Periodicity Disruption of a Model Quasibiennial Oscillation of Equatorial Winds

Renaud Antoine; Nadeau Louis-Philippe; Venaille Antoine

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Periodicity Disruption of a Model Quasibiennial Oscillation of Equatorial Winds

机译：赤道风准两年度一次振荡的周期性扰动

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The quasibiennial oscillation (QBO) of equatorial winds on Earth is the clearest example of the spontaneous emergence of a periodic phenomenon in geophysical fluids. In recent years, observations have revealed intriguing disruptions of this regular behavior, and different QBO-like regimes have been reported in a variety of systems. Here, we show that part of the variability in mean-flow reversals can be attributed to the intrinsic dynamics of wave-mean-flow interactions in stratified fluids. Using a constant-in-time monochromatic wave forcing, bifurcation diagrams are mapped for a hierarchy of simplified models of the QBO, ranging from a quasilinear model to fully nonlinear simulations. The existence of new bifurcations associated with faster and shallower flow reversals, as well as a quasiperiodic route to chaos are reported in these models. The possibility for periodicity disruptions is investigated by probing the resilience of regular wind reversals to external perturbations.

机译：赤道风在地球上的准双年度振荡（QBO）是地球物理流体中周期性现象自发出现的最明显例子。近年来，观察结果揭示了这种正常行为的有趣破坏，并且在各种系统中都报道了类似QBO的机制。在这里，我们表明，平均流逆转中的部分可变性可以归因于分层流体中波均值流相互作用的内在动力学。使用时间常数单色波强迫，分叉图被映射为QBO简化模型的层次结构，从准线性模型到完全非线性仿真。这些模型报告了与更快和更浅的流动逆转相关的新分叉的存在，以及准周期性的混沌路径。通过探测常规的风向逆转对外部扰动的回弹力来研究周期性中断的可能性。

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《Physical review letters》 |2019年第21期|214504.1-214504.5|共5页
作者
Renaud Antoine; Nadeau Louis-Philippe; Venaille Antoine;
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Univ Claude Bernard, Univ Lyon, Ens Lyon, CNRS,Lab Phys, F-69342 Lyon, France;

Univ Quebec Rimouski, Inst Sci Mer Rimouski, Rimouski, PQ G5L 3A1, Canada;

Univ Claude Bernard, Univ Lyon, Ens Lyon, CNRS,Lab Phys, F-69342 Lyon, France;

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1. Periodicity Disruption of a Model Quasibiennial Oscillation of Equatorial Winds [J] . Renaud Antoine, Nadeau Louis-Philippe, Venaille Antoine Physical review letters . 2019,第21期

机译：赤道风模型的周期性破坏
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机译：赤道平流层中纬向风准两年一次振荡的模拟：第二部分大气总环流模型
3. Simulation of the Quasi-Biennial Oscillations of the Zonal Wind in the Equatorial Stratosphere:Part I.Low-Parameter Models [J] . D.V.Kulyamin, E.M.Volodin, V.P.Dymnikov Izvestiya Atmospheric and Oceanic Physics . 2008,第1期

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Periodicity Disruption of a Model Quasibiennial Oscillation of Equatorial Winds

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