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Anaerobic oxidation...
Anaerobic oxidation has a minor effect on mitigating seafloor methane emissions from gas hydrate dissociation
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- Stranne, Christian, 1979- (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Stockholms universitets Östersjöcentrum,Stockholm University, Sweden
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- O'Regan, Matt (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Stockholm University, Sweden
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- Hong, Wei-Li (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Stockholms universitets Östersjöcentrum,Stockholm University, Sweden
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- Brüchert, Volker, 1965- (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Stockholm University, Sweden
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- Ketzer, João Marcelo (author)
- Linnéuniversitetet,Institutionen för biologi och miljö (BOM),Vatten
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- Thornton, Brett F. (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Stockholm University, Sweden
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- Jakobsson, Martin, 1966- (author)
- Stockholms universitet,Institutionen för geologiska vetenskaper,Stockholm University, Sweden
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(creator_code:org_t)
- 2022-07-28
- 2022
- English.
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In: Communications Earth & Environment. - : Springer Nature. - 2662-4435. ; 3:1
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Abstract
Subject headings
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- Continental margin sediments contain large reservoirs of methane stored as gas hydrate. Ocean warming will partly destabilize these reservoirs which may lead to the release of substantial, yet unconstrained, amounts of methane. Anaerobic oxidation of methane is the dominant biogeochemical process to reduce methane flux, estimated to consume 90% of the methane produced in marine sediments today. This process is however neglected in the current projections of seafloor methane release from gas hydrate dissociation. Here, we introduce a fully coupled oxidation module to a hydraulic-thermodynamic-geomechanical hydrate model. Our results show that for seafloor warming rates > 1 degrees C century(-1), the efficiency of anaerobic oxidation of methane in low permeability sediments is poor, reducing the seafloor methane emissions by <5%. The results imply an extremely low mitigating effect of anaerobic oxidation of methane on climate warming-induced seafloor methane emissions. Microbial anaerobic oxidation of methane may not substantially mitigate projected warming-induced emissions of methane from marine hydrate-bearing sediments, according to a coupled hydraulic-thermodynamic-geomechanical hydrate model.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Biologi -- Mikrobiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Microbiology (hsv//eng)
Keyword
- Mikrobiologi
- Microbiology
- Environmental Chemistry
- Miljökemi
Publication and Content Type
- ref (subject category)
- art (subject category)
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