Content with the tag: “carbon dioxide”
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Marine Methane Oxidation Without Sulfur
A new study in the current issue of Science from NAI’s Penn State team shows that the anaerobic oxidation of methane is not solely a sulfate-dependent process. Microbes cultured from marine methane seeps in California’s Eel River Basin have demonstrated capability of using manganese and iron to oxidize methane to carbon dioxide. These same compounds may have been key to methane oxidation in the early, oxygen-less days of Earth’s atmosphere.
Source: [Link]
July 9, 2009 / Posted by: Daniella Scalice
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Greenhouse Gases on Early Earth Helped Keep It Warm
A team of researchers including members of NAI’s University of Colorado, Boulder Team have provided the first direct field evidence supporting the theory that high concentrations of greenhouse gases could have helped avoid global freezing on the early Earth. They analyzed iron carbonates from 3.75-3.8 billion year old rocks in northern Québec, and conclude that the atmosphere of early Earth contained high levels of CO2. Their paper appears in a recent issue of Earth and Planetary Science Letters.
Source: [Link]
February 6, 2007 / Posted by: Shige Abe
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Organic Hazes on Early Earth and Titan
Researchers from NAI’s Unviersity of Colorado, Boulder and University of Arizona Teams have published a new study in PNAS this week about the atmospheres of both present day Titan and early Earth. For Titan, their experiments modeled conditions measured by the Huygens probe from NASA’s Cassini mission, and CO2 was added to model the early Earth conditions. They conclude that organize haze can form over a wide range of methane and carbon dioxide concentrations.
Source: [Link]
November 6, 2006 / Posted by: Shige Abe
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