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Diagnosing the entropy budget of a climate model

机译:诊断气候模型的熵预算

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摘要

A general circulation model (GCM) of intermediate complexity (Planet Simulator) is subjected to an analysis of the entropy budget and its sensitivity. The entropy production is computed directly based on temperature and temperature tendencies and estimated indirectly based on boundary fluxes. For indirect estimates, the model shows reasonably good agreement with observations. The direct computation indicates deficits of the indirect measures, as they, for example, overestimate the material entropy production (that is, the production by turbulent fluxes). Sensitivity analyses of entropy production are provided, which, depending on changing parameters, hint to a possible applicability of maximum entropy production (MEP) under the constrained dynamics of a complex GCM.
机译:对中等复杂度(Planet Simulator)的通用循环模型(GCM)进行熵预算及其敏感性分析。熵产生直接基于温度和温度趋势进行计算,并基于边界通量间接估计。对于间接估计,该模型与观察值显示出相当好的一致性。直接计算表明间接度量的不足,例如,它们过高地估计了物质熵的产生(即湍流产生的熵)。提供了熵产生的敏感性分析,这取决于变化的参数,暗示在复杂GCM的动力学约束下最大熵产生(MEP)的可能适用性。

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