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Discussion papers | Copyright
https://doi.org/10.5194/esd-2018-69
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 27 Sep 2018

Research article | 27 Sep 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Earth System Dynamics (ESD).

A Radiative Convective Model based on constrained Maximum Entropy Production

Vincent Labarre1,2, Didier Paillard1, and Bérengère Dubrulle2 Vincent Labarre et al.
  • 1Laboratoire des Sciences du Climat et de l’Environnement, CEA Saclay, Orme des Merisiers, Gif-sur-Yvette, France
  • 2SPHYNX/SPEC/DSM, CEA Saclay, Orme des Merisiers, Gif-sur-Yvette, France

Abstract. The representation of atmospheric convection induced by radiative forcing is a longstanding question mainly because turbulence plays a key role in the transport of energy as sensible heat, geopotential and latent heat. Recent works have tried to use Maximum Entropy Production as a closure hypothesis in Simple Climate Models in order to compute implicitly temperatures and vertical energy flux. However, these models failed to compute realistic profiles. To solve this problem, we prescribe a simplified 1D mass scheme transport which ensures energy fluxes. The later appears as a mechanical constraint which imposes the direction and/or limits the amplitudes of energy fluxes. This leads to a different MEP steady state which depends on the considered energy transfers in the model. Results using such model are improved with respect to another model, not including such effect: temperature and energy flux are closer to the observations and we naturally reproduce stratification when we consider geopotential. Variations of the atmospheric composition, such as doubling of the carbon dioxide concentration, is also investigated.

Vincent Labarre et al.
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We tried to represent atmospheric convection induced by radiative forcing with a simple climate model based on Maximum Entropy Production. Contrary to previous models, we give a minimal description of energy transport in the atmosphere. It allows us to give better results in terms of temperature and vertical energy fluxes profiles.
We tried to represent atmospheric convection induced by radiative forcing with a simple climate...
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