Tree-rings prove climate was WARMER in Roman and Medieval times than it is now - and world has been cooling for 2,000 years
"Rings in fossilised pine trees have proven that the world was much warmer than previously thought - and the earth has been slowly COOLING for 2,000 years.
Measurements stretching back to 138BC prove that the Earth is slowly cooling due to changes in the distance between the Earth and the sun.
The finding may force scientists to rethink current theories of the impact of global warming.
It is the first time that researchers have been able to accurately measure trends in global temperature over the last two millennia.
Over that time, the world has been getting cooler - and previous estimates, used as the basis for current climate science, are wrong.
Their findings demonstrate that this trend involves a cooling of -0.3°C per millennium due to gradual changes to the position of the sun and an increase in the distance between the Earth and the sun.
‘This figure we calculated may not seem particularly significant,’ says Esper, ‘however, it is also not negligible when compared to global warming, which up to now has been less than 1°C.
'Our results suggest that the large-scale climate reconstruction shown by the Intergovernmental Panel on Climate Change (IPCC) likely underestimate this long-term cooling trend over the past few millennia.’
The finding was based on semi-fossilised tree rings found in Finnish lapland.
Professor Dr. Jan Esper's group at the Institute of Geography at JGU used tree-ring density measurements from sub-fossil pine trees originating from Finnish Lapland to produce a reconstruction reaching back to 138 BC.
In so doing, the researchers have been able for the first time to precisely demonstrate that the long-term trend over the past two millennia has been towards climatic cooling.
‘We found that previous estimates of historical temperatures during the Roman era and the Middle Ages were too low,’ says Esper. ‘Such findings are also significant with regard to climate policy, as they will influence the way today's climate changes are seen in context of historical warm periods.’
The annual growth rings in trees are the most important witnesses over the past 1,000 to 2,000 years as they indicate how warm and cool past climate conditions were."
Some Interesting Comments on the Article:
"Considering the Romans were succesfully growing grapes for wine production as far north as Northumberland, I would say it is clear that the climate was much warmer in the past. Indeed, I have read that we have not yet reached the temperatures prevalent between the last two ice ages. Global warming is a myth which politicians and doom-sayers have jumped on to help their own agendas."
"Oops. Guess this shoots a hole in "global warming". Which is why the green alliance changed the name from "global warming" to "climate change". It's a whole lot more vague and all-encompassing..."
"These facts don't fit the liberal belief of global warming. what will they do? They will ignore it."
"Everyone knows when it gets cooler it is weather. It is only when it gets warmer that it is climate."
"Oh Noooo! I thought the "science was settled". How can these "deniers" be taken seriously. I mean, come on, using dead preserved trees as data instead of a computer model. This must be wrong! Do they work for big oil? What will big Al do now - give back his awards? Not likely. Will any of the AGW zelots admit they may be wrong? Not likely!"
"Those lying trees are global warming deniers! I know because Al Gore and the other brainwashed liberals are all in consensus so it must be true!"
"Man made" global warming is a hoax & the reason for it is to brainwash people into paying a new global tax called 'carbon tax'. Al Gore has put himself in line to make billions from this hoax."