Articles | Volume 26, issue 2
https://doi.org/10.5194/npg-26-73-2019
https://doi.org/10.5194/npg-26-73-2019
Research article
 | 
07 May 2019
Research article |  | 07 May 2019

Lyapunov analysis of multiscale dynamics: the slow bundle of the two-scale Lorenz 96 model

Mallory Carlu, Francesco Ginelli, Valerio Lucarini, and Antonio Politi

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Short summary
We explore the nature of instabilities in a well-known meteorological toy model, the Lorenz 96, to unravel key mechanisms of interaction between scales of different resolutions and time scales. To do so, we use a mathematical machinery known as Lyapunov analysis, allowing us to capture the degrees of chaoticity associated with fundamental directions of instability. We find a non-trivial group of such directions projecting significantly on slow variables, associated with long term dynamics.