Maybe this presentation is now outdated, and so let us take a look at how Lindzen describes the "greenhouse effect" today in
- Reconsidering the Climate Change Act Global Warming: How to approach the science. (Climate Models and the Evidence?)
- Seminar at the House of Commons Committee Rooms Westminster, London 22nd February 2012.
- Adding greenhouse gases to the atmosphere must elevate the average emission level, and because of the first point, the new emission level is colder than the original emission level.
- This reduces the outgoing infrared radiative flux, which no longer balances the net incoming solar radiation.
- Note that this mechanism leads to the simple result that doubling CO2 gives rise to warming of about 1C.
Lindzen here refers to the Basic Postulate of CO2 alarmism of a climate sensitivity of 1C resulting from an application of Stefan-Boltzmann's radiation Law in the form dQ = 4 dT with
dQ = 4 W/m2 of "radiative forcing" from doubling of CO2.
We see that Lindzen no longer puts forward his idea from 1997 of a surface temperature of + 80 C with radiation alone, but instead uncritically adopts the Basic Postulate of CO2 alarmism used by IPCC.
I have argued at length that the Basic Postulate should not be accepted as a starting point, because it is based on a way too simplistic model of the climate system as the simple algebraic
equation dQ = 4 dT setting dQ = 4 by a wild guess and obtaining a dT = 1 without scientific significance.
Richard Lindzen, Roy Spencer, Fred Singer and Lord Monckton all seem to confess to the Basic Postulate and thus give IPCC a free ticket to sell CO2 alarmism.
When I try to discuss the nature of the "greenhouse effect" and the scientific relevance of the Basic Postulate, I meet silence or ridicule from leading skeptics. Reasonable?
I have asked Prof Lindzen for a comment or clarification without any response.
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