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- W2058598170 abstract "We used 50 kHz sonar data to estimate natural hydrocarbon emission rates from the 18 km 2 marine seep field offshore from Coal Oil Point, Santa Barbara, California. The hydrocarbon gas emission rate is 1.7 ± 0.3 × 10 5 m 3 d −1 (including gas captured by a subsea seep containment device) and the associated oil emission rate is 1.6 ± 0.2 × 10 4 Ld −1 (100 barrels d −1 ). The nonmethane hydrocarbon emission rate from the gas seepage is 35±7 td −1 and a large source of air pollution in Santa Barbara County. Our estimate is equal to twice the emission rate from all the on‐road vehicle traffic in the county. Our estimated methane emission rate for the Coal Oil Point seeps (80±12 td −1 ) is 4 times higher than previous estimates. The most intense areas of seepage correspond to structural culminations along anticlinal axes. Seep locations are mostly unchanged from those documented in 1946, 1953, and 1973. An exception is the seepage field that once existed near offshore oil platform Holly. A reduction in seepage within a 1 km radius around this offshore platform is correlated with reduced reservoir pressure beneath the natural seeps due to oil production. Our findings suggest that global emissions of methane from natural marine seepage have been underestimated and may be decreasing because of oil production." @default.
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- W2058598170 date "1999-09-15" @default.
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- W2058598170 title "The world's most spectacular marine hydrocarbon seeps (Coal Oil Point, Santa Barbara Channel, California): Quantification of emissions" @default.
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- W2058598170 doi "https://doi.org/10.1029/1999jc900148" @default.
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