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Energy balance climate models, damage reservoirs and the time profile of climate change policy

机译:能量平衡气候模型,破坏水库和气候变化政策的时间特征

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摘要

A simplified energy balance climate model is considered with the global mean temperature as the state variable, and an endogenous ice line. The movements of the ice line towards the Poles are associated with damage reservoirs where initial damages are high and then eventually vanish as the ice caps vanish and the damage reservoir is exhausted. We couple this climate model with a simple economic growth model and we show that the endogenous ice line induces a nonlinearity. This nonlinearity when combined with two sources of damages - the conventional damages due to temperature increase and the reservoir damages - generates multiple steady states and Skiba points. It is shown that the policy ramp implied by this model calls for high mitigation now. Simulation results suggest that the policy ramp could be U-shaped instead of the monotonically increasing with low starting mitigation gradualist policy ramp.
机译:考虑一个简化的能量平衡气候模型,其中以全球平均温度为状态变量,并使用内生冰线。冰线向波兰的运动与损害储集层有关,初始损害较高,然后随着冰帽消失和损害储集层耗尽而最终消失。我们将此气候模型与一个简单的经济增长模型结合在一起,并表明内生冰线会引起非线性。这种非线性与两个损坏源(温度升高造成的常规损坏和储层损坏)结合在一起时,会产生多个稳态和Skiba点。结果表明,该模型所隐含的政策倾斜现在要求高度缓解。仿真结果表明,政策缓动可能是U形的,而不是在低启动缓和渐进政策缓动下单调增加。

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