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: 3C5 - Aggregate Sources and Non-CO2 Emissions Sources on Land - Indirect N2O Emissions from Managed Soils
Sector: Agriculture & Forestry : Ag Soil Management : Manure : Indirect

♦ Activity: Nitrogen in managed manure - Dairy heifers

♦ Greenhouse gas: Nitrous oxide ( N2O )

► Year 2018 —

● Greenhouse gas emission estimate —

Amount: 246.05 tonnes of N2O Emitted (73,322 tonnes CO2 Eq.)
Basis: Calculation
Calculation: [Nitrogen in managed manure] * ([Volatilization rate] * [Redeposited nitrogen emitted as N2O]+[Leaching rate]*[Leached nitrogen emitted as N2O]) * [Molecular weight ratio of N2O to N2]
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. 11: Managed Soils. Published: IGES, Japan. #https://www.ipcc-nggip.iges.or.jp/public/2006gl/vol4.html

● Activity level used in calculations —

Activity: Nitrogen in managed manure = 36,848,389,281 g (i.e. 36.85 thousand tonnes) of Dairy heifers
Basis: Compilation
Reference: ARB (2016). Technical support document on GHG inventory methodologies for the 2000-2014 inventory. See Discussion of nitrous oxide emissions from agricultural soil management available at: https://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf#https://ww3.arb.ca.gov/cc/inventory/pubs/reports/2000_2014/ghg_inventory_00-14_technical_support_document.pdf

● Parameters and Constants used in calculations —

Parameter: Leached nitrogen emitted as N2O = 7.500E-03
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. 11: Managed Soils. Published: IGES, Japan. #https://www.ipcc-nggip.iges.or.jp/public/2006gl/vol4.html
Parameter: Leaching rate = 0.3
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. 11: Managed Soils. Published: IGES, Japan. #https://www.ipcc-nggip.iges.or.jp/public/2006gl/vol4.html
Parameter: Nitrogen emitted as N2O = 0.01 g / g
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. 11: Managed Soils. Published: IGES, Japan. #https://www.ipcc-nggip.iges.or.jp/public/2006gl/vol4.html
Parameter: Redeposited nitrogen emitted as N2O = 0.01 g / g
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. 11: Managed Soils. Published: IGES, Japan. #https://www.ipcc-nggip.iges.or.jp/public/2006gl/vol4.html
Parameter: Volatilization rate = 0.2 g / g
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. 11: Managed Soils. Published: IGES, Japan. #https://www.ipcc-nggip.iges.or.jp/public/2006gl/vol4.html
Constant: Molecular weight ratio of N2O to N2 = 1.571133815
Reference: IUPAC (2006). Atomic Weights of the Elements 2005 (IUPAC Technical Report). Pure Appl. Chem., Vol. 78, No. 11, pp. 20512066, 2006.
Constant: Global warming potential of N2O = 298
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: 6.677E-03 g of N2O per g of Dairy heifers
1.99 g of CO2eq. per g of Dairy heifers