南岭地区大气重力波个例分析

A Case Study of Atmospheric Gravity Wave in Nanling Area

摘要: 本文主要通过MODIS资料分析得到明显重力波个例，然后对其进行分析。运用切变不稳定和非地转平衡关系来对此次重力波进行了验证。结果显示风切变和地转适应对此次重力波的生成有一定的触发作用。运用小波分析的方法对此次重力波进行了深入的分析，分析表明此次重力波的波长主要集中在300 - 350 km附近，高度集中在950 hPa和500 hPa附近。

Abstract: We get an obvious gravity wave case by analysing MODIS data. Then we use theory of shear instability and geostrophic unbalanced relationship to prove it. The result shows that wind shear and geostrophic adjustment all play an important role in the development of gravity wave. Wavelet analysis is used to study the characters of the gravity wave in depth. We find that the wavelength of the gravity wave is centered between 300 - 350 km, and the height is centered between 900 hPa and 500 hPa.