Inventory of methane emissions from livestock in China from 1980 to 2013

Yu Jiashuo, Peng Shushi, Chang Jinfeng, Ciais Philippe, Dumas Patrice, Lin Xin, Piao Shilong. 2018. Inventory of methane emissions from livestock in China from 1980 to 2013. Atmospheric Environment, 184 : 69-76.

https://doi.org/10.1016/j.atmosenv.2018.04.029

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Quartile : Q1, Sujet : METEOROLOGY & ATMOSPHERIC SCIENCES / Quartile : Q1, Sujet : ENVIRONMENTAL SCIENCES

Résumé : Livestock is the largest anthropogenic methane (CH4) source at the global scale. Previous inventories of this source for China were based on the accounting of livestock populations and constant emission factors (EFs) per head. Here, we re-evaluate how livestock CH4 emissions have changed from China over the last three decades, considering increasing population, body weight and milk production per head which cause EF to change with time, and decreasing average life span (ALS) of livestock. Our results show that annual CH4 emissions by livestock have increased from 4.5 to 11.8 Tg CH4 yr−1 over the period 1980–2013. The increasing trend in emissions (0.25 Tg CH4 yr−2) over this period is ∼12% larger than that if using constant EFs and ALS. The increasing livestock population, production per head and decreasing ALS contributed +91%, +28% and −19% to the increase in CH4 emissions from livestock, respectively. This implies that the temporal changes in EF and ALS of livestock cannot be overlooked in inventories, especially in countries like China where livestock production systems are experiencing rapid transformations.

Mots-clés géographiques Agrovoc : Chine

Mots-clés libres : Methane emission, Livestock, Emission factor, Production, China

Classification Agris : P02 - Pollution
L01 - Élevage - Considérations générales

Champ stratégique Cirad : Axe 1 (2014-2018) - Agriculture écologiquement intensive

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