中文摘要：

通过对2006年1月2日发生在华北地区的一次飞机颠簸过程进行诊断分析,并利用MM5中尺度非静力模式对此次过程进行数值模拟分析,结果表明:在高空急流区边缘风切变较大及与高空急流相联系的等温线密集区边缘温度切变较大的区域易产生颠簸.飞机颠簸的发生,是温度平流通过在高空急流附近的等温线密集区边缘所激发出的垂直运动引起.L-P指数反映了空中风切变和温度切变的大小,用MM5输出结果计算的L-P指数对颠簸区范围及强度的判断和预报具有很好的指示意义.

英文摘要：

Based on the analysis of aircraft turbulence occurred in North-China area on 2th January 2006,and its cause are simulated using the mesoscale model(MM5).The results show that the area of the stronger wind shear and temperature shear in the marginal area of upper jet stream is prone to cause aircraft turbulence.Temperature advection in upper jet stream trigger vertical currents in the marginal area of upper jet stream and cause aircraft turbulence.The intensity of wind shear and temperature shear is reflecte...