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Mechanisms of Decadal Variability of the Wind-Driven Ocean Circulation

机译:风海洋环流年代际变化的机理

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Eddy-resolving quasigeostrophic simulations of wind-driven circulation in a large ocean basin are presented. The results show that strong modes of low-frequency variability arise in many parameter regimes and that the strength of these modes depends upon the presence of inertial recirculations in the flow field. The inertial recirculations arise through advection of anomalous potential vorticity by the western boundary current and are barotropized by the effect of baroclinic eddies in the flow. The mechanism of low-frequency oscillations is explored with reference to previous studies, and it is found that the observed mode can be linked to the gyre mode but is strongly modified by the effect of eddies.
机译:提出了大洋盆风驱动环流的涡旋解析准地转模拟。结果表明,低频可变性的强模式出现在许多参数模式中,并且这些模式的强度取决于流场中惯性再循环的存在。惯性再循环是由西边界流通过平流异常涡旋而产生的,并且由于流动中斜压涡流的作用而被惯性循环。参照先前的研究探索了低频振荡的机理,并且发现观察到的模式可以与回旋模式联系在一起,但是由于涡流的作用而被强烈地改变。

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