Detection of multiply deuterated methane in the atmosphere

Details Detection of multiply deuterated methane in the atmosphere Detection of multiply deuterated methane in the atmosphere

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..677m&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 16, July 1989, p. 677, 678. Research supported by DOE.

Physics

4

Antarctic Regions, Atmospheric Composition, Deuterium Compounds, Methane, Abundance, Troposphere

Scientific paper

Measurements of the isotopic composition of methane in the Antarctic atmosphere have indicated tha presence of either C-12D4 or C-13HD3. The concentration is about 1.3 x 10 to the -16th(v/v). This concentration is at least 500 times higher than expected from the statistical combination of the natural isotopic abundances of H, D, C-12 and C-13. There are no known sources of these species large nough to explain these concentrations. It is possible that these species have accumulated in the atmosphere by virtue of having atmospheric residence times that are substantially longer than the residence time of CH4.

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