“Here is the picture. The Earth’s atmosphere maintains a constant effective greenhouse-gas content and a constant, maximized, “saturated” greenhouse effect that cannot be increased further by CO2 emissions (or by any other emissions, for that matter). After calculating on the basis of the entire available annual global mean vertical profile of the NOAA/NCAR atmospheric reanalysis database, Miskolczi has found that the average greenhouse effect of the past 61 years (from 1948, the beginning of the archive, to 2008) is –
constant, not increasing;
equal to the unperturbed theoretical equilibrium value; and
equal (within 0.1 C°) to the global average value, drawn from the independent TIGR radiosonde archive.
During the 61-year period, in correspondence with the rise in CO2 concentration, the global average absolute humidity diminished about 1 per cent. This decrease in absolute humidity has exactly countered all of the warming effect that our CO2 emissions have had since 1948.
Similar computer simulations show that a hypothetical doubling of the carbon dioxide concentration in the air would cause a 3% decrease in the absolute humidity, keeping the total effective atmospheric greenhouse gas content constant, so that the greenhouse effect would merely continue to fluctuate around its equilibrium value. Therefore, a doubling of CO2 concentration would cause no net “global warming” at all.
Surface warming is possible only if the available energy increases. This may happen through changes in the activity of the Sun, or through variations of our planet’s orbital parameters, or through long-term fluctuations in the exchange of heat between the ocean and the atmosphere.
There are also some man-made sources. Air-pollution by aerosols (soot, black carbon, dust, smog etc.), and large-scale surface modifications according to urbanization and land-use change may—and probably do—alter the amount of absorbed and reflected shortwave energy, and can hence lead to change in the long-term energy balance.
These terms are all involved in the “available energy”. They can all modify the “effective temperature” of the Earth – i.e. the temperature of a planet with the Earth’s albedo (or reflectivity) at the Earth’s current distance from the Sun, without the presence of greenhouse gases in the air. The effective temperature is now 255 Kelvin, or –18 °C.
Miskolczi asserts that the surplus temperature from the greenhouse gases (about 33 C°, bringing global mean surface temperature up from –18 °C to 15 °C) is constant, maximized, and cannot be increased by our CO2 emissions, because it is the greenhouse effect’s theoretical equilibrium value.
It is possible that in the 21st century the effective temperature may change a little, just as it has changed in previous centuries. But the additional (greenhouse) temperature will be 33 C°, within a variation of about 0.1 C° of recent decades. Physically, it cannot increase (as the UN IPCC has predicted it will increase) to 35-38 C° to produce a 2-5 C° warming.
The conclusion is that, since the Earth’s temperature does not depend on our CO2 emissions in any way, trying to limit our emissions is bound to be entirely ineffective in protecting the climate from warming.” “CO2 CANNOT CAUSE ANY MORE “GLOBAL WARMING”“