Dissolved methane distributions and air-sea flux in the plume of a massive seep field, Coal Oil Point, California

Details Dissolved methane distributions and air-sea flux in the plume of a massive seep field, Coal Oil Point, California Dissolved methane distributions and air-sea flux in the plume of a massive seep field, Coal Oil Point, California

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3422603m&link_type=abstract

Geophysical Research Letters, Volume 34, Issue 22, CiteID L22603

Mathematics

Logic

13

Oceanography: Biological And Chemical: Carbon Cycling (0428), Oceanography: Physical: Air/Sea Interactions (0312, 3339), Oceanography: Physical: Hydrography And Tracers, Marine Geology And Geophysics: Gas And Hydrate Systems, Geochemistry: Marine Geochemistry (4835, 4845, 4850)

Scientific paper

Large quantities of natural gas are emitted from the seafloor into the stratified coastal ocean near Coal Oil Point, Santa Barbara Channel, California. Methane was quantified in the down current surface water at 79 stations in a 280 km2 study area. The methane plume spread over an area of ~70 km2 and emitted on the order of 5 × 104 mol d-1 to the atmosphere. A monthly time series at 14 stations showed variable methane concentrations which were correlated with changing sub-mesoscale surface currents. Air-sea fluxes estimated from the time series indicate that the air-sea flux derived for the 280 km2 area is representative of the daily mean flux from this area. Only 1% of the dissolved methane originating from Coal Oil Point enters the atmosphere within the study area. Most of it appears to be transported below the surface and oxidized by microbial activity.

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