Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Methane source"”.
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Retrieval of methane and carbon monoxide using near infrared spectra recorded by SCIAMACHY onboard ENVISAT : Algorithm Development and data analysis
… spectrometers enable the global retrieval of methane, carbon dioxide and carbon monoxide for the first time with high sensitivity to nearground atmospheric layers. In this thesis, an algorithm was developed based on the principles of differential optical absorption spectroscopy (DOAS), that …
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Estimation of methane and carbon dioxide surface fluxes using a 3-D global atmospheric chemical transport model
Methane (CH₄) and carbon dioxide (CO₂) are the two most radiatively important greenhouse gases attributable to human activity. Large uncertainties in their source and sink magnitudes currently exist. We estimate global methane surface emissions between 1996 and 2001, using a top-down approach that …
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The biogeochemistry of methane isotopologues in marine and lacustrine sediments
Methane is a globally significant greenhouse gas, energy resource, and it is a product and reactant of microbial metabolisms. Multiple sources and sinks of methane can be challenging to distinguish from each other, thus complicating the understanding of methane budgets and the effects of microbes …
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Detecting Methane Anomalies from Satellite Data in the Arctic
… most powerful anthropogenic greenhouse gas is methane. Relevant and reliable information about the sources and sinks of methane is needed to mitgate climate change and its effects. This is particularly true in the Arctic, where the rapidly warming climate poses unprecedented environmental …
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The Biogeochemistry of Methane Isotopologues in Marine and Lacustrine Sediments
Methane is a globally significant greenhouse gas, energy resource, and it is a product and reactant of microbial metabolisms. Multiple sources and sinks of methane can be challenging to distinguish from each other, thus complicating the understanding of methane budgets and the effects of microbes …
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Methane Fluxes from Living and Dead Trees in a Temperate Forest
Trees have been identified as an important source of methane in forest ecosystems, but little research exists on fluxes beyond their stems, such as those from foliage, branches, wounds, and coarse woody debris. Recent instrumentation advances allow rapid and accurate measurements of relatively low …
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Partitioning Biological and Anthropogenic Methane Sources
<p>Methane is an important greenhouse gas, and an ideal target for greenhouse gas emissions reductions. Unlike carbon dioxide, methane has a relatively short atmospheric lifetime, so reductions in methane emissions could have large and immediate impacts on anthropogenic radiative forcing. A more …
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The marine geochemistry of methane
… coastal surface waters near Walvis Bay, methane is present in concentrations considerably above those which would be predicted from solubility equilibrium with the atmosphere. A one dimensional diffusive model and a one dimensional horizontal advection diffusion model were used to …