Last reviewed on 10-02-2020

Documentation of California's Greenhouse Gas Inventory (13th Edition - Last updated on 10-15-2020)

♦ Category: Agriculture, Forestry and Other Land Use

IPCC: 3A1c - Livestock - Enteric Fermentation - Sheep
Sector: Agriculture & Forestry : Enteric Fermentation : Other Livestock

♦ Activity: Livestock population - Sheep

♦ Greenhouse gas: Methane ( CH4 )

► Year 2010 —

● Greenhouse gas emission estimate —

Amount: 4,880 tonnes of CH4 Emitted (122,000 tonnes CO2 Eq.)
Basis: Calculation
Calculation: [Livestock population] * [CH4 emission factor]
Reference: IPCC (2006). 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Prepared by the National Greenhouse Gas Inventories Programmed, Eggleston HAS., Biennia L., Miwa K., Negara T. and Tanabe K. (eds). Vol.4, Chap. 10: Livestock and Manure Management. Published: IGES, Japan. #http://www.ipcc-nggip.iges.or.jp/public/2006gl/pdf/4_Volume4/V4_10_Ch10_Livestock.pdf

● Activity level used in calculations —

Activity: Livestock population = 610,000 head of Sheep
Basis: Data
Reference: USDA (2016). U.S. Department of Agriculture, National Agricultural Statistics Service, Quick Stats. Accessed online at: #http://quickstats.nass.usda.gov/

● Parameters and Constants used in calculations —

Parameter: CH4 emission factor = 8,000 g / individual
Reference: IPCC (2006). 2006 IPCC Guidelines for National Greenhouse Gas Inventories, Prepared by the National Greenhouse Gas Inventories Programmed, Eggleston HAS., Biennia L., Miwa K., Negara T. and Tanabe K. (eds). Vol.4, Chap. 10: Livestock and Manure Management. Published: IGES, Japan. #http://www.ipcc-nggip.iges.or.jp/public/2006gl/pdf/4_Volume4/V4_10_Ch10_Livestock.pdf
Constant: Global warming potential of CH4 = 25
Reference: IPCC (2007). Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Solomon S., Qin D., Manning M., Chen Z., Marquis M., Averyt K.B., Tignor M., and Miller H.L. (eds.). #http://www.ipcc.ch/publications_and_data/publications_ipcc_fourth_assessment_report_synthesis_report.htm

● Greenhouse gas emitted per unit activity (derived from values listed above) —

Amount: 8,000 g (i.e. 8 kg) of CH4 per head of Sheep
200,000 g (i.e. 200 kg) of CO2eq. per head of Sheep