Journal ArticleDOI
Increase of Atmospheric Methane Recorded in Antarctic Ice Core
TLDR
Measurements of the methane concentration in air extracted by two different methods from ice samples from Siple Station in western Antarcitica allow the reconstruction of the history of the increase of the atmospheric methane during the past 200 years.Abstract:
Air entrapped in bubbles of cold ice has essentially the same composition as that of the atmosphere at the time of bubble formation. Measurements of the methane concentration in air extracted by two different methods from ice samples from Siple Station in western Antarcitica allow the reconstruction of the history of the increase of the atmospheric methane during the past 200 years.read more
Citations
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Journal ArticleDOI
Biogeochemical aspects of atmospheric methane
TL;DR: In this paper, the authors identify and evaluate several constraints on the budget of atmospheric methane, its sources, sinks and residence time, and construct a list of sources and sinks, identities, and sizes.
Journal ArticleDOI
Ice core record of the 13 C/ 12 C ratio of atmospheric CO 2 in the past two centuries
TL;DR: The authors measured δ13C of CO2 separated from air trapped in bubbles in ice samples from an ice core taken at Siple Station in Antarctica, in which it has been possible to demonstrate the atmospheric increase of CO 2 and methane2 with high time resolution.
Book
An introduction to organic geochemistry
Stephen Killops,Vanessa Killops +1 more
TL;DR: In this paper, the authors investigated the long-term fate of organic matter in the geosphere and its role in sedimentary organic matter preservation and degradation in the geological timescale.
Journal ArticleDOI
The oxidizing capacity of the earth's atmosphere: probable past and future changes.
TL;DR: Models and the observational network for oxidants are improving, but validation of global models is still at an early stage and positive and negative trends possible for OH and H2O2.
Journal ArticleDOI
Review and assessment of methane emissions from wetlands
TL;DR: In this paper, the authors reviewed progress on estimating and understanding both the magnitude of, and controls on, emissions of CH4 from natural wetlands and calculated global wetland CH4 emissions using this extensive flux data base and the wetland areas compiled and published by Matthews and Fung (1987).
References
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Journal ArticleDOI
Biomass burning as a source of atmospheric gases CO, H 2 , N 2 O, NO, CH 3 Cl and COS
Paul J. Crutzen,Leroy E. Heidt,Joseph P. Krasnec,W. H. Pollock,Wolfgang Seiler,Wolfgang Seiler +5 more
TL;DR: In this article, it was shown that most biomass burning takes place in the tropics in the dry season and is caused by man's activities, which can contribute extensively to the budgets of several gases which are important in atmospheric chemistry.
Journal ArticleDOI
Evidence from polar ice cores for the increase in atmospheric CO2 in the past two centuries
TL;DR: The most reliable assessment of the ancient atmospheric CO2 concentration is derived from measurements of air occluded in ice cores from Siple Station (West Antartica) that allows determination of the enclosed gas concentration with very good time resolution has recently become available as mentioned in this paper.
Book ChapterDOI
Biomass burning as a source of atmospheric gases CO, H2, N2O, NO, CH3Cl and COS
TL;DR: In this paper, the authors show the probable importance of biomass burning as a trace gas source, which is caused by man's activities in the tropics, and derive some rough estimates of the sources of important atmospheric trace gases CO, H2, CH4, N2O, NOx (NO and NO2), COS and CH3Cl from the worldwide burning of biomass.
Journal ArticleDOI
Sources, sinks, and seasonal cycles of atmospheric methane
M. A. K. Khalil,R. A. Rasmussen +1 more
TL;DR: In this paper, a lifetime of approximately 8 years is most consistent with the observed latitudinal variation of atmospheric methane, requiring the current global emissions of methane to be around 550 teragrams per year.
Journal ArticleDOI
Atmospheric methane in the recent and ancient atmospheres Concentrations, trends, and interhemispheric gradient
R. A. Rasmussen,M. A. K. Khalil +1 more
TL;DR: In this paper, an analysis of air bubbles buried long ago in polar ice makes it possible to deduce the concentrations of methane in the old and ancient atmospheres, finding that the present concentration of methane may be more than twice as high as the natural levels of 150 years ago.