论文标题
多模式激发以建模准生物振荡
Multi-modal excitation to model the Quasi-Biennial Oscillation
论文作者
论文摘要
平流层风的准生物振荡（QBO）是内部波的非线性相互作用的平均流量产生和逆转的最引人注目的例子。先前的研究使用了理想的单色强迫来研究QBO。相反，我们强迫更逼真的连续波谱。出乎意料的是，将波能传播到较大的频率范围内会导致更多规则的振荡。我们还发现不同的强迫光谱可以产生相同的QBO。因此，多模式波强度对于理解自然界中的波/平均流相互作用至关重要。
The Quasi-Biennial Oscillation (QBO) of stratospheric winds is the most striking example of mean-flow generation and reversal by the non-linear interactions of internal waves. Previous studies have used an idealized monochromatic forcing to investigate the QBO. Here we instead force a more realistic continuous wave spectrum. Unexpectedly, spreading the wave energy across a wide frequency range leads to more regular oscillations. We also find that different forcing spectra can yield the same QBO. Multi-modal wave forcing is thus essential for understanding wave/mean-flow interactions in nature.
