Tom Segalstad wrote this paper pointing out major holes in the CO2 Warming belief. You can scroll through the text in the embedded document above, or download the pdf by clicking on the Download button. Below is my excerpted synopsis with my bolds and added images.
1. Introduction
It has recently been created a belief among people that an apparent increase in atmospheric CO2 concentration is caused by anthropogenic burning of fossil carbon in petroleum, coal, and natural gas. The extra atmospheric CO has been claimed to cause global climatic change with a significant atmospheric temperature rise, of 1.5 to 4.5°C in the next decennium (Houghton et al., 1990). This postulate is here discussed and rejected on energetic and geochemical grounds.
2. Heat energy and temperatures
Our relatively high global atmospheric temperature near the surface of the Earth, with an average of 14 to 15°C, is caused by heat-absorbing gases in the atmosphere, mainly H2O vapor. Without the Earth’s atmosphere the surface temperature would be approximately -18°C.
All human activities have been claimed to contribute about 1.3% of this (approx. 2 W/m2 ), while a hypothetic doubling of the atmospheric CO concentration would contribute about 2.6% (approx. 4 W/m2 ) to the present “Greenhouse Effect”. 150 years-long time series of temperature measurements are covering too short time spans to be useful for climate prediction, in order to be used as “evidence” for anthropogenic heating (or cooling). The global mean temperature has risen and fallen several times over the last 400 years, with no evidence of anthropogenic causes, although strong explosive volcanic eruptions have caused periodically colder climates.
It should also be noted that clouds can reflect up to approx. 50 W/m2 and can absorb up to approx. 30 W/m2 of the solar radiation, making the Earth’s average “Greenhouse Effect” vary naturally within approx. 96 and 176 W/m2 . Hence the anticipated anthropogenic atmospheric CO heat absorption is much smaller than the natural variation of the Earth’s “Greenhouse Effect”.
The oceans act as a huge heat energy buffer; the global climate is primarily governed by the enormous amount of heat stored in the oceans (total mass approx. 1.4 x 10^24 g), rather than the minute amount of heat withheld in the heat-absorbing part of the atmosphere (total mass approx. 1.4 x 10^18 g), a mass difference of one million times. Most of the atmospheric heat absorption occurs in water vapor (total mass approx. 1.3 x 10^19 g), which is equivalent to a uniform layer of only 2.5 cm of liquid water covering the globe, with a residence time of about 9 days.
The total internal energy of the whole ocean is more than 1.6 x 10^27 Joules, about 2000 times larger than the total internal energy 9.4 x 10^23 Joules of the whole atmosphere. Furthermore the cryosphere (ice sheets, sea ice, permafrost, and glaciers; total mass of the continental ice is approx. 3.3 x 10^22 g) plays a central role in the Earth’sclimate as an effective heat sink for the atmosphere and oceans. With a large latent heat of melting on the order of 9.3 x 10^24 Joules, that hypothetic energy is equivalent tocooling the entire oceans by about 2°C (5.8 x 10^24 J/°C). For comparison, the energy needed to warm the entire atmosphere by 1°C is only 5.1 x 10^21 Joules.
Hence it will be impossible to melt the Earth’s ice caps and thereby increase the sea level just by increasing the heat energy of the atmosphere through a few percent by added heat absorption of anthropogenic CO2 in the lower atmosphere.
3. CO2 measurements in atmosphere and ice cores
Houghton et al. (1990) claim in their section 1.2.5 three evidences that the contemporary atmospheric CO2 increase is anthropogenic: First, CO2 measurements from ice cores show a 21% rise from 280 to 353 ppmv (parts per million by volume) since pre-industrial times; second, the atmospheric CO2 increase closely parallels (sic!) the accumulated emission trends from fossil fuel combustion and from land use changes, although the annual increase has been smaller each year than the fossil CO2 input [some 50% deviation]; third, the isotopic trends of C13 and C14 agree qualitatively (sic!) with those expected due to the CO2 emissions from fossil fuels and the biosphere.
Jaworowski et al. (1992 a) have presented a number of criticisms regarding the
methodology of atmospheric CO2 measurements, including spectroscopic instrumental
peak overlap errors (from N2O, CH4 , and CFCs in the air). They also pointed out that the CO2 measurements at current CO2 observatories use a procedure involving a subjective editing (Keeling et al., 1976) of measured data, only representative of a few tenths of percent of the total data. There are also fundamental problems connected with the use of stable carbon isotopes ( C13/ C14) in tree rings for model calculations of earlier atmospheres’ CO2 concentration, a method which now seems to have been abandoned.. The third evidence, based on carbon isotopes, will be discussed below in Section 5.
4. Chemical laws for distribution of CO2 in nature
Statistically it has been found that the atmospheric CO2 concentration rises after temperature rises (Kuo et al., 1990), and it has been suggested that the reason is that cold water dissolves more CO2 (e.g. Segalstad, 1990). Hence, if the water temperature increases, the water cannot keep as much CO2 in solution, resulting in CO2 degassing from the water to the atmosphere. According to Takahashi (1961) heating of sea water by 1°C will increase the partial pressure of atmospheric CO by 12.5 ppmv during
upwelling of deep water. For example 12°C warming of the Benguela Current should increase the atmospheric CO2 concentration by 150 ppmv.
From a geochemical consideration of sedimentary rocks deposited throughout the Earth’s history, and the chemical composition of the ocean and atmosphere, Holland (1984) showed that degassing from the Earth’s interior has given us chloride in the ocean; and nitrogen, CO2 , and noble gases in the atmosphere. Mineral equilibria have established concentrations of major cations and H in the ocean, and the CO2 concentration in the atmosphere, through different chemical buffer reactions. Biological
reactions have given us sulphate in the ocean and oxygen in the atmosphere.
Carbon dioxide is an equally important requisite for life on Earth as oxygen. Plants. need CO2 for their living (the photo synthesis), and humans and animals breath out CO2 from their respiration. In addition to this biogeochemical balance, there is also an important geochemical balance. CO2 in the atmosphere is in equilibrium with carbonic acid dissolved in the ocean, which in term is close to CaCO saturation and in equilibrium with carbonate shells of organisms and lime (calcium carbonate; limestone) in the ocean through the a series pf reactions.
If the temperature changes, the chemical equilibrium constant will change, and move the equilibrium to the left or right. The result is that the partial pressure of CO (g) will increase or decrease. The equilibrium will mainly be governed by Henry’s Law: the partial pressure of CO2 in the air will be proportional to the concentration of CO2 dissolved in water. The proportional constant is the Henry’s Law Constant, which is strongly temperature dependent, and lesser dependent on total pressure and salinity.
5. Carbon isotopes in atmospheric CO2
Houghton et al. (1990) assumed for the IPCC model 21% of our present-day atmospheric CO2 has been contributed from burning of fossil fuel. This has been made possible by CO2 having a “rough indication” (sic!) lifetime of 50 – 200 years. It is possible to test this assumption by inspecting the stable C13/ C12 isotope ratio (expressed as δ13Cpdb ) of atmospheric CO2 . It is important to note that this value is the net value of mixing all different CO2 components, and would show the results of all natural and non-natural (i.e. anthropogenic) processes involving CO2.
Segalstad (1992, 1993) has by isotope mass balance considerations calculated the atmospheric CO2 lifetime and the amount of fossil fuel CO2 in the atmosphere. The December 1988 atmospheric CO2 composition was computed for its 748 GT C total mass and δ13C = -7.807‰ for 3 components: (1) natural fraction remaining from the pre-industrial atmosphere; (2) cumulative fraction remaining from all annual fossil-fuel CO emissions (from production data); (3) carbon isotope mass-balanced natural fraction. The masses of the components were computed for different atmospheric lifetimes of CO2 .
The calculations show how the IPCC’s (Houghton et al., 1990) atmospheric CO2 lifetime of 50-200 years only accounts for half the mass of atmospheric CO2 . However, the unique result fits an atmospheric CO2 lifetime of -5 (5.4) years, in agreement with numerous C14 studies compiled by Sundquist (1985) and chemical kinetics (Stumm & Morgan, 1970). The mass of all past fossil-fuel and biogenic emissions remaining in the current atmosphere was in December 1988 calculated to be -30 GT C or less, i.e. a maximum -4%, corresponding to an atmospheric CO concentration of -14 ppmv. This small amount of anthropogenic atmospheric CO2 probably contributes less than half a Watt/m2 of the 146 W/m “Greenhouse Effect” of a cloudless atmosphere, contributing to less than half a degree C of radiative heating of the lower atmosphere.
The isotopic mass balance calculations show that at least 96% of the current atmospheric CO2 is isotopically indistinguishable from non-fossil-fuel sources, i.e. natural marine and juvenile sources from the Earth’s interior. Hence, for the atmospheric CO2 budget, marine equilibration and degassing, and juvenile degassing from e.g. volcanic sources, must be much more important, and burning of fossil-fuel and biogenic materials much less important, than assumed by the authors of the IPCC model
(Houghton et al., 1990)
6. Conclusions
Water vapor is the most important “greenhouse gas”. Man’s contribution to atmospheric CO2 from the burning of fossil fuels is small, maximum 4% found by carbon isotope mass balance calculations. The “Greenhouse Effect” of this contribution is small and well within natural climatic variability. The amount of fossil fuel carbon is minute compared to the total amount of carbon in the atmosphere, hydrosphere, and lithosphere. The atmospheric CO2 lifetime is about 5 years. The ocean will be able toabsorb the larger part of the CO2 that Man can produce through burning of fossil fuels. The IPCC CO2 global warming model is not supported by the scientific data. Based on geochemical knowledge there should be no reason to fear a climatic catastrophe because of Man’s release of the life-governing CO2 gas.
The global climate is primarily governed by the enormous heat energy stored in the oceans and the latent heat of melting of the ice caps, not by the small amount of heat that can be absorbed inatmospheric CO2 ; hence legislation of “CO2 taxes” to be paid by the public cannot influence on the sea level and the global climate.
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