Climate Change 2001:
Working Group I: The Scientific Basis
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Figure 7.6: Idealised feedback loops involving sea ice. The signs attached to the arrows indicate the correlation between changes in the quantity of the outgoing box with that of the ingoing box, e.g., more sea ice leads to larger albedo. Resulting correlations of a loop are circled and they indicate whether a process is self-reinforced (positive sign) or damped (negative sign). Generally, resulting negative correlations can lead to oscillations, whereas resulting positive correlations may lead to instabilities. The classical ice-albedo effect is shown in the left loop, a feedback involving the overlying atmosphere is on the right.

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