Last reviewed on November 2, 2011 at 10:05

Documentation of California's Greenhouse Gas Inventory (First Edition - Last updated on 11/19/2007)

♦ Category: Agriculture, Forestry and Other Land Use

IPCC: 3C7 - Aggregate Sources and Non-CO2 Emissions Sources on Land - Rice Cultivations
Sector: Agriculture & Forestry : Rice Cultivation : Field Crops

♦ Activity: Harvested rice area -

♦ Greenhouse gas: Methane ( CH4 )

► Year 1990 —

● Greenhouse gas emission estimate —

Amount: 19,502 tonnes of CH4 Emitted (409,552 tonnes CO2 Eq.)
Basis: Calculation
Calculation: [Harvested rice area] * [Rice field CH4 emission]
Reference: CEC (2002). Inventory of California Greenhouse Gas Emissions and Sinks: 1990-1999. Publication #600-02-001F. November 2002. California Energy Commission, Sacramento. http://www.energy.ca.gov/reports/600-02-001F/2002-09-14_600-02-001F.PDF

● Activity level used in calculations —

Activity: Harvested rice area = 159,857 ha
Basis: Data
Reference: USDA (2007). U.S. Department of Agriculture, National Agricultural Statistics Service, Crop Production Summary. Accessed June 2007. http://usda.mannlib.cornell.edu/MannUsda/viewDocumentInfo.do?documentID=1047

● Parameters and Constants used in calculations —

Parameter: Rice field CH4 emission = 122,000 g / ha
Reference: CEC (2002). Inventory of California Greenhouse Gas Emissions and Sinks: 1990-1999. Publication #600-02-001F. November 2002. California Energy Commission, Sacramento. http://www.energy.ca.gov/reports/600-02-001F/2002-09-14_600-02-001F.PDF
Constant: Global warming potential of CH4 = 21
Reference: IPCC (1996). Second Assessment Report. Climate Change 1995: WG I - The Science of Climate Change. Intergovernmental Panel on Climate Change; J.T. Houghton, L.G. Meira Filho, B.A. Callander, N. Harris, A. Kattenberg, and K. Maskell (eds.); Cambridge University Press. Cambridge, U.K.

● Greenhouse gas emitted per unit activity —

Amount: 122,000 g (i.e. 122 kg) of CH4 per ha
2,562,000 g (i.e. 2.56 tonnes) of CO2eq. per ha
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