Figure 58. Schematic showing the influence of climate
feedbacks on the amount and sign of radiative forcing driving a climate
model. The arrows are indicative of the magnitude and sign of individual
feedbacks, as determined from a Bureau of Meteorology Research Centre (BMRC)
climate model. The dominant positive feedback is due to water vapour. In
the BMRC model, cloud feedback is positive, but this varies greatly between models. The
range in surface temperature changes indicated results from the varying
effect of all feedbacks, but particularly of clouds.
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