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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: Energy

IPCC: 1A3aii - Fuel Combustion Activities - Transport - Civil Aviation - Domestic Aviation
Sector: Transportation : Aviation : Domestic Air transport : Interstate

♦ Activity: Fuel combustion - Jet fuel

♦ Greenhouse gas: Methane ( CH4 )

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► Year 1990 —

● Greenhouse gas emission estimate —

Amount: 521.16 tonnes of CH4 Excluded (10,944 tonnes CO2 Eq.)
Basis: Calculation
Calculation: [Fuel combustion] * [Fuel density] * [Fuel CH4 emission]
Reference: USEPA (2007). Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2005. United States Environmental Protection Agency. EPA 430-R-07-002. Annex 3.2. Methodology for Estimating Emissions of CH4, N2O, and Indirect Greenhouse Gases from Mobile Combustion. April 15, 2007. Washington DC. http://www.epa.gov/climatechange/emissions/usgginv_archive.html

● Activity level used in calculations —

Activity: Fuel combustion = 1,995,153,564 gal of Jet fuel
Basis: Calculation
Calculation: [Total domestic fuel use] * [Interstate miles travelled] / ([Intrastate miles travelled] + [Interstate miles travelled])
Reference: ARB (2009). Technical Support Document for California’s Greenhouse Gas Emissions Inventory and 1990 Emissions Level. California Air Resources Board. (March 2009). Available online at: http://www.arb.ca.gov/cc/inventory/doc/methods_v1/ghg_inventory_technical_support_document.pdf

● Parameters and Constants used in calculations —

Parameter: Fuel CH4 emission = 0.087 g / kg
Reference: USEPA (2007). Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2005. United States Environmental Protection Agency. EPA 430-R-07-002. Annex 3.2. Methodology for Estimating Emissions of CH4, N2O, and Indirect Greenhouse Gases from Mobile Combustion. April 15, 2007. Washington DC. http://www.epa.gov/climatechange/emissions/usgginv_archive.html
Parameter: Fuel density = 3 kg / gal
Reference: USEPA (2007). Inventory of U.S. Greenhouse Gas Emissions and Sinks: 1990-2005. United States Environmental Protection Agency. EPA 430-R-07-002. Annex 6: Additional Information. April 15, 2007. Washington DC. http://www.epa.gov/climatechange/emissions/usgginv_archive.html
Parameter: Interstate miles travelled = 431,942,393 mile
Reference: RITA (2007). U.S. Department of Transportation's (DOT) Research and Innovative Technology Administration (RITA) Bureau of Transportation Statistics database. Database Name: Air Carrier Statistics (Form 41 Traffic)- All Carriers. Accessed online in October 2007, at: http://www.transtats.bts.gov/databases.asp?Mode_ID=1&Mode_Desc=Aviation&Subject_ID2=0
Parameter: Intrastate miles travelled = 105,297,652 mile
Reference: RITA (2007). U.S. Department of Transportation's (DOT) Research and Innovative Technology Administration (RITA) Bureau of Transportation Statistics database. Database Name: Air Carrier Statistics (Form 41 Traffic)- All Carriers. Accessed online in October 2007, at: http://www.transtats.bts.gov/databases.asp?Mode_ID=1&Mode_Desc=Aviation&Subject_ID2=0
Parameter: Total domestic fuel use = 2,481,526,258 gal
Reference: Murtishaw, S., De La Rue du Can, S,. Price, L., Masanet, E., and Simcich, M. (2005). CALEB: California Energy Balance Database, September 12, 2005. Lawrence Berkeley National Laboratory, Berkeley, CA.
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 excluded per unit activity —

Amount: 0.261 g of CH4 per gal of Jet fuel
5.49 g of CO2eq. per gal of Jet fuel