:roll:
Why do you imagine this is impossible? Pressure, wind, composition, humidity temperature and more can all be controlled in a lab. E.g. CERN's CLOUD experiment is measuring the effects of cosmic rays on clouds and aerosols in the atmosphere, right here on the ground:
That's nice. But nothing you're writing refutes the fact that feedbacks
and tipping points exist. Nor is "runaway warming" the only danger.
Yeah, no. There's massive amounts of carbon locked up in permafrost. Studies show up to 1.5
trillion tons of carbon is stored in permafrost. Obviously it won't release all of that in a matter of weeks, but it is not mere speculation that melting permafrost could hit a tipping point. And even without tipping points, massive releases of carbon and methane will still increase temperatures.
People may say that, but when it comes to proof, we ought to pay attention to scientists -- who do this crazy thing called
make measurements and observations before making those kinds of claims. E.g. we actually monitor CO2 releases by permafrost; so when we see that parts of Siberia and Alaska are warming, and that the permafrost in those regions are releasing more CO2 than they trap? Yeah,
that's a feedback effect.
We also have
actual measurements of water vapor, plankton growth rates, ice melt rates, melting snow cover extent, comparisons of precipitation....
:roll:
Please, spare us your made-up numbers. Methane is not just a known GHG, it is one of the most potent GHGs, trapping at least
28 times more heat than CO2 at equivalent masses. There is also significantly more CO2 in the atmosphere than methane (about 200x more). Even though it has a much shorter lifespan in the atmosphere than CO2 (~9 years vs ~100 years), it is still
highly rational to be concerned about potentially massive releases of methane from permafrost.
sigh
Again, runaway temperatures is a danger -- but not the only one. Even without that scenario,
temperatures are still rising at an unprecedented rate, and will cause significant damage.
Oh, really? Will Dumbledore wave a magic wand and fix everything?
Yes, I'm sure the reason why temperatures have increased roughly 0.8C since 1880 is because
the mass of Earth's atmosphere changed all on its own.
Please, spare us this nonsense. GHGs are real. We're dumping massive amounts of GHGs into the atmosphere. This in turn releases GHGs stored by various natural carbon sinks, as well, as makes other changes which alter the planet's energy balance. All the evidence -- land measurements, ocean measurements, satellite measurements, CO2 measurements, sea levels, ice mass and more -- all point in the same direction, which is higher temperatures. And yes, this manifests with record-shattering heat waves around the globe, like we've seen over the past few weeks, and which bumped July 2018 to the 5th hottest on record.
