Oscillating forcings and new regimes in the Lorenz system: a four-lobe attractor

Pelino, V.; Maimone, F.; Pasini, A.

doi:https://doi.org/10.5194/npg-19-315-2012

Articles | Volume 19, issue 3

Nonlin. Processes Geophys., 19, 315–322, 2012

https://doi.org/10.5194/npg-19-315-2012

© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

Nonlin. Processes Geophys., 19, 315–322, 2012

https://doi.org/10.5194/npg-19-315-2012

© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 19, issue 3

Research article 08 May 2012

Research article | 08 May 2012

Oscillating forcings and new regimes in the Lorenz system: a four-lobe attractor

V. Pelino¹, F. Maimone¹, and A. Pasini² V. Pelino et al. V. Pelino¹, F. Maimone¹, and A. Pasini²

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¹Italian Air Force, CNMCA, Pratica di Mare (Rome), Italy
²CNR, Institute of Atmospheric Pollution Research, Rome, Italy

Received: 31 Jan 2012 – Revised: 03 Apr 2012 – Accepted: 11 Apr 2012 – Published: 08 May 2012

Abstract. It has been shown that forced Lorenz models generally maintain their two-lobe structure, just giving rise to changes in the occurrence of their regimes. Here, using the richness of a unified formalism for Kolmogorov-Lorenz systems, we show that introducing oscillating forcings can lead to the birth of new regimes and to a four-lobe attractor. Analogies within a climate dynamics framework are mentioned.