Last reviewed on 06-22-2018

Documentation of California's Greenhouse Gas Inventory (11th Edition - Last updated on 11-06-2019)

♦ 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: Rice crop area -

♦ Greenhouse gas: Methane ( CH4 )

► Year 2011 —

● Greenhouse gas emission estimate —

Amount: 34,141 tonnes of CH4 Emitted (853,536 tonnes CO2 Eq.)
Basis: Model
Calculation: [Rice crop 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. ttps://

● Activity level used in calculations —

Activity: Rice crop area = 240,295 ha
Basis: Model
Reference: USDA (2014). U.S. Department of Agriculture, National Agricultural Statistics Service, Crop Production Summary. Accessed fall 2014. Available online at:

● Parameters and Constants used in calculations —

Parameter: Rice field CH4 emission = 142,081 g / ha
Reference: ARB (2016). Technical support document on GHG inventory methodologies for the 2000-2014 inventory. See Discussion of emissions from agricultural residue burning available at: ttps://
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.).

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

Amount: 142,081 g (i.e. 142.08 kg) of CH4 per ha
3,552,035 g (i.e. 3.55 tonnes) of CO2eq. per ha