Researchers work at the edge of the northern Alaska tundra

Please right click (PC) or control click (MAC) to download the fullsize version.

Tree rings contain exquisitely detailed records about past climates. Members of the Tree Ring Lab travel to many remote places to collect and study samples. Here, researchers work at the edge of the northern Alaska tundra. http://blogs.ei.columbia.edu/2012/06/14/lamont-doherty-earth-observatory-milestones-in-climate-studies/