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Queen's scientists on international team discover 'ecologically unique' changes in Arctic lake
Date:10/20/2009

in the tilt of the Earth's axis which, under natural conditions, would lead to climatic cooling," notes the University of Colorado's Dr. Axford.

Such long lake records are extremely rare in glacial regions because the massive ice sheets during past ice ages typically scraped and scoured the underlying bedrock and removed previous sediment records, much like a huge bulldozer. The Baffin Island lake was spared this scouring due to the presence of what is known as cold-based ice, which is non-erosive and acts to preserve landscape features such as lakes and the sediments contained within their basins.

"Our results show that the 'human footprint' is overpowering long-standing natural processes, even in remote Arctic regions," says Dr. Smol, winner of the 2004 NSERC Herzberg Gold Medal as Canada's top scientist. "This historical record shows that we are dramatically affecting the ecosystems on which we depend. We have started uncontrolled experiments on this planet, and we have entered unchartered territory. The situation is far worse than we thought and this is only the beginning."


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Contact: Nancy Dorrance
nancy.dorrance@queensu.ca
613-533-2869
Queen's University
Source:Eurekalert  

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Queen's scientists on international team discover 'ecologically unique' changes in Arctic lake
Queen's scientists on international team discover 'ecologically unique' changes in Arctic lake
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