Affiliation:
1. Department of Earth System Science, University of California, Irvine, CA 92697–3100, USA.
Abstract
Lingering Atmospheric Perturbations
Nitrous oxide and methane are chemically active greenhouse gases whose atmospheric abundances are greatly influenced by anthropogenic emissions.
Prather and Hsu
(p.
952
) used an atmospheric chemistry model to show how nitrous oxide emissions lower the concentration of tropospheric methane through a chain of chemical reactions that include stratospheric ozone depletion, changes in solar ultraviolet radiation fluxes, altered fluxes of ozone transport from the stratosphere to the troposphere, and increases in the amount of tropospheric hydroxyl radicals. This mechanism acts on a 108-year-long time scale—10 times longer than the atmospheric residence time of methane.
Publisher
American Association for the Advancement of Science (AAAS)
Reference21 articles.
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