There are, dear Bunnies, more whackos under heaven and earth than even Eli could shake a stick at. While in the case of climate change denialism it often appears that these are from the out the window right, to be fair, some are on the left and others, well, they are simply commuters from Mars. This makes for very strange bedrooms. A prominent example from the left is Alexander Cockburn,
John Farley, has a Monthly Review article taking this apart. Rabett recommends. To give a taste (two tastes per customer), John's take on two incessant denial-o-whines are worth cutting out and putting in our wallets. That the European Warm Period is not there in the MBH reconstructions is a golden oldie. After pointing out that the warming was a) not synchronous globally and b) not global, at least synchronously the article gets to the root of the thing
Those who believe that the Medieval Warm Period is very important are making the assumption that there is only one factor determining the climate. If you make that assumption, and if the sole factor is burning of fossil fuels, then our understanding of global warming would be challenged, because of course massive burning of fossil fuels did not happen in medieval times. Some six decades ago, many scientists in fact assumed that only one factor influences climate, although they couldn't agree on what factor, and global climate change was thus not understood. Today we know better: a number of factors influence global climate, including the intensity of the sun, aerosols, the greenhouse effect, Milankovich cycles (changes in the Earth's orbital motion), volcanic eruptions, and other factors.Second, Eli understands that several WUWT readers have had Kenneth Trenberth's comment
The fact is that we can't account for the lack of warming at the moment and it is a travesty that we can't.tattooed on the same parts of their body as the Christmas fairy tried to light. Farley brings the context (Eli knows that's unfair)
What climate scientists do not fully understand are the short-term fluctuations above and below the long-term trend. As part of those fluctuations, energy is transferred between different parts of the earth's climate system: glaciers, polar ice, the deep ocean, etc. Trenberth asks why the January 2008 temperature was unusually low. "Was it because a lot of heat went into melting Arctic sea ice or parts of Greenland and Antarctica, and other glaciers?" Currently we just can't say.Oh yeah, Cockburn doesn't understand the second law of thermodynamics. John does.