Originally posted by AlbertaFarmer5
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Not only is the Charney sensitivity so broad that it couldn't possibly miss, it still missed. And the measure itself is meaningless.
With the benefit of 41 more years of empirical evidence, it now appears that the climate sensitivity to a doubling of CO2 is more likely half of the lowest estimate that Charney calculated. Making his high estimate only 600% too high. So based on my estimate of your precipitation for the year, even if you only get 5 inches, my forecast would still be bang on.
But what makes it meaningless, is that based on modern calculations of CO2 sequestration vs emissions, doubling of CO2 from pre industrial levels is looking to be unachievable. That and the law of diminishing returns applies to CO2, whereby the rate of increasing benefits to temperature decline at higher levels of CO2. So the sensitivity is not a fixed figure.
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