Atmospheric CO2 Levels by Arctic Have Reached 400 Parts Per Million

May 31, 2012 · Print This Article

The atmosphere by the Arctic has hit a troublesome milestone: the concentration of CO2 has surpassed 400 parts per million. Stations across the region in Alaska, Greenland, Norway and Iceland have recorded the measurements that have surged since the winter and spring have brought a decline in CO2-absorbing vegetation. While the downswing in carbon absorption happens every year, this is the first moment in 800,000 years that the CO2 concentration anywhere in the world has been

400 ppm or above.

Before industrialization, global CO2 levels were about 280 ppm but in recent years global levels have reached as high as 395 ppm. The fact that any area of the globe has climbed above the 400 ppm mark concerns climate scientists that even with many countries rolling out carbon reduction measures, it’s not making a difference fast abundant.

Carnegie Institution ecologist Chris Field, a leader of the Intergovernmental […]

[Source] Cynthia


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