Medieval warming WAS global – new science contradicts IPCC
'It was consensual' claims looking shaky
More peer-reviewed science contradicting the warming-alarmist "scientific consensus" was announced yesterday, as a new study shows that the well-documented warm period which took place in medieval times was not limited to Europe, or the northern hemisphere: it reached all the way to Antarctica.
The research involved the development of a new means of assessing past temperatures, to add to existing methods such as tree ring analysis and ice cores. In this study, scientists analysed samples of a crystal called ikaite, which forms in cold waters.
“Ikaite is an icy version of limestone,” explains earth-sciences prof Zunli Lu. “The crystals are only stable under cold conditions and actually melt at room temperature.”
Down in the Antarctic peninsula that isn't a problem, and Lu and his colleagues were able to take samples which had been present for hundreds of years and date their formation. The structure of Ikaite, it turns out, varies measurably depending on the temperature when it forms, allowing boffins to construct an accurate past temperature record.
A proper temperature record for Antarctica is particularly interesting, as it illuminates one of the main debates in global-warming/climate-change: namely, were the so-called Medieval Warm Period and Little Ice Age merely regional, or were they global events? The medieval warmup experienced by northern Europeans from say 900AD to 1250AD seems to have been at least as hot as anything seen in the industrial era. If it was worldwide in extent that would strongly suggest that global warming may just be something that happens from time to time, not something caused by miniscule concentrations of CO2 (the atmosphere is 0.04 per cent CO2 right now; this figure might climb to 0.07 per cent in the medium term).
The oft-mentioned "scientific consensus", based in large part on the work of famous climate-alarmist scientists Michael Mann and Phil Jones and reflected in the statements of the Intergovernmental Panel on Climate Change (IPCC), says that isn't true. The IPCC consensus is that the medieval warming – and the "Little Ice Age" which followed it – only happened in Europe and maybe some other northern areas. They were local events only, and globally the world was cooler than it is now. The temperature increase seen in the latter half of the 20th century is a new thing caused by humanity's carbon emissions.
Lu and his colleagues' new work, however, indicates that in fact the medieval warm period and little ice age were both felt right down to Antarctica.
“We showed that the Northern European climate events influenced climate conditions in Antarctica,” says the prof, who was at Oxford when most of the work was done but now has a position at Syracuse uni in the States. He and his colleagues write:
This ikaite record qualitatively supports that both the Medieval Warm Period and Little Ice Age extended to the Antarctic Peninsula.
In other words, global warming has already occurred in historical, pre-industrial times, and then gone away again. Lu et al's work is published in the peer-reviewed journal Earth and Planetary Science Letters. ®
Mr Parker - I just had to comment as I thought you might like to know that you calling Lewis an idiot has entirely convinced me of the superior merits of your argument! Please accept a well-deserved upvote from me.
i dont think there is doubt as to us having an effect on the climate, what is questionable is to what extent we do and how far that goes. after all, if we set off 2,000 nukes it would quite likely have an effect, so it is within our capability to effect it. we also dont know how the earth will adapt, if its adapting already and what would happen to the climate were humans not even here.
So all in all, we dont know for sure an awful lot really and what we do know isnt very consistant.
And calling people idiots is somewhat insulting and ironic given that you are on the opersite side of that same coin, People say man made global warming does happen, people say man made global warming doesnt happen, neither camp knows for sure and calling one group or another a bunch of idiots just highlights your own blinkered views on the matter.
Fact is this, lets not needlessly pollute the planet, lets not spend billions on trying to change something that might not need to change and ultimately costs us all a lot a lot, some of us so much that we cant afford to live!
No, lets instead spend billions working out what the hell is going on, and developing better sustainable energy systems like nuclear investment. If this carbon tax business went straight in to investment then that would be ok, but its not is it, companies are making a MINT out of this CO2 business much the same they did with the whole Y2K bug. Do you honestly think anyone is doing anything without any benifit to them selves?
all im saying is, lets be open minded about this, the real bad guys are those profiteering from it all, none of them can be trusted to say anything objectionable at all!
El Reg Scepticism
I believe this is an age thing, where the older you get the more you recognise the pattern of "we're all going to die unless we spend billions on x" as a repeating meme that in retrospect, just seems to fuck over the common man whilst making obscenely rich folk considerably richer.
Of course this doesnt preclude that Human activity really is causing global warming, but extraordinary claims require extraordinary proof and should be met with a healthy amount of sceptisism, If the current climate models are based on the assumption that prior warming was local to Europe yet the facts show this wasn't the case, that strikes me as newsworthy whatever your bias.