Base year

base year emissions, under the Kyoto Protocol, are defined as the aggregate anthropogenic carbon dioxide equivalent emissions of the GHGs listed in Annex A sources in a historical base year. For most Annex I Parties, the historical base year is 1990 but Parties included in Annex I undergoing the process of transition to a market economy may choose a year or period other than 1990, in accordance with Article 3, paragraph 52. Annex I Parties may choose to use 1995 as the base year for total emissions of hydrofluorocarbons, perfluorocarbons and sulphur hexafluoride (F-gases), in accordance with Article 3, paragraph 8.

(for an Article 6) the scenario that reasonably represents the anthropogenic emissions by sources or anthropogenic removals by sinks of GHGs that would occur in the absence of the proposed project (9/CMP.1, Annex, Appendix B, paragraph 1). A baseline shall cover emissions from all gases, sectors and source categories listed in Annex A, and anthropogenic removals by sinks, within the project boundary (9/CMP.1, Annex, Appendix B, paragraph 1).