Global Warming Pushing Trees into Tundra

" The Arctic is on the move. The North Pole is in the same place, but Arctic conditions have begun to shift. A study of 30 years of satellite data confirms that the difference in temperatures between the seasons has diminished. Conditions now have shifted the equivalent of four or five degrees of latitude southward. At the same time, vegetation has moved north, colonizing the thawing permafros ...

Uploaded:2013/03/17 08:09:13 +0900 (JST)    Views:8  Comments:0  
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