Definition of 1A3a Civil Aviation Source Category
Emissions from international civil aviation and domestic air transport (commercial, private, agricultural, etc.), including take-offs and landings. Exclude use of fuel at airports for ground transport which is reported under 1 A 3 e Other Transportation (below). Also exclude fuel for stationary combustion at airports; report this information under the appropriate stationary combustion category.
United Nations Framework Convention on Climate Change (UNFCCC), Updated UNFCCC reporting guidelines on annual inventories following incorporation of the provisions of decision 14/CP.11. 2006.
Available online at: http://unfccc.int/resource/docs/2006/sbsta/eng/09.pdf
Revised 1996 IPCC Guidelines for National Greenhouse Gas Inventories: Reporting Instructions. Section 1.1, "Source/sink categories."
Available online at: http://www.ipcc-nggip.iges.or.jp/public/gl/guidelin/ch1ri.pdf