Periodic solutions in low-dimensional climatic models

Toni Pujol, Josep Enric Llebot

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)


Classic climatic models use constitutive laws without any response time. A more realistic approach to the natural processes governing climate dynamics must introduce response time for heat and radiation fluxes. Extended irreversible thermodynamics (EIT) is a good thermodynamical framework for introducing nonclassical constitutive laws. In the present study EIT has been used to analyze a Budyko-Sellers one-dimensional energy-balance model developed by G. R. North. The results present self-sustained periodic oscillations when the response time is greater than a critical value. The high-frequency (few kiloyears) damped and nondamped oscillations obtained can be related to abrupt climatic changes without any variation in the external forcing of the system.
Original languageEnglish
Pages (from-to)325-333
JournalJournal of Climate
Issue number2
Publication statusPublished - 1 Jan 1999


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