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Methane flux from coastal salt marshesIt is thought that biological methanogenesis in natural and agricultural wetlands and enteric fermentation in animals are the dominant sources of global tropospheric methane. It is pointed out that the anaerobic soils and sediments, where methanogenesis occurs, predominate in coastal marine wetlands. Coastal marine wetlands are generally believed to be approximately equal in area to freshwater wetlands. For this reason, coastal marine wetlands may be a globally significant source of atmospheric methane. The present investigation is concerned with the results of a study of direct measurements of methane fluxes to the atmosphere from salt marsh soils and of indirect determinations of fluxes from tidal creek waters. In addition, measurements of methane distributions in coastal marine wetland sediments and water are presented. The results of the investigation suggest that marine wetlands provide only a minor contribution to atmospheric methane on a global scale.
Document ID
19850056706
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bartlett, K. B.
(NASA Langley Research Center Atmospheric Sciences Div.; College of William and Mary Hampton, VA, United States)
Harriss, R. C.
(NASA Langley Research Center Hampton, VA, United States)
Sebacher, D. I.
(NASA Langley Research Center Atmospheric Sciences Div., Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
June 20, 1985
Publication Information
Publication: Journal of Geophysical Research
Volume: 90
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
85A38857
Funding Number(s)
CONTRACT_GRANT: NAS1-16673
Distribution Limits
Public
Copyright
Other

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