Bigalke, Nikolaus (2008) Constraining Hydrate-Mediated Transfer of the Greenhouse Gases CO₂ and CH₄ to the Ocean at Controlled Thermodynamic and Hydrodynamic Forcing. (PhD/ Doctoral thesis), Christian-Albrechts-Universität, Kiel, Germany, 114 pp.

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Abstract

At pressures and temperatures prevailing in the ocean at a few hundred meters depth transfer of methane and carbon dioxide into and within the water column are influenced by the thermodynamic and kinetic stability of clathrates formed by these two greenhouse gases. Thus, a better understanding of hydrate formation and stability is essential to assess the contribution of submarine methane seepage to climate change, the hazard potential of submarine gas hydrate deposits and the feasibility and environmental impact of anthropogenic carbon storage in the marine environment. The present survey deals with laboratory-based investigations of hydrate-controlled transfer and transport processes of the two gases in the ocean. The investigation stresses the importance of water column processes on the fate of gases released at the sediment/seawater interface and fills a gap in the data basis needed to model the balance of the vertical transfer of the two most important greenhouse gases in the ocean.

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