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Revised methane emissions factors and spatially distributed annual carbon fluxes for global livestock

Overview of attention for article published in Carbon Balance and Management, September 2017
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • One of the highest-scoring outputs from this source (#1 of 226)
  • High Attention Score compared to outputs of the same age (99th percentile)

Mentioned by

74 news outlets
15 blogs
94 X users
5 Facebook pages
12 Wikipedia pages
4 Google+ users
2 YouTube creators


148 Dimensions

Readers on

342 Mendeley
1 CiteULike
Revised methane emissions factors and spatially distributed annual carbon fluxes for global livestock
Published in
Carbon Balance and Management, September 2017
DOI 10.1186/s13021-017-0084-y
Pubmed ID

Julie Wolf, Ghassem R. Asrar, Tristram O. West


Livestock play an important role in carbon cycling through consumption of biomass and emissions of methane. Recent research suggests that existing bottom-up inventories of livestock methane emissions in the US, such as those made using 2006 IPCC Tier 1 livestock emissions factors, are too low. This may be due to outdated information used to develop these emissions factors. In this study, we update information for cattle and swine by region, based on reported recent changes in animal body mass, feed quality and quantity, milk productivity, and management of animals and manure. We then use this updated information to calculate new livestock methane emissions factors for enteric fermentation in cattle, and for manure management in cattle and swine. Using the new emissions factors, we estimate global livestock emissions of 119.1 ± 18.2 Tg methane in 2011; this quantity is 11% greater than that obtained using the IPCC 2006 emissions factors, encompassing an 8.4% increase in enteric fermentation methane, a 36.7% increase in manure management methane, and notable variability among regions and sources. For example, revised manure management methane emissions for 2011 in the US increased by 71.8%. For years through 2013, we present (a) annual livestock methane emissions, (b) complete annual livestock carbon budgets, including carbon dioxide emissions, and (c) spatial distributions of livestock methane and other carbon fluxes, downscaled to 0.05 × 0.05 degree resolution. Our revised bottom-up estimates of global livestock methane emissions are comparable to recently reported top-down global estimates for recent years, and account for a significant part of the increase in annual methane emissions since 2007. Our results suggest that livestock methane emissions, while not the dominant overall source of global methane emissions, may be a major contributor to the observed annual emissions increases over the 2000s to 2010s. Differences at regional and local scales may help distinguish livestock methane emissions from those of other sectors in future top-down studies. The revised estimates allow improved reconciliation of top-down and bottom-up estimates of methane emissions, will facilitate the development and evaluation of Earth system models, and provide consistent regional and global Tier 1 estimates for environmental assessments.

X Demographics

X Demographics

The data shown below were collected from the profiles of 94 X users who shared this research output. Click here to find out more about how the information was compiled.
Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 342 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 342 100%

Demographic breakdown

Readers by professional status Count As %
Researcher 57 17%
Student > Master 50 15%
Student > Ph. D. Student 47 14%
Student > Bachelor 36 11%
Other 21 6%
Other 54 16%
Unknown 77 23%
Readers by discipline Count As %
Agricultural and Biological Sciences 79 23%
Environmental Science 57 17%
Earth and Planetary Sciences 19 6%
Engineering 16 5%
Biochemistry, Genetics and Molecular Biology 9 3%
Other 67 20%
Unknown 95 28%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 747. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 14 July 2023.
All research outputs
of 25,738,558 outputs
Outputs from Carbon Balance and Management
of 226 outputs
Outputs of similar age
of 330,392 outputs
Outputs of similar age from Carbon Balance and Management
of 3 outputs
Altmetric has tracked 25,738,558 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 226 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 20.0. This one has done particularly well, scoring higher than 99% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 330,392 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 3 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them