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Extremal principle of entropy production in the climate system

Paltridge found reasonable values for the most significant climatic variables through maximizing the material transport part of entropy production by using a simple box model. Here, we analyse Paltridge’s box model to obtain the energy and the entropy balance equations separately. Derived expressions for global entropy production, which is a function of the radiation field, and even its material transport component, are shown to be different from those used by Paltridge. Plausible climatic states are found at extrema of these parameters. Feasible results are also obtained by minimizing the radiation part of entropy production, in agreement with one of Planck’s results, Finally, globally averaged values of the entropy flux of radiation and material entropy production are obtained for two dynamical extreme cases: an earth with uniform temperature, and an earth in radiative equilibrium at each latitudinal point

© Quarterly Journal of the Royal Meteorological Society, 1999, vol. 125, núm. 553, p. 79-90

Royal Meteorological Society

Autor: Pujol i Sagaró, Toni
Llebot, Josep Enric
Data: 1999
Resum: Paltridge found reasonable values for the most significant climatic variables through maximizing the material transport part of entropy production by using a simple box model. Here, we analyse Paltridge’s box model to obtain the energy and the entropy balance equations separately. Derived expressions for global entropy production, which is a function of the radiation field, and even its material transport component, are shown to be different from those used by Paltridge. Plausible climatic states are found at extrema of these parameters. Feasible results are also obtained by minimizing the radiation part of entropy production, in agreement with one of Planck’s results, Finally, globally averaged values of the entropy flux of radiation and material entropy production are obtained for two dynamical extreme cases: an earth with uniform temperature, and an earth in radiative equilibrium at each latitudinal point
Format: application/pdf
ISSN: 0035-9009 (versió paper)
1477-870X (versió electrònica)
Accés al document: http://hdl.handle.net/10256/7715
Llenguatge: eng
Editor: Royal Meteorological Society
Col·lecció: Reproducció digital del document publicat a: http://dx.doi.org/10.1002/qj.49712555306
Articles publicats (D-F)
És part de: © Quarterly Journal of the Royal Meteorological Society, 1999, vol. 125, núm. 553, p. 79-90
Drets: Tots els drets reservats
Matèria: Radiació atmosfèrica
Atmospheric radiation
Climatologia
Climatology
Entropia
Entropy
Títol: Extremal principle of entropy production in the climate system
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

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