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Carbon-14 in methane sources and in atmospheric methane - The contribution from fossil carbonMeasurements of carbon-14 in small samples of methane from major biogenic sources, from biomass burning, and in clean air samples from both the Northern and Southern hemispheres reveal that methane from ruminants contains contemporary carbon, whereas that from wetlands, peat bogs, rice fields, and tundra, is somewhat depleted in carbon-14. Atmospheric (C-14)H4 seems to have increased from 1986 to 1987, and levels at the end of 1987 were 123.3 + or - 0.8 percent modern carbon in the Northern Hemisphere and 120.0 + or - 0.7 percent modern carbon in the Southern Hemisphere.
Document ID
19890059228
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Wahlen, M.
(New York State Dept. of Health Albany, NY, United States)
Tanaka, N.
(New York State Dept. of Health Albany, NY, United States)
Henry, R.
(New York State Dept. of Health Albany, NY, United States)
Deck, B.
(New York State Dept. of Health Albany, NY, United States)
Zeglen, J.
(New York State Dept. of Health, Albany, United States)
Date Acquired
August 14, 2013
Publication Date
July 21, 1989
Publication Information
Publication: Science
Volume: 245
ISSN: 0036-8075
Subject Category
Geophysics
Accession Number
89A46599
Funding Number(s)
CONTRACT_GRANT: NAGW-843
Distribution Limits
Public
Copyright
Other

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