Constraining the global inventory of methane hydrate in marine sediments.

Wallmann, Klaus, Burwicz, Ewa, Ruepke, Lars H., Marquardt, Mathias, Pinero, Elena, Haeckel, Matthias and Hensen, Christian (2011) Constraining the global inventory of methane hydrate in marine sediments. Open Access In: Proceedings of the 7th International Conference on Gas Hydrates (ICGH2011). . HWU, Edinburgh, UK, 129/1-13.

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Abstract

The accumulation of methane hydrate in marine sediments is basically controlled by the accumulation of particulate organic carbon at the seafloor, the kinetics of microbial organic matter degradation and methane generation in marine sediments, the thickness of the gas hydrate stability zone (GHSZ), the solubility of methane in pore fluids within the GHSZ and the ascent of deepseated pore fluids and methane gas into the GHSZ. Our present knowledge on these controlling factors is discussed and new estimates of global sediment and methane fluxes are presented. A new transport-reaction model is applied at a global grid defined by these up- dated parameter values. The model yields an improved and better constrained estimate of the global inventory of methane gas hydrates in marine sediments (3000 ± 2000 Gt of methane carbon).

Document Type: Book chapter
Funder compliance: info:eu-repo/grantAgreement/EC/FP7/265847
Additional Information: 7th International Conference on Gas Hydrates (ICGH2011), Edinburgh, UK, 17.21.07.2011
Keywords: Meeresgeologie; Gas hydrates; methane; energy; methane hydrates; marine sediments; global inventory; transport-reaction modeling
Research affiliation: OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-JRG-B3 Seabed Resources
OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems
OceanRep > The Future Ocean - Cluster of Excellence
OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS Magmatic and Hydrothermal Systems
Projects: ECO2, Future Ocean
Date Deposited: 09 Nov 2011 11:51
Last Modified: 27 Feb 2013 11:39
URI: http://oceanrep.geomar.de/id/eprint/12473

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