Respiration chambers are one of the primary sources of data on methane emissions from livestock. This paper describes the results from a coordinated set of chamber validation experiments which establishes the absolute accuracy of the methane emission rates measured by the chambers, and for the first time provides metrological traceability to international standards, assesses the impact of both analyser and chamber response times on measurement uncertainty and establishes direct comparability between measurements made across different facilities with a wide range of chamber designs. As a result of the validation exercise the estimated combined uncertainty associated with the overall capability across all facilities reduced from 25.7% (k = 2, 95% confidence) before the validation to 2.1% (k = 2, 95% confidence) when the validation results are applied to the facilities’ data. Document embargo 18/02/2016.
|Number of pages||8|
|Early online date||18 Feb 2015|
|Publication status||Published - 30 Apr 2015|
- respiration chambers
- methane emissions
- livestock emission
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- Faculty of Earth and Life Sciences, Institute of Biological, Environmental & Rural Sciences (IBERS) - Chair in Livestock Science
Person: Teaching And Research