Studies of multiple equilibria in ocean-atmosphere-ice simulations of aquaplanets

将使用一系列中间耦合气候模式来研究气候系统的多种平衡状态、海洋热输送在调节稳定冰盖可以延伸的纬度范围方面的作用以及平衡状态的稳定性。建模框架是一个耦合的大气，海洋和海冰模型的aquaplanet海洋环流和土地的范围的几何约束表示的一系列障碍。海洋环流的关键组成部分，如副热带环流，纬向急流，纬向翻转环流将通过改变海洋中的几何障碍来控制。然后将研究它们对耦合系统的平均状态及其维持极地冰盖和多重平衡状态的能力的影响。该提案涉及地球能量平衡、维持极地海冰的过程、与海洋的相互作用以及耦合气候系统的多重平衡等基本问题。

An hierarchy of intermediate coupled climate models will be used to investigate multiple equilibrium states of the climate system, the role of ocean heat transport in mediating the latitudinal range over which stable ice caps can extend, and the stability of the equilibrium states. The modeling framework is a coupled atmosphere, ocean and sea-ice model of an aquaplanet where the geometrical constraints on ocean circulation and extent of land are represented by a sequence of barriers. Key components of the ocean circulation, such as subtropical gyres, zonal jets, and meridional overturning circulation will be controlled by altering the geometrical barriers in the ocean. Their impacts on the mean state of the coupled system and its ability to sustain polar ice caps and multiple equilibrium states will then be examined. The proposal addresses fundamental questions about the energy balance of the planet, the processes that sustain polar sea-ice, interaction with the ocean and multiple equilibrium of the coupled climate system.