No inter-hemispheric [delta]^sup 13^CH^sub 4^ trend observed/Kai, Tyler, Randerson & Blake reply

Important next steps, in our opinion, are (1) to use all available observations fromboth the Kai et al.2 and Levin et al.1 studies to assess trends in methane isotopes and their dependence on the inclusion or exclusion of individual time series, and (2) to quantify changes in microbial and fossil so...

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Bibliographic Details
Published in:Nature (London) 2012-06, Vol.486 (7404), p.E3
Main Authors: Levin, I, Veidt, C, Vaughn, B H, Brailsford, G, Bromley, T, Heinz, R, Lowe, D, Miller, J B, Poss, C, White, J W C, Kai, Fuu Ming, Tyler, Stanley C, Randerson, James T, Blake, Donald R
Format: Article
Language:English
Subjects:
Budgets
Emissions
Fertilizer application
Fossil fuels
Growth rate
Laboratories
Studies
Time series
Trends
Water management
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Summary:Important next steps, in our opinion, are (1) to use all available observations fromboth the Kai et al.2 and Levin et al.1 studies to assess trends in methane isotopes and their dependence on the inclusion or exclusion of individual time series, and (2) to quantify changes in microbial and fossil sources consistent with the expanded set of observations presented by Levin et al.1. Even with a levelling offof both fossil and microbial sources during 1990-2005, our forward biogeochemical modelling analysis of rice agriculture provides evidence that emissions from this sector of the budget declined as a consequence of changes in fertilizer application and water management.
ISSN:0028-0836
1476-4687