Bones beat trees as markers for environmental change

Friday, August 15, 2008 - 08:49 in Biology & Nature

To track atmospheric change caused by human activity, researchers have long studied a variety of materials, from tree rings to air trapped in glacial ice. A problem has been 'noise' - natural variability caused by sampling and random events that affect atmospheric chemistry. Noise can make it hard to tease out trends from the data...

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