No Special Greenhouse Gas Effect on Earth, Venus or Mars
Australian Physical Chemist uses standard science to test whether ‘greenhouse gases’ – key to the theory behind man-made global warming – really can have any greenhouse effect on other planets.
Dr Peter J Carson (University of Adelaide) shows that careful comparison of the different concentrations of atmospheric carbon dioxide (CO2) on Earth, Venus and Mars determines that any supposed ‘greenhouse gas effect’ has no relation to the amount of atmospheric CO2.
Dr Carson’s analysis, set out below and linked here, is a compelling debunk of the claims that adding more CO2 into the atmosphere will alter the temperature of a planet’s surface. In effect, Carson shows that the theory of anthropogenic global warming (AGW) is false.
Venus, Earth and Mars …. Game, Set and Match! Greenhouse Effects on the Rocky Planets
[As the innermost planet Mercury has no atmosphere and therefore no greenhouse, only the other three rocky planets Venus, Earth and Mars are appropriate here.]
Anthropogenic Global Warming Theory (AGW):
Proposes that the only greenhouse gases are the specialgreenhouse gases (GG) – those that can capture infrared radiation (IR) directly, such as carbon dioxide and methane. A planet’s observed surface temperature (OBS) is greater than its calculated StefanBoltzmann temperature (SB) – ie heat from the Sun – because ‘greenhouse gases’ are alleged to trap some of the planet’s radiated heat increasing the observed temperature by
∆ OBS = SB + ∆ (1)
AGW assumes that ∆ is the greenhouse effect, G, and that it increases with CO2
ie G = f( PCO2)
but just what particular function that might be depends on which AGW expert is using the data!
There are many shown in the IPCC reports. Prominent global warming alarmist, Al Gore, seems to favour linear,
G ∝ PCO2.
Although Mars has only a small atmosphere, it is 95{154653b9ea5f83bbbf00f55de12e21cba2da5b4b158a426ee0e27ae0c1b44117} CO2 – similar to Venus’ 96{154653b9ea5f83bbbf00f55de12e21cba2da5b4b158a426ee0e27ae0c1b44117} the product (Pressure* {154653b9ea5f83bbbf00f55de12e21cba2da5b4b158a426ee0e27ae0c1b44117}CO2) is 14x greater than Earth’s. According to AGW, Mars should have a larger greenhouse than Earth; instead it’s much less!
No special greenhouse gases: (see Chapter 1B: Click Greenhouse re-examined to view 3 page (.pdf)):
A planet’s greenhouse effect, G is proportional to its pressure, and (Chapter 2) a planet’s surface also receives extra heat from its Interior, (which in turn is the sum of the tidal heat, Interior radioactive decay heat and heat left over from the planet’s formation) producing the larger observed temperature, OBS.
OBS = (SB + IntT) + G (2)
where OBS ≡ observed temperature of the planet’s surface,
SB ≡ calculated Stefan-Boltzmann temperature
IntT ≡ Interior Temperature, the contribution of Temperature coming from the planet’s Interior heat, (in turn, IntT = tidal + radio-active + residual).
From Chapter 1B, the greenhouse trapped heat is proportional to
*** the atmosphere’s density (ie P) – or more accurately than needed here, to the product C*P where C is atmosphere’s specific heat,
*** and to each planet’s surface temperature so that,
G = k*P*(SB + IntT) (k is the same for all the rocky planets).
Then, OBS = (SB + IntT)*(1+k*P) (3)
Testing AGW vs non-AGW:
These two propositions can be tested with the rocky planet data (Table 1).
AGW proposes that ∆=OBS-SB (Row 6) is the greenhouse effect, G and therefore ∆/PCO2 is constant. (Row 7):
Clearly, AGW is a long way wrong.
No special greenhouse gases:
Row 10 is better, even though it is only the greenhouse effect, ∆ ∝ P total being considered. It is assumed in this row that IntT = 0, demonstrating the values depart when IntT becomes relatively more significant, eg Mars where G ≈ 0.
However, we can do much better than that! Row 11 is eq 3 where the planet’s interior heat (IntT) supplements the greenhouse effect, ie ∆ = G + IntT. The greenhouse proportionality is the same for each planet, validating this proposal.
…………………………………………………………………………………..
The calculations involved.
Justification:
- They are similar sized planets with similarly active interiors.
- As they were formed at much the same time, 4·6 billion years ago, their residual heats and radio-active decays are similar.
- The effect of tidal heating is similar. Earth has a Moon, the Moon’s tidal effect being approximately twice that of the Sun’s, which somewhat balances Venus’ closeness to the Sun. (Anyway, tidal heating is small. Mercury has the largest tidal heating of the rocky planets but ∆=OBS-SB including tidal, residual heats and radio-active heat, still only totals about 3K.)
Now we have 2 equations with only 2 unknowns, IntT & k.
This returns IntTV = IntTE = 27·6 – falling well within the limits from Fig 1of 33K > IntTE > 12 K – and k=0·01928:
k can then be used for Mars to give IntTM = 6·0 returning a value for G ≈ 0, matching expectations for a planet with such low pressure.
The greenhouse effects (G) constant for each planet are:
Venus: 475 K
Earth: 5.5 K
Mars: 0.02 K
However, Figure 1 shows IntTE is variable – when measured over thousands of years.
[AGW does not allow for a significant IntT but Row 7 shows this is wildly inaccurate. Even if one includes IntT (Row 9) producing (Row 8), the end result is still wrong. Even if the proposed functional relationship between G & PCO2 is non-linear, Mars cannot have G intermediate between Venus and Earth as expected by AGW.]
CONCLUSIONS:
1. The greenhouse effect (G) is proportional to an atmosphere’s total pressure.
2. G for each planet is therefore constant.
3. Vostok shows a planet’s geologically released internal heat, IntT varies with time.
4. G is unrelated to an atmosphere’s carbon dioxide density. AGW is wrong.
*****
Chapter 1B is validated by #1 & #2 and Chapter 2 by #3.
*****
i American Chemical Society: https://www.acs.org/content/acs/en/climatescience/energybalance/planetarytemperatures.html
Lyatt Jaeglé: Similar data are provided in website http://www.atmos.washington.edu/2002Q4/211/notes_greenhouse.html
Read more at pjcarson2015.wordpress.com
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