News From the Field
New Proxy Reveals How Humans Have Disrupted the Nitrogen Cycle
June 4, 2009
Researchers from Brown University and the University of Washington have found a new proxy to measure the impact of fossil fuel emissions on the global nitrogen cycle. The scientists use nitrogen isotopes found in a Greenland ice core to link nitrates to the rise in nitric oxides since the industrial period. The research also shows the greatest change in the isotope ratios occurred between 1950 and 1980, following a rapid increase in fossil fuel burning. Results are published in Science.
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