气候变化领域集成服务门户(CCPortal): Nonequilibrium clumped isotope signals in microbial methane

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DOI	10.1126/science.aaa4326
	Nonequilibrium clumped isotope signals in microbial methane
	Wang D.T.; Gruen D.S.; Sherwood Lollar B.; Hinrichs K.-U.; Stewart L.C.; Holden J.F.; Hristov A.N.; Pohlman J.W.; Morrill P.L.; Könneke M.; Delwiche K.B.; Reeves E.P.; Sutcliffe C.N.; Ritter D.J.; Seewald J.S.; McIntosh J.C.; Hemond H.F.; Kubo M.D.; Cardace D.; Hoehler T.M.; Ono S.
发表日期	2015
ISSN	0036-8075
起始页码	428
结束页码	431
卷号	348 期号:6233
英文摘要	Methane is a key component in the global carbon cycle, with a wide range of anthropogenic and natural sources. Although isotopic compositions of methane have traditionally aided source identification, the abundance of its multiply substituted "clumped" isotopologues (for example, 13CH3D) has recently emerged as a proxy for determining methane-formation temperatures. However, the effect of biological processes on methane's clumped isotopologue signature is poorly constrained.We show that methanogenesis proceeding at relatively high rates in cattle, surface environments, and laboratory cultures exerts kinetic control on 13CH3D abundances and results in anomalously elevated formation-temperature estimates. We demonstrate quantitatively that H2 availability accounts for this effect. Clumped methane thermometry can therefore provide constraints on the generation of methane in diverse settings, including continental serpentinization sites and ancient, deep groundwaters. © 2015, American Association for the Advancement of Science. All rights reserved.
英文关键词	carbon; clumped isotope; hydrogen; isotope; methane; natural gas; unclassified drug; ground water; methane; carbon cycle; cattle; groundwater; isotopic analysis; isotopic composition; methane; serpentinization; Article; covalent bond; environmental temperature; fractionation; hydrogen bond; hydrothermal vent; methanogen; methanogenesis; methanogenic archaeon; Michaelis Menten kinetics; microbial metabolism; nonhuman; precipitation; priority journal; ruminant stomach; spectroscopy; swamp; thermodynamics; thermometry; animal; biosynthesis; bovine; carbon cycle; chemistry; metabolism; Methanomicrobiales; temperature; Bos; Animals; Carbon Cycle; Carbon Isotopes; Cattle; Groundwater; Hydrogen; Methane; Methanomicrobiales; Temperature
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245944
作者单位	Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, United States; Marine Chemistry and Geochemistry Department, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Department of Earth Sciences, University of Toronto, Toronto, ON M5S 3B1, Canada; MARUM Center for Marine Environmental Sciences, Department of Geosciences, University of Bremen, Bremen, D-28359, Germany; Department of Microbiology, University of Massachusetts, Amherst, MA 01003, United States; Department of Animal Science, Pennsylvania State University, University Park, PA 16802, United States; U.S. Geological Survey (USGS), Woods Hole Coastal and Marine Science Center, Woods Hole, MA 02543, United States; Department of Earth Sciences, Memorial University of Newfoundland, St John's, Newfoundland and Labrador A1B 3X5, Canada; Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States;...
推荐引用方式 GB/T 7714	Wang D.T.,Gruen D.S.,Sherwood Lollar B.,et al. Nonequilibrium clumped isotope signals in microbial methane[J],2015,348(6233).
APA	Wang D.T..,Gruen D.S..,Sherwood Lollar B..,Hinrichs K.-U..,Stewart L.C..,...&Ono S..(2015).Nonequilibrium clumped isotope signals in microbial methane.Science,348(6233).
MLA	Wang D.T.,et al."Nonequilibrium clumped isotope signals in microbial methane".Science 348.6233(2015).