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Cited by 1,575

The DOI matches its Crossref record; 8 of the 8 references it cites were found in a registry or an index.

Oceanic Methane Biogeochemistry

Open access
Reeburgh, William S.·2007·Chemical Reviews

Abstract

This review shows that thermodynamic and kinetic constraints largely prevent large-scale methanogenesis in the open ocean water column. One example of open-ocean methanogenesis involves anoxic digestive tracts and fecal pellet microenvironments; methane released during fecal pellet disaggregation results in the mixed-layer methane maximum. However, the bulk of the methane in the ocean is added by coastal runoff, seeps, hydrothermal vents, decomposing hydrates, and mud volcanoes. Since methane is present in the open ocean at nanomolar concentrations, and since the flux to the atmosphere is small, the ultimate fate of ocean methane additions must be oxidation within the ocean. As indicated in the Introduction and highlighted in Table 3, sources of methane to the ocean water column are poorly quantified. There are only a small number of direct water column methane oxidation rates, so sinks are also poorly quantified. We know that methane oxidation rates are sensitive to ambient methane concentrations, but we have no information on reaction kinetics and only one report of the effect of pressure on methane oxidation. Our perspective on methane sources and the extent of methane oxidation has been changed dramatically by new techniques involving gene probes, determination of isotopically depleted biomarkers, and recent 14C-CH4 measurements showing that methane geochemistry in anoxic basins is dominated by seeps providing fossil methane. The role of anaerobic oxidation of methane has changed from a controversial curiosity to a major sink in anoxic basins and sediments. © 2007 American Chemical Society.

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Metadata

Authors
Reeburgh, W. S.
Venue
Chemical Reviews
Published
2007-01-30
Volume
107
Issue
2
Pages
486-513
ISSN
  • 0009-2665 (ISSN-L)
  • 1520-6890
OpenAlex
W1992383576
Cited by
1,575
References
8
FWCI
3.39
Type
journal article
Language
en
Open access
green

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