Whoops! CO2 has almost nothing to do with global warming, discovers top US meteorologist

Climate change, he (Dr Roy Spencer) shows, is an almost entirely natural process on which human influence is negligible.

Of course, sceptics have been making this point for years, arguing that the quantities of carbon dioxide (CO2) produced by man are so tiny that even if they were to double there would still be no dangerous Anthropogenic Global Warming (AGW).

What they have been unable to answer convincingly until now, though, is the alarmists’ counterargument that CO2 emissions are exaggerated by “positive feedbacks”.

One type of positive feedback often cited by alarmists is cloud cover. When CO2 causes the world to warm, they argue, it reduces the number of clouds. Clouds are what help protect our planet from the burning heat of the sun, by reflecting solar radiation.But according to Spencer, these alarmists have got completely the wrong end of the stick. The mistake they have made is to confuse cause with effect. It’s not man-made global warming that is causing cloud cover to grow thinner, leading to a spiral of ever-rising temperatures. Rather, it’s natural variations in cloud cover that are helping to cause global warming.

Read the whole thing, it's well worth the time.