A molecule of oxygen is dissociated by absorbing ultraviolet-C radiation with frequencies around 1237 terahertz, energies around 5.1 electronvolts. Since oxygen makes up 20.95% of Earth’s atmosphere, there is ample oxygen to absorb all solar ultraviolet-C of appropriate frequencies that reaches the stratosphere, keeping the stratopause 30 to 40 oC warmer than the tropopause. Thus, the stratosphere forms an “electric” blanket warming Earth—electric in the sense that the thermal energy comes from a distant source, Sun, not from the body under the blanket, Earth.
The second most important photochemical reaction in the stratosphere is dissociation of ozone by ultraviolet-B radiation with frequencies around 967 terahertz, energies around 4.0 electronvolts. While ozone concentrations, even in the ozone layer, are less than 10 parts per million, ozone is continually being formed and dissociated in the endless ozone-oxygen cycle, absorbing most solar ultraviolet-B radiation. When atoms of chlorine reach the lower stratosphere especially in winter, ozone concentrations that normally increase in winter can be depleted. One atom of chlorine, under the right conditions, can destroy 100,000 molecules of ozone. Depletion of the ozone layer allows more ultraviolet-B radiation than normal to reach Earth. Ultraviolet-B radiation is observed to cause sunburn, cataracts, skin cancer and mutations. It also dissociates ground-level ozone pollution, warming air in populated regions and penetrates oceans more than one hundred meters, very efficiently increasing ocean heat content as observed.
Because of the ozone-oxygen cycle, where there are increased concentrations of ozone in the atmosphere, there is increased temperature. Sudden stratospheric warmings of 30-40 oC within days are typically associated with high concentrations of ozone and occur most frequently at altitudes of 30-50 km where dissociation of oxygen and ozone are most efficient.
In 1798, Sir Benjamin Thompson proposed the mechanical theory of heat generated by friction when boring canon. This mechanical theory evolved into two fundamental assumptions: 1) heat is a flux of thermal energy measured in watts per square meter and 2) the greater the amount of flux absorbed, the hotter the body will become. Note that this approach never addresses the issue of what heat or thermal energy are, physically. These two assumptions still dominate physics, thermodynamics, and atmospheric physics. They form the basis for greenhouse-warming theory. They were developed long before we understood the atomic and molecular structure of matter—long before we discovered that the bonds holding matter together are not rigid. We now understand in considerable detail that these bonds oscillate at trillions of cycles per second—the hotter the body, the higher the amplitudes of oscillation and the higher the dominant frequencies of oscillation. We also now understand that heat flux is proportional to temperature difference.
In 1900, Max Planck discovered, by trial and error, an equation that calculates, for thermal radiation from a black body, the observed amplitude of oscillation at each frequency of oscillation as a function of the temperature of the body. Planck’s empirical law not only shows the physical properties of radiation as a function of temperature but also shows the physical properties of oscillations on the surface of matter emitting the radiation and the physical properties of oscillations within the body. Thus, for a body to “possess” the temperature of Sun, the oscillations on its radiating surface must include all the amplitudes of oscillation at all the frequencies of oscillation shown in green, yellow, and red in the lower figure. Planck’s empirical law shows unequivocally that both temperature and heat are the result of a broad continuum of frequencies of oscillation.
Heat is what a body of matter must absorb to increase its temperature and lose to decrease its temperature. The physical properties of heat Earth must absorb to increase its temperature to 3000 oC are described by the yellow-shaded area in the lower figure. Heat is the result of a broad continuum of frequencies of oscillation of all the bonds holding matter together and is proportional to the difference in temperature between the emitter and the absorber. Heat is a broad continuum of values that cannot be described by some single number of watts per square meter as is currently done. In his original formulation, Planck was confused about intensity or amplitude of oscillation, putting energy on the y-axis even though he postulated that energy equals frequency times a constant on the x-axis as shown. Radiation only consists physically of frequencies and amplitudes of oscillation.
Note that a hotter body has a higher amplitude of oscillation at each frequency of oscillation and has a higher frequency of oscillation at the dominant amplitude of oscillation. This is why a body of matter can only be warmed by a hotter body of matter. A body cannot be warmed in any way by its own radiation, as assumed in greenhouse-warming theory, because its own radiation does not contain the higher amplitudes of oscillation at every frequency of oscillation required to increase temperature. The greater the difference in temperature, the greater the difference in amplitudes of oscillation especially at higher frequencies. This is why Earth is heated far more efficiently by ultraviolet-B radiation than by visible light or infrared radiation.
Today, most climate scientists are so convinced that global warming is caused by increases in greenhouse gas concentrations that they refuse to even consider the reality that greenhouse-warming theory is physically impossible as explained cogently at Physically-Impossible.com. This creates a crisis in climate science because they are urging world leaders to spend tens of trillions of dollars right now to reduce greenhouse-gas emissions. The details are explained at WhyClimateChanges.com.