Fig. 6.

Historical and present-day inventories, and future projections of civil aviation CO₂ emissions from a variety of sources: AERO2K (Eyers et al., 2005); ANCAT/EC2 (Gardner et al., 1998); CONSAVE (Berghof et al., 2005); FAST (Owen and Lee, 2006); IPCC (IPCC, 1999); NASA (Baughcum et al., 1996, Baughcum et al., 1998, Sutkus et al., 2001); SAGE (Kim et al., 2007). The open symbols indicate inventory analysis and the closed symbols indicate projections. Also shown are the CO₂ emissions implied by IEA fuel sales statistics (IEA, 2007). The IEA data represent the total of civil and military usage because all kerosene sales are included. The Sausen and Schumann (2000) data are also based on IEA. In the figure legend, the FAST, CONSAVE, and IPCC symbols are shown in an order that matches the scenario labels in the parentheses in each case (Lee et al., 2009).