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首页> 外文期刊>Journal of the Atmospheric Sciences >Mechanisms of intraseasonal amplification of the cold Siberian high
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Mechanisms of intraseasonal amplification of the cold Siberian high

机译:冷西伯利亚高压季节内放大的机理

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摘要

Mechanisms of intraseasonal amplification of the Siberian high are investigated on the basis of composite anomaly evolution for its strongest events at each of the grid points over Siberia. At each location, the amplification of the surface high is associated with formation of a blocking ridge in the upper troposphere. Over central and western Siberia, what may be called "wave-train (Atlantic-origin)" type is common, where a blocking ridge forms as a component of a quasi-stationary Rossby wave train propagating across the Eurasian continent. A cold air outbreak follows once anomalous surface cold air reaches the northeastern slope of the Tibetan Plateau.
机译:在复合异常演化的基础上,研究了西伯利亚高压的季节内放大机制,该异常是在西伯利亚每个网格点上最强烈的事件。在每个位置,高地表的放大作用都与对流层上层阻塞脊的形成有关。在西伯利亚中部和西部,通常被称为“波列(大西洋起源)”类型,其中,在整个欧亚大陆上传播的准平稳罗斯比波列的组成部分中,形成了一条阻挡脊。一旦异常的地面冷空气到达青藏高原的东北坡,就会发生冷空气爆发。

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