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Global atmospheric concentrations and source strength of ethaneA study of the variation in ethane (C2H6) concentration between northern and southern latitudes over three years is presented together with a new estimate of its source strength. Ethane concentrations vary from 0.07 to 2 p.p.b.v. (parts per billion by volume) in air samples collected in remote surface locations in the Pacific (latitude 71 N-47 S) in all four seasons between September 1984 and June 1985. The variations are consistent with southerly transport from sources located chiefly in the Northern Hemisphere, further modified by seasonal variations in the strength of the reaction of C2H6 with OH radicals. These global data can be combined with concurrent data for CH4 and the laboratory reaction rates of each with OH to provide an estimate of three months as the average atmospheric lifetime for C2H6 and 13 + or - 3 Mtons for its annual atmospheric release.
Document ID
19860056140
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Blake, D. R. (California Univ. Irvine, CA, United States)
Rowland, F. S. (California, University Irvine, United States)
Date Acquired
August 12, 2013
Publication Date
May 15, 1986
Publication Information
Publication: Nature
Volume: 321
ISSN: 0028-0836
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-452
Distribution Limits
Public
Copyright
Other