Methane emissions from terrestrial plants under aerobic conditions
@article{Keppler2006MethaneEF, title={Methane emissions from terrestrial plants under aerobic conditions}, author={Frank Keppler and John T. G. Hamilton and Marc Bra{\ss} and Thomas R{\"o}ckmann}, journal={Nature}, year={2006}, volume={439}, pages={187-191} }
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…
888 Citations
Methane emission from terrestrial herbaceous plant
- Environmental Science2011 International Conference on Electrical and Control Engineering
- 2011
Methane(CH4) 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…
Three decades of global methane sources and sinks
- Environmental Science
- 2013
Methane is an important greenhouse gas, responsible for about 20% of the warming induced by long-lived greenhouse gases since pre-industrial times. By reacting with hydroxyl radicals, methane reduces…
Biogeosciences Non-microbial methane formation in oxic soils
- Environmental Science
- 2012
Methane plays an important role as a radiatively and chemically active gas in our atmosphere. Until recently, sources of atmospheric methane in the biosphere have been attributed to strictly…
Methane formation in aerobic environments
- Environmental Science
- 2009
Methane (CH_4), the second principal anthropogenic greenhouse gas after CO_2, is the most abundant reduced organic compound in the atmosphere and plays a central role in atmospheric chemistry.…
Stable isotopes provide revised global limits of aerobic methane emissions from plants
- Environmental Science
- 2006
Recently Keppler et al. (2006) discovered a surprising new source of methane – terrestrial plants under aerobic conditions, with an estimated global production of 62–236 Tg yr −1 by an unknown…
Global change: A green source of surprise
- Environmental ScienceNature
- 2006
living plants, as well as plant litter, emit methane to the atmosphere under oxic conditions, which could account for 10–30% of the annual methane source strength and has been overlooked in previous studies.
Aerobic methane production from organic matter
- Environmental Science
- 2005
Methane, together with H2O, CO2 and N2O, is an important greenhouse gas in the Earth’s atmosphere playing a key role in the radiative budget. It has been known for decades that the production of the…
Emissions of anaerobically produced methane by trees
- Environmental Science
- 2010
Recent studies indicate that plants may be a previously overlooked but significant source of atmospheric CH4, though there is considerable disagreement on the mechanism of production. Our work sought…
Elevated methane concentrations in trees of an upland forest
- Environmental Science
- 2012
There is intense debate about whether terrestrial vegetation contributes substantially to global methane emissions. Although trees may act as a conduit for methane release from soils to atmosphere,…
Methane emissions from boreal and tropical forest ecosystems derived from in-situ measurements
- Environmental Science
- 2006
Methane is a climatologically important greenhouse gas, which plays a key role in regulating water vapour in the stratosphere and hydroxyl radicals in the troposphere. Recent findings that vegetation…
References
SHOWING 1-10 OF 31 REFERENCES
New insight into the atmospheric chloromethane budget gained using stable carbon isotope ratios
- Environmental Science
- 2005
Abstract. Atmospheric chloromethane (CH3Cl) plays an important role in stratospheric ozone destruction, but many uncertainties still exist regarding strengths of both sources and sinks and the…
Carbon isotope anomaly in the major plant C-1 pool and its global biogeochemical implications
- Environmental Science, Geography
- 2004
Abstract. We report that the most abundant C1 units of terrestrial plants, the methoxyl groups of pectin and lignin, have a unique carbon isotope signature exceptionally depleted in 13C.…
Changing concentration, lifetime and climate forcing of atmospheric methane
- Environmental Science
- 1998
Previous studies on ice core analyses and recent in situ measurements have shown that CH 4 has increased from about 0.75–1.73 μmol/mol during the past 150 years. Here, we review sources and sink…
Concentration and 13C records of atmospheric methane in New Zealand and Antarctica: Evidence for changes in methane sources
- Environmental Science
- 1994
Measurements of 13C in atmospheric methane made at Baring Head, New Zealand (41°S), over the 4-year period, 1989–1993, display a persistent but highly variable seasonal cycle. Values for δ13C peak in…
Unexpected Changes to the Global Methane Budget over the Past 2000 Years
- Environmental ScienceScience
- 2005
It is suggested that both human activities and natural climate change influenced preindustrial biomass burning emissions and that these emissions have been previously understated in late preindustrial Holocene methane budget research.
The trend in atmospheric methane δ13C and implications for isotopic constraints on the global methane budget
- Environmental Science
- 2000
A recent paper by Tans [1997] has drawn attention to the isotopic disequilibrium that inevitably prevails when atmospheric methane is not in steady state with its sources, noting in particular the…
Atmospheric methane levels off: Temporary pause or a new steady‐state?
- Environmental Science
- 2003
The globally‐averaged atmospheric methane abundance determined from an extensive network of surface air sampling sites was constant at ∼1751 ppb from 1999 through 2002. Assuming that the methane…
Assessing Methane Emissions from Global Space-Borne Observations
- Environmental ScienceScience
- 2005
This work retrieved the global methane distribution by using spaceborne near-infrared absorption spectroscopy and observed unexpectedly high methane concentrations over tropical rainforests, revealing that emission inventories considerably underestimated methane sources in these regions during the time period of investigation.
Chloride Methylation by Plant Pectin: An Efficient Environmentally Significant Process
- Environmental ScienceScience
- 2003
Evidence is presented here that CH3Cl is produced in many terrestrial environments by a common mechanism, and this ubiquitous process acting in terrestrial ecosystems and during biomass burning could contribute the bulk of atmosphericCH3Cl.