Water drives the deuterium content of the methane emitted from plants

Vigano, I.; Holzinger, Rupert; Keppler, Frank; Greule, Markus; Brand, Willi A.; Geilmann, Heike; Weelden, Huib van; Röckmann, T.

doi:10.1016/j.gca.2010.03.030

Cited by 22 publications

(25 citation statements)

References 39 publications

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“…CH 4 from gas hydrates is depleted in 13 C but enriched in D (δ 13 C∼ − 60‰, δD∼ − 200‰). The isotopic composition of the recently discovered source of CH 4 from organic matter (Keppler et al, 2006;McLeod et al, 2008;Vigano et al, 2008Vigano et al, , 2009) is actually similar to the values found for microbial formation (Vigano et al, 2009(Vigano et al, , 2010, although the process itself is abiotic. Thus, isotope analysis yields independent constraints on the relative source contributions to the global methane budget, not only for the present but also for the past atmosphere (Ferretti et al, 2005;Sowers et al, 2005;Schaefer et al, 2006Schaefer et al, , 2006Fischer et al, 2008;Mischler et al, 2009;Bock et al, 2010b).…”

Section: Introductionsupporting

confidence: 66%

Continuous-flow isotope ratio mass spectrometry method for carbon and hydrogen isotope measurements on atmospheric methane

Braß

Röckmann

2010

Atmos. Meas. Tech.

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Abstract. We describe a continuous-flow isotope ratio mass spectrometry (CF-IRMS) technique for high-precision δD and δ 13 C measurements of atmospheric methane on 40 mL air samples. CH 4 is separated from other air components by utilizing purely physical processes based on temperature, time and mechanical valve switching. Chemical agents are avoided. Trace amounts of interfering compounds can be separated by gas chromatography after pre-concentration of the CH 4 sample. The purified sample is then either combusted to CO 2 or pyrolyzed to H 2 for stable isotope measurement. Apart from connecting samples and refilling liquid nitrogen as coolant the system is fully automated and allows an unobserved, continuous analysis of samples. The analytical system has been used for analysis of air samples with CH 4 mixing ratios between ∼100 and ∼10 000 ppb, for higher mixing ratios samples usually have to be diluted.

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Section: Introductionsupporting

confidence: 66%

Continuous-flow isotope ratio mass spectrometry method for carbon and hydrogen isotope measurements on atmospheric methane

Braß

Röckmann

2010

Atmos. Meas. Tech.

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“…Employing 13 C positionally labelled methionine, Lenhart et al (2014) verified the sulphur-bound methyl group (eSeCH 3 ) of methionine as a potential carbon precursor of plant-derived CH 4 . The number of the potential source substrates for CH 4 may be much greater than anticipated (Vigano et al, 2010).…”

Section: Plantsmentioning

confidence: 88%

A novel pathway of direct methane production and emission by eukaryotes including plants, animals and fungi: An overview

Liu

Chen

Zhu

et al. 2015

Atmospheric Environment

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“…Mixing ratio and isotopic composition of the air samples were determined on a high-precision continuous flow isotope ratio mass spectrometry system (Brass and Röckmann, 2010) that has been used in various studies to determine the isotopic composition of CH 4 (Keppler et al, 2006(Keppler et al, , 2008Tarasova et al, 2006;Vigano et al, 2009Vigano et al, , 2010. The samples are analyzed automatically relative to a laboratory standard air cylinder that is usually measured after each two samples.…”

Section: Methodsmentioning

confidence: 99%

The isotopic composition of methane in the stratosphere: high-altitude balloon sample measurements

et al. 2011

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Abstract.The isotopic composition of stratospheric methane has been determined on a large suite of air samples from stratospheric balloon flights covering subtropical to polar latitudes and a time period of 16 yr. 154 samples were analyzed for δ 13 C and 119 samples for δD, increasing the previously published dataset for balloon borne samples by an order of magnitude, and more than doubling the total available stratospheric data (including aircraft samples) published to date. The samples also cover a large range in mixing ratio from tropospheric values near 1800 ppb down to only 250 ppb, and the strong isotope fractionation processes accordingly increase the isotopic composition up to δ 13 C = −14 ‰ and δD = +190 ‰, the largest enrichments observed for atmospheric CH 4 so far. When analyzing and comparing kinetic isotope effects (KIEs) derived from single balloon profiles, it is necessary to take into account the residence time in the stratosphere in combination with the observed mixing ratio and isotope trends in the troposphere, and the range of isotope values covered by the individual profile. The isotopic composition of CH 4 in the stratosphere is affected by both chemical and dynamical processes. This severely hampers interpretation of the data in terms of the relative fractions of the three important sink mechanisms (reaction with OH, O( 1 D) and Cl). It is shown that a formal sink partitioning using the measured data severely underestimates the fraction removed by OH, which is likely due to the insensitivity of the measurements to the kinetic fractionation in the lower stratosphere. Full quantitative interpretation of the CH 4 isotope data in terms of the three sink reactions requires a global model.

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Water drives the deuterium content of the methane emitted from plants

Cited by 22 publications

References 39 publications

Continuous-flow isotope ratio mass spectrometry method for carbon and hydrogen isotope measurements on atmospheric methane

Continuous-flow isotope ratio mass spectrometry method for carbon and hydrogen isotope measurements on atmospheric methane

A novel pathway of direct methane production and emission by eukaryotes including plants, animals and fungi: An overview

The isotopic composition of methane in the stratosphere: high-altitude balloon sample measurements

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