Investigation of cattle methane production and emission over a 24‐hour period using measurements of δ13C and δD of emitted CH4 and rumen water

Bilek, R. S.; Tyler, S. C.; Kurihara, Mitsunori; Yagi, Kazuyuki

doi:10.1029/2001jd900177

Cited by 24 publications

(26 citation statements)

References 38 publications

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“…Biogenic natural gas (CH 4 ) tends to be depleted by only ϳ160‰ relative to source H 2 O (Schoell, 1980), whereas CH 4 produced in wetlands and ruminants tends to be depleted by 300 -400‰ relative to source H 2 O (Sugimoto and Wada, 1995;Waldron et al, 1999;Bilek et al, 2001;Chidthaisong et al, 2002). A depletion of 160‰ falls within the range observed in this study (Figs.…”

Section: Environmental Relevancesupporting

confidence: 63%

Carbon and hydrogen isotope fractionation by moderately thermophilic methanogens 1 1Associate editor: N. E. Ostrom

Valentine

Chidthaisong²,

Rice

et al. 2004

Geochimica et Cosmochimica Acta

301

335

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Section: Environmental Relevancesupporting

confidence: 63%

Carbon and hydrogen isotope fractionation by moderately thermophilic methanogens 1 1Associate editor: N. E. Ostrom

Valentine

Chidthaisong²,

Rice

et al. 2004

Geochimica et Cosmochimica Acta

301

335

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“…Methane produced by ruminants is isotopically dependent on the ratio of C 3 and C 4 in their diet as shown by Rust [1981], Metges et al [1990], Levin et al [1993], Schulze et al [1998] and Bilek et al [2001] (Table 2). We omit data by Metges et al [1990], in which δ 13 CH 4 is calculated from δ 13 CO 2 , because they are inconsistent with all other data.…”

Section: The δ13ch4 Of Natural Methane Sourcesmentioning

confidence: 99%

“… a Sources are the following: R, Rust [1981]; M, Metges et al [1990]; L, Levin et al [1993]; S, Schulze et al [1998]; and B, Bilek et al [2001]. Range is ± 1 standard deviation. …”

Section: The δ13ch4 Of Natural Methane Sourcesmentioning

confidence: 99%

Potential glacial‐interglacial changes in stable carbon isotope ratios of methane sources and sink fractionation

Schaefer¹,

Whiticar

2008

Global Biogeochemical Cycles

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[1] Past atmospheric methane emissions can be constrained by d 13 CH 4 records from ice cores only if changes to source d 13 CH 4 signatures and sink isotope effects with varying environmental and climatic conditions are accurately known. We present reconstructions of such changes based on paleodata and recent systems observations. The results are specific for budget scenarios and are reported here for two alternative types of budgets, one including aerobic methane emissions (AMP) from plants and the other type without AMP. Shifting atmospheric d 13 CO 2 potentially led to 13 CH 4 enrichment by 0.8% in the preindustrial Holocene (PIH) ($150-11,000 years (a) B.P.) and $0.3-0.6% at the Last Glacial Maximum (LGM) ($18,000 a B.P.) relative to today. Differing distribution of C 3 and C 4 plant precursor material may account for 13 CH 4 enrichment of $0.4% (PIH) and $0.6-1.1% (LGM). Temperature-dependent fractionation and varying methanogenic pathways in wetlands may lead to atmospheric 13 CH 4 depletion by $0.1-1.2%. Sink fractionation today (7.4%) is higher than during the PIH ($7.0%) and the LGM ($5.7%). The cumulative effect of all processes is $0.8% 13 CH 4 enrichment in the PIH and $1-1.2% 13 CH 4 depletion at the LGM. Budget reconstructions will be inaccurate if these changes are not included.Citation: Schaefer, H., and M. J. Whiticar (2008), Potential glacial-interglacial changes in stable carbon isotope ratios of methane sources and sink fractionation, Global Biogeochem. Cycles, 22, GB1001,

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“…a 12‰ difference in d 13 CH 4 for C 3 versus C 4 , as shown by Rust (1981), Metges et al (1990), Ehleringer & Monson (1993), Levin et al (1993), Schulze et al (1998) and Bilek et al (2001). The proportion of C 3 versus C 4 plants will also impact the d 13 CH 4 emitted from wildfires.…”

Section: Source Components Of Pih Yd-pb and Lgm Global Methane Invenmentioning

confidence: 99%

Constraining past global tropospheric methane budgets with carbon and hydrogen isotope ratios in ice

Whiticar

Schaefer

2007

Phil. Trans. R. Soc. A.

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Upon closer inspection, the classical view of the synchronous relationship between tropospheric methane mixing ratio and Greenland temperature observed in ice samples reveals clearly discernable variations in the magnitude of this response during the Late Pleistocene (!50 kyr BP). During the Holocene this relationship appears to decouple, indicating that other factors have modulated the methane budget in the past 10 kyr BP. The d 13 CH 4 and dD-CH 4 of tropospheric methane recorded in ice samples provide a useful constraint on the palaeomethane budget estimations. Anticipated changes in palaeoenvironmental conditions are recorded as changes in the isotope signals of the methane precursors, which are then translated into past global d 13 CH 4 and dD-CH 4 signatures. We present the first methane budgets for the late glacial period that are constrained by dual stable isotopes. The overall isotope variations indicate that the Younger Dryas ( YD) and Preindustrial Holocene have methane that is 13 C-and 2 H-enriched, relative to Modern. The shift is small for d 13 CH 4 (approx. 1‰) but greater for dD-CH 4 (approx. 9‰). The YD d 13 CH 4 -dD-CH 4 record shows a remarkable relationship between them from 12.15 to 11.52 kyr BP. The corresponding C-and H-isotope mass balances possibly indicate fluctuating emissions of thermogenic gas. This d 13 CH 4 -dD-CH 4 relationship breaks down during the YD-Preboreal transition. In both age cases, catastrophic releases of hydrates with Archaeal isotope signatures can be ruled out. Thermogenic clathrate releases are possible during the YD period, but so are conventional natural gas seepages.

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Investigation of cattle methane production and emission over a 24‐hour period using measurements of δ¹³C and δD of emitted CH₄ and rumen water

Cited by 24 publications

References 38 publications

Carbon and hydrogen isotope fractionation by moderately thermophilic methanogens 1 1Associate editor: N. E. Ostrom

Carbon and hydrogen isotope fractionation by moderately thermophilic methanogens 1 1Associate editor: N. E. Ostrom

Potential glacial‐interglacial changes in stable carbon isotope ratios of methane sources and sink fractionation

Constraining past global tropospheric methane budgets with carbon and hydrogen isotope ratios in ice

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