Not the alleged culprit carbon dioxide, but CFCs have been causing global warming since the 1970s. So suggests new research from the University of Waterloo in the journal International Journal of Modern Physics B was published on May 30, 2013.
CO2 known greenhouse gas, but ...
Research of the nineteenth century physicist Svante Arrhenius, who discovered the infrared blocking effect of carbon dioxide at an early stage, already showed that carbon dioxide generates a greenhouse effect. According to him, a doubling of the amount of carbon dioxide in the atmosphere, from 350 ppm to 700 ppm at the time, would lead to a warming of four to eight degrees. At the moment, the carbon dioxide content has risen to 400 ppm; one degree of temperature rise is attributed to this by the scientific community, including climate dissidents such as Henrik Svensmark. According to mainstream climate scientists, the real greenhouse effect is much greater. However, climatic observations show that the temperatures have not increased further since 2002, and according to some even have decreased, while the CO2 content is still rising. What is going on?
Narrow radiation window as an outlet valve
The earth is constantly exchanging energy with the environment. The main source of energy is solar radiation, mainly visible light, which is absorbed and released in the form of infrared radiation. The reason that the earth is fifteen degrees warmer than, for example, the moon, and that the temperatures on earth drop very little at night, is the presence of greenhouse gases. The most important are carbon dioxide (blocks IR radiation with a wavelength greater than 13 micrometers) and water vapor (blocks IR radiation with a wavelength between 5-8.3 μm and 11-17 μm). The lion's share (80%) of the Earth's heat radiation is therefore emitted in the small wavelength range between 8 and 13 micrometers. When this narrow window is closed, the soil turns into a pressure cooker and the temperatures on Earth rise quickly. A higher temperature means that shorter-wave radiation is emitted, and at the same time more water vapor is released into the air due to evaporation - precisely the greenhouse gas that blocks short-wave radiation. In theory, this can cause global warming to get completely out of hand. The fear of many climate scientists.
CFCs block 'window'
However, blocking radiation in the narrow window between 8 and 13 micrometers is exactly what chlorofluorocarbons, once used en masse in refrigerators, do. As a result, even a small amount of CFCs can have a major influence on the climate. According to Lu, this is exactly what is happening and the rapid increase in the amount of CFCs in the atmosphere explains the temperature increase until 2002. Because, Lu argues, the concentrations of other greenhouse gases are already 'saturated', ie an additional increase does not produce an additional greenhouse effect, and that of CFCs not yet, an increase in the CFC content will have an even greater impact. However, due to the worldwide ban on CFCs, the concentration of these unpleasant substances is slowly declining. Lu argues that this is the reason why the increase in the surface temperature on Earth is stagnating. He also points out that carbon dioxide, generally seen as the culprit for global warming, did not begin to decline until 800 to 1,000 years after the onset of the Ice Age. Incidentally, ozone (O3), the gas that protects life on the earth's surface against harmful UV radiation, is also a powerful greenhouse gas in precisely this area. According to Lu, this explains why temperatures in Antarctica dropped sharply and the ice grew in the years when the hole in the ozone layer was the largest.
'Near-perfect correlation between CFC content and temperature'
“The climate in the Antarctic stratosphere has been completely controlled by CFCs and cosmic rays, with no CO2 impact. The change in global surface temperature after the removal of the solar effect has shown zero correlation with CO2 but a nearly perfect linear correlation with CFCs - a correlation coefficient as high as 0.97. ”, Professor Lu concludes. . According to Lu's cosmic-ray-driven electron-reaction (CRE) theory, cosmic rays determine how quickly CFCs and ozone are broken down. According to Lu, a period of intense cosmic rays coincided with the advance of CFCs, which explains the deep hole in the Anthropic ozone layer. The supporters of the mainstream global warming theory will probably reply to Lu viciously, as is usual in the climate world. However, it is clear that the discontinuation of the use of CFCs did not happen a year too soon.
Qing-Bin Lu, Cosmic-Ray-Driven Reaction and Greenhouse Effect of Halogenated Molecules: Culprits for Atmospheric Ozone Depletion and Global Climate Change, University of Waterloo, International Journal of Modern Physics B Full. 27 (2013) (preprint here)