Influence of the Topography on Lee Wave Amplitude in Three-Layer Modle

ZANG Zeng-liang;ZHANG Mei;ZHANG Ming

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Plateau Meteorology ›› 2006, Vol. 25 ›› Issue (3) : 401-405.

Influence of the Topography on Lee Wave Amplitude in Three-Layer Modle

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Abstract

A bell-shaped mountain was used to study the influence of the topographic parameters on the amplitude of the lee wave.The theoretical analysis showed that,if the topographic height remains constant,the lee-wave amplitude attains its greatest value when the topographic half-width is suitably the reciprocalof the wave frequency.If the topographic height and half-width vary by different proportions,the variety of wave amplitude is uncertain.Especially,if the topographic height and half-width vary by the same proportion,i.e.the topographic preserves its shape,the maximum amplitude occurs when the half-width is the double reciprocal of the wave frequency.Then,the sensitivity tests were performed to examine the change of topographic parameters by the ARPS model,which are consistent with theoretical results.

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Scorer parameter / Topographic paramete / Amplitude of lee wav

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ZANG Zeng-liang , ZHANG Mei , ZHANG Ming. Influence of the Topography on Lee Wave Amplitude in Three-Layer Modle. Plateau Meteorology. 2006, 25(3): 401-405

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