Fossil fuels did not cause the CO2 rise. PERIOD.
Here is why we know, without wiggle room:
Every carbon source has an isotope fingerprint.
Fossil carbon: -28‰.
Ocean outgassing: -8‰. Standard values. Undisputed. In every carbon-cycle textbook. Used by the IPCC itself.
The Keeling plot reads the fingerprint of whatever is actually being added to the atmosphere. Pure mass balance. No models. No parameterizations. No assumptions.
Scripps measured it at four stations, Barrow to the South Pole, from 1978 to now.
Answer: -13.2‰.
Not -28.
Not close to -28.
Not fossil fuel.
Caribbean sclerosponges preserve that same fingerprint back to 1500 AD.
Same value.
About -13‰.
For five centuries.
Across those five centuries fossil emissions rose from essentially zero to roughly 10 billion tons of carbon per year. A ten thousand fold increase.
The isotope needle did not move.
If fossil combustion were driving atmospheric CO2, that needle would have swung hard toward -28‰.
It did not budge.
The two endmember mixing equation is arithmetic a middle schooler can do. Plug in -13.2 for the observed signature, -28 for fossil, -8 for ocean outgassing.
The fossil share of the net atmospheric addition cannot exceed 26%.
Then apply the five century constancy. In 1500 AD fossil emissions were essentially zero, so the observed -13‰ signature had to be the natural signature itself. That fixes the natural mix at -13‰. Plug that in with the modern -13.2‰.
Fossil share of the net addition: 1.3%.
Within noise of zero.
To escape the conclusion you must reject one of:
1. Elementary algebra applied to mass conservation
2. The isotope endmember values the entire carbon-cycle literature has used for sixty years
3. The Scripps and sclerosponge datasets the IPCC itself relies on
Nobody rejects any of them.
The rise in atmospheric CO2 is not the residue of your gas tank.
The isotopes rule it out.
Full stop.
🔗
Jonathan Cohler (@cohler)
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Jonathan Cohler (@cohler):
IPCC HUMAN CO₂ ATTRIBUTION PROVEN MATHEMATICALLY IMPOSSIBLE
Fossil carbon contributes ≈ZERO to the observed rise in atmospheric CO₂.
The Keeling intercept has remained locked at δ¹³C_I ≈ −13‰ for five full centuries, while fossil emissions rose from essentially nothing to ~10 GtC yr⁻¹.
A large fossil fraction would have dragged the intercept toward −28‰. It didn't budge.
The only value consistent with a fixed intercept is
fossil fraction f ≈ 0.
IPCC’s own methods, own isotopic standards, and own data force the conclusion:
Human fossil emissions are not the cause of the rise in atmospheric CO₂. PERIOD.
The claim is mathematically dead.
Full mathematical proof:
http://bit.ly/NoHumanCO2➖➖➖