July 12, 2012
Tree-rings prove climate was WARMER in Roman and Medieval times than it is now - and world has been cooling for 2,000 years (ROB WAUGH, 11 July 2012, Daily Mail)
Measurements stretching back to 138BC prove that the Earth is slowly cooling due to changes in the distance between the Earth and the sun.["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."]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.
Posted by Orrin Judd at July 12, 2012 5:45 AM