Continuing decline in the growth rate of the atmospheric methane burden
Article Abstract:
The methane burden in the world's atmosphere has increased by over 100% since industrialization began, and this contributes to climate change. It is important to measure methane levels due to this link with climate. The burden has increased, but the rate of increase was slower between 1984 and 1996. Annual emissions appear to be almost constant in this period. A drop in the growth rate appears to be linked to a steady state being approached using a timescale that takes into account the atmospheric lifetime of methane. Average mixing ratios of methane look set to increase slowly. The weight of the impact of methane on the greenhouse effect does not appear likely to change.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Gas with an ancient history
Article Abstract:
Ueno et al. report evidence from the 300 million year old rocks in the Dresser Formation in Western Australia, for the existence of an ancient population of methane producing microbes, known as methanogens which represents one of the earliest specific microbial processes to be identified in the geological record. The silica dykes housing the methane originated from deep in Earth's crust and these results point to an active subsurface biosphere, indicating the presence of microorganisms on the Earth 3.5 billion years ago.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
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Disruption of extended defects in solid oxide fuel cell anodes for methane oxidation
Article Abstract:
An oxide anode formed from lanthanum-substituted strontium titanate (La-SrTiO(sub 3)) which can control the oxygen stoichiometry regions in order to break down the extended defect intergrowth regions. Through partially replacing titanium with some manganese and gallium, a solid oxide fuel cell anode with similar performance in hydrogen to nickel/zirconia cermets has been achieved.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 2006
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