Source: LIPASTO -calculation system, VTT
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Average freight air transport emissions and energy consumption per tonne kilometre
      Unit emissions of freight air traffic [g/tkm]
      CO HC NOX CH4 N2O SO2 CO2* CO2eq.** Fuel consumption [g/tkm] Fuel consumption [l/tkm] Energy consumption [MJ/tkm]
Domestic flights   4.7 0.32 7.6 0.013 0.052 0.61 1916 1933 609 0.76 26
Short-haul international flights 4.1 0.31 5.3 0.010 0.038 0.46 1404 1416 447 0.56 19
Long-haul international flights 0.50 0.037 2.4 0.0041 0.016 0.19 595 600 190 0.24 8.2
All distances used in the calculations are defined as great circle distances (GCD).
g/tkm = grams per tonne kilometre
CO = carbon monoxide, HC = hydrocarbons (including methane CH4), NOX = nitrogen oxides, CH4 = methane, N2O = nitrous oxide, SO2 = sulphur dioxide, 
CO2 = carbon dioxide, CO2eq. = carbon dioxide equivalent, MJ = megajoule
*Emission factors for carbon dioxide have been imported from Defra (the UK), the best available source suited to the Finnish circumstances.
Source: 2009 Guidelines to Defra / DECC's GHG Conversion Factors for Company Reporting, 2009.
For further information on how other emission compounds have been calculated, see methodology description. 
**GWP100 (global warming potential) factors for calculating CO2 equivalents:
CO2 ~ 1, CH4 ~ 21, N2O ~ 310
Source: IPCC Second Assessment Report: Climate change 1995, 1995.
7.9.2009
Last updated