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

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    Additional file information (1.485Kb)
    Figure S1: Wind speed versus methane air-sea flux of the 280 km2 study area. (1006.Kb)
    Date
    2007-11-24
    Author
    Mau, Susan  Concept link
    Valentine, David L.  Concept link
    Clark, Jordan F.  Concept link
    Reed, Justin  Concept link
    Camilli, Richard  Concept link
    Washburn, Libe  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/3349
    As published
    https://doi.org/10.1029/2007GL031344
    DOI
    10.1029/2007GL031344
    Keyword
     Air-sea flux; Shallow marine seep; Methane 
    Abstract
    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.
    Description
    Author Posting. © American Geophysical Union, 2007. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 34 (2007): L22603, doi:10.1029/2007GL031344.
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    Suggested Citation
    Geophysical Research Letters 34 (2007): L22603
     

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