连续Lorenz-96模式中的雪崩、呼吸子和气流回流
Avalanches, Breathers and Flow Reversal in a Continuous Lorenz-96 Model
摘要：
对于Lorenz于1996年提出的离散模型，导出了一个具有非线性激发和扩散的一维长波近似。该模型是能量守恒的，但非哈密顿。在低阶截断弱外部强迫的纬向平均流诱导雪崩般的呼吸解决方案，造成逆转的平均流波平均流相互作用。其机制是一个类似于沙堆模型中雪崩的爆发-补给过程。
英文摘要：
For the discrete model suggested by Lorenz in 1996 a one-dimensional long wave approximation with nonlinear excitation and diffusion is derived. The model is energy conserving but non-Hamiltonian. In a low order truncation weak external forcing of the zonal mean flow induces avalanche-like breather solutions which cause reversal of the mean flow by a wave-mean flow interaction. The mechanism is an outburst-recharge process similar to avalanches in a sand pile model.
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