Vertical Temperature Profiles at Maximum Entropy Production with a Net Exchange Radiative FormulationReportar como inadecuado



 Vertical Temperature Profiles at Maximum Entropy Production with a Net Exchange Radiative Formulation


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Like any fluid heated from below, the atmosphere is subject to vertical instability which triggers convection. Convection occurs on small time and space scales, which makes it a challenging feature to include in climate models. Usually sub-grid parameterizations are required. Here, we develop an alternative view based on a global thermodynamic variational principle. We compute convective flux profiles and temperature profiles at steady-state in an implicit way, by maximizing the associated entropy production rate. Two settings are examined, corresponding respectively to the idealized case of a gray atmosphere, and a realistic case based on a Net Exchange Formulation radiative scheme. In the second case, we are also able to discuss the effect of variations of the atmospheric composition, like a doubling of the carbon dioxide concentration.



Autor: Corentin Herbert; Didier Paillard

Fuente: https://archive.org/







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