Loss of sea ice in the Arctic.

@article{Perovich2009LossOS,
  title={Loss of sea ice in the Arctic.},
  author={Donald K. Perovich and Jacqueline Richter-Menge},
  journal={Annual review of marine science},
  year={2009},
  volume={1},
  pages={
          417-41
        }
}
The Arctic sea ice cover is in decline. The areal extent of the ice cover has been decreasing for the past few decades at an accelerating rate. Evidence also points to a decrease in sea ice thickness and a reduction in the amount of thicker perennial sea ice. A general global warming trend has made the ice cover more vulnerable to natural fluctuations in atmospheric and oceanic forcing. The observed reduction in Arctic sea ice is a consequence of both thermodynamic and dynamic processes… 
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