Skeptical Climate Statistics professor Dr. Caleb Rossiter: ‘Being conflated with critics of evolution and vaccines got under my skin’
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Rossiter: 'There is absolutely not a scientific consensus that human-caused climate change is "a serious threat.” - 'I have taught math models and statistics for a decade at American University.'
'In earth’s poorly understood and complex, interactive climate system, many intervening variables are impossible to control for accurately. As a result, predictions about climate changes are extremely hard to test. Climate claims at present are fundamentally speculative, rather than, as in the other examples of science cited in your article, definitive...The UN report provides little to show that droughts, hurricanes, and sea height have increased due to, or even with the warming.'
Flashback: Politically Left Scientist Dissents – Calls President Obama ‘delusional’ on global warming - Rossiter on his conversion to a climate skeptic: 'You are very isolated on the Democratic Party on the left — one is, I am — for having this conclusion of analysis...I would say since 2004, I’ve been very lonely. I’ve been lonely working on the Hill for the Democratic Party.'
The impact of additional CO2 on temperature levels off, rather than keeps increasing. This is because the CO2 molecules, which happen to oscillate at the same frequencies as infrared leaving the atmosphere, get “filled” with the resulting heat-trapping interactions, and absorb less and less of the escaping infrared over time.
But the justification for this conclusion comes almost entirely from the fact that a few modelers, using hundreds of parameters for unknown and currently unknowable interactions, can get a decent back-fit on previous global mean temperatures when they assume a certain sensitivity of temperature to CO2 and methane levels.