Key points are not available for this paper at this time.
New long-term (days) measurements of the evolution of turbulence for a Rayleigh-B\'enard system with aspect ratio =4. 72 reveal a turbulent state, with a threshold near the critical Rayleigh number R₂, which consists of a random background time dependence and rare, randomly spaced, major events. These events are discussed in terms of the analog of a particle under the influence of a stochastic driving force and in a potential with two minima.
Ahlers et al. (Mon,) studied this question.