The importance of groundwater discharge to the methane budgets of nearshore and continental shelf waters of the northeastern Gulf of Mexico

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doi: 10.1016/S0016-7037(96)00290-6
Authors:Bugna, Glynnis C.; Chanton, Jeffrey P.; Cable, Jaye E.; Burnett, William C.; Cable, Peter H.
Author Affiliations:Primary:
Florida State University, Department of Oceanography, Tallahassee, FL, United States
Volume Title:Geochimica et Cosmochimica Acta
Source:Geochimica et Cosmochimica Acta, 60(23), p.4735-4746. Publisher: Pergamon, Oxford, International. ISSN: 0016-7037
Publication Date:1996
Note:In English. 67 refs.; illus., incl. 1 table, sketch maps
Summary:The results of analyses for 222Rn and CH4 are presented of water samples from 59 wells, sinkholes, springs and rivers in Franklin and Wakulla counties, Florida, USA, from 1992-1994. Nutrient concentrations for thses samples are also listed. CH4 concentrations averaged 61 ± 9 µM for these samples, while nearshore and continental shelf waters contained 27 ± 5 nM CH4. Methane budgets for nearshore and continental shelf columns indicated that groundwater seepage or sea-water circulation through the sea-bed is the dominant source of CH4 relative to benthic diffusive flux, riverine flux and in situ water column production. The correlation between 222Rn and CH4 in offshore waters supported a common benthic source.
Subjects:Aliphatic hydrocarbons; Alkanes; Carbon; Continental shelf; Discharge; Ground water; Hydrocarbons; Methane; Nearshore environment; Organic compounds; Pollution; Sea water; Atlantic Ocean; Florida; Gulf Coastal Plain; Gulf of Mexico; North Atlantic; United States
Coordinates:N300000 N300000 W0840000 W0850000
Record ID:1997012514
Copyright Information:GeoRef, Copyright 2018 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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