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Titolo:
Self-sustained temperature oscillations on Daisyworld
Autore:
Nevison, C; Gupta, V; Klinger, L;
Indirizzi:
Natl Ctr Atmospher Res, Boulder, CO 80307 USA Natl Ctr Atmospher Res Boulder CO USA 80307 er Res, Boulder, CO 80307 USA Univ Colorado, Boulder, CO 80303 USA Univ Colorado Boulder CO USA 80303Univ Colorado, Boulder, CO 80303 USA
Titolo Testata:
TELLUS SERIES B-CHEMICAL AND PHYSICAL METEOROLOGY
fascicolo: 4, volume: 51, anno: 1999,
pagine: 806 - 814
SICI:
0280-6509(199909)51:4<806:STOOD>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
CLIMATE MODEL; SURFACE-TEMPERATURE; GLOBAL CLIMATE; NORTH-ATLANTIC; FEEDBACK; SEA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Nevison, C Natl Ctr Atmospher Res, POB 3000, Boulder, CO 80307 USA Natl Ctr Atmospher Res POB 3000 Boulder CO USA 80307 80307 USA
Citazione:
C. Nevison et al., "Self-sustained temperature oscillations on Daisyworld", TELLUS B, 51(4), 1999, pp. 806-814

Abstract

The daisyworld model of Watson and Lovelock demonstrated that a simple biological feedback system involving coupling between black and white daisies and their physical environment can stabilize planetary temperature over a wide range of solar luminosity. Here, we show that the addition of a differential equation for temperature to the original daisyworld model leads to periodic oscillations in temperature about a homeostatic mean. These oscillations, in which the model alternates between dominance by either black or white daisies, arise from the internal dynamics of the system rather than from external forcing. An important criterion for the oscillations to occur isthat solar luminosity be within the range in which both daisy species are viable. A second important criterion is that the ratio of the timescales for daisy population turnover and climate system thermal response be bounded. While internally driven oscillations are well known in predator-prey biological models and in coupled ocean energy balance-cryosphere models, the present study shows that such oscillations also can arise in a model of the biosphere coupled to its physical environment. The potential significance of this result to planet Earth and the science of geophysiology is discussed.

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Documento generato il 11/08/20 alle ore 15:42:05