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| Titel |
Entropy production and multiple equilibria: the case of the ice-albedo feedback |
| VerfasserIn |
C. Herbert, D. Paillard, B. Dubrulle |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
2190-4979
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| Digitales Dokument |
URL |
| Erschienen |
In: Earth System Dynamics ; 2, no. 1 ; Nr. 2, no. 1 (2011-02-23), S.13-23 |
| Datensatznummer |
250000457
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| Publikation (Nr.) |
 copernicus.org/esd-2-13-2011.pdf |
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| Zusammenfassung |
| Nonlinear feedbacks in the Earth System provide mechanisms that can prove
very useful in understanding complex dynamics with relatively simple
concepts. For example, the temperature and the ice cover of the planet are
linked in a positive feedback which gives birth to multiple equilibria for
some values of the solar constant: fully ice-covered Earth, ice-free Earth
and an intermediate unstable solution. In this study, we show an analogy
between a classical dynamical system approach to this problem and a Maximum
Entropy Production (MEP) principle view, and we suggest a glimpse on how to
reconcile MEP with the time evolution of a variable. It enables us in
particular to resolve the question of the stability of the entropy production
maxima. We also compare the surface heat flux obtained with MEP and with the
bulk-aerodynamic formula. |
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