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Radon as a tracer of biogenic gas equilibration and transport from methane-saturated sedimentsData on Rn-222 activity in methane-rich gas bubbles from anoxic coastal sediments of Cape Lookout Bight, North Carolina, were used to determine gas equilibration with pore waters and the rates of ebullitive stripping and transport of gases to overlying waters and the atmosphere. Results showed that, during summer months, the bubble ebullition process strips and transports 1.9-4.8 percent/day of the standing crop of radon (and, by inference, other gases equilibrated with gas bubbles) in surface sediments of Cape Lookout Bight to the troposphere. Thus, the ebullitive mode of gas transport represents an effective mechanism for delivering reduced biogenic gases directly to the atmosphere.
Document ID
19890047793
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Martens, Christopher S.
(North Carolina Univ. Chapel Hill, NC, United States)
Chanton, Jeffrey P.
(North Carolina, University Chapel Hill, United States)
Date Acquired
August 14, 2013
Publication Date
March 20, 1989
Publication Information
Publication: Journal of Geophysical Research
Volume: 94
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
89A35164
Funding Number(s)
CONTRACT_GRANT: NAGW-1445
CONTRACT_GRANT: NAGW-593
Distribution Limits
Public
Copyright
Other

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