Aviation and the Global Atmosphere

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Figure 6-14: Bar charts of radiative forcing from (a) all perturbations in 1990 (from IPCC, 1996) and (b) aviation effects in 1992. Note scale change from (a) to (b). In (b), best estimate (bars) and high-low 67% probability intervals (whiskers) are given. No best estimate is shown for the cirrus clouds; rather, the dashed line indicates a range of possible estimates. The evaluations below the graph are relative appraisals of the level of scientific understanding associated with each component.

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