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A simple conceptual model of abrupt glacial climate events

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Academic year: 2017

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Fig. 1. DO events as seen in the GISP2 ice-core from Greenland (Grootes et al., 1993; Grootes and Stuiver, 1997)
Fig. 2. Dynamics of our conceptual model. Shown is the time evo- evo-lution of the model, in response to a forcing that is large enough to trigger switches between both model states
Fig. 3. Stochastic resonance. The input consists of: 1. a sub- sub-threshold sinusoidal signal with a period of 1470 years and an  am-plitude of 4.5 mSv (about 40 percent of the threshold value B 1 above which DO events occur in the model), 2
Fig. 4. Distribution of the spacing 1T between successive events. The input in (a) and (b) consists of noise only, with a standard deviation σ of 8 mSv (as in Fig
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