The greenhouse effect refers to the retention of heat by the earth’s atmosphere. Although “greenhouse” is a handy analogy to a botanical greenhouse, which insulates an indoor space by regulating convection, the atmosphere retains heat in a different way. It happens because gas molecules absorb some of the heat radiating from the ground (see infrared radiation), so that it all doesn’t escape into outer space. It was discovered in 1824 by Joseph Fourier. The effect has been compared to that of the glass roof and walls of a greenhouse, although the process is different. A gardener’s greenhouse simply traps warm air inside the building.
Runaway greenhouse effect
A runaway greenhouse effect has been claimed by some climate scientists, many of whom are involved in Climategate, and have argued that slight increases in trace gases in the Earth’s atmosphere would lead to higher air temperatures. These higher temperatures would in turn cause “greenhouse gases” such as carbon dioxide to have higher concentrations, which in turn would accelerate the warming trend. Alarming increases of 3 to 15 degrees Fahrenheit have been predicted, as modeled in Al Gore’s hockey stick graph. Outside of the political sphere, few academics give any credence to this theory, and many scientists have been critical of the hockey stick reconstruction.
MIT professor Richard Lindzen wrote:
It is still of interest to ask what we would expect a doubling of carbon dioxide to do. A large number of calculations show that if this is all that happened, we might expect a warming of from .5 to 1.2 degrees centigrade. The general consensus is that such warming would present few, if any, problems. […] current models depend heavily on undemonstrated positive feedback factors to predict high levels of warming.[9]
Another professor wrote:
Computer models suggest that a doubling of the concentration of the main greenhouse gas, carbon dioxide, may raise the average global temperature between 1 and 3° Celsius. However, the numeric equations of computer models do not accurately simulate the effects of a number of possible negative feedbacks. For example, many of the models cannot properly simulate the negative effects that increased cloud cover would have on the radiation balance of a warmer Earth. Increasing the Earth’s temperature would cause the oceans to evaporate greater amounts of water, causing the atmosphere to become cloudier. These extra clouds would then reflect a greater proportion of the Sun’s energy back to space reducing the amount of solar radiation absorbed by the atmosphere and the Earth’s surface. With less solar energy being absorbed at the surface, the effects of an enhanced greenhouse effect may be counteracted.[10]
Source: Conservapedia
Geraint Hughes conducted an experiment comparing the difference in maximum temperature of a flat plate, in a vacuum chamber compared with the same flat plate with a mini-greenhouse on it to see if the one with the glass greenhouse on it is cooler or warmer than the flat plate on its own. If RGHE fake theory was to be believed, the back radiance from the greenhouse would make the plate warmer than if it was on its own, but it wasn’t. What happened was it was cooler. Radiation greenhouse effect is a lie. Greenhouses are only warmer in real conditions because of “RESTRICTED CONVECTIVE CURRENTS” nothing else. Not back radiance. See experiment results here…
