Determining the flux of methane into Hudson Canyon at the edge of methane clathrate hydrate stability
Ruppel, Carolyn D.
Weber, Thomas C.
Kellermann, Matthias Y.
Arrington, Eleanor C.
Valentine, David L.
Scranton, Mary I.
Kessler, John D.
MetadataShow full item record
Methane seeps were investigated in Hudson Canyon, the largest shelf-break canyon on the northern U.S. Atlantic Margin. The seeps investigated are located at or updip of the nominal limit of methane clathrate hydrate stability. The acoustic identification of bubble streams was used to guide water column sampling in a 32 km2 region within the canyon's thalweg. By incorporating measurements of dissolved methane concentration with methane oxidation rates and current velocity into a steady state box model, the total emission of methane to the water column in this region was estimated to be 12 kmol methane per day (range: 6–24 kmol methane per day). These analyses suggest that the emitted methane is largely retained inside the canyon walls below 300 m water depth, and that it is aerobically oxidized to near completion within the larger extent of Hudson Canyon. Based on estimated methane emissions and measured oxidation rates, the oxidation of this methane to dissolved CO2 is expected to have minimal influences on seawater pH.
Author Posting. © American Geophysical Union, 2016. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geochemistry, Geophysics, Geosystems 17 (2016): 3882–3892, doi:10.1002/2016GC006421.
Suggested CitationArticle: Weinstein, Alexander, Navarrete, Luis, Ruppel, Carolyn D., Weber, Thomas C., Leonte, Mihai, Kellermann, Matthias Y., Arrington, Eleanor C., Valentine, David L., Scranton, Mary I., Kessler, John D., "Determining the flux of methane into Hudson Canyon at the edge of methane clathrate hydrate stability", Geochemistry, Geophysics, Geosystems 17 (2016): 3882–3892, DOI:10.1002/2016GC006421, https://hdl.handle.net/1912/8643
Showing items related by title, author, creator and subject.
Hotchkiss, Frances Luellen Stephenson (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1982-05)Velocity and temperature time series from Hudson Submarine Canyon and hydrographic surveys of seven canyons of the Middle Atlantic Bight indicate that the effects of storms, tides, and incoming internal waves are intensified ...
Gas and gas hydrate distribution around seafloor seeps in Mississippi Canyon, Northern Gulf of Mexico, using multi-resolution seismic imagery Wood, Warren T.; Hart, Patrick E.; Hutchinson, Deborah R.; Dutta, Nadar; Snyder, Fred; Coffin, Richard B.; Gettrust, Joseph F. (Elsevier B.V., 2008-05-10)To determine the impact of seeps and focused flow on the occurrence of shallow gas hydrates, several seafloor mounds in the Atwater Valley lease area of the Gulf of Mexico were surveyed with a wide range of seismic ...
Hutchinson, Deborah R.; Hart, Patrick E.; Collett, Timothy S.; Edwards, K. M.; Twichell, David C.; Snyder, Fred (Elsevier B.V., 2008-05-10)The Keathley Canyon sites drilled in 2005 by the Chevron Joint Industry Project are located along the southeastern edge of an intraslope minibasin (Casey basin) in the northern Gulf of Mexico at 1335 m water depth. Around ...