The Global Inventory of Methane Hydrate in Marine Sediments: A Theoretical Approach
The accumulation of methane hydrate in marine sediments is controlled by a number of physical and biogeochemical parameters including the thickness of the gas hydrate stability zone (GHSZ), the solubility of methane in pore fluids, the accumulation of particulate organic carbon at the seafloor, the...
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ftrepec:oai:RePEc:gam:jeners:v:5:y:2012:i:7:p:2449-2498:d:18876 2024-04-14T08:14:50+00:00 The Global Inventory of Methane Hydrate in Marine Sediments: A Theoretical Approach Klaus Wallmann Elena Pinero Ewa Burwicz Matthias Haeckel Christian Hensen Andrew Dale Lars Ruepke https://www.mdpi.com/1996-1073/5/7/2449/pdf https://www.mdpi.com/1996-1073/5/7/2449/ unknown https://www.mdpi.com/1996-1073/5/7/2449/pdf https://www.mdpi.com/1996-1073/5/7/2449/ article ftrepec 2024-03-19T10:31:41Z The accumulation of methane hydrate in marine sediments is controlled by a number of physical and biogeochemical parameters including the thickness of the gas hydrate stability zone (GHSZ), the solubility of methane in pore fluids, the accumulation of particulate organic carbon at the seafloor, the kinetics of microbial organic matter degradation and methane generation in marine sediments, sediment compaction and the ascent of deep-seated 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 provided applying a transport-reaction model at global scale. The modeling and the data evaluation yield improved and better constrained estimates of the global pore volume within the modern GHSZ ( ≥ 44 × 10 15 m 3 ), the Holocene POC accumulation rate at the seabed (~1.4 × 10 14 g yr −1 ), the global rate of microbial methane production in the deep biosphere (4−25 × 10 12 g C yr −1 ) and the inventory of methane hydrates in marine sediments ( ≥ 455 Gt of methane-bound carbon). methane; gas hydrate; marine sediments; global change Article in Journal/Newspaper Methane hydrate RePEc (Research Papers in Economics) |
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RePEc (Research Papers in Economics) |
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The accumulation of methane hydrate in marine sediments is controlled by a number of physical and biogeochemical parameters including the thickness of the gas hydrate stability zone (GHSZ), the solubility of methane in pore fluids, the accumulation of particulate organic carbon at the seafloor, the kinetics of microbial organic matter degradation and methane generation in marine sediments, sediment compaction and the ascent of deep-seated 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 provided applying a transport-reaction model at global scale. The modeling and the data evaluation yield improved and better constrained estimates of the global pore volume within the modern GHSZ ( ≥ 44 × 10 15 m 3 ), the Holocene POC accumulation rate at the seabed (~1.4 × 10 14 g yr −1 ), the global rate of microbial methane production in the deep biosphere (4−25 × 10 12 g C yr −1 ) and the inventory of methane hydrates in marine sediments ( ≥ 455 Gt of methane-bound carbon). methane; gas hydrate; marine sediments; global change |
format |
Article in Journal/Newspaper |
author |
Klaus Wallmann Elena Pinero Ewa Burwicz Matthias Haeckel Christian Hensen Andrew Dale Lars Ruepke |
spellingShingle |
Klaus Wallmann Elena Pinero Ewa Burwicz Matthias Haeckel Christian Hensen Andrew Dale Lars Ruepke The Global Inventory of Methane Hydrate in Marine Sediments: A Theoretical Approach |
author_facet |
Klaus Wallmann Elena Pinero Ewa Burwicz Matthias Haeckel Christian Hensen Andrew Dale Lars Ruepke |
author_sort |
Klaus Wallmann |
title |
The Global Inventory of Methane Hydrate in Marine Sediments: A Theoretical Approach |
title_short |
The Global Inventory of Methane Hydrate in Marine Sediments: A Theoretical Approach |
title_full |
The Global Inventory of Methane Hydrate in Marine Sediments: A Theoretical Approach |
title_fullStr |
The Global Inventory of Methane Hydrate in Marine Sediments: A Theoretical Approach |
title_full_unstemmed |
The Global Inventory of Methane Hydrate in Marine Sediments: A Theoretical Approach |
title_sort |
global inventory of methane hydrate in marine sediments: a theoretical approach |
url |
https://www.mdpi.com/1996-1073/5/7/2449/pdf https://www.mdpi.com/1996-1073/5/7/2449/ |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
https://www.mdpi.com/1996-1073/5/7/2449/pdf https://www.mdpi.com/1996-1073/5/7/2449/ |
_version_ |
1796313088907018240 |