By M. A. K. Khalil (auth.), M. A. K. Khalil (eds.)
Methane performs many vital roles within the earth's atmosphere. it's a effective "greenhouse gasoline" that warms the earth; controls the oxidizing potential of the ambience (OH) ultimately affecting the cycles and abundances of many atmospheric hint gases; presents water vapor to the stratosphere; scavenges chlorine atoms from the stratosphere, terminating the catalytic ozone destruction via chlorine atoms, together with the chlorine published from the man-made chlorofluorocarbons; produces ozone, CO, and CO2 within the troposphere; and it's an index of lifestyles on the earth and so is found in larger amounts in the course of hot interglacial epochs and dwindles to low degrees through the chilly of ice a while. via all measures, methane is the second one simply to CO2 in inflicting destiny worldwide warming. The booklet offers a complete account of the present realizing of atmospheric methane, and it's an finish element for summarizing greater than a decade of extensive learn at the international resources, sinks, concentrations, and environmental function of methane.
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Additional resources for Atmospheric Methane: Sources, Sinks, and Role in Global Change
Processes involved in formation and emission of methane in rice paddies. , 7:33-53. , W. Seiler, R Conrad. 1990. Influence of soil temperature on methane emission from rice paddy fields. , 11:77-95. C. B. J. Prather. 1990. Troposheric OH in a three dimensional chemical tracer model: An assessment based on observations of CH3CCI3. J. Geophys. , 95:18,441-18,47l. C. Salmond, H. C. Murrell. 1990. Screening of obligate methanotrophs for soluble methane monooxygenase genes. , 70:211-216. A, RD. M. D.
27 daily intervals shortly after flooding and weekly intervals during stable water regimes. Periodic 24-hour flux measurements should be conducted throughout the vegetation period if significant diurnal flux variations are to be expected. Besides the measurement of the net emission rate of methane, it would be important to know the ratio between emission and production of methane. In other words, how much of the methane produced in the soil is emitted and how much of it is oxidized. Methods have been developed for quantifying the effect of methane oxidation on the diffusive flux of methane through the oxic surface layer of a sediment or flooded rice soil.
Micrometeorological techniques for the measurement of trace gas exchange. In: Exchange of Trace Gases between Terrestrial Ecosystems and the Atmosphere. O. S. ), Wiley, Chichester, pp 189-207. , P. AK. Khalil. 1986. Methane, carbon monoxide and methylchloroform in the southern hemisphere. 1. Atmos. , 4:3-42. , B. Thebrath, R Conrad. 1990. Oxidation of methane in the oxic surface layer of a deep lake sediment (Lake Constance). FEMS Microbiol. , 73:149-158. , F. Rothfuss, R Conrad. 1992. Oxygen profiles and methane turnover in a flooded rice microcosm.