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You continually crow about some amazing victory over me a few years ago. "Careful there Max. Remember the last time you started down this "do the Math" rubbish. I did the math...and showed you to be an utter nong" http://tinyurl.com/stx7b74
Oh, so you're a climate scientist are you? You've done the math? Please, do tell! Except all you did was bring up the well known outer ranges of extreme possibility in climate sensitivity. You correctly stated the range was "1.5 to 4.5 degrees" per doubling of CO2. Wow, I must be utterly defeated! http://tinyurl.com/ulnfnlh
Yup, the sensitivity is important because the raw physics says the CO2 only warms the planet about 1.2 degrees. The rest comes down to various feedback loops. But while that 1.5 to 4.5 degrees sounds like a HUGE range, what did you purposely omit? Oh yeah, the probability! This isn't an even probability but a bell curve. The studies cluster in the middle which gives a high probability of 3 degrees and only extreme outside odds on anything lower than 2. http://tinyurl.com/jfcm5tv So based on that, Bill McKibben did the math on the highest probability and asked how much carbon we could continue to burn to stop at 2 degrees. Now the IPCC has changed it to 1.5 degrees because the climate seems MORE and MORE sensitive the more we study it.
The journal Nature has said:
"Here we present a new emergent constraint on ECS that yields a central estimate of 2.8 degrees Celsius with 66 per cent confidence limits (equivalent to the IPCC ‘likely’ range) of 2.2–3.4 degrees Celsius. Our approach is to focus on the variability of temperature about long-term historical warming, rather than on the warming trend itself."
January 2018 http://www.nature.com/articles/nature25450
You left with a final unjustified gloat http://tinyurl.com/un62q7o and that was it. The only REAL scientific thing you said was "1.5 to 4.5 degrees". The rest was long-winded waffle and now even Nature has undermined your weird claims.