Quote:Scientific evidence for the theory that human emissions of carbon dioxide are the main cause of global warming needs to be:
Empirical - That which we can see, hear, record, or write down. A measurement of some sort. An observation of the natural world.
Related to CAUSE and EFFECT. That means evidence that shows that our extra carbon caused most of the recent warming. Not just evidence that the world has got warmer (which could be due to some other reason).
Evidence that shows carbon has a major role, that doubling the level of atmospheric carbon dioxide would cause, say, 2 – 10 degrees of warming. If doubling carbon only causes 0.5 degrees of warming, who cares?
http://joannenova.com.au/2010/01/is-there-any-evidence/OK, she says “our carbon” so makes it a bit easier.
Measurements of IR, can be written down, recorded in computer storage etc.
We see CO2 and the other GHGs DO block IR.
If she wanted to find out the sensitivity of climate to CO2 she could have found this CSIRO page on it, or the NASA one or the NOAA one or the MetOffice one or. . . .
https://www.environment.gov.au/system/files/resources/d3a8654f-e1f1-4d3f-85a1-4c...AGW denialism is just sad and silly these days.
None sadder than the cretins who think we are in an Ice Age when 2016 was the hottest recorded year and 2017 is nearly as hot. Frootloop territory.