Evidence of Global Warming That The Trees Remember

Exposed tree stumps, that were once frozen in time under the glaciers of Canada's Garibaldi Provincial Park, are giving geologists new insight into the accelerated rates to which they are melting.
"The stumps were in very good condition sometimes with bark preserved," said Geologist Johannes Koch from Simon Fraser University in Burnaby, British Columbia.
To find out how long the tree stumps have been living in ice, Koch radiocarbon-dated the wood. He discovered that the trees had been buried under tens to hundreds meters if ice for 7000 years! This realization shows that this is the first time these trees have been exposed in that amount of time. There have been many advances and retreats of the glaciers over the past 7000 yrs but none so far as expose these trees.
"It seems like an unprecedented change in a short amount of time," Koch said. "From this work and many other studies looking at forcings of the climate system, one has to turn away from natural ones alone to explain this dramatic change of the past 150 years." Source.