Posted by Nigel Worthington on February 23, 2008, 3:52 pm, in reply to "The Physics of CO2 and Greenhouse gas"
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No I had not seen this paper and your link still works. Many thanks for this. Some of the maths is also beyond me, nevertheless there are some interesting points made. In particular his simple experiment of two boxes - one with glass panes (which prevent the re-emission of reflected radiation) and one with rock-salt (which allows re-emission). This is in Section 2.5 on page 32. There was little difference in temperature in the 2 boxes and it supports his maths that a real greenhouse works not by "trapping" infrared radiation but by lack of cooling.
We do know that computer models simulating the greenhouse effect in the earth's atmosphere do not seem to be working. They fail to account for the lack of further global warming since 1998 despite increasing CO2 levels, the difference between northern and southern hemispheres (with actual cooling in Antarctica) and the fact that the upper troposphere has not warmed faster than the earth's surface.
It would not surprise me if Gerhard Gerlich is eventually proved right. Do you remember the fuss over CFCs and ozone layer depletion? This has now been proved false (even though a Nobel prize was awarded at the time). And of course the worries of global cooling in the 1970s were short lived.
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