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There are huge natural sources and sinks for CO2. Fossil fuels are small compared to these. This dilutes isotope 14 as the natural sources are all isotope 12. Anthropogenic CO2 adds to the natural cycle.
Not that I believe in global warming...
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Jquip says:
Et tu, Bomb test?
Observation trumps theory every time. So it’s not a question as to whether the decay curve for C14 as measured is in error. But neither is it strictly necessary that it’s invariant; though I hardly expect it to vary much.
But the Bern model is a bit of a problem. Admittedly I don’t know much about it, but a quick double check seems to reconfirm that Bern is not for decay as such, but a full carbon cycle. eg. It is using the ocean as part of a buffer to its impulse. So the impulse isn’t really an impulse, but half an impulse with the rest as introduced over time as the impulse decays. Which would, with some assumptions, match the Bern curve. Though as it seems to be widely considered to be a ‘pure’ sink model rather than a source/sink model this may just be a common misunderstading. Or it may just be a misunderstanding on my
“However, the bomb-test curve does show that just about all CO2 molecules conveniently marked with one or two extra neutrons in their nuclei will nearly all have come out of the atmosphere within 50 years.”
“Why should not the other isotopes of CO2 disappear just as rapidly?”
This is an ABSOLUTE GEM of an interpretation, Lord Monckton. Absolutely beautiful. Not only for asking the right question, but by catching them at their own game.
How so?
This is their OWN methodology, stuff the greens use on tagging animals to check out populations. The tree huggers do that all the time.
And now, when someone points out TAGGED molecules, they throw up their hands and say, “Wait! Wait! Wait! Wait! Wait! Wait! You can’t use our own methods against us! That’s not fair!”
This is 100% the right approach on this. 12CO2 molecules out of industry don’t act any different – INDIVIDUALLY – than 14CO2 does.
I also applaud you going through all that math and such, and giving them full voice of their take on it. VERY commendable! But it DOES all come down to:
“Why should not the other isotopes of CO2 disappear just as rapidly?”
BUSTED! ! ! ! !