We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Methane emissions from terrestrial plants under aerobic conditions.
- Authors
Keppler, Frank; Hamilton, John T G; Brass, Marc; Röckmann, Thomas
- Abstract
Methane is an important greenhouse gas and its atmospheric concentration has almost tripled since pre-industrial times. It plays a central role in atmospheric oxidation chemistry and affects stratospheric ozone and water vapour levels. Most of the methane from natural sources in Earth's atmosphere is thought to originate from biological processes in anoxic environments. Here we demonstrate using stable carbon isotopes that methane is readily formed in situ in terrestrial plants under oxic conditions by a hitherto unrecognized process. Significant methane emissions from both intact plants and detached leaves were observed during incubation experiments in the laboratory and in the field. If our measurements are typical for short-lived biomass and scaled on a global basis, we estimate a methane source strength of 62-236 Tg yr(-1) for living plants and 1-7 Tg yr(-1) for plant litter (1 Tg = 10(12) g). We suggest that this newly identified source may have important implications for the global methane budget and may call for a reconsideration of the role of natural methane sources in past climate change.
- Publication
Nature, 2006, Vol 439, Issue 7073, p187
- ISSN
1476-4687
- Publication type
Journal Article
- DOI
10.1038/nature04420