Fossil methane source dominates Cariaco Basin water column methane geochemistry
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چکیده
منابع مشابه
Carbon-14 in methane sources and in atmospheric methane: the contribution from fossil carbon.
Measurements 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, pat bogs, rice fields, and tundra is somewhat, depleted in carbon-14. Atmospheric (14)GH(4) seems to have increased from 198...
متن کاملThe atmospheric cycling of radiomethane and the “fossil fraction” of the methane source
The cycling of CH4 (“radiomethane”) through the atmosphere has been strongly perturbed in the industrial era by the release of 14C-free methane from geologic reservoirs (“fossil methane” emissions), and in the nuclear era, especially since ca 1970, by the direct release of nucleogenic radiomethane from nuclear power facilities. Contemporary measurements of atmospheric radiomethane have been use...
متن کاملRadiomethane cycling and the fossil fraction of methane
The atmospheric cycling of radiomethane and the “fossil fraction” of the methane source K. R. Lassey, D. C. Lowe, and A. M. Smith National Institute of Water and Atmospheric Research, P.O. Box 14-901, Wellington, New Zealand Australian Nuclear Science and Technology Organisation, PMB 1, Menai NSW 2234, Australia Received: 6 April 2006 – Accepted: 3 May 2006 – Published: 21 June 2006 Corresponde...
متن کاملSpatial patterns and source attribution of urban methane in the Los Angeles Basin
Urban areas are increasingly recognized as a globally important source of methane to the atmosphere; however, the location of methane sources and relative contributions of source sectors are not well known. Recent atmospheric measurements in Los Angeles, California, USA, show that more than a third of the city’s methane emissions are unaccounted for in inventories and suggest that fugitive foss...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2005
ISSN: 0094-8276
DOI: 10.1029/2005gl022984