CO2 in glacial ice gives clues to historical atmosphere


  • Anonymous


Historical concentrations of carbon dioxide (CO2) are reported from the Greenland Ice Sheet Project 2 (GISP 2) in the August Geophysical Research Letters. These results reveal interesting data about atmospheric CO2 concentration before the industrial era. M. Wahlen, D. Allen, and B. Deck of the Scripps Institution of Oceanography and A. Herchenroder of the New York State Department of Health report their results from studying CO2 concentrations in the air bubbles trapped in various ice layers from the GISP 2 ice core. These data represent samples of the Earth's atmosphere from the years 1530 to 1940, including part of the “Little Ice Age” (Neoglacial), a term used for 16th and 18th century cold phases.