Revisiting enteric methane emissions from domestic ruminants and their δ13CCH4 source signature

16017 13 88123 2 251497 document 88123 s41467-019-11066-3.pdf application/pdf ad7bd98f94e2aabfa3a572a0c94bc1ab MD5 1590063 2019-07-31 11:34:48 https://pure.iiasa.ac.at/id/eprint/16017/1/s41467-019-11066-3.pdf 16017 1 1 application/pdf text en public cc_by_4

s41467-019-11066-3.pdf

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/88123 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/88123 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/88123 archive 353 disk0/00/01/60/17 2019-07-31 11:37:39 2024-09-09 12:43:24 2019-07-31 11:37:44 article show Chang J. 2233 0000-0003-4463-7778 Peng S. Ciais P. Saunois M. Dangal S. Herrero M. Havlik P. 1868 0000-0001-5551-5085 Tian H. Bousquet P. Revisiting enteric methane emissions from domestic ruminants and their δ13CCH4 source signature pub prog_esm Accurate knowledge of 13C isotopic signature (δ13C) of methane from each source is crucial for separating biogenic, fossil fuel and pyrogenic emissions in bottom-up and top-down methane budget. Livestock production is the largest anthropogenic source in the global methane budget, mostly from enteric fermentation of domestic ruminants. However, the global average, geographical distribution and temporal variations of the δ13C of enteric emissions are not well understood yet. Here, we provide a new estimation of C3-C4 diet composition of domestic ruminants (cattle, buffaloes, goats and sheep), a revised estimation of yearly enteric CH4 emissions, and a new estimation for the evolution of its δ13C during the period 1961–2012. Compared to previous estimates, our results suggest a larger contribution of ruminants’ enteric emissions to the increasing trend in global methane emissions between 2000 and 2012, and also a larger contribution to the observed decrease in the δ13C of atmospheric methane. 2019-07-31 published Nature Publishing Group 10.1038/s41467-019-11066-3 3116 119 public Nature Communications 10 1 e3420 TRUE 2041-1723 Effects of phosphorus limitations on Life, Earth system and Society (IMBALANCE-P, FP7 610028) FALSE yes info:eu-repo/grantAgreement/EC/FP7/610028/EU/Effects of phosphorus limitations on Life, Earth system and Society/IMBALANCE-P info:eu-repo/semantics/article info:eu-repo/semantics/openAccess