknowledge understanding in any way. It would spoil the sport.