The foundation of the greenhouse theory is that 'greenhouse' gases absorb infrared radiation from the earth and then 'back-radiate' this energy to the earth to cause global warming. Several prior posts have illustrated that the concepts of greenhouse gas 'back-radiation,' 'heat-trapping,' 'heat capture,' and 'radiative forcing' are essentially all referring to the same unphysical, fundamental error of the greenhouse theory that cannot be found in textbooks of physics. Several commenters have indicated that they think it is impossible to explain the temperatures of the earth and atmosphere without incorporating 'greenhouse gases' and 'back-radiation' in diagrams of the Earth's energy budget, such as the famous Kiehl/Trenberth/IPCC Energy Budget, which shows 'back-radiation' to be a very significant 324 W/m2 (95% of the average solar input!) at all times 24/7/365.
However, the earth-atmosphere system can be much more simply described (see Occam's Razor) with real physics without using 'greenhouse gases' or 'back-radiation' at all. Here are five Earth Energy Budgets which completely explain the earth-atmosphere system without 'greenhouse gases' or 'back-radiation,' in stark contrast to the IPCC alarmist & unphysical Energy Budget:
1. Vaclav Smil, Energies: An Illustrated Guide to the Biosphere and Civilization, The MIT Press, 2000:
2. Richard M. Goody, Principles of Atmospheric Physics and Chemistry, The Oxford University Press, 1995:
3. EOS-Web, NASA Langley Research Center, which is the same as Smil 1999 (who copied who?)
4. Lettau, 1954
5. Source Pending
Without the foundations of 'back-radiation,' 'heat-trapping,' 'heat capture,' and 'radiative forcing,' the 'greenhouse gas' theory collapses like a house of cards, and adding additional trace CO2 has no measurable effect upon the climate.